syntax = "proto3";
package player;

service MusicPlayer {
  rpc TogglePause (TogglePauseRequest) returns (TogglePauseResponse);
  rpc SkipNext (SkipNextRequest) returns (SkipNextResponse);
  rpc GetProgress (GetProgressRequest) returns (GetProgressResponse);
  rpc VolumeUp (VolumeUpRequest) returns (VolumeReply);
  rpc VolumeDown (VolumeDownRequest) returns (VolumeReply);
  rpc CycleLoop (CycleLoopRequest) returns (CycleLoopReply);
  rpc SpeedUp (SpeedUpRequest) returns (SpeedReply);
  rpc SpeedDown (SpeedDownRequest) returns (SpeedReply);
  rpc ToggleGapless (ToggleGaplessRequest) returns (ToggleGaplessReply);
  rpc SeekForward (SeekForwardRequest) returns (PlayerTime);
  rpc SeekBackward (SeekBackwardRequest) returns (PlayerTime);
  rpc ReloadConfig (ReloadConfigRequest) returns (EmptyReply);
  rpc ReloadPlaylist (ReloadPlaylistRequest) returns (EmptyReply);
  rpc PlaySelected (PlaySelectedRequest) returns (EmptyReply);
  rpc SkipPrevious(SkipPreviousRequest) returns (EmptyReply);
}

message TogglePauseRequest {}
message TogglePauseResponse {
  uint32 status = 1;
}

message SkipNextRequest {}
message SkipNextResponse{}

message PlayerTime {
  Duration position = 1;
  Duration total_duration = 2;
}

message GetProgressRequest {}
message GetProgressResponse{
  PlayerTime progress = 1;
  uint32 current_track_index = 3;
  uint32 status = 4;
  // actually a u16, but protobuf does not support types lower than 32 bits
  uint32 volume = 5;
  int32 speed = 6;
  bool gapless = 7;
  bool current_track_updated = 8;
  string radio_title = 9;
}

message VolumeUpRequest {}
message VolumeDownRequest {}
message VolumeReply {
  // actually a u16, but protobuf does not support types lower than 32 bits
  uint32 volume = 1;
}
message CycleLoopRequest {}
message CycleLoopReply {}
message SpeedUpRequest {}
message SpeedDownRequest {}
message SpeedReply {
  int32 speed = 1;
}
message ToggleGaplessRequest {}
message ToggleGaplessReply {
  bool gapless = 1;
}

message SeekForwardRequest {}
message SeekBackwardRequest {}
// old usage for the Seek*Request, but completely covered by PlayerTime
// message SeekReply {
//   uint32 position = 1;
//   uint32 duration = 2;
// }

message ReloadConfigRequest {}
message ReloadPlaylistRequest {}
message EmptyReply {}

message PlaySelectedRequest {}
message SkipPreviousRequest {}

// using a custom Duration that matches rust's definition, as rust's may not fit into google's well-known Duration
message Duration {
  uint64 secs = 1;
  uint32 nanos = 2;
}