syntax = "proto3";

package library.rpc;

import "library/domain.proto";

message GetBookRequest {
  string isbn = 1;
}

message QueryBooksRequest {
  string title_prefix = 1;
  // Reusing the Genre enum from domain.proto
  library.domain.Genre genre_filter = 2;
}

message CheckoutRequest {
  string isbn = 1;
}

message CheckoutResponse {
  // Reusing Book type
  repeated library.domain.Book checked_out_books = 1;
  int32 total_items = 2;
  string due_date = 3;
}

message ChatMessage {
  string user_id = 1;
  string text = 2;
  int64 timestamp = 3;
}