syntax = "proto3";

package konfa.chat.v1;

option go_package = "/chatv1";

import "google/protobuf/timestamp.proto";

service ChatService {
  rpc SendMessage(SendMessageRequest) returns (SendMessageResponse) {}
  rpc GetMessageHistory(GetMessageHistoryRequest) returns (GetMessageHistoryResponse) {}
  rpc GetMessage(GetMessageRequest) returns (GetMessageResponse) {}
  rpc StreamNewMessages(StreamNewMessagesRequest)
      returns (stream StreamNewMessagesResponse) {}
  rpc UploadAttachment(stream UploadAttachmentRequest) returns (UploadAttachmentResponse) {}
}

message TextChannelRef {
  string server_id = 1;
  string channel_id = 2;
}

message SendMessageRequest {
  TextChannelRef channel = 1;
  string content = 2;
}

message SendMessageResponse {
  string message_id = 1;
}

message Message {
  string message_id = 1;
  string sender_id = 4;
  string content = 5;
  google.protobuf.Timestamp timestamp = 6;
}

message GetMessageHistoryRequest { 
  TextChannelRef channel = 1;
  google.protobuf.Timestamp from = 2;
  int32 count = 3;
 }

message GetMessageHistoryResponse { repeated Message messages = 1; }

message GetMessageRequest { 
  TextChannelRef channel = 1;
  string message_id = 2;
 }

 message GetMessageResponse { Message message = 1; }

message StreamNewMessagesRequest { TextChannelRef channel = 1; }

message StreamNewMessagesResponse { string message_id = 1; }

message UploadAttachmentRequest {
  oneof payload {
    AttachmentUploadInfo info = 1;
    bytes data = 2 ;
  }
}

message AttachmentUploadInfo {
  string name = 1;
}

message UploadAttachmentResponse { string attachmen_id = 1; }