use flow::Flow;
use std::{
    net::{IpAddr, Ipv4Addr, SocketAddr},
    path::PathBuf,
    sync::Arc,
};
use warp::Filter;

use music_player::{
    audio::TrackInfo,
    core::Core,
    database::{MemoryIndex, MusicIndex},
    music_scanner::FileScanner,
};

fn tracks(index: &Arc<impl MusicIndex>) -> Vec<TrackInfo> {
    match index.list_tracks() {
        Flow::Ok(tracks) => tracks,
        Flow::Err(err) => panic!("error: {}", err),
        Flow::Fatal(err) => panic!("fatal: {}", err),
    }
}

struct Static(PathBuf);

impl Static {
    fn read(self, root: PathBuf) -> String {
        /*
        let mut path = root;
        match self {
            Bundle::Index => path.push(PathBuf::from("index.html")),
            Bundle::App => path.push(PathBuf::from("bundle.js")),
            Bundle::Styles => path.push(PathBuf::from("styles.css")),
        };
        std::fs::read_to_string(path).expect("to find the file")
        */
        let mut path = root;
        path.push(self.0);
        println!("path: {:?}", path);
        std::fs::read_to_string(path).expect("to find the file")
    }
}

#[tokio::main]
pub async fn main() {
    let dev = std::env::var("DEV")
        .ok()
        .and_then(|v| v.parse::<bool>().ok())
        .unwrap_or(false);
    let bundle_root = std::env::var("BUNDLE_ROOT")
        .map(|b| PathBuf::from(b))
        .unwrap();
    let music_root = std::env::var("MUSIC_ROOT")
        .map(|b| PathBuf::from(b))
        .unwrap();

    let index = Arc::new(MemoryIndex::new());
    let scanner = FileScanner::new(vec![music_root.clone()]);
    let _core = match Core::new(index.clone(), scanner) {
        Flow::Ok(core) => core,
        Flow::Err(error) => panic!("error: {}", error),
        Flow::Fatal(error) => panic!("fatal: {}", error),
    };

    println!("config: {:?} {:?} {:?}", dev, bundle_root, music_root);

    let root = warp::path!().and(warp::get()).map({
        let bundle_root = bundle_root.clone();
        move || {
            warp::http::Response::builder()
                .header("content-type", "text/html")
                .body(Static(PathBuf::from("index.html")).read(bundle_root.clone()))
        }
    });
    let assets = warp::path!(String).and(warp::get()).map({
        let bundle_root = bundle_root.clone();
        move |filename: String| {
            let mime_type = mime_guess::from_path(filename.clone())
                .first()
                .map(|m| m.essence_str().to_owned())
                .unwrap_or("text/plain".to_owned());
            println!("mime_type: {:?}", mime_type);
            // let mut path = PathBuf::from("assets");
            // path.push(filename);
            warp::http::Response::builder()
                .header("content-type", mime_type)
                .body(Static(PathBuf::from(filename)).read(bundle_root.clone()))
        }
    });

    /*
    let devices = warp::path!("api" / "v1" / "devices")
        .and(warp::get())
        .map(|| {
            let conn = Connection::new_session().expect("to connect to dbus");
            warp::reply::json(&list_devices(conn))
        });
        */

    let track_list = warp::path!("api" / "v1" / "tracks").and(warp::get()).map({
        let index = index.clone();
        move || warp::reply::json(&tracks(&index))
    });

    /*
    let tracks_for_artist = warp::path!("api" / "v1" / "artist" / String)
        .and(warp::get())
        .map(|_artist: String| warp::reply::json(&tracks()));
    let tracks_for_album = warp::path!("api" / "v1" / "album" / String)
        .and(warp::get())
        .map(|_album: String| warp::reply::json(&tracks()));

    let queue = warp::path!("api" / "v1" / "queue")
        .and(warp::get())
        .map(|| {
            let conn = Connection::new_session().expect("to connect to dbus");
            warp::reply::json(&list_tracks(conn))
        });

    let playing_status = warp::path!("api" / "v1" / "play-pause")
        .and(warp::get())
        .map(|| warp::reply::json(&PlayPause::Paused));

    let routes = devices
        .or(track_list)
        .or(tracks_for_album)
        .or(tracks_for_artist)
        .or(queue)
        .or(playing_status);
        */
    let routes = root.or(assets).or(track_list);
    let server = warp::serve(routes);
    server
        .run(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 8002))
        .await;
}