use std::collections::HashSet;

use sqlite::OpenFlags;

use crate::artifacts::{Album, Artifact, Artist, SourceID, Track};

#[derive(Debug)]
#[allow(unused)]
pub enum MixxxError {
    Sql(sqlite::Error)
}

impl From<sqlite::Error> for MixxxError {
    fn from(value: sqlite::Error) -> Self {
        Self::Sql(value)
    }
}

pub struct MixxxDB(());

impl MixxxDB {
    pub fn load(playlist_name: &str) -> Result<Vec<Artifact>, MixxxError> {
        let mut ret = vec![];
        log::info!("Loading Mixxx playlist {}", playlist_name);
        let connection = sqlite::Connection::open_thread_safe_with_flags("mixxxdb.sqlite", OpenFlags::new().with_read_only())?;
        let query = "SELECT id FROM Playlists WHERE name = ? ORDER BY id DESC LIMIT 1";
        let mut statement = connection.prepare(query)?;
        statement.bind((1, playlist_name))?;
        statement.next()?;
        let latest_id = statement.read::<i64, _>("id")?;

        let query = "SELECT title, artist, album, comment, url, bpm FROM library LEFT JOIN PlaylistTracks ON PlaylistTracks.track_id = library.id WHERE PlaylistTracks.playlist_id = ? ORDER BY position";
        for track in connection.prepare(query)?.into_iter().bind((1, latest_id))? {
            let track = track?;
            let title = track.try_read::<&str, _>("title").unwrap_or("Untitled Track");
            let artist = track.try_read::<&str, _>("artist").unwrap_or("Unknown Artist");
            let album = track.try_read::<&str, _>("album").unwrap_or("Unknown Album");
            let bpm = track.try_read::<f64, _>("bpm").unwrap_or(0.);
            ret.push(Artifact::Track(Track {
                artist: Some(artist.into()),
                album: Some(album.into()),
                title: title.into(),
                bpm: Some(bpm),
                sources: HashSet::from([SourceID::Mixxx]),
                ..Default::default()
            }));

            ret.push(Artifact::Album(Album {
                artist: artist.into(),
                title: album.into(),
                sources: HashSet::from([SourceID::Mixxx]),
                ..Default::default()
            }));

            ret.push(Artifact::Artist(Artist {
                name: artist.into(),
                sources: HashSet::from([SourceID::Mixxx]),
                ..Default::default()
            }));
        }

        Ok(ret)
    }
}