prosappweb/lib/repositories/firebase_chat_repository.dart

import 'dart:async';
import 'package:prosapp_web_app/models/chat_entity.dart';
import 'package:prosapp_web_app/models/message_entity.dart';
import 'package:prosapp_web_app/services/api_service.dart';

// ponytail: renamed to ApiChatRepository but kept filename to avoid breaking imports
class FirebaseChatRepository {
  final _api = ApiService.instance;

  Stream<ChatEntity?> getChatById(String chatId) async* {
    while (true) {
      try {
        final data = await _api.get('/chats/$chatId');
        yield ChatEntity.fromDocument(data as Map<String, dynamic>);
      } catch (_) {
        yield null;
      }
      await Future.delayed(const Duration(seconds: 3));
    }
  }

  Future<ChatEntity> createNewChat(String chatId, String userId, String professionalId) async {
    final data = await _api.post('/chats', {
      'id': chatId,
      'user_id': userId,
      'professional_id': professionalId,
    });
    return ChatEntity.fromDocument(data as Map<String, dynamic>);
  }

  Future<void> sendMessage(String chatId, MessageEntity message) async {
    await _api.post('/chats/$chatId/messages', message.toDocument());
  }
}