package pb.remote;

// The supported message types
enum MsgType {
  UNKNOWN = 0;
  // Messages generally send from client to server
  CONNECT = 1;
  DISCONNECT = 2;
  REQUEST_PLAYLISTS = 3;
  REQUEST_PLAYLIST_SONGS = 4;
  CHANGE_SONG = 5;
  SET_VOLUME = 6;
  
  // Messages send by both
  PLAY = 20;
  PLAYPAUSE = 21;
  PAUSE = 22;
  STOP = 23;
  NEXT = 24;
  PREVIOUS = 25;
  SHUFFLE_PLAYLIST = 26;
  // Messages that contain the repeat or random mode
  // Either set by client or clementine
  REPEAT = 27;
  RANDOM = 28;
  
  // Messages send from server to client
  INFOS = 40;
  CURRENT_METAINFOS = 41;
  PLAYLISTS = 42;
  PLAYLIST_SONGS = 43;
  ENGINE_STATE_CHANGED = 44;
  KEEP_ALIVE = 45;
}

// Valid Engine states
enum EngineState {
  Empty = 0;
  Idle = 1;
  Playing = 2;
  Paused = 3;
}

// Song Metadata
message SongMetadata {
  optional int32 id = 1; // unique id of the song
  optional int32 index = 2; // Index of the current row of the active playlist
  optional string title = 3;
  optional string album = 4;
  optional string artist = 5;
  optional string albumartist = 6;
  optional int32 track = 7;
  optional int32 disc = 8;
  optional string pretty_year = 9;
  optional string genre = 10;
  optional int32 playcount = 11;
  optional string pretty_length = 12;
  optional bytes art = 13;
}

// Playlist informations
message Playlist {
  optional int32 id = 1;
  optional string name = 2;
  optional int32 item_count = 3;
  optional bool active = 4;
  
  // The songs are only sent when the client requests them.
  // See src/remotecontrol/outgoingdatacreator.cpp for more info
  repeated SongMetadata songs = 10;
}

// Valid Repeatmodes
enum RepeatMode {
  Repeat_Off = 0;
  Repeat_Track = 1;
  Repeat_Album = 2;
  Repeat_Playlist = 3;
}

// Valid Shuffle modes
enum ShuffleMode {
  Shuffle_Off = 0;
  Shuffle_All = 1;
  Shuffle_InsideAlbum = 2;
  Shuffle_Albums = 3;
}

// Message with unknown content
// Shouldn't be used anywhere
message Unknown {
}

// This message is sent when a client connects to clementine
message Connect {
}

// This message is sent when a client disconnects from clementine
message Disconnect {
}

// Client requests all playlists
message RequestPlaylists {
}

// A Client requests songs from a specific playlist
message RequestPlaylistSongs {
  optional int32 id = 1;
}

// Client want to change track
message RequestChangeSong {
  // In which playlist is the song?
  optional int32 playlist_id = 1;
  // And on which position?
  optional int32 song_index = 2;
}

// Set the volume
message RequestSetVolume {
  optional int32 volume = 1;
}

// Controlmessages
message Play {}
message PlayPause {}
message Pause {}
message Stop {}
message Next {}
message Previous {}
message ShufflePlaylist {}

// Repeat and Random messages
message Repeat {
  optional RepeatMode repeat_mode = 1;
}

message Shuffle {
  optional ShuffleMode shuffle_mode = 1;
}
  
// Response from server
// General infos
message ResponseClementineInfo {
  optional string version = 1;
}

// The current song played
message ResponseCurrentMetadata {
  optional SongMetadata song_metadata = 1;
}

// The playlists in clementine
message ResponsePlaylists {
  repeated Playlist playlist = 1;
}

// A list of songs in a playlist
message ResponsePlaylistSongs {
  optional Playlist requested_playlist = 1;
  repeated SongMetadata song = 2;
}

// The current state of the play engine
message ResponseEngineStateChanged {
  optional EngineState state = 1;
}

// Empty Keep Alive telegram
message KeepAlive {}

// The message itself
message Message {
  required int32 version = 1 [default=1];
  required MsgType msgType = 2 [default=UNKNOWN]; // What data is in the message?
  
  optional Unknown unknown = 10;
  optional Connect connect = 11;
  optional Disconnect disconnect = 12;
  optional RequestPlaylists request_playlist = 13;
  optional RequestPlaylistSongs request_playlist_songs = 14;
  optional RequestChangeSong request_change_song = 15;
  optional RequestSetVolume request_set_volume = 16;
  optional Play play = 17;
  optional PlayPause play_pause = 18;
  optional Pause pause = 19;
  optional Stop stop = 20;
  optional Next next = 21;
  optional Previous previous = 22;
  optional ShufflePlaylist shuffle_playlist = 23;
  optional Repeat repeat = 24;
  optional Shuffle shuffle = 25;
  optional ResponseClementineInfo response_clementine_info = 26;
  optional ResponseCurrentMetadata response_current_metadata = 27;
  optional ResponsePlaylists response_playlists = 28;
  optional ResponsePlaylistSongs response_playlist_songs = 29;
  optional ResponseEngineStateChanged response_engine_state_changed = 30;
}