mod config;
mod control;
mod events;
mod health;
mod html;
mod irc_format;
mod irc_task;
mod owncast_api;
mod router;
mod webhook;
mod websocket;

use std::path::PathBuf;
use std::time::Instant;

use clap::Parser;
use tokio::sync::{mpsc, watch};
use tracing::info;

#[derive(Parser)]
#[command(name = "owncast-irc-bridge")]
#[command(about = "Bidirectional chat bridge between Owncast and IRC")]
struct Cli {
    /// Path to config file
    #[arg(short, long, default_value = "config.toml")]
    config: PathBuf,
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    tracing_subscriber::fmt()
        .with_env_filter(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info")),
        )
        .init();

    let cli = Cli::parse();
    let config = config::BridgeConfig::load(&cli.config)?;
    let access_token = config.owncast_access_token()?;

    info!("Starting owncast-irc-bridge");

    let start_time = Instant::now();
    let (shutdown_tx, shutdown_rx) = watch::channel(false);

    let (event_tx, event_rx) = mpsc::channel(256);
    let (irc_outbound_tx, irc_outbound_rx) = mpsc::channel(256);
    let (state_tx, state_rx) = mpsc::channel(32);
    let (control_tx, control_rx) = mpsc::channel(32);

    let api_client = owncast_api::OwncastApiClient::new(
        config.owncast.url.clone(),
        access_token,
    );

    let irc_config = config.irc.clone();
    let irc_event_tx = event_tx.clone();
    let irc_shutdown = shutdown_rx.clone();
    let _irc_handle = tokio::spawn(async move {
        irc_task::run_irc_task(irc_config, irc_event_tx, irc_outbound_rx, irc_shutdown).await;
    });

    let webhook_port = config.owncast.webhook_port;
    let webhook_event_tx = event_tx.clone();
    let _webhook_handle = tokio::spawn(async move {
        if let Err(e) = webhook::run_webhook_server(webhook_port, webhook_event_tx).await {
            tracing::error!(error = %e, "Webhook server failed");
        }
    });

    let _ws_handle = if config.owncast.websocket_enabled {
        let ws_api = owncast_api::OwncastApiClient::new(
            config.owncast.url.clone(),
            String::new(),
        );
        let ws_display_name = config.owncast.ws_display_name.clone();
        let ws_event_tx = event_tx.clone();
        let ws_shutdown = shutdown_rx.clone();
        Some(tokio::spawn(async move {
            websocket::run_websocket_task(ws_api, ws_display_name, ws_event_tx, ws_shutdown).await;
        }))
    } else {
        None
    };

    let health_api = owncast_api::OwncastApiClient::new(
        config.owncast.url.clone(),
        String::new(),
    );
    let health_interval = std::time::Duration::from_secs(config.owncast.health_poll_interval_secs);
    let health_shutdown = shutdown_rx.clone();
    let _health_handle = tokio::spawn(async move {
        health::run_health_poller(&health_api, state_tx, health_interval, health_shutdown).await;
    });

    let control_socket_path = config.control.socket_path.clone();
    let _control_handle = tokio::spawn(async move {
        if let Err(e) = control::run_control_socket(&control_socket_path, control_tx).await {
            tracing::error!(error = %e, "Control socket failed");
        }
    });

    let sig_shutdown_tx = shutdown_tx.clone();
    tokio::spawn(async move {
        let mut sigterm = tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())
            .expect("Failed to register SIGTERM handler");
        let mut sighup = tokio::signal::unix::signal(tokio::signal::unix::SignalKind::hangup())
            .expect("Failed to register SIGHUP handler");

        tokio::select! {
            _ = tokio::signal::ctrl_c() => {
                info!("SIGINT received, shutting down");
                let _ = sig_shutdown_tx.send(true);
            }
            _ = sigterm.recv() => {
                info!("SIGTERM received, shutting down");
                let _ = sig_shutdown_tx.send(true);
            }
            _ = sighup.recv() => {
                info!("SIGHUP received (reconnect not yet wired)");
            }
        }
    });

    router::run_router(
        config.bridge,
        config.owncast.url,
        api_client,
        event_rx,
        irc_outbound_tx,
        state_rx,
        control_rx,
        shutdown_tx,
        start_time,
    )
    .await;

    info!("Bridge shutting down");
    Ok(())
}