import "common.proto";

package Remote;

message AudioCollectionRequest
{

	message BatchParameter
	{
		required uint32 offset			= 1;	// First element requested
		required uint32	size			= 2;	// Number of elements requested. Server may not honor this size if too big
	}

	message GetRevision
	{

	}

	message GetGenreList
	{
		required BatchParameter batch_parameter = 1;
	}

	message GetArtistList
	{
		required BatchParameter batch_parameter = 1;

		repeated uint64	genre_id		= 2;	// Artist that has at least a track of the genre
	}

	message GetReleaseList
	{
		required BatchParameter batch_parameter = 1;
		// Search filters
		repeated uint64	artist_id		= 2;	// Release that contains at least a track of one of these artists
		repeated uint64	filter_genre		= 3;	// Release that has at least a track of the genre
	}

	message GetTrackList
	{
		required BatchParameter batch_parameter = 1;
		// Search filters
		repeated uint64	artist_id		= 2;	// Track that belongs to these artists
		repeated uint64	release_id		= 3;	// Track that is part of these releases
		repeated uint64	genre_id		= 4;    // Track that has at least a track of the genre
	}

	message GetCoverArt
	{
		enum Type
		{
			TypeGetCoverArtRelease		= 1;
			TypeGetCoverArtTrack		= 2;
		}

		required Type	type			= 1;

		optional uint64	release_id		= 2;	// Release that owns the cover art
		optional uint64	track_id		= 3;	// Track that owns the cover art

		required uint32 size			= 4;	// Scale image to size*size pixels. Set 0 to get the biggest image
	}

	enum Type
	{
		TypeGetRevision		= 1;
		TypeGetGenreList	= 2;
		TypeGetArtistList	= 3;
		TypeGetReleaseList	= 4;
		TypeGetTrackList	= 5;
		TypeGetCoverArt		= 6;
	}

	required Type	type			= 1;

	optional GetRevision	get_revision	= 2;
	optional GetGenreList	get_genres	= 3;
	optional GetArtistList	get_artists	= 4;
	optional GetReleaseList	get_releases	= 5;
	optional GetTrackList	get_tracks	= 6;
	optional GetCoverArt	get_cover_art	= 7;
}


message AudioCollectionResponse
{

	message Revision
	{
		required string	rev	= 1;	// Unique identifier of the database revision
	}

	message GenreList
	{
		repeated Genre	genres	= 2;
	}

	message ArtistList
	{
		repeated Artist	artists	= 2;
	}

	message ReleaseList
	{
		repeated Release	releases = 2;
	}

	message TrackList
	{
		repeated Track	tracks	= 2;
	}

	message CoverArt
	{
		optional string	mime_type	= 1;
		required bytes data		= 2;
	}

	message Genre
	{
		required uint64	id		= 1;	// Genre Id

		required string name		= 2;
	}

	message Artist
	{
		required uint64	id		= 1;	// Artist Id

		required string name		= 2;
	}

	message Release
	{
		required uint64	id		= 1;	// Release id

		required string name		= 2;
	}

	message Track
	{
		required uint64	id		= 1;	// Track id

		required uint64	artist_id	= 2;
		required uint64	release_id	= 3;
		repeated uint64	genre_id	= 4;

		optional uint32 disc_number	= 5;
		optional uint32 track_number	= 6;
		required string	name		= 7;
		required uint32	duration_secs	= 8;
		optional string	release_date	= 9;
		optional string	original_release_date	= 10;
	}

	enum Type {
		TypeRevision	= 1;
		TypeGenreList	= 2;
		TypeArtistList	= 3;
		TypeReleaseList	= 4;
		TypeTrackList	= 5;
		TypeCoverArt	= 6;
	}


	required Type		type		= 1;

	optional Revision	revision	= 2;
	optional GenreList	genre_list	= 3;
	optional ArtistList	artist_list	= 4;
	optional ReleaseList	release_list	= 5;
	optional TrackList	track_list	= 6;
	repeated CoverArt	cover_art	= 7;
}