// Copyright 2020 Damir Jelić
// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#[cfg(feature = "encryption")]
use std::{collections::BTreeMap, io::Write, path::PathBuf};
use std::{
    convert::TryInto,
    fmt::{self, Debug},
    future::Future,
    io::Read,
    path::Path,
    result::Result as StdResult,
    sync::Arc,
};

#[cfg(feature = "encryption")]
use dashmap::DashMap;
use futures_timer::Delay as sleep;
use http::HeaderValue;
use mime::{self, Mime};
use reqwest::header::InvalidHeaderValue;
use url::Url;
#[cfg(feature = "encryption")]
use zeroize::Zeroizing;

#[cfg(feature = "encryption")]
use tracing::{debug, warn};
use tracing::{error, info, instrument};

use matrix_sdk_base::{
    deserialized_responses::{MembersResponse, SyncResponse},
    BaseClient, BaseClientConfig, EventHandler, InvitedRoom, JoinedRoom, LeftRoom, Session, Store,
};

#[cfg(feature = "encryption")]
use matrix_sdk_base::crypto::{
    decrypt_key_export, encrypt_key_export, olm::InboundGroupSession, store::CryptoStoreError,
    AttachmentEncryptor, OutgoingRequests, RoomMessageRequest, ToDeviceRequest,
};

/// Enum controlling if a loop running callbacks should continue or abort.
///
/// This is mainly used in the [`sync_with_callback`] method, the return value
/// of the provided callback controls if the sync loop should be exited.
///
/// [`sync_with_callback`]: #method.sync_with_callback
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LoopCtrl {
    /// Continue running the loop.
    Continue,
    /// Break out of the loop.
    Break,
}

use matrix_sdk_common::{
    api::r0::{
        account::register,
        device::{delete_devices, get_devices},
        directory::{get_public_rooms, get_public_rooms_filtered},
        filter::{create_filter::Request as FilterUploadRequest, FilterDefinition},
        media::create_content,
        membership::{
            ban_user, forget_room, get_member_events,
            invite_user::{self, InvitationRecipient},
            join_room_by_id, join_room_by_id_or_alias, kick_user, leave_room, Invite3pid,
        },
        message::{get_message_events, send_message_event},
        profile::{get_avatar_url, get_display_name, set_avatar_url, set_display_name},
        read_marker::set_read_marker,
        receipt::create_receipt,
        room::create_room,
        session::login,
        sync::sync_events,
        typing::create_typing_event::{
            Request as TypingRequest, Response as TypingResponse, Typing,
        },
        uiaa::AuthData,
    },
    assign,
    events::{
        room::{
            message::{
                AudioMessageEventContent, FileMessageEventContent, ImageMessageEventContent,
                MessageEventContent, VideoMessageEventContent,
            },
            EncryptedFile,
        },
        AnyMessageEventContent,
    },
    identifiers::{DeviceIdBox, EventId, RoomId, RoomIdOrAliasId, ServerName, UserId},
    instant::{Duration, Instant},
    presence::PresenceState,
    uuid::Uuid,
    FromHttpResponseError, UInt,
};

#[cfg(feature = "encryption")]
use matrix_sdk_common::{
    api::r0::{
        keys::{get_keys, upload_keys, upload_signing_keys::Request as UploadSigningKeysRequest},
        to_device::send_event_to_device::{
            Request as RumaToDeviceRequest, Response as ToDeviceResponse,
        },
    },
    locks::Mutex,
};

use crate::{
    error::HttpError,
    http_client::{client_with_config, HttpClient, HttpSend},
    Error, OutgoingRequest, Result,
};

#[cfg(feature = "encryption")]
use crate::{
    device::{Device, UserDevices},
    identifiers::DeviceId,
    sas::Sas,
    verification_request::VerificationRequest,
};

const DEFAULT_SYNC_TIMEOUT: Duration = Duration::from_secs(30);
/// Give the sync a bit more time than the default request timeout does.
const SYNC_REQUEST_TIMEOUT: Duration = Duration::from_secs(15);
/// A conservative upload speed of 1Mbps
const DEFAULT_UPLOAD_SPEED: u64 = 125_000;
/// 5 min minimal upload request timeout, used to clamp the request timeout.
const MIN_UPLOAD_REQUEST_TIMEOUT: Duration = Duration::from_secs(60 * 5);

/// An async/await enabled Matrix client.
///
/// All of the state is held in an `Arc` so the `Client` can be cloned freely.
#[derive(Clone)]
pub struct Client {
    /// The URL of the homeserver to connect to.
    homeserver: Arc<Url>,
    /// The underlying HTTP client.
    http_client: HttpClient,
    /// User session data.
    pub(crate) base_client: BaseClient,
    /// Locks making sure we only have one group session sharing request in
    /// flight per room.
    #[cfg(feature = "encryption")]
    group_session_locks: DashMap<RoomId, Arc<Mutex<()>>>,
    #[cfg(feature = "encryption")]
    /// Lock making sure we're only doing one key claim request at a time.
    key_claim_lock: Arc<Mutex<()>>,
}

#[cfg(not(tarpaulin_include))]
impl Debug for Client {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> StdResult<(), fmt::Error> {
        write!(fmt, "Client {{ homeserver: {} }}", self.homeserver)
    }
}

/// Configuration for the creation of the `Client`.
///
/// When setting the `StateStore` it is up to the user to open/connect
/// the storage backend before client creation.
///
/// # Example
///
/// ```
/// # use matrix_sdk::ClientConfig;
/// // To pass all the request through mitmproxy set the proxy and disable SSL
/// // verification
/// let client_config = ClientConfig::new()
///     .proxy("http://localhost:8080")
///     .unwrap()
///     .disable_ssl_verification();
/// ```
#[derive(Default)]
pub struct ClientConfig {
    #[cfg(not(target_arch = "wasm32"))]
    pub(crate) proxy: Option<reqwest::Proxy>,
    pub(crate) user_agent: Option<HeaderValue>,
    pub(crate) disable_ssl_verification: bool,
    pub(crate) base_config: BaseClientConfig,
    pub(crate) timeout: Option<Duration>,
    pub(crate) client: Option<Arc<dyn HttpSend>>,
}

#[cfg(not(tarpaulin_include))]
impl Debug for ClientConfig {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        let mut res = fmt.debug_struct("ClientConfig");

        #[cfg(not(target_arch = "wasm32"))]
        let res = res.field("proxy", &self.proxy);

        res.field("user_agent", &self.user_agent)
            .field("disable_ssl_verification", &self.disable_ssl_verification)
            .finish()
    }
}

impl ClientConfig {
    /// Create a new default `ClientConfig`.
    pub fn new() -> Self {
        Default::default()
    }

    /// Set the proxy through which all the HTTP requests should go.
    ///
    /// Note, only HTTP proxies are supported.
    ///
    /// # Arguments
    ///
    /// * `proxy` - The HTTP URL of the proxy.
    ///
    /// # Example
    ///
    /// ```
    /// use matrix_sdk::ClientConfig;
    ///
    /// let client_config = ClientConfig::new()
    ///     .proxy("http://localhost:8080")
    ///     .unwrap();
    /// ```
    #[cfg(not(target_arch = "wasm32"))]
    pub fn proxy(mut self, proxy: &str) -> Result<Self> {
        self.proxy = Some(reqwest::Proxy::all(proxy)?);
        Ok(self)
    }

    /// Disable SSL verification for the HTTP requests.
    pub fn disable_ssl_verification(mut self) -> Self {
        self.disable_ssl_verification = true;
        self
    }

    /// Set a custom HTTP user agent for the client.
    pub fn user_agent(mut self, user_agent: &str) -> StdResult<Self, InvalidHeaderValue> {
        self.user_agent = Some(HeaderValue::from_str(user_agent)?);
        Ok(self)
    }

    ///// Set a custom implementation of a `StateStore`.
    /////
    ///// The state store should be opened before being set.
    //pub fn state_store(mut self, store: Box<dyn StateStore>) -> Self {
    //    self.base_config = self.base_config.state_store(store);
    //    self
    //}

    /// Set the path for storage.
    ///
    /// # Arguments
    ///
    /// * `path` - The path where the stores should save data in. It is the
    /// callers responsibility to make sure that the path exists.
    ///
    /// In the default configuration the client will open default
    /// implementations for the crypto store and the state store. It will use
    /// the given path to open the stores. If no path is provided no store will
    /// be opened
    pub fn store_path(mut self, path: impl AsRef<Path>) -> Self {
        self.base_config = self.base_config.store_path(path);
        self
    }

    /// Set the passphrase to encrypt the crypto store.
    ///
    /// # Argument
    ///
    /// * `passphrase` - The passphrase that will be used to encrypt the data in
    /// the cryptostore.
    ///
    /// This is only used if no custom cryptostore is set.
    pub fn passphrase(mut self, passphrase: String) -> Self {
        self.base_config = self.base_config.passphrase(passphrase);
        self
    }

    /// Set a timeout duration for all HTTP requests. The default is no timeout.
    pub fn timeout(mut self, timeout: Duration) -> Self {
        self.timeout = Some(timeout);
        self
    }

    /// Specify a client to handle sending requests and receiving responses.
    ///
    /// Any type that implements the `HttpSend` trait can be used to send/receive
    /// `http` types.
    pub fn client(mut self, client: Arc<dyn HttpSend>) -> Self {
        self.client = Some(client);
        self
    }
}

#[derive(Debug, Default, Clone)]
/// Settings for a sync call.
pub struct SyncSettings<'a> {
    pub(crate) filter: Option<sync_events::Filter<'a>>,
    pub(crate) timeout: Option<Duration>,
    pub(crate) token: Option<String>,
    pub(crate) full_state: bool,
}

impl<'a> SyncSettings<'a> {
    /// Create new default sync settings.
    pub fn new() -> Self {
        Default::default()
    }

    /// Set the sync token.
    ///
    /// # Arguments
    ///
    /// * `token` - The sync token that should be used for the sync call.
    pub fn token(mut self, token: impl Into<String>) -> Self {
        self.token = Some(token.into());
        self
    }

    /// Set the maximum time the server can wait, in milliseconds, before
    /// responding to the sync request.
    ///
    /// # Arguments
    ///
    /// * `timeout` - The time the server is allowed to wait.
    pub fn timeout(mut self, timeout: Duration) -> Self {
        self.timeout = Some(timeout);
        self
    }

    /// Set the sync filter.
    /// It can be either the filter ID, or the definition for the filter.
    ///
    /// # Arguments
    ///
    /// * `filter` - The filter configuration that should be used for the sync call.
    pub fn filter(mut self, filter: sync_events::Filter<'a>) -> Self {
        self.filter = Some(filter);
        self
    }

    /// Should the server return the full state from the start of the timeline.
    ///
    /// This does nothing if no sync token is set.
    ///
    /// # Arguments
    /// * `full_state` - A boolean deciding if the server should return the full
    ///     state or not.
    pub fn full_state(mut self, full_state: bool) -> Self {
        self.full_state = full_state;
        self
    }
}

impl Client {
    /// Creates a new client for making HTTP requests to the given homeserver.
    ///
    /// # Arguments
    ///
    /// * `homeserver_url` - The homeserver that the client should connect to.
    pub fn new(homeserver_url: impl TryInto<Url>) -> Result<Self> {
        let config = ClientConfig::new();
        Client::new_with_config(homeserver_url, config)
    }

    /// Create a new client with the given configuration.
    ///
    /// # Arguments
    ///
    /// * `homeserver_url` - The homeserver that the client should connect to.
    ///
    /// * `config` - Configuration for the client.
    pub fn new_with_config(
        homeserver_url: impl TryInto<Url>,
        config: ClientConfig,
    ) -> Result<Self> {
        let homeserver = if let Ok(u) = homeserver_url.try_into() {
            Arc::new(u)
        } else {
            panic!("Error parsing homeserver url")
        };

        let client = if let Some(client) = config.client {
            client
        } else {
            Arc::new(client_with_config(&config)?)
        };

        let base_client = BaseClient::new_with_config(config.base_config)?;
        let session = base_client.session().clone();

        let http_client = HttpClient {
            homeserver: homeserver.clone(),
            inner: client,
            session,
        };

        Ok(Self {
            homeserver,
            http_client,
            base_client,
            #[cfg(feature = "encryption")]
            group_session_locks: DashMap::new(),
            #[cfg(feature = "encryption")]
            key_claim_lock: Arc::new(Mutex::new(())),
        })
    }

    /// Is the client logged in.
    pub async fn logged_in(&self) -> bool {
        self.base_client.logged_in().await
    }

    /// The Homeserver of the client.
    pub fn homeserver(&self) -> &Url {
        &self.homeserver
    }

    /// Get the user id of the current owner of the client.
    pub async fn user_id(&self) -> Option<UserId> {
        let session = self.base_client.session().read().await;
        session.as_ref().cloned().map(|s| s.user_id)
    }

    /// Get the device id that identifies the current session.
    pub async fn device_id(&self) -> Option<DeviceIdBox> {
        let session = self.base_client.session().read().await;
        session.as_ref().map(|s| s.device_id.clone())
    }

    /// Fetches the display name of the owner of the client.
    ///
    /// # Example
    /// ```no_run
    /// # use futures::executor::block_on;
    /// # use matrix_sdk::Client;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    /// let user = "example";
    /// let client = Client::new(homeserver).unwrap();
    /// client.login(user, "password", None, None).await.unwrap();
    ///
    /// if let Some(name) = client.display_name().await.unwrap() {
    ///     println!("Logged in as user '{}' with display name '{}'", user, name);
    /// }
    /// # })
    /// ```
    pub async fn display_name(&self) -> Result<Option<String>> {
        let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
        let request = get_display_name::Request::new(&user_id);
        let response = self.send(request, None).await?;
        Ok(response.displayname)
    }

    /// Sets the display name of the owner of the client.
    ///
    /// # Example
    /// ```no_run
    /// # use futures::executor::block_on;
    /// # use matrix_sdk::Client;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    /// let user = "example";
    /// let client = Client::new(homeserver).unwrap();
    /// client.login(user, "password", None, None).await.unwrap();
    ///
    /// client.set_display_name(Some("Alice")).await.expect("Failed setting display name");
    /// # })
    /// ```
    pub async fn set_display_name(&self, name: Option<&str>) -> Result<()> {
        let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
        let request = set_display_name::Request::new(&user_id, name);
        self.send(request, None).await?;
        Ok(())
    }

    /// Gets the mxc avatar url of the owner of the client, if set.
    ///
    /// # Example
    /// ```no_run
    /// # use futures::executor::block_on;
    /// # use matrix_sdk::Client;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    /// # let user = "example";
    /// let client = Client::new(homeserver).unwrap();
    /// client.login(user, "password", None, None).await.unwrap();
    ///
    /// if let Some(url) = client.avatar_url().await.unwrap() {
    ///     println!("Your avatar's mxc url is {}", url);
    /// }
    /// # })
    /// ```
    pub async fn avatar_url(&self) -> Result<Option<String>> {
        let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
        let request = get_avatar_url::Request::new(&user_id);
        let response = self.send(request, None).await?;
        Ok(response.avatar_url)
    }

    /// Get a reference to the store.
    pub fn store(&self) -> &Store {
        self.base_client.store()
    }

    /// Sets the mxc avatar url of the client's owner. The avatar gets unset if `url` is `None`.
    pub async fn set_avatar_url(&self, url: Option<&str>) -> Result<()> {
        let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
        let request = set_avatar_url::Request::new(&user_id, url);
        self.send(request, None).await?;
        Ok(())
    }

    /// Upload and set the owning client's avatar.
    ///
    /// The will upload the data produced by the reader to the homeserver's content repository, and
    /// set the user's avatar to the mxc url for the uploaded file.
    ///
    /// This is a convenience method for calling [`upload()`](#method.upload), followed by
    /// [`set_avatar_url()`](#method.set_avatar_url).
    ///
    /// # Example
    /// ```no_run
    /// # use std::{path::Path, fs::File, io::Read};
    /// # use futures::executor::block_on;
    /// # use matrix_sdk::Client;
    /// # use url::Url;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://locahost:8080").unwrap();
    /// # let client = Client::new(homeserver).unwrap();
    /// let path = Path::new("/home/example/selfie.jpg");
    /// let mut image = File::open(&path).unwrap();
    ///
    /// client.upload_avatar(&mime::IMAGE_JPEG, &mut image).await.expect("Can't set avatar");
    /// # })
    /// ```
    pub async fn upload_avatar<R: Read>(&self, content_type: &Mime, reader: &mut R) -> Result<()> {
        let upload_response = self.upload(content_type, reader).await?;
        self.set_avatar_url(Some(&upload_response.content_uri))
            .await?;
        Ok(())
    }

    /// Add `EventHandler` to `Client`.
    ///
    /// The methods of `EventHandler` are called when the respective `RoomEvents` occur.
    pub async fn set_event_handler(&self, handler: Box<dyn EventHandler>) {
        self.base_client.set_event_handler(handler).await;
    }

    /// Returns the joined rooms this client knows about.
    pub fn joined_rooms(&self) -> Vec<JoinedRoom> {
        self.store()
            .get_rooms()
            .into_iter()
            .filter_map(|r| r.joined())
            .collect()
    }

    /// Returns the invited rooms this client knows about.
    pub fn invited_rooms(&self) -> Vec<InvitedRoom> {
        self.store()
            .get_rooms()
            .into_iter()
            .filter_map(|r| r.invited())
            .collect()
    }

    /// Returns the left rooms this client knows about.
    pub fn left_rooms(&self) -> Vec<LeftRoom> {
        self.store()
            .get_rooms()
            .into_iter()
            .filter_map(|r| r.left())
            .collect()
    }

    /// Get a joined room with the given room id.
    ///
    /// # Arguments
    ///
    /// `room_id` - The unique id of the room that should be fetched.
    pub fn get_joined_room(&self, room_id: &RoomId) -> Option<JoinedRoom> {
        self.store().get_joined_room(room_id)
    }

    /// Get an invited room with the given room id.
    ///
    /// # Arguments
    ///
    /// `room_id` - The unique id of the room that should be fetched.
    pub fn get_invited_room(&self, room_id: &RoomId) -> Option<InvitedRoom> {
        self.store().get_invited_room(room_id)
    }

    /// Get a left room with the given room id.
    ///
    /// # Arguments
    ///
    /// `room_id` - The unique id of the room that should be fetched.
    pub fn get_left_room(&self, room_id: &RoomId) -> Option<LeftRoom> {
        self.store().get_left_room(room_id)
    }

    /// Login to the server.
    ///
    /// This can be used for the first login as well as for subsequent logins,
    /// note that if the device id isn't provided a new device will be created.
    ///
    /// If this isn't the first login a device id should be provided to restore
    /// the correct stores.
    ///
    /// Alternatively the [`restore_login`] method can be used to restore a
    /// logged in client without the password.
    ///
    /// # Arguments
    ///
    /// * `user` - The user that should be logged in to the homeserver.
    ///
    /// * `password` - The password of the user.
    ///
    /// * `device_id` - A unique id that will be associated with this session. If
    ///     not given the homeserver will create one. Can be an existing
    ///     device_id from a previous login call. Note that this should be done
    ///     only if the client also holds the encryption keys for this device.
    ///
    /// # Example
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// # use matrix_sdk::Client;
    /// # use matrix_sdk::identifiers::DeviceId;
    /// # use matrix_sdk_common::assign;
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    /// let client = Client::new(homeserver).unwrap();
    /// let user = "example";
    /// let response = client
    ///     .login(user, "wordpass", None, Some("My bot")).await
    ///     .unwrap();
    ///
    /// println!("Logged in as {}, got device_id {} and access_token {}",
    ///          user, response.device_id, response.access_token);
    /// # })
    /// ```
    ///
    /// [`restore_login`]: #method.restore_login
    #[instrument(skip(password))]
    pub async fn login(
        &self,
        user: &str,
        password: &str,
        device_id: Option<&str>,
        initial_device_display_name: Option<&str>,
    ) -> Result<login::Response> {
        info!("Logging in to {} as {:?}", self.homeserver, user);

        let request = assign!(
            login::Request::new(
                login::UserInfo::MatrixId(user),
                login::LoginInfo::Password { password },
            ), {
                device_id: device_id.map(|d| d.into()),
                initial_device_display_name,
            }
        );

        let response = self.send(request, None).await?;
        self.base_client.receive_login_response(&response).await?;

        Ok(response)
    }

    /// Restore a previously logged in session.
    ///
    /// This can be used to restore the client to a logged in state, loading all
    /// the stored state and encryption keys.
    ///
    /// Alternatively, if the whole session isn't stored the [`login`] method
    /// can be used with a device id.
    ///
    /// # Arguments
    ///
    /// * `session` - A session that the user already has from a
    /// previous login call.
    ///
    /// [`login`]: #method.login
    pub async fn restore_login(&self, session: Session) -> Result<()> {
        Ok(self.base_client.restore_login(session).await?)
    }

    /// Register a user to the server.
    ///
    /// # Arguments
    ///
    /// * `registration` - The easiest way to create this request is using the `register::Request`
    /// itself.
    ///
    ///
    /// # Examples
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// # use matrix_sdk::Client;
    /// # use matrix_sdk::api::r0::account::register::{Request as RegistrationRequest, RegistrationKind};
    /// # use matrix_sdk::api::r0::uiaa::AuthData;
    /// # use matrix_sdk::identifiers::DeviceId;
    /// # use matrix_sdk_common::assign;
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    ///
    /// let request = assign!(RegistrationRequest::new(), {
    ///     username: Some("user"),
    ///     password: Some("password"),
    ///     auth: Some(AuthData::FallbackAcknowledgement { session: "foobar" }),
    /// });
    /// let client = Client::new(homeserver).unwrap();
    /// client.register(request).await;
    /// # })
    /// ```
    #[instrument(skip(registration))]
    pub async fn register(
        &self,
        registration: impl Into<register::Request<'_>>,
    ) -> Result<register::Response> {
        info!("Registering to {}", self.homeserver);

        let request = registration.into();
        self.send(request, None).await
    }

    /// Get or upload a sync filter.
    pub async fn get_or_upload_filter(
        &self,
        filter_name: &str,
        definition: FilterDefinition<'_>,
    ) -> Result<String> {
        if let Some(filter) = self.base_client.get_filter(filter_name).await? {
            Ok(filter)
        } else {
            let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
            let request = FilterUploadRequest::new(&user_id, definition);
            let response = self.send(request, None).await?;

            self.base_client
                .receive_filter_upload(filter_name, &response)
                .await?;

            Ok(response.filter_id)
        }
    }

    /// Join a room by `RoomId`.
    ///
    /// Returns a `join_room_by_id::Response` consisting of the
    /// joined rooms `RoomId`.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to be joined.
    pub async fn join_room_by_id(&self, room_id: &RoomId) -> Result<join_room_by_id::Response> {
        let request = join_room_by_id::Request::new(room_id);
        self.send(request, None).await
    }

    /// Join a room by `RoomId`.
    ///
    /// Returns a `join_room_by_id_or_alias::Response` consisting of the
    /// joined rooms `RoomId`.
    ///
    /// # Arguments
    ///
    /// * `alias` - The `RoomId` or `RoomAliasId` of the room to be joined.
    /// An alias looks like `#name:example.com`.
    pub async fn join_room_by_id_or_alias(
        &self,
        alias: &RoomIdOrAliasId,
        server_names: &[Box<ServerName>],
    ) -> Result<join_room_by_id_or_alias::Response> {
        let request = assign!(join_room_by_id_or_alias::Request::new(alias), {
            server_name: server_names,
        });
        self.send(request, None).await
    }

    /// Forget a room by `RoomId`.
    ///
    /// Returns a `forget_room::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to be forget.
    pub async fn forget_room_by_id(&self, room_id: &RoomId) -> Result<forget_room::Response> {
        let request = forget_room::Request::new(room_id);
        self.send(request, None).await
    }

    /// Ban a user from a room by `RoomId` and `UserId`.
    ///
    /// Returns a `ban_user::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to ban the user from.
    ///
    /// * `user_id` - The user to ban by `UserId`.
    ///
    /// * `reason` - The reason for banning this user.
    pub async fn ban_user(
        &self,
        room_id: &RoomId,
        user_id: &UserId,
        reason: Option<&str>,
    ) -> Result<ban_user::Response> {
        let request = assign!(ban_user::Request::new(room_id, user_id), { reason });
        self.send(request, None).await
    }

    /// Kick a user out of the specified room.
    ///
    /// Returns a `kick_user::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room the user should be kicked out of.
    ///
    /// * `user_id` - The `UserId` of the user that should be kicked out of the room.
    ///
    /// * `reason` - Optional reason why the room member is being kicked out.
    pub async fn kick_user(
        &self,
        room_id: &RoomId,
        user_id: &UserId,
        reason: Option<&str>,
    ) -> Result<kick_user::Response> {
        let request = assign!(kick_user::Request::new(room_id, user_id), { reason });
        self.send(request, None).await
    }

    /// Leave the specified room.
    ///
    /// Returns a `leave_room::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to leave.
    pub async fn leave_room(&self, room_id: &RoomId) -> Result<leave_room::Response> {
        let request = leave_room::Request::new(room_id);
        self.send(request, None).await
    }

    /// Invite the specified user by `UserId` to the given room.
    ///
    /// Returns a `invite_user::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to invite the specified user to.
    ///
    /// * `user_id` - The `UserId` of the user to invite to the room.
    pub async fn invite_user_by_id(
        &self,
        room_id: &RoomId,
        user_id: &UserId,
    ) -> Result<invite_user::Response> {
        let recipient = InvitationRecipient::UserId { user_id };

        let request = invite_user::Request::new(room_id, recipient);
        self.send(request, None).await
    }

    /// Invite the specified user by third party id to the given room.
    ///
    /// Returns a `invite_user::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` of the room to invite the specified user to.
    ///
    /// * `invite_id` - A third party id of a user to invite to the room.
    pub async fn invite_user_by_3pid(
        &self,
        room_id: &RoomId,
        invite_id: Invite3pid<'_>,
    ) -> Result<invite_user::Response> {
        let recipient = InvitationRecipient::ThirdPartyId(invite_id);
        let request = invite_user::Request::new(room_id, recipient);
        self.send(request, None).await
    }

    /// Search the homeserver's directory of public rooms.
    ///
    /// Sends a request to "_matrix/client/r0/publicRooms", returns
    /// a `get_public_rooms::Response`.
    ///
    /// # Arguments
    ///
    /// * `limit` - The number of `PublicRoomsChunk`s in each response.
    ///
    /// * `since` - Pagination token from a previous request.
    ///
    /// * `server` - The name of the server, if `None` the requested server is used.
    ///
    /// # Examples
    /// ```no_run
    /// use matrix_sdk::Client;
    /// # use std::convert::TryInto;
    /// # use url::Url;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # let limit = Some(10);
    /// # let since = Some("since token");
    /// # let server = Some("servername.com".try_into().unwrap());
    ///
    /// let mut client = Client::new(homeserver).unwrap();
    /// # use futures::executor::block_on;
    /// # block_on(async {
    ///
    /// client.public_rooms(limit, since, server).await;
    /// # });
    /// ```
    pub async fn public_rooms(
        &self,
        limit: Option<u32>,
        since: Option<&str>,
        server: Option<&ServerName>,
    ) -> Result<get_public_rooms::Response> {
        let limit = limit.map(UInt::from);

        let request = assign!(get_public_rooms::Request::new(), {
            limit,
            since,
            server,
        });
        self.send(request, None).await
    }

    /// Search the homeserver's directory of public rooms with a filter.
    ///
    /// Sends a request to "_matrix/client/r0/publicRooms", returns
    /// a `get_public_rooms_filtered::Response`.
    ///
    /// # Arguments
    ///
    /// * `room_search` - The easiest way to create this request is using the
    /// `get_public_rooms_filtered::Request` itself.
    ///
    /// # Examples
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// # use matrix_sdk::Client;
    /// # use matrix_sdk::directory::{Filter, RoomNetwork};
    /// # use matrix_sdk::api::r0::directory::get_public_rooms_filtered::Request as PublicRoomsFilterRequest;
    /// # use matrix_sdk_common::assign;
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # block_on(async {
    /// let mut client = Client::new(homeserver).unwrap();
    ///
    /// let generic_search_term = Some("matrix-rust-sdk");
    /// let filter = assign!(Filter::new(), { generic_search_term });
    /// let request = assign!(PublicRoomsFilterRequest::new(), { filter });
    ///
    /// client.public_rooms_filtered(request).await;
    /// # })
    /// ```
    pub async fn public_rooms_filtered(
        &self,
        room_search: impl Into<get_public_rooms_filtered::Request<'_>>,
    ) -> Result<get_public_rooms_filtered::Response> {
        let request = room_search.into();
        self.send(request, None).await
    }

    /// Create a room using the `RoomBuilder` and send the request.
    ///
    /// Sends a request to `/_matrix/client/r0/createRoom`, returns a `create_room::Response`,
    /// this is an empty response.
    ///
    /// # Arguments
    ///
    /// * `room` - The easiest way to create this request is using the
    /// `create_room::Request` itself.
    ///
    /// # Examples
    /// ```no_run
    /// use matrix_sdk::Client;
    /// # use matrix_sdk::api::r0::room::{create_room::Request as CreateRoomRequest, Visibility};
    /// # use url::Url;
    ///
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// let request = CreateRoomRequest::new();
    /// let client = Client::new(homeserver).unwrap();
    /// # use futures::executor::block_on;
    /// # block_on(async {
    /// assert!(client.create_room(request).await.is_ok());
    /// # });
    /// ```
    pub async fn create_room(
        &self,
        room: impl Into<create_room::Request<'_>>,
    ) -> Result<create_room::Response> {
        let request = room.into();
        self.send(request, None).await
    }

    /// Sends a request to `/_matrix/client/r0/rooms/{room_id}/messages` and returns
    /// a `get_message_events::Response` that contains a chunk of room and state events
    /// (`AnyRoomEvent` and `AnyStateEvent`).
    ///
    /// # Arguments
    ///
    /// * `request` - The easiest way to create this request is using the
    /// `get_message_events::Request` itself.
    ///
    /// # Examples
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// use matrix_sdk::Client;
    /// # use matrix_sdk::identifiers::room_id;
    /// # use matrix_sdk::api::r0::filter::RoomEventFilter;
    /// # use matrix_sdk::api::r0::message::get_message_events::Request as MessagesRequest;
    /// # use url::Url;
    ///
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// let room_id = room_id!("!roomid:example.com");
    /// let request = MessagesRequest::backward(&room_id, "t47429-4392820_219380_26003_2265");
    ///
    /// let mut client = Client::new(homeserver).unwrap();
    /// # use futures::executor::block_on;
    /// # block_on(async {
    /// assert!(client.room_messages(request).await.is_ok());
    /// # });
    /// ```
    pub async fn room_messages(
        &self,
        request: impl Into<get_message_events::Request<'_>>,
    ) -> Result<get_message_events::Response> {
        let request = request.into();
        self.send(request, None).await
    }

    /// Send a request to notify the room of a user typing.
    ///
    /// Returns a `create_typing_event::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` the user is typing in.
    ///
    /// * `typing` - Whether the user is typing, and how long.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// # use std::time::Duration;
    /// # use matrix_sdk::{
    /// #     Client, SyncSettings,
    /// #     api::r0::typing::create_typing_event::Typing,
    /// #     identifiers::room_id,
    /// # };
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// # let room_id = room_id!("!test:localhost");
    /// let response = client
    ///     .typing_notice(&room_id, Typing::Yes(Duration::from_secs(4)))
    ///     .await
    ///     .expect("Can't get devices from server");
    /// # });
    ///
    /// ```
    pub async fn typing_notice(
        &self,
        room_id: &RoomId,
        typing: impl Into<Typing>,
    ) -> Result<TypingResponse> {
        let user_id = self.user_id().await.ok_or(Error::AuthenticationRequired)?;
        let request = TypingRequest::new(&user_id, room_id, typing.into());

        self.send(request, None).await
    }

    /// Send a request to notify the room the user has read specific event.
    ///
    /// Returns a `create_receipt::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The `RoomId` the user is currently in.
    ///
    /// * `event_id` - The `EventId` specifies the event to set the read receipt on.
    pub async fn read_receipt(
        &self,
        room_id: &RoomId,
        event_id: &EventId,
    ) -> Result<create_receipt::Response> {
        let request =
            create_receipt::Request::new(room_id, create_receipt::ReceiptType::Read, event_id);
        self.send(request, None).await
    }

    /// Send a request to notify the room user has read up to specific event.
    ///
    /// Returns a `set_read_marker::Response`, an empty response.
    ///
    /// # Arguments
    ///
    /// * room_id - The `RoomId` the user is currently in.
    ///
    /// * fully_read - The `EventId` of the event the user has read to.
    ///
    /// * read_receipt - An `EventId` to specify the event to set the read receipt on.
    pub async fn read_marker(
        &self,
        room_id: &RoomId,
        fully_read: &EventId,
        read_receipt: Option<&EventId>,
    ) -> Result<set_read_marker::Response> {
        let request = assign!(set_read_marker::Request::new(room_id, fully_read), {
            read_receipt
        });
        self.send(request, None).await
    }

    /// Share a group session for the given room.
    ///
    /// This will create Olm sessions with all the users/device pairs in the
    /// room if necessary and share a group session with them.
    ///
    /// Does nothing if no group session needs to be shared.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    async fn preshare_group_session(&self, room_id: &RoomId) -> Result<()> {
        // TODO expose this publicly so people can pre-share a group session if
        // e.g. a user starts to type a message for a room.
        #[allow(clippy::map_clone)]
        if let Some(mutex) = self.group_session_locks.get(room_id).map(|m| m.clone()) {
            // If a group session share request is already going on,
            // await the release of the lock.
            mutex.lock().await;
        } else {
            // Otherwise create a new lock and share the group
            // session.
            let mutex = Arc::new(Mutex::new(()));
            self.group_session_locks
                .insert(room_id.clone(), mutex.clone());

            let _guard = mutex.lock().await;

            {
                let joined = self.store().get_joined_user_ids(room_id).await?;
                let invited = self.store().get_invited_user_ids(room_id).await?;
                let members = joined.iter().chain(&invited);
                self.claim_one_time_keys(members).await?;
            };

            let response = self.share_group_session(room_id).await;

            self.group_session_locks.remove(room_id);

            // If one of the responses failed invalidate the group
            // session as using it would end up in undecryptable
            // messages.
            if let Err(r) = response {
                self.base_client.invalidate_group_session(room_id).await;
                return Err(r);
            }
        }

        Ok(())
    }

    #[cfg(feature = "encryption")]
    pub(crate) async fn room_send_helper(
        &self,
        request: &RoomMessageRequest,
    ) -> Result<send_message_event::Response> {
        let content = request.content.clone();
        let txn_id = request.txn_id;
        let room_id = &request.room_id;

        self.room_send(&room_id, content, Some(txn_id)).await
    }

    /// Send a room message to the homeserver.
    ///
    /// Returns the parsed response from the server.
    ///
    /// If the encryption feature is enabled this method will transparently
    /// encrypt the room message if the given room is encrypted.
    ///
    /// # Arguments
    ///
    /// * `room_id` -  The id of the room that should receive the message.
    ///
    /// * `content` - The content of the message event.
    ///
    /// * `txn_id` - A unique `Uuid` that can be attached to a `MessageEvent`
    /// held in its unsigned field as `transaction_id`. If not given one is
    /// created for the message.
    ///
    /// # Example
    /// ```no_run
    /// # use std::sync::{Arc, RwLock};
    /// # use matrix_sdk::{Client, SyncSettings};
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # use matrix_sdk::identifiers::room_id;
    /// # use std::convert::TryFrom;
    /// use matrix_sdk::events::{
    ///     AnyMessageEventContent,
    ///     room::message::{MessageEventContent, TextMessageEventContent},
    /// };
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// # let room_id = room_id!("!test:localhost");
    /// use matrix_sdk_common::uuid::Uuid;
    ///
    /// let content = AnyMessageEventContent::RoomMessage(
    ///     MessageEventContent::Text(TextMessageEventContent::plain("Hello world"))
    /// );
    ///
    /// let txn_id = Uuid::new_v4();
    /// client.room_send(&room_id, content, Some(txn_id)).await.unwrap();
    /// # })
    /// ```
    pub async fn room_send(
        &self,
        room_id: &RoomId,
        content: impl Into<AnyMessageEventContent>,
        txn_id: Option<Uuid>,
    ) -> Result<send_message_event::Response> {
        #[cfg(not(feature = "encryption"))]
        let content: AnyMessageEventContent = content.into();

        #[cfg(feature = "encryption")]
        let content = if self.is_room_encrypted(room_id).await {
            if !self.are_members_synced(room_id).await {
                self.room_members(room_id).await?;
                // TODO query keys here?
            }

            self.preshare_group_session(room_id).await?;
            AnyMessageEventContent::RoomEncrypted(self.base_client.encrypt(room_id, content).await?)
        } else {
            content.into()
        };

        let txn_id = txn_id.unwrap_or_else(Uuid::new_v4).to_string();
        let request = send_message_event::Request::new(&room_id, &txn_id, &content);

        let response = self.send(request, None).await?;
        Ok(response)
    }

    /// Check if the given room is encrypted.
    ///
    /// Returns true if a room with the given id was found and the room is
    /// encrypted, false if the room wasn't found or isn't encrypted.
    async fn is_room_encrypted(&self, room_id: &RoomId) -> bool {
        self.base_client
            .get_room(room_id)
            .map(|r| r.is_encrypted())
            .unwrap_or(false)
    }

    #[cfg(feature = "encryption")]
    async fn are_members_synced(&self, room_id: &RoomId) -> bool {
        self.base_client
            .get_room(room_id)
            .map(|r| r.are_members_synced())
            .unwrap_or(true)
    }

    /// Send an attachment to a room.
    ///
    /// This will upload the given data that the reader produces using the
    /// [`upload()`](#method.upload) method and post an event to the given room.
    /// If the room is encrypted and the encryption feature is enabled the
    /// upload will be encrypted.
    ///
    /// This is a convenience method that calls the [`upload()`](#method.upload)
    /// and afterwards the [`room_send()`](#method.room_send).
    ///
    /// # Arguments
    /// * `room_id` -  The id of the room that should receive the media event.
    ///
    /// * `body` - A textual representation of the media that is going to be
    /// uploaded. Usually the file name.
    ///
    /// * `content_type` - The type of the media, this will be used as the
    /// content-type header.
    ///
    /// * `reader` - A `Reader` that will be used to fetch the raw bytes of the
    /// media.
    ///
    /// * `txn_id` - A unique `Uuid` that can be attached to a `MessageEvent`
    /// held in its unsigned field as `transaction_id`. If not given one is
    /// created for the message.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// # use std::{path::PathBuf, fs::File, io::Read};
    /// # use matrix_sdk::{Client, identifiers::room_id};
    /// # use url::Url;
    /// # use mime;
    /// # use futures::executor::block_on;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// # let room_id = room_id!("!test:localhost");
    /// let path = PathBuf::from("/home/example/my-cat.jpg");
    /// let mut image = File::open(path).unwrap();
    ///
    /// let response = client
    ///     .room_send_attachment(&room_id, "My favorite cat", &mime::IMAGE_JPEG, &mut image, None)
    ///     .await
    ///     .expect("Can't upload my cat.");
    /// # });
    /// ```
    pub async fn room_send_attachment<R: Read>(
        &self,
        room_id: &RoomId,
        body: &str,
        content_type: &Mime,
        mut reader: &mut R,
        txn_id: Option<Uuid>,
    ) -> Result<send_message_event::Response> {
        let (response, encrypted_file) = if self.is_room_encrypted(room_id).await {
            #[cfg(feature = "encryption")]
            let mut reader = AttachmentEncryptor::new(reader);
            #[cfg(feature = "encryption")]
            let content_type = mime::APPLICATION_OCTET_STREAM;

            let response = self.upload(&content_type, &mut reader).await?;

            #[cfg(feature = "encryption")]
            let keys = {
                let keys = reader.finish();
                Some(Box::new(EncryptedFile {
                    url: response.content_uri.clone(),
                    key: keys.web_key,
                    iv: keys.iv,
                    hashes: keys.hashes,
                    v: keys.version,
                }))
            };
            #[cfg(not(feature = "encryption"))]
            let keys: Option<Box<EncryptedFile>> = None;

            (response, keys)
        } else {
            let response = self.upload(&content_type, &mut reader).await?;
            (response, None)
        };

        let url = response.content_uri;

        let content = match content_type.type_() {
            mime::IMAGE => {
                // TODO create a thumbnail using the image crate?.
                MessageEventContent::Image(ImageMessageEventContent {
                    body: body.to_owned(),
                    info: None,
                    url: Some(url),
                    file: encrypted_file,
                })
            }
            mime::AUDIO => MessageEventContent::Audio(AudioMessageEventContent {
                body: body.to_owned(),
                info: None,
                url: Some(url),
                file: encrypted_file,
            }),
            mime::VIDEO => MessageEventContent::Video(VideoMessageEventContent {
                body: body.to_owned(),
                info: None,
                url: Some(url),
                file: encrypted_file,
            }),
            _ => MessageEventContent::File(FileMessageEventContent {
                filename: None,
                body: body.to_owned(),
                info: None,
                url: Some(url),
                file: encrypted_file,
            }),
        };

        self.room_send(
            room_id,
            AnyMessageEventContent::RoomMessage(content),
            txn_id,
        )
        .await
    }

    /// Upload some media to the server.
    ///
    /// # Arguments
    ///
    /// * `content_type` - The type of the media, this will be used as the
    /// content-type header.
    ///
    /// * `reader` - A `Reader` that will be used to fetch the raw bytes of the
    /// media.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// # use std::{path::PathBuf, fs::File, io::Read};
    /// # use matrix_sdk::{Client, identifiers::room_id};
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # use mime;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// let path = PathBuf::from("/home/example/my-cat.jpg");
    /// let mut image = File::open(path).unwrap();
    ///
    /// let response = client
    ///     .upload(&mime::IMAGE_JPEG, &mut image)
    ///     .await
    ///     .expect("Can't upload my cat.");
    ///
    /// println!("Cat URI: {}", response.content_uri);
    /// # });
    /// ```
    pub async fn upload(
        &self,
        content_type: &Mime,
        reader: &mut impl Read,
    ) -> Result<create_content::Response> {
        let mut data = Vec::new();
        reader.read_to_end(&mut data)?;

        let timeout = std::cmp::max(
            Duration::from_secs(data.len() as u64 / DEFAULT_UPLOAD_SPEED),
            MIN_UPLOAD_REQUEST_TIMEOUT,
        );

        let request = assign!(create_content::Request::new(data), {
            content_type: Some(content_type.essence_str()),
        });

        Ok(self.http_client.upload(request, Some(timeout)).await?)
    }

    /// Send an arbitrary request to the server, without updating client state.
    ///
    /// **Warning:** Because this method *does not* update the client state, it is
    /// important to make sure than you account for this yourself, and use wrapper methods
    /// where available.  This method should *only* be used if a wrapper method for the
    /// endpoint you'd like to use is not available.
    ///
    /// # Arguments
    ///
    /// * `request` - A filled out and valid request for the endpoint to be hit
    ///
    /// * `timeout` - An optional request timeout setting, this overrides the
    /// default request setting if one was set.
    ///
    /// # Example
    ///
    /// ```no_run
    /// # use matrix_sdk::{Client, SyncSettings};
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # use std::convert::TryFrom;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// use matrix_sdk::api::r0::profile;
    /// use matrix_sdk::identifiers::user_id;
    ///
    /// // First construct the request you want to make
    /// // See https://docs.rs/ruma-client-api/latest/ruma_client_api/index.html
    /// // for all available Endpoints
    /// let user_id = user_id!("@example:localhost");
    /// let request = profile::get_profile::Request::new(&user_id);
    ///
    /// // Start the request using Client::send()
    /// let response = client.send(request, None).await.unwrap();
    ///
    /// // Check the corresponding Response struct to find out what types are
    /// // returned
    /// # })
    /// ```
    pub async fn send<Request>(
        &self,
        request: Request,
        timeout: Option<Duration>,
    ) -> Result<Request::IncomingResponse>
    where
        Request: OutgoingRequest + Debug,
        HttpError: From<FromHttpResponseError<Request::EndpointError>>,
    {
        Ok(self.http_client.send(request, timeout).await?)
    }

    #[cfg(feature = "encryption")]
    pub(crate) async fn send_to_device(
        &self,
        request: &ToDeviceRequest,
    ) -> Result<ToDeviceResponse> {
        let txn_id_string = request.txn_id_string();
        let request = RumaToDeviceRequest::new(
            request.event_type.clone(),
            &txn_id_string,
            request.messages.clone(),
        );

        self.send(request, None).await
    }

    /// Get information of all our own devices.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// # use matrix_sdk::{Client, SyncSettings};
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # use std::convert::TryFrom;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// let response = client.devices().await.expect("Can't get devices from server");
    ///
    /// for device in response.devices {
    ///     println!(
    ///         "Device: {} {}",
    ///         device.device_id,
    ///         device.display_name.as_deref().unwrap_or("")
    ///     );
    /// }
    /// # });
    /// ```
    pub async fn devices(&self) -> Result<get_devices::Response> {
        let request = get_devices::Request::new();

        self.send(request, None).await
    }

    /// Delete the given devices from the server.
    ///
    /// # Arguments
    ///
    /// * `devices` - The list of devices that should be deleted from the
    /// server.
    ///
    /// * `auth_data` - This request requires user interactive auth, the first
    /// request needs to set this to `None` and will always fail with an
    /// `UiaaResponse`. The response will contain information for the
    /// interactive auth and the same request needs to be made but this time
    /// with some `auth_data` provided.
    ///
    /// ```no_run
    /// # use matrix_sdk::{
    /// #    api::r0::uiaa::{UiaaResponse, AuthData},
    /// #    Client, SyncSettings, Error, FromHttpResponseError, ServerError,
    /// # };
    /// # use futures::executor::block_on;
    /// # use serde_json::json;
    /// # use url::Url;
    /// # use std::{collections::BTreeMap, convert::TryFrom};
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// let devices = &["DEVICEID".into()];
    ///
    /// if let Err(e) = client.delete_devices(devices, None).await {
    ///     if let Some(info) = e.uiaa_response() {
    ///         let mut auth_parameters = BTreeMap::new();
    ///
    ///         let identifier = json!({
    ///             "type": "m.id.user",
    ///             "user": "example",
    ///         });
    ///         auth_parameters.insert("identifier".to_owned(), identifier);
    ///         auth_parameters.insert("password".to_owned(), "wordpass".into());
    ///
    ///         // This is needed because of https://github.com/matrix-org/synapse/issues/5665
    ///         auth_parameters.insert("user".to_owned(), "@example:localhost".into());
    ///
    ///         let auth_data = AuthData::DirectRequest {
    ///             kind: "m.login.password",
    ///             auth_parameters,
    ///             session: info.session.as_deref(),
    ///         };
    ///
    ///         client
    ///             .delete_devices(devices, Some(auth_data))
    ///             .await
    ///             .expect("Can't delete devices");
    ///     }
    /// }
    /// # });
    pub async fn delete_devices(
        &self,
        devices: &[DeviceIdBox],
        auth_data: Option<AuthData<'_>>,
    ) -> Result<delete_devices::Response> {
        let mut request = delete_devices::Request::new(devices);
        request.auth = auth_data;

        self.send(request, None).await
    }

    /// Get the room members for the given room.
    pub async fn room_members(&self, room_id: &RoomId) -> Result<MembersResponse> {
        let request = get_member_events::Request::new(room_id);
        let response = self.send(request, None).await?;

        Ok(self.base_client.receive_members(room_id, &response).await?)
    }

    /// Synchronize the client's state with the latest state on the server.
    ///
    /// **Note**: You should not use this method to repeatedly sync if encryption
    /// support is enabled, the [`sync`] method will make additional
    /// requests between syncs that are needed for E2E encryption to work.
    ///
    /// # Arguments
    ///
    /// * `sync_settings` - Settings for the sync call.
    ///
    /// [`sync`]: #method.sync
    #[instrument]
    pub async fn sync_once(&self, sync_settings: SyncSettings<'_>) -> Result<SyncResponse> {
        let request = assign!(sync_events::Request::new(), {
            filter: sync_settings.filter.as_ref(),
            since: sync_settings.token.as_deref(),
            full_state: sync_settings.full_state,
            set_presence: &PresenceState::Online,
            timeout: sync_settings.timeout,
        });

        let timeout = sync_settings
            .timeout
            .unwrap_or_else(|| Duration::from_secs(0))
            + SYNC_REQUEST_TIMEOUT;

        let response = self.send(request, Some(timeout)).await?;

        Ok(self.base_client.receive_sync_response(response).await?)
    }

    /// Repeatedly call sync to synchronize the client state with the server.
    ///
    /// This method will never return, if cancellation is needed the method
    /// should be wrapped in a cancelable task or the [`sync_with_callback`]
    /// method can be used.
    ///
    /// # Arguments
    ///
    /// * `sync_settings` - Settings for the sync call. Note that those settings
    ///     will be only used for the first sync call.
    ///
    /// [`sync_with_callback`]: #method.sync_with_callback
    pub async fn sync(&self, sync_settings: SyncSettings<'_>) {
        self.sync_with_callback(sync_settings, |_| async { LoopCtrl::Continue })
            .await
    }

    /// Repeatedly call sync to synchronize the client state with the server.
    ///
    /// # Arguments
    ///
    /// * `sync_settings` - Settings for the sync call. Note that those settings
    ///     will be only used for the first sync call.
    ///
    /// * `callback` - A callback that will be called every time a successful
    ///     response has been fetched from the server. The callback must return
    ///     a boolean which signalizes if the method should stop syncing. If the
    ///     callback returns `LoopCtrl::Continue` the sync will continue, if the
    ///     callback returns `LoopCtrl::Break` the sync will be stopped.
    ///
    /// # Examples
    ///
    /// The following example demonstrates how to sync forever while sending all
    /// the interesting events through a mpsc channel to another thread e.g. a
    /// UI thread.
    ///
    /// ```no_run
    /// # use matrix_sdk::events::{
    /// #     room::message::{MessageEvent, MessageEventContent, TextMessageEventContent},
    /// # };
    /// # use std::sync::{Arc, RwLock};
    /// # use std::time::Duration;
    /// # use matrix_sdk::{Client, SyncSettings, LoopCtrl};
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    ///
    /// use tokio::sync::mpsc::channel;
    ///
    /// let (tx, rx) = channel(100);
    ///
    /// let sync_channel = &tx;
    /// let sync_settings = SyncSettings::new()
    ///     .timeout(Duration::from_secs(30));
    ///
    /// client
    ///     .sync_with_callback(sync_settings, |response| async move {
    ///         let channel = sync_channel;
    ///
    ///         for (room_id, room) in response.rooms.join {
    ///             for event in room.timeline.events {
    ///                 channel.send(event).await.unwrap();
    ///             }
    ///         }
    ///
    ///         LoopCtrl::Continue
    ///     })
    ///     .await;
    /// })
    /// ```
    #[instrument(skip(callback))]
    pub async fn sync_with_callback<C>(
        &self,
        mut sync_settings: SyncSettings<'_>,
        callback: impl Fn(SyncResponse) -> C,
    ) where
        C: Future<Output = LoopCtrl>,
    {
        let mut last_sync_time: Option<Instant> = None;

        if sync_settings.token.is_none() {
            sync_settings.token = self.sync_token().await;
        }

        loop {
            let filter = sync_settings.filter.clone();
            let response = self.sync_once(sync_settings.clone()).await;

            let response = match response {
                Ok(r) => r,
                Err(e) => {
                    error!("Received an invalid response: {}", e);
                    sleep::new(Duration::from_secs(1)).await;
                    continue;
                }
            };

            #[cfg(feature = "encryption")]
            {
                // This is needed because sometimes we need to automatically
                // claim some one-time keys to unwedge an exisitng Olm session.
                if let Err(e) = self.claim_one_time_keys([].iter()).await {
                    warn!("Error while claiming one-time keys {:?}", e);
                }

                for r in self.base_client.outgoing_requests().await {
                    match r.request() {
                        OutgoingRequests::KeysQuery(request) => {
                            if let Err(e) = self
                                .keys_query(r.request_id(), request.device_keys.clone())
                                .await
                            {
                                warn!("Error while querying device keys {:?}", e);
                            }
                        }
                        OutgoingRequests::KeysUpload(request) => {
                            if let Err(e) = self.keys_upload(&r.request_id(), request).await {
                                warn!("Error while querying device keys {:?}", e);
                            }
                        }
                        OutgoingRequests::ToDeviceRequest(request) => {
                            // TODO remove this unwrap
                            if let Ok(resp) = self.send_to_device(&request).await {
                                self.base_client
                                    .mark_request_as_sent(&r.request_id(), &resp)
                                    .await
                                    .unwrap();
                            }
                        }
                        OutgoingRequests::SignatureUpload(request) => {
                            // TODO remove this unwrap.
                            if let Ok(resp) = self.send(request.clone(), None).await {
                                self.base_client
                                    .mark_request_as_sent(&r.request_id(), &resp)
                                    .await
                                    .unwrap();
                            }
                        }
                        OutgoingRequests::RoomMessage(request) => {
                            if let Ok(resp) = self.room_send_helper(request).await {
                                self.base_client
                                    .mark_request_as_sent(&r.request_id(), &resp)
                                    .await
                                    .unwrap();
                            }
                        }
                    }
                }
            }

            if callback(response).await == LoopCtrl::Break {
                return;
            }

            let now = Instant::now();

            // If the last sync happened less than a second ago, sleep for a
            // while to not hammer out requests if the server doesn't respect
            // the sync timeout.
            if let Some(t) = last_sync_time {
                if now - t <= Duration::from_secs(1) {
                    sleep::new(Duration::from_secs(1)).await;
                }
            }

            last_sync_time = Some(now);

            sync_settings = SyncSettings::new().timeout(DEFAULT_SYNC_TIMEOUT).token(
                self.sync_token()
                    .await
                    .expect("No sync token found after initial sync"),
            );
            if let Some(f) = filter {
                sync_settings = sync_settings.filter(f);
            }
        }
    }

    /// Claim one-time keys creating new Olm sessions.
    ///
    /// # Arguments
    ///
    /// * `users` - The list of user/device pairs that we should claim keys for.
    ///
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    #[instrument(skip(users))]
    async fn claim_one_time_keys(&self, users: impl Iterator<Item = &UserId>) -> Result<()> {
        let _lock = self.key_claim_lock.lock().await;

        if let Some((request_id, request)) = self.base_client.get_missing_sessions(users).await? {
            let response = self.send(request, None).await?;
            self.base_client
                .mark_request_as_sent(&request_id, &response)
                .await?;
        }

        Ok(())
    }

    /// Share a group session for a room.
    ///
    /// # Arguments
    ///
    /// * `room_id` - The ID of the room for which we want to share a group
    /// session.
    ///
    /// # Panics
    ///
    /// Panics if the client isn't logged in.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    #[instrument]
    async fn share_group_session(&self, room_id: &RoomId) -> Result<()> {
        let mut requests = self.base_client.share_group_session(room_id).await?;

        for request in requests.drain(..) {
            let response = self.send_to_device(&request).await?;

            self.base_client
                .mark_request_as_sent(&request.txn_id, &response)
                .await?;
        }

        Ok(())
    }

    /// Upload the E2E encryption keys.
    ///
    /// This uploads the long lived device keys as well as the required amount
    /// of one-time keys.
    ///
    /// # Panics
    ///
    /// Panics if the client isn't logged in, or if no encryption keys need to
    /// be uploaded.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    #[instrument]
    async fn keys_upload(
        &self,
        request_id: &Uuid,
        request: &upload_keys::Request,
    ) -> Result<upload_keys::Response> {
        debug!(
            "Uploading encryption keys device keys: {}, one-time-keys: {}",
            request.device_keys.is_some(),
            request.one_time_keys.as_ref().map_or(0, |k| k.len())
        );

        let response = self.send(request.clone(), None).await?;
        self.base_client
            .mark_request_as_sent(request_id, &response)
            .await?;

        Ok(response)
    }

    /// Get the current, if any, sync token of the client.
    /// This will be None if the client didn't sync at least once.
    pub async fn sync_token(&self) -> Option<String> {
        self.base_client.sync_token().await
    }

    /// Query the server for users device keys.
    ///
    /// # Panics
    ///
    /// Panics if no key query needs to be done.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    #[instrument]
    async fn keys_query(
        &self,
        request_id: &Uuid,
        device_keys: BTreeMap<UserId, Vec<DeviceIdBox>>,
    ) -> Result<get_keys::Response> {
        let request = assign!(get_keys::Request::new(), { device_keys });

        let response = self.send(request, None).await?;
        self.base_client
            .mark_request_as_sent(request_id, &response)
            .await?;

        Ok(response)
    }

    /// Get a `Sas` verification object with the given flow id.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    pub async fn get_verification(&self, flow_id: &str) -> Option<Sas> {
        self.base_client
            .get_verification(flow_id)
            .await
            .map(|sas| Sas {
                inner: sas,
                client: self.clone(),
            })
    }

    /// Get a `VerificationRequest` object with the given flow id.
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    pub async fn get_verification_request(&self, flow_id: &EventId) -> Option<VerificationRequest> {
        let olm = self.base_client.olm_machine().await?;

        olm.get_verification_request(flow_id)
            .map(|r| VerificationRequest {
                inner: r,
                client: self.clone(),
            })
    }

    /// Get a specific device of a user.
    ///
    /// # Arguments
    ///
    /// * `user_id` - The unique id of the user that the device belongs to.
    ///
    /// * `device_id` - The unique id of the device.
    ///
    /// Returns a `Device` if one is found and the crypto store didn't throw an
    /// error.
    ///
    /// This will always return None if the client hasn't been logged in.
    ///
    /// # Example
    ///
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// # use matrix_sdk::{Client, identifiers::UserId};
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # let alice = UserId::try_from("@alice:example.org").unwrap();
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # let client = Client::new(homeserver).unwrap();
    /// # block_on(async {
    /// let device = client.get_device(&alice, "DEVICEID".into())
    ///     .await
    ///     .unwrap()
    ///     .unwrap();
    ///
    /// println!("{:?}", device.is_trusted());
    ///
    /// let verification = device.start_verification().await.unwrap();
    /// # });
    /// ```
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    pub async fn get_device(
        &self,
        user_id: &UserId,
        device_id: &DeviceId,
    ) -> StdResult<Option<Device>, CryptoStoreError> {
        let device = self.base_client.get_device(user_id, device_id).await?;

        Ok(device.map(|d| Device {
            inner: d,
            client: self.clone(),
        }))
    }

    /// Create and upload a new cross signing identity.
    ///
    /// # Arguments
    ///
    /// * `auth_data` - This request requires user interactive auth, the first
    /// request needs to set this to `None` and will always fail with an
    /// `UiaaResponse`. The response will contain information for the
    /// interactive auth and the same request needs to be made but this time
    /// with some `auth_data` provided.
    ///
    /// # Examples
    /// ```no_run
    /// # use std::{convert::TryFrom, collections::BTreeMap};
    /// # use matrix_sdk::{Client, identifiers::UserId};
    /// # use matrix_sdk::api::r0::uiaa::AuthData;
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # use serde_json::json;
    /// # let user_id = UserId::try_from("@alice:example.org").unwrap();
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # let client = Client::new(homeserver).unwrap();
    /// # block_on(async {
    ///
    /// fn auth_data<'a>(user: &UserId, password: &str, session: Option<&'a str>) -> AuthData<'a> {
    ///     let mut auth_parameters = BTreeMap::new();
    ///     let identifier = json!({
    ///         "type": "m.id.user",
    ///         "user": user,
    ///     });
    ///     auth_parameters.insert("identifier".to_owned(), identifier);
    ///     auth_parameters.insert("password".to_owned(), password.to_owned().into());
    ///     // This is needed because of https://github.com/matrix-org/synapse/issues/5665
    ///     auth_parameters.insert("user".to_owned(), user.as_str().into());
    ///     AuthData::DirectRequest {
    ///         kind: "m.login.password",
    ///         auth_parameters,
    ///         session,
    ///     }
    /// }
    ///
    /// if let Err(e) = client.bootstrap_cross_signing(None).await {
    ///     if let Some(response) = e.uiaa_response() {
    ///         let auth_data = auth_data(&user_id, "wordpass", response.session.as_deref());
    ///            client
    ///                .bootstrap_cross_signing(Some(auth_data))
    ///                .await
    ///                .expect("Couldn't bootstrap cross signing")
    ///     } else {
    ///         panic!("Error durign cross signing bootstrap {:#?}", e);
    ///     }
    /// }
    /// # })
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    pub async fn bootstrap_cross_signing(&self, auth_data: Option<AuthData<'_>>) -> Result<()> {
        let olm = self
            .base_client
            .olm_machine()
            .await
            .ok_or(Error::AuthenticationRequired)?;

        let (request, signature_request) = olm.bootstrap_cross_signing(false).await?;

        let request = assign!(UploadSigningKeysRequest::new(), {
            auth: auth_data,
            master_key: request.master_key,
            self_signing_key: request.self_signing_key,
            user_signing_key: request.user_signing_key,
        });

        self.send(request, None).await?;
        self.send(signature_request, None).await?;

        Ok(())
    }

    /// Get a map holding all the devices of an user.
    ///
    /// This will always return an empty map if the client hasn't been logged
    /// in.
    ///
    /// # Arguments
    ///
    /// * `user_id` - The unique id of the user that the devices belong to.
    ///
    /// # Example
    ///
    /// ```no_run
    /// # use std::convert::TryFrom;
    /// # use matrix_sdk::{Client, identifiers::UserId};
    /// # use url::Url;
    /// # use futures::executor::block_on;
    /// # let alice = UserId::try_from("@alice:example.org").unwrap();
    /// # let homeserver = Url::parse("http://example.com").unwrap();
    /// # let client = Client::new(homeserver).unwrap();
    /// # block_on(async {
    /// let devices = client.get_user_devices(&alice).await.unwrap();
    ///
    /// for device in devices.devices() {
    ///     println!("{:?}", device);
    /// }
    /// # });
    /// ```
    #[cfg(feature = "encryption")]
    #[cfg_attr(feature = "docs", doc(cfg(encryption)))]
    pub async fn get_user_devices(
        &self,
        user_id: &UserId,
    ) -> StdResult<UserDevices, CryptoStoreError> {
        let devices = self.base_client.get_user_devices(user_id).await?;

        Ok(UserDevices {
            inner: devices,
            client: self.clone(),
        })
    }

    /// Export E2EE keys that match the given predicate encrypting them with the
    /// given passphrase.
    ///
    /// # Arguments
    ///
    /// * `path` - The file path where the exported key file will be saved.
    ///
    /// * `passphrase` - The passphrase that will be used to encrypt the exported
    /// room keys.
    ///
    /// * `predicate` - A closure that will be called for every known
    /// `InboundGroupSession`, which represents a room key. If the closure
    /// returns `true` the `InboundGroupSessoin` will be included in the export,
    /// if the closure returns `false` it will not be included.
    ///
    /// # Panics
    ///
    /// This method will panic if it isn't run on a Tokio runtime.
    ///
    /// This method will panic if it can't get enough randomness from the OS to
    /// encrypt the exported keys securely.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// # use std::{path::PathBuf, time::Duration};
    /// # use matrix_sdk::{
    /// #     Client, SyncSettings,
    /// #     api::r0::typing::create_typing_event::Typing,
    /// #     identifiers::room_id,
    /// # };
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// let path = PathBuf::from("/home/example/e2e-keys.txt");
    /// // Export all room keys.
    /// client
    ///     .export_keys(path, "secret-passphrase", |_| true)
    ///     .await
    ///     .expect("Can't export keys.");
    ///
    /// // Export only the room keys for a certain room.
    /// let path = PathBuf::from("/home/example/e2e-room-keys.txt");
    /// let room_id = room_id!("!test:localhost");
    ///
    /// client
    ///     .export_keys(path, "secret-passphrase", |s| s.room_id() == &room_id)
    ///     .await
    ///     .expect("Can't export keys.");
    /// # });
    /// ```
    #[cfg(feature = "encryption")]
    #[cfg(not(target_arch = "wasm32"))]
    #[cfg_attr(
        feature = "docs",
        doc(cfg(all(encryption, not(target_arch = "wasm32"))))
    )]
    pub async fn export_keys(
        &self,
        path: PathBuf,
        passphrase: &str,
        predicate: impl FnMut(&InboundGroupSession) -> bool,
    ) -> Result<()> {
        let olm = self
            .base_client
            .olm_machine()
            .await
            .ok_or(Error::AuthenticationRequired)?;

        let keys = olm.export_keys(predicate).await?;
        let passphrase = Zeroizing::new(passphrase.to_owned());

        let encrypt = move || -> Result<()> {
            let export: String = encrypt_key_export(&keys, &passphrase, 500_000)?;
            let mut file = std::fs::File::create(path)?;
            file.write_all(&export.into_bytes())?;
            Ok(())
        };

        let task = tokio::task::spawn_blocking(encrypt);
        task.await.expect("Task join error")
    }

    /// Import E2EE keys from the given file path.
    ///
    /// # Arguments
    ///
    /// * `path` - The file path where the exported key file will can be found.
    ///
    /// * `passphrase` - The passphrase that should be used to decrypt the
    /// exported room keys.
    ///
    /// Returns a tuple of numbers that represent the number of sessions that
    /// were imported and the total number of sessions that were found in the
    /// key export.
    ///
    /// # Panics
    ///
    /// This method will panic if it isn't run on a Tokio runtime.
    ///
    /// ```no_run
    /// # use std::{path::PathBuf, time::Duration};
    /// # use matrix_sdk::{
    /// #     Client, SyncSettings,
    /// #     api::r0::typing::create_typing_event::Typing,
    /// #     identifiers::room_id,
    /// # };
    /// # use futures::executor::block_on;
    /// # use url::Url;
    /// # block_on(async {
    /// # let homeserver = Url::parse("http://localhost:8080").unwrap();
    /// # let mut client = Client::new(homeserver).unwrap();
    /// let path = PathBuf::from("/home/example/e2e-keys.txt");
    /// client
    ///     .import_keys(path, "secret-passphrase")
    ///     .await
    ///     .expect("Can't import keys");
    /// # });
    /// ```
    #[cfg(feature = "encryption")]
    #[cfg(not(target_arch = "wasm32"))]
    #[cfg_attr(
        feature = "docs",
        doc(cfg(all(encryption, not(target_arch = "wasm32"))))
    )]
    pub async fn import_keys(&self, path: PathBuf, passphrase: &str) -> Result<(usize, usize)> {
        let olm = self
            .base_client
            .olm_machine()
            .await
            .ok_or(Error::AuthenticationRequired)?;
        let passphrase = Zeroizing::new(passphrase.to_owned());

        let decrypt = move || {
            let file = std::fs::File::open(path)?;
            decrypt_key_export(file, &passphrase)
        };

        let task = tokio::task::spawn_blocking(decrypt);
        // TODO remove this unwrap.
        let import = task.await.expect("Task join error").unwrap();

        Ok(olm.import_keys(import).await?)
    }
}

#[cfg(test)]
mod test {
    use crate::{ClientConfig, HttpError};

    use super::{
        get_public_rooms, get_public_rooms_filtered, register::RegistrationKind, Client,
        Invite3pid, Session, SyncSettings, Url,
    };
    use matrix_sdk_base::RoomMember;
    use matrix_sdk_common::{
        api::r0::{
            account::register::Request as RegistrationRequest,
            directory::get_public_rooms_filtered::Request as PublicRoomsFilterRequest,
            typing::create_typing_event::Typing, uiaa::AuthData,
        },
        assign,
        directory::Filter,
        events::{room::message::MessageEventContent, AnyMessageEventContent},
        identifiers::{event_id, room_id, user_id},
        thirdparty,
    };
    use matrix_sdk_test::{test_json, EventBuilder, EventsJson};
    use mockito::{mock, Matcher};
    use serde_json::json;

    use std::{collections::BTreeMap, convert::TryInto, io::Cursor, str::FromStr, time::Duration};

    async fn logged_in_client() -> Client {
        let session = Session {
            access_token: "1234".to_owned(),
            user_id: user_id!("@example:localhost"),
            device_id: "DEVICEID".into(),
        };
        let homeserver = url::Url::parse(&mockito::server_url()).unwrap();
        let client = Client::new(homeserver).unwrap();
        client.restore_login(session).await.unwrap();

        client
    }

    #[tokio::test]
    async fn login() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();

        let _m = mock("POST", "/_matrix/client/r0/login")
            .with_status(200)
            .with_body(test_json::LOGIN.to_string())
            .create();

        let client = Client::new(homeserver).unwrap();

        client
            .login("example", "wordpass", None, None)
            .await
            .unwrap();

        let logged_in = client.logged_in().await;
        assert!(logged_in, "Client should be logged in");
    }

    #[tokio::test]
    async fn devices() {
        let client = logged_in_client().await;

        let _m = mock("GET", "/_matrix/client/r0/devices")
            .with_status(200)
            .with_body(test_json::DEVICES.to_string())
            .create();

        assert!(client.devices().await.is_ok());
    }

    #[tokio::test]
    async fn test_join_leave_room() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();

        let room_id = room_id!("!SVkFJHzfwvuaIEawgC:localhost");

        let session = Session {
            access_token: "1234".to_owned(),
            user_id: user_id!("@example:localhost"),
            device_id: "DEVICEID".into(),
        };

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .with_body(test_json::SYNC.to_string())
        .create();

        let client = Client::new(homeserver.clone()).unwrap();
        client.restore_login(session.clone()).await.unwrap();

        let room = client.get_joined_room(&room_id);
        assert!(room.is_none());

        client.sync_once(SyncSettings::default()).await.unwrap();

        let room = client.get_left_room(&room_id);
        assert!(room.is_none());

        let room = client.get_joined_room(&room_id);
        assert!(room.is_some());

        // test store reloads with correct room state from the sled store
        let path = tempfile::tempdir().unwrap();
        let config = ClientConfig::default().store_path(path);
        let joined_client = Client::new_with_config(homeserver, config).unwrap();
        joined_client.restore_login(session).await.unwrap();

        // joined room reloaded from state store
        joined_client
            .sync_once(SyncSettings::default())
            .await
            .unwrap();
        let room = joined_client.get_joined_room(&room_id);
        assert!(room.is_some());

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .with_body(test_json::LEAVE_SYNC_EVENT.to_string())
        .create();

        joined_client
            .sync_once(SyncSettings::default())
            .await
            .unwrap();

        let room = joined_client.get_joined_room(&room_id);
        assert!(room.is_none());

        let room = joined_client.get_left_room(&room_id);
        assert!(room.is_some());
    }

    #[tokio::test]
    async fn account_data() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .with_body(test_json::SYNC.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let sync_settings = SyncSettings::new().timeout(Duration::from_millis(3000));
        let _response = client.sync_once(sync_settings).await.unwrap();

        // let bc = &client.base_client;
        // let ignored_users = bc.ignored_users.read().await;
        // assert_eq!(1, ignored_users.len())
    }

    #[tokio::test]
    async fn room_creation() {
        let client = logged_in_client().await;

        let response = EventBuilder::default()
            .add_state_event(EventsJson::Member)
            .add_state_event(EventsJson::PowerLevels)
            .build_sync_response();

        client
            .base_client
            .receive_sync_response(response)
            .await
            .unwrap();
        let room_id = room_id!("!SVkFJHzfwvuaIEawgC:localhost");

        assert_eq!(
            client.homeserver(),
            &Url::parse(&mockito::server_url()).unwrap()
        );

        let room = client.get_joined_room(&room_id);
        assert!(room.is_some());
    }

    #[tokio::test]
    async fn login_error() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();
        let client = Client::new(homeserver).unwrap();

        let _m = mock("POST", "/_matrix/client/r0/login")
            .with_status(403)
            .with_body(test_json::LOGIN_RESPONSE_ERR.to_string())
            .create();

        if let Err(err) = client.login("example", "wordpass", None, None).await {
            if let crate::Error::Http(HttpError::FromHttpResponse(
                crate::FromHttpResponseError::Http(crate::ServerError::Known(crate::api::Error {
                    kind,
                    message,
                    status_code,
                })),
            )) = err
            {
                if let crate::api::error::ErrorKind::Forbidden = kind {
                } else {
                    panic!(
                        "found the wrong `ErrorKind` {:?}, expected `Forbidden",
                        kind
                    );
                }
                assert_eq!(message, "Invalid password".to_string());
                assert_eq!(status_code, http::StatusCode::from_u16(403).unwrap());
            } else {
                panic!(
                    "found the wrong `Error` type {:?}, expected `Error::RumaResponse",
                    err
                );
            }
        } else {
            panic!("this request should return an `Err` variant")
        }
    }

    #[tokio::test]
    async fn register_error() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();
        let client = Client::new(homeserver).unwrap();

        let _m = mock("POST", "/_matrix/client/r0/register")
            .with_status(403)
            .with_body(test_json::REGISTRATION_RESPONSE_ERR.to_string())
            .create();

        let user = assign!(RegistrationRequest::new(), {
            username: Some("user"),
            password: Some("password"),
            auth: Some(AuthData::FallbackAcknowledgement { session: "foobar" }),
            kind: RegistrationKind::User,
        });

        if let Err(err) = client.register(user).await {
            if let crate::Error::Http(HttpError::UiaaError(crate::FromHttpResponseError::Http(
                // TODO this should be a UiaaError need to investigate
                crate::ServerError::Unknown(e),
            ))) = err
            {
                assert!(e.to_string().starts_with("EOF while parsing"))
            } else {
                panic!(
                    "found the wrong `Error` type {:#?}, expected `ServerError::Unknown",
                    err
                );
            }
        } else {
            panic!("this request should return an `Err` variant")
        }
    }

    #[tokio::test]
    async fn join_room_by_id() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/join".to_string()),
        )
        .with_status(200)
        .with_body(test_json::ROOM_ID.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");

        assert_eq!(
            // this is the `join_by_room_id::Response` but since no PartialEq we check the RoomId field
            client.join_room_by_id(&room_id).await.unwrap().room_id,
            room_id
        );
    }

    #[tokio::test]
    async fn join_room_by_id_or_alias() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/join/".to_string()),
        )
        .with_status(200)
        .with_body(test_json::ROOM_ID.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org").into();

        assert_eq!(
            // this is the `join_by_room_id::Response` but since no PartialEq we check the RoomId field
            client
                .join_room_by_id_or_alias(&room_id, &["server.com".try_into().unwrap()])
                .await
                .unwrap()
                .room_id,
            room_id!("!testroom:example.org")
        );
    }

    #[tokio::test]
    async fn invite_user_by_id() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/invite".to_string()),
        )
        .with_status(200)
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let user = user_id!("@example:localhost");
        let room_id = room_id!("!testroom:example.org");

        client.invite_user_by_id(&room_id, &user).await.unwrap();
    }

    #[tokio::test]
    async fn invite_user_by_3pid() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/invite".to_string()),
        )
        .with_status(200)
        // empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");

        client
            .invite_user_by_3pid(
                &room_id,
                Invite3pid {
                    id_server: "example.org",
                    id_access_token: "IdToken",
                    medium: thirdparty::Medium::Email,
                    address: "address",
                },
            )
            .await
            .unwrap();
    }

    #[tokio::test]
    async fn room_search_all() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();
        let client = Client::new(homeserver).unwrap();

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/publicRooms".to_string()),
        )
        .with_status(200)
        .with_body(test_json::PUBLIC_ROOMS.to_string())
        .create();

        let get_public_rooms::Response { chunk, .. } =
            client.public_rooms(Some(10), None, None).await.unwrap();
        assert_eq!(chunk.len(), 1);
    }

    #[tokio::test]
    async fn room_search_filtered() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/publicRooms".to_string()),
        )
        .with_status(200)
        .with_body(test_json::PUBLIC_ROOMS.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let generic_search_term = Some("cheese");
        let filter = assign!(Filter::new(), { generic_search_term });
        let request = assign!(PublicRoomsFilterRequest::new(), { filter });

        let get_public_rooms_filtered::Response { chunk, .. } =
            client.public_rooms_filtered(request).await.unwrap();
        assert_eq!(chunk.len(), 1);
    }

    #[tokio::test]
    async fn leave_room() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/leave".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");

        client.leave_room(&room_id).await.unwrap();
    }

    #[tokio::test]
    async fn ban_user() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/ban".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let user = user_id!("@example:localhost");
        let room_id = room_id!("!testroom:example.org");
        client.ban_user(&room_id, &user, None).await.unwrap();
    }

    #[tokio::test]
    async fn kick_user() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/kick".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let user = user_id!("@example:localhost");
        let room_id = room_id!("!testroom:example.org");

        client.kick_user(&room_id, &user, None).await.unwrap();
    }

    #[tokio::test]
    async fn forget_room() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/forget".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");

        client.forget_room_by_id(&room_id).await.unwrap();
    }

    #[tokio::test]
    async fn read_receipt() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/receipt".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");
        let event_id = event_id!("$xxxxxx:example.org");

        client.read_receipt(&room_id, &event_id).await.unwrap();
    }

    #[tokio::test]
    async fn read_marker() {
        let client = logged_in_client().await;

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/read_markers".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");
        let event_id = event_id!("$xxxxxx:example.org");

        client.read_marker(&room_id, &event_id, None).await.unwrap();
    }

    #[tokio::test]
    async fn typing_notice() {
        let client = logged_in_client().await;

        let _m = mock(
            "PUT",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/typing".to_string()),
        )
        .with_status(200)
        // this is an empty JSON object
        .with_body(test_json::LOGOUT.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let room_id = room_id!("!testroom:example.org");

        client
            .typing_notice(&room_id, Typing::Yes(std::time::Duration::from_secs(1)))
            .await
            .unwrap();
    }

    #[tokio::test]
    async fn room_message_send() {
        use matrix_sdk_common::uuid::Uuid;

        let client = logged_in_client().await;

        let _m = mock(
            "PUT",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/send/".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::EVENT_ID.to_string())
        .create();

        let room_id = room_id!("!testroom:example.org");

        let content =
            AnyMessageEventContent::RoomMessage(MessageEventContent::text_plain("Hello world"));
        let txn_id = Uuid::new_v4();
        let response = client
            .room_send(&room_id, content, Some(txn_id))
            .await
            .unwrap();

        assert_eq!(event_id!("$h29iv0s8:example.com"), response.event_id)
    }

    #[tokio::test]
    async fn room_attachment_send() {
        let client = logged_in_client().await;

        let _m = mock(
            "PUT",
            Matcher::Regex(r"^/_matrix/client/r0/rooms/.*/send/".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::EVENT_ID.to_string())
        .create();

        let _m = mock(
            "POST",
            Matcher::Regex(r"^/_matrix/media/r0/upload".to_string()),
        )
        .with_status(200)
        .match_header("content-type", "image/jpeg")
        .with_body(
            json!({
              "content_uri": "mxc://example.com/AQwafuaFswefuhsfAFAgsw"
            })
            .to_string(),
        )
        .create();

        let room_id = room_id!("!testroom:example.org");

        let mut media = Cursor::new("Hello world");

        let response = client
            .room_send_attachment(&room_id, "image", &mime::IMAGE_JPEG, &mut media, None)
            .await
            .unwrap();

        assert_eq!(event_id!("$h29iv0s8:example.com"), response.event_id)
    }

    #[tokio::test]
    async fn user_presence() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::SYNC.to_string())
        .create();

        let sync_settings = SyncSettings::new().timeout(Duration::from_millis(3000));

        let _response = client.sync_once(sync_settings).await.unwrap();

        let room = client
            .get_joined_room(&room_id!("!SVkFJHzfwvuaIEawgC:localhost"))
            .unwrap();
        let members: Vec<RoomMember> = room.active_members().await.unwrap();

        assert_eq!(1, members.len());
        // assert!(room.power_levels.is_some())
    }

    #[tokio::test]
    async fn calculate_room_names_from_summary() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::DEFAULT_SYNC_SUMMARY.to_string())
        .create();

        let sync_settings = SyncSettings::new().timeout(Duration::from_millis(3000));
        let _response = client.sync_once(sync_settings).await.unwrap();
        let room = client
            .get_joined_room(&room_id!("!SVkFJHzfwvuaIEawgC:localhost"))
            .unwrap();

        assert_eq!("example2", room.display_name().await.unwrap());
    }

    #[tokio::test]
    async fn invited_rooms() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::INVITE_SYNC.to_string())
        .create();

        let _response = client.sync_once(SyncSettings::default()).await.unwrap();

        assert!(client.joined_rooms().is_empty());
        assert!(client.left_rooms().is_empty());
        assert!(!client.invited_rooms().is_empty());

        assert!(client
            .get_invited_room(&room_id!("!696r7674:example.com"))
            .is_some());
    }

    #[tokio::test]
    async fn left_rooms() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::LEAVE_SYNC.to_string())
        .create();

        let _response = client.sync_once(SyncSettings::default()).await.unwrap();

        assert!(client.joined_rooms().is_empty());
        assert!(!client.left_rooms().is_empty());
        assert!(client.invited_rooms().is_empty());

        assert!(client
            .get_left_room(&room_id!("!SVkFJHzfwvuaIEawgC:localhost"))
            .is_some())
    }

    #[tokio::test]
    async fn sync() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .with_body(test_json::SYNC.to_string())
        .match_header("authorization", "Bearer 1234")
        .create();

        let sync_settings = SyncSettings::new().timeout(Duration::from_millis(3000));

        let response = client.sync_once(sync_settings).await.unwrap();

        assert_ne!(response.next_batch, "");

        assert!(client.sync_token().await.is_some());
    }

    #[tokio::test]
    async fn room_names() {
        let client = logged_in_client().await;

        let _m = mock(
            "GET",
            Matcher::Regex(r"^/_matrix/client/r0/sync\?.*$".to_string()),
        )
        .with_status(200)
        .match_header("authorization", "Bearer 1234")
        .with_body(test_json::SYNC.to_string())
        .create();

        let sync_settings = SyncSettings::new().timeout(Duration::from_millis(3000));

        let _response = client.sync_once(sync_settings).await.unwrap();

        let room = client
            .get_joined_room(&room_id!("!SVkFJHzfwvuaIEawgC:localhost"))
            .unwrap();

        assert_eq!("tutorial".to_string(), room.display_name().await.unwrap());
    }

    #[tokio::test]
    async fn delete_devices() {
        let homeserver = Url::from_str(&mockito::server_url()).unwrap();
        let client = Client::new(homeserver).unwrap();

        let _m = mock("POST", "/_matrix/client/r0/delete_devices")
            .with_status(401)
            .with_body(
                json!({
                    "flows": [
                        {
                            "stages": [
                                "m.login.password"
                            ]
                        }
                    ],
                    "params": {},
                    "session": "vBslorikviAjxzYBASOBGfPp"
                })
                .to_string(),
            )
            .create();

        let _m = mock("POST", "/_matrix/client/r0/delete_devices")
            .with_status(401)
            // empty response
            // TODO rename that response type.
            .with_body(test_json::LOGOUT.to_string())
            .create();

        let devices = &["DEVICEID".into()];

        if let Err(e) = client.delete_devices(devices, None).await {
            if let Some(info) = e.uiaa_response() {
                let mut auth_parameters = BTreeMap::new();

                let identifier = json!({
                    "type": "m.id.user",
                    "user": "example",
                });
                auth_parameters.insert("identifier".to_owned(), identifier);
                auth_parameters.insert("password".to_owned(), "wordpass".into());

                let auth_data = AuthData::DirectRequest {
                    kind: "m.login.password",
                    auth_parameters,
                    session: info.session.as_deref(),
                };

                client
                    .delete_devices(devices, Some(auth_data))
                    .await
                    .unwrap();
            }
        }
    }
}