syntax = "proto3";

package proto;

option go_package = "./;proto";

import "google/protobuf/timestamp.proto";

service MessageService {
  rpc CreateChat (CreateChatRequest) returns (ChatResponse);
  rpc SendMessage (SendMessageRequest) returns (MessageResponse);
  rpc GetChat (GetChatRequest) returns (ChatResponse);
  rpc GetChatMessages (GetChatMessagesRequest) returns (MessagesResponse);
  rpc GetUserChats (GetUserChatsRequest) returns (UserChatsResponse);
  rpc UpdateMessageStatus (UpdateMessageStatusRequest) returns (MessageResponse);
  rpc StreamMessages (StreamMessagesRequest) returns (stream MessageResponse);
}

message CreateChatRequest {
  int32 user1_id = 1;
  int32 user2_id = 2;
}

message SendMessageRequest {
  int32 chat_id = 1;
  int32 sender_id = 2;
  string content = 3;
}

message GetChatRequest {
  int32 user1_id = 1;
  int32 user2_id = 2;
}

message GetChatMessagesRequest {
  int32 chat_id = 1;
  int32 limit = 2;
  int32 offset = 3;
}

message GetUserChatsRequest {
  int32 user_id = 1;
}

message UpdateMessageStatusRequest {
  int32 message_id = 1;
  string status = 2;
  int32 userId = 3;
}

message StreamMessagesRequest {
  int32 user_id = 1;
}

message Message {
  int32 id = 1;
  int32 chat_id = 2;
  int32 sender_id = 3;
  int32 receiver_id = 4;  
  string content = 5;
  string status = 6;
  google.protobuf.Timestamp created_at = 7;
}

message Chat {
  int32 id = 1;
  int32 user1_id = 2;
  int32 user2_id = 3;
  google.protobuf.Timestamp created_at = 4;
  google.protobuf.Timestamp updated_at = 5;
  Message last_message = 6;
}

message MessageResponse {
  Message message = 1;
}

message MessagesResponse {
  repeated Message messages = 1;
}

message ChatResponse {
  Chat chat = 1;
}

message UserChatsResponse {
  repeated Chat chats = 1;
}