use std::sync::{Arc, RwLock};
use std::{env, process::exit};
use url::Url;

use matrix_sdk::{
    self,
    events::{
        collections::all::RoomEvent,
        room::message::{MessageEvent, MessageEventContent, TextMessageEventContent},
        EventResult,
    },
    AsyncClient, AsyncClientConfig, Room, SyncSettings,
};

async fn async_cb(room: Arc<RwLock<Room>>, event: Arc<EventResult<RoomEvent>>) {
    let room = room.read().unwrap();
    let event = if let EventResult::Ok(event) = &*event {
        event
    } else {
        return;
    };
    if let RoomEvent::RoomMessage(MessageEvent {
        content: MessageEventContent::Text(TextMessageEventContent { body: msg_body, .. }),
        sender,
        ..
    }) = event
    {
        let user = room.members.get(&sender.to_string()).unwrap();
        println!(
            "{}: {}",
            user.display_name.as_ref().unwrap_or(&sender.to_string()),
            msg_body
        );
    }
}

async fn login(
    homeserver_url: String,
    username: String,
    password: String,
) -> Result<(), matrix_sdk::Error> {
    let client_config = AsyncClientConfig::new()
        .proxy("http://localhost:8080")?
        .disable_ssl_verification();
    let homeserver_url = Url::parse(&homeserver_url)?;
    let mut client = AsyncClient::new_with_config(homeserver_url, None, client_config).unwrap();

    client.add_event_callback(async_cb);

    client.login(username, password, None).await?;
    client.sync_forever(SyncSettings::new(), |_| async {}).await;

    Ok(())
}

#[tokio::main]
async fn main() -> Result<(), matrix_sdk::Error> {
    tracing_subscriber::fmt::init();

    let (homeserver_url, username, password) =
        match (env::args().nth(1), env::args().nth(2), env::args().nth(3)) {
            (Some(a), Some(b), Some(c)) => (a, b, c),
            _ => {
                eprintln!(
                    "Usage: {} <homeserver_url> <username> <password>",
                    env::args().next().unwrap()
                );
                exit(1)
            }
        };

    login(homeserver_url, username, password).await
}