kent_logistics_app/lib/services/chat_service.dart

import 'dart:io';

import 'package:dio/dio.dart';
import '../config/api_config.dart';

class ChatService {
  final Dio dio;

  ChatService(this.dio);

  /// Start chat / get ticket
  Future<Map<String, dynamic>> startChat() async {
    final res = await dio.get('/user/chat/start');
    return Map<String, dynamic>.from(res.data);
  }

  /// Get all messages
  Future<List<dynamic>> getMessages(int ticketId) async {
    final res = await dio.get('/user/chat/messages/$ticketId');
    return res.data['messages'];
  }

  /// Send message (text or file)
  Future<void> sendMessage(
      int ticketId, {
        String? message,
        String? clientId,
      }) async {
    final form = FormData();

    if (message != null) form.fields.add(MapEntry('message', message));
    if (clientId != null) form.fields.add(MapEntry('client_id', clientId));

    await dio.post('/user/chat/send/$ticketId', data: form);
  }


  // ---------------------------
  // SEND FILE (image/video/pdf/excel)
  // ---------------------------
  Future<Map<String, dynamic>> sendFile(
      int ticketId,
      File file, {
        required Function(double) onProgress,
      }) async {
    final formData = FormData.fromMap({
      'file': await MultipartFile.fromFile(
        file.path,
        filename: file.path.split('/').last,
      ),
    });

    final res = await dio.post(
      "/user/chat/send/$ticketId",
      data: formData,
      options: Options(
        headers: {'Content-Type': 'multipart/form-data'},
      ),
      onSendProgress: (sent, total) {
        if (total > 0) {
          onProgress(sent / total);
        }
      },
    );

    return Map<String, dynamic>.from(res.data['message']);
  }

}