//! Local game directory monitor.

use std::time::Duration;

use tokio::sync::mpsc::UnboundedSender;

use crate::{
    PeerEvent,
    config::LOCAL_GAME_MONITOR_INTERVAL_SECS,
    context::Ctx,
    handlers::update_and_announce_games,
    local_games::scan_local_library,
};

/// Monitors the local game directory for changes.
pub async fn run_local_game_monitor(
    tx_notify_ui: UnboundedSender<PeerEvent>,
    ctx: Ctx,
) -> eyre::Result<()> {
    log::info!(
        "Starting local game directory monitor ({LOCAL_GAME_MONITOR_INTERVAL_SECS}s interval)"
    );

    let mut interval = tokio::time::interval(Duration::from_secs(LOCAL_GAME_MONITOR_INTERVAL_SECS));

    loop {
        tokio::select! {
            () = ctx.shutdown.cancelled() => return Ok(()),
            _ = interval.tick() => {}
        }

        let game_dir = { ctx.game_dir.read().await.clone() };
        match scan_local_library(&game_dir).await {
            Ok(scan) => {
                update_and_announce_games(&ctx, &tx_notify_ui, scan).await;
            }
            Err(err) => {
                log::error!("Failed to scan local games directory: {err}");
            }
        }
    }
}