syntax = "proto3";

option go_package = "relay/internal/proto";

package proto;

/* Mouse messages */

// MouseMove message
message ProtoMouseMove {
  int32 x = 1;
  int32 y = 2;
}

// MouseMoveAbs message
message ProtoMouseMoveAbs {
  int32 x = 1;
  int32 y = 2;
}

// MouseWheel message
message ProtoMouseWheel {
  int32 x = 1;
  int32 y = 2;
}

// MouseKeyDown message
message ProtoMouseKeyDown {
  int32 key = 1;
}

// MouseKeyUp message
message ProtoMouseKeyUp {
  int32 key = 1;
}

/* Keyboard messages */

// KeyDown message
message ProtoKeyDown {
  int32 key = 1;
}

// KeyUp message
message ProtoKeyUp {
  int32 key = 1;
}

/* Controller messages */

// ControllerAttach message
message ProtoControllerAttach {
  string id = 1; // One of the following enums: "ps", "xbox" or "switch"
  int32 session_slot = 2; // Session specific slot number (0-3)
  string session_id = 3; // Session ID of the client
}

// ControllerDetach message
message ProtoControllerDetach {
  int32 session_slot = 1; // Session specific slot number (0-3)
  string session_id = 2; // Session ID of the client
}

// ControllerRumble message
message ProtoControllerRumble {
  int32 session_slot = 1; // Session specific slot number (0-3)
  string session_id = 2; // Session ID of the client
  int32 low_frequency = 3; // Low frequency rumble (0-65535)
  int32 high_frequency = 4; // High frequency rumble (0-65535)
  int32 duration = 5; // Duration in milliseconds
}

// ControllerStateBatch - single message containing full or partial controller state
message ProtoControllerStateBatch {
  int32 session_slot = 1; // Session specific slot number (0-3)
  string session_id = 2; // Session ID of the client

  enum UpdateType {
    FULL_STATE = 0;    // Complete controller state
    DELTA = 1;         // Only changed fields
  }
  UpdateType update_type = 3;

  // Sequence number for packet loss detection
  uint32 sequence = 4;

  // Button state map (Linux event codes)
  map<int32, bool> button_changed_mask = 5;

  // Analog inputs
  optional int32 left_stick_x = 6;   // -32768 to 32767
  optional int32 left_stick_y = 7;   // -32768 to 32767
  optional int32 right_stick_x = 8;  // -32768 to 32767
  optional int32 right_stick_y = 9;  // -32768 to 32767
  optional int32 left_trigger = 10;  // -32768 to 32767
  optional int32 right_trigger = 11; // -32768 to 32767
  optional int32 dpad_x = 12;        // -1, 0, or 1
  optional int32 dpad_y = 13;        // -1, 0, or 1

  // Bitmask indicating which fields have changed
  // Bit 0: button_changed_mask, Bit 1: left_stick_x, Bit 2: left_stick_y, etc.
  optional uint32 changed_fields = 14;
}

/* WebRTC + signaling */

message RTCIceCandidateInit {
  string candidate = 1;
  optional uint32 sdpMLineIndex = 2;
  optional string sdpMid = 3;
  optional string usernameFragment = 4;
}

message RTCSessionDescriptionInit {
  string sdp = 1;
  string type = 2;
}

// ProtoICE message
message ProtoICE {
  RTCIceCandidateInit candidate = 1;
}

// ProtoSDP message
message ProtoSDP {
  RTCSessionDescriptionInit sdp = 1;
}

// ProtoRaw message
message ProtoRaw {
  string data = 1;
}

// ProtoClientRequestRoomStream message
message ProtoClientRequestRoomStream {
  string room_name = 1;
  string session_id = 2;
}

// ProtoClientDisconnected message
message ProtoClientDisconnected {
  string session_id = 1;
  repeated int32 controller_slots = 2;
}

// ProtoServerPushStream message
message ProtoServerPushStream {
  string room_name = 1;
}