feat: improved types, changes coming

MusicKitInstance.d.ts

@@ -1,3 +1,80 @@
 declare namespace MusicKit {
-    interface MusicKitInstance {}
+    type MediaItem = object;
+
+    interface Queue {
+        'currentItem': MediaItem;
+        'isEmpty': boolean;
+        'items': MediaItem[];
+        'length': number;
+        'nextPlayableItem': MediaItem;
+        'position': number;
+        'previousPlayableItem': MediaItem;
+    }
+
+    interface QueueOptions {
+        'album'?: string;
+        'albums'?: string[];
+        'musicVideo'?: string;
+        'musicVideos'?: string[];
+        'playlist'?: string;
+        'playlists'?: string[];
+        'song'?: string;
+        'songs'?: string[];
+    }
+
+    interface SeekSeconds {
+        'BACK': number;
+        'FORWARD': number;
+    }
+
+    interface MusicKitInstance {
+        'api': Readonly<MusicKitAPI>;
+        'bitrate': Readonly<PlaybackBitrate>;
+        'currentPlaybackDuration': Readonly<number>;
+        'currentPlaybackProgress': Readonly<number>;
+        'currentPlaybackTime': Readonly<number>;
+        'currentPlaybackTimeRemaining': Readonly<number>;
+        'isAuthorized': Readonly<boolean>;
+        'isPlaying': Readonly<boolean>;
+        'nowPlayingItem': Readonly<MediaItem>;
+        'nowPlayingItemIndex': Readonly<number>;
+        'playbackRate': Readonly<number>;
+        'playbackState': Readonly<PlaybackStates>;
+        'previewOnly': Readonly<boolean>;
+        'queue': Readonly<Queue>;
+        'queueIsEmpty': Readonly<boolean>;
+        'repeatMode': Readonly<PlayerRepeatMode>;
+        'seekSeconds': Readonly<SeekSeconds | undefined>;
+        'shuffleMode': Readonly<PlayerShuffleMode>;
+        'storefrontCountryCode': Readonly<string>;
+        'storefrontId': Readonly<string>;
+        'videoContainerElement': Readonly<HTMLVideoElement | undefined>;
+        'volume': Readonly<number>;
+        'addEventListener': ( name: string, callback: CallableFunction, options: {
+            'once': boolean
+        } ) => void;
+        'authorize': () => Promise<string | void>;
+        'changeToMediaAtIndex': ( index: number ) => Promise<void>;
+        'changeToMediaItem': ( descriptor: MediaItem | string ) => Promise<void>;
+        'changeUserStorefront': ( storefrontId: string ) => Promise<void>;
+        'clearQueue': () => Promise<Queue>;
+        'exitFullscreen': () => void;
+        'mute': () => void;
+        'pause': () => void;
+        'play': () => void;
+        'playAt': ( position: number, options: QueueOptions ) => Promise<Queue | void>;
+        'playLater': ( options: QueueOptions ) => Promise<Queue | void>;
+        'playNext': ( options: QueueOptions, clear: boolean ) => Promise<Queue | void>;
+        'removeEventListener': ( name: string, callback: CallableFunction ) => void;
+        'requestFullscreen': () => void;
+        'seekBackward': () => Promise<void>;
+        'seekForward': () => Promise<void>;
+        'seekToTime': ( time: number ) => Promise<void>;
+        'setQueue': ( options: QueueOptions ) => Promise<Queue | void>;
+        'skipToNextItem': () => Promise<void>;
+        'skipToPreviousItem': () => Promise<void>;
+        'stop': () => void;
+        'unauthorize': () => Promise<void>;
+        'unmute': () => void;
+    }
 }