<?php

class Database 
{
	private $host;
    private $user;
    private $pass;
   	private $dbname;
    private $pdo;

	public function __construct($host, $user, $pass, $dbname) {
		$this->host = $host;
		$this->user = $user;
		$this->pass = $pass;
		$this->dbname = $dbname;
	}
	public function connect() {
		$driver_options = [
			PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
			PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
		];
		$dsn = "mysql:host=$this->host;dbname=$this->dbname";
		$this->pdo = new PDO($dsn, $this->user, $this->pass,$driver_options);
	}

	public function query($sql, $params = []) {
		$stmt = $this->pdo->prepare($sql);
		if ($stmt->execute($params) === true)
			return $stmt;
		return false;
	}

	public function lastInsertId(){
		return $this->pdo->lastInsertId();
	}
}


class MusicAPI
{
    static private $db = null;
    static private $BASE_QUERY = "SELECT Song.id, Song.name, Album.name AS `album-name`, Album.year, Artist.name AS `artist-name`, Genre.name AS `genre` ".
	    "FROM Song ".
	    "JOIN Track ON Song.id=Track.songId ".
	    "JOIN Album ON Track.albumId=Album.id ".
	    "JOIN Artist ON Album.artistId=Artist.id ".
	    "JOIN Cover ON Album.coverId=Cover.id ".
	    "JOIN Genre ON Album.genreId=Genre.id ";

    public static function init()
    {
        self::$db = new Database("localhost", "fauvet", "toto", "fauvet");
        self::$db->connect();
    }

    public static function findSongById($id)
    {
        $sql = self::$BASE_QUERY."WHERE Song.id = ?";
        $stmt = self::$db->query($sql, [$id]);
        return $stmt->fetchAll();
    }

    public static function findAllSongByTitleContaining($title)
    {
	$sql = self::$BASE_QUERY."WHERE Song.name LIKE ?;";
	$stmt = self::$db->query($sql, ['%' . $title . '%']);
     	return $stmt->fetchAll();
    }

    public static function findSongByAlbumName($a)
    {
	$sql = self::$BASE_QUERY."WHERE Album.name LIKE ?;";
	$stmt = self::$db->query($sql, ['%' . $a . '%']);
        return $stmt->fetchAll();
    }

    public static function findAllSong()
    {
        $sql = self::$BASE_QUERY.";";
        $stmt = self::$db->query($sql);
        return $stmt->fetchAll();
    }

    //Fonctions pour la recherche d'album

    public static function findAlbumById($id)
    {
        $sql = "SELECT Album.id, Album.name, Album.year FROM Album WHERE Album.id=?;";
        $stmt = self::$db->query($sql, [$id]);
        return $stmt->fetchAll();
    }

    public static function findAlbumByNameContaining($n)
    {
        $sql = "SELECT Album.id, Album.name, Album.year FROM Album WHERE Album.name LIKE ?;";
        $stmt = self::$db->query($sql, ['%'.$n.'%']);
        return $stmt->fetchAll();
    }

    public static function findAllAlbum()
    {
        $sql = "SELECT Album.id, Album.name, Album.year FROM Album;";
        $stmt = self::$db->query($sql);
        return $stmt->fetchAll();
    }

    //Fonctions pour la recherche de titres

    public static function findArtsistById($id)
    {
        $sql = "SELECT Artist.id, Artist.name FROM Artist WHERE Artist.id=?;";
        $stmt = self::$db->query($sql, [$id]);
        return $stmt->fetchAll();
    }

    public static function findArtsistByNameContaining($n)
    {
        $sql = "SELECT Artist.id, Artist.name FROM Artist WHERE Artist.name LIKE ?;";
        $stmt = self::$db->query($sql, ['%'.$n.'%']);
        return $stmt->fetchAll();
    }

    public static function findAllArtist()
    {
        $sql = "SELECT * FROM Artist;";
        $stmt = self::$db->query($sql);
        return $stmt->fetchAll();
    }

    // Fonctions gestion des playlists
    public static function findAllPlaylists()
    {
        $sql = "SELECT * FROM Playlist;";
        $stmt = self::$db->query($sql);
        return $stmt->fetchAll();
    }

    public static function findPlaylistById($id)
    {
        $sql = "SELECT * FROM Playlist WHERE Playlist.id=?;";
        $stmt = self::$db->query($sql, [$id]);
        return $stmt->fetchAll();
    }

    public static function createPlaylist($name)
    {
        $sql = "INSERT INTO Playlist (name) VALUES (?);";
        self::$db->query($sql, [$name]);
        return self::$db->lastInsertId();
    }

    public static function deletePlaylist($id)
    {
        $sql = "DELETE FROM Playlist WHERE id=?;";
        return self::$db->query($sql, [$id]);
    }
}
?>