use clap::{Args, Parser, Subcommand, ValueEnum};
use paris::{error, info, success};
use serde::{Deserialize, Serialize};
use std::error::Error;
use std::fmt;
use std::process::exit;
use tokio::io::AsyncWriteExt;
use tokio::net::TcpStream;
use url::Url;
use uuid::Uuid;

#[derive(Debug, Parser)]
#[command(name = "forge-server")]
#[command(about = "A simple remote build system", long_about = None)]
struct Cli {
    #[arg(value_name = "IP")]
    host: String,

    #[arg(value_name = "PORT", default_value_t = 9134)]
    port: u16,

    #[command(subcommand)]
    command: Commands,
}

#[derive(Debug, Subcommand)]
enum Commands {
    /// Send a new build request
    #[command(arg_required_else_help = true)]
    Send {
        /// Password for authentication
        #[arg(long, value_name = "PASSWD")]
        auth: Option<String>,

        /// Whether to profile the build
        #[arg(long, default_value_t = false)]
        profile: bool,

        /// Command(s) to run before building
        #[arg(long, value_name = "CMD")]
        prexec: Option<String>,

        /// Remote git repository to clone from
        #[arg(long, value_name = "URL")]
        repo: String,

        /// Build system to use
        #[arg(long,require_equals = true, num_args = 0..=1, default_value_t = BuildSystem::Cargo,default_missing_value = "cargo")]
        build: BuildSystem,

        /// Cargo/Make subcommand to use
        #[arg(long, require_equals = true, num_args = 0..=1, default_value_t = BuildSubcommand::Build, default_missing_value = "build")]
        subcommand: BuildSubcommand,

        /// Comma-separated cargo features
        #[arg(long, value_name = "FEATURES")]
        features: Option<Vec<String>>,

        /// Optional cargo flag
        #[arg(long, require_equals = true, num_args = 0..=1, default_value_t = Tag::Debug, default_missing_value = "debug")]
        tag: Tag,

        /// Basename of the repository
        #[arg(long, value_name = "NAME")]
        basename: String,
    },
}

#[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialEq, Eq, ValueEnum)]
enum BuildSystem {
    Cargo,
    Make,
}

impl std::fmt::Display for BuildSystem {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.to_possible_value()
            .expect("no values are skipped")
            .get_name()
            .fmt(f)
    }
}

#[derive(Serialize, Deserialize, ValueEnum, Copy, Clone, Debug, PartialEq, Eq)]
enum BuildSubcommand {
    Run,
    Build,
    Install,
}

impl std::fmt::Display for BuildSubcommand {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.to_possible_value()
            .expect("no values are skipped")
            .get_name()
            .fmt(f)
    }
}

#[derive(Serialize, Deserialize, ValueEnum, Copy, Clone, Debug, PartialEq, Eq)]
enum Tag {
    Release,
    Debug,
}

impl std::fmt::Display for Tag {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.to_possible_value()
            .expect("no values are skipped")
            .get_name()
            .fmt(f)
    }
}

#[derive(Serialize, Deserialize)]
struct Command {
    build_system: BuildSystem,
    subcommand: BuildSubcommand,
    features: Option<Vec<String>>,
    tag: Tag,
}

#[derive(Serialize, Deserialize)]
struct Message {
    authentication: Option<String>,
    uuid: Uuid,
    pre_exec: Option<String>,
    profile: bool,
    command: Command,
    repository: Url,
    basename: String,
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let args = Cli::parse();
    match args.command {
        Commands::Send {
            auth,
            repo,
            profile,
            prexec,
            build,
            subcommand,
            features,
            tag,
            basename,
        } => {
            // Connect to a peer
            let remote = format!("{}:{}", args.host, args.port);
            let mut stream = match TcpStream::connect(&remote).await {
                Ok(s) => s,
                Err(e) => {
                    error!("Could not connect to remote host: {}", e);
                    exit(1);
                }
            };
            success!("Connected to: <green>{}<//>", &remote);

            let test_command = Command {
                build_system: build,
                subcommand,
                features,
                tag,
            };
            let test_message = Message {
                authentication: auth,
                uuid: Uuid::new_v4(),
                pre_exec: prexec,
                profile,
                command: test_command,
                repository: Url::parse(&repo).unwrap(),
                basename,
            };

            info!("Message UUID: <magenta>{}<//>", &test_message.uuid);

            let j = match serde_json::to_string(&test_message) {
                Ok(s) => s,
                Err(e) => {
                    error!("Could not serialize JSON message: {}", e);
                    exit(1);
                }
            };

            match stream.write_all(&j.as_bytes()).await {
                Ok(_) => {
                    info!(
                        "Sent JSON:\n<bright-white>{}<//>",
                        serde_json::to_string_pretty(&test_message)?
                    );
                }
                Err(e) => error!("Could not write to stream: {}", e),
            }
        }
    }

    Ok(())
}