import 'package:flutter/foundation.dart';

import '../data/repositories/client_repository.dart';
import '../data/services/api_client.dart';
import '../data/services/secure_session_store.dart';

class AppDependencies {
  AppDependencies._({
    required this.session,
    required this.repository,
  });

  final UserSession session;
  final ClientRepository repository;

  static Future<AppDependencies> create() async {
    final store = SecureSessionStore();
    final session = UserSession(store);
    await session.restore();
    final api = ApiClient(() => session.token);
    return AppDependencies._(session: session, repository: ClientRepository(api));
  }
}

class UserSession extends ChangeNotifier {
  UserSession(this._store);

  static const _root = '/heqi/client/v1/user';
  final SecureSessionStore _store;
  String _token = '';

  String get token => _token;
  bool get isAuthenticated => _token.isNotEmpty;

  Future<void> restore() async {
    _token = await _store.readToken() ?? '';
  }

  Future<void> login({
    required String phone,
    required String password,
    String? verificationCode,
    String? requestIdentity,
  }) async {
    final api = ApiClient(() => '');
    final verification = verificationCode != null && verificationCode.isNotEmpty;
    final details = jsonMap(
      await api.post(
        '$_root/auth/login',
        authenticated: false,
        body: {
          'phone': phone,
          'mode': verification ? 'verification_code' : 'password',
          'password': verification ? '' : password,
          'code': verificationCode ?? '',
          'request_identity': requestIdentity ?? '',
        },
      ),
    );
    _token = details['access_token'] as String? ?? '';
    if (_token.isEmpty) throw const ApiException(500, '登录令牌缺失');
    await _store.writeToken(_token);
    notifyListeners();
  }

  Future<String> sendCode(String phone, String purpose) async {
    final api = ApiClient(() => '');
    final details = jsonMap(
      await api.post(
        '$_root/auth/verification-code',
        authenticated: false,
        body: {'phone': phone, 'purpose': purpose},
      ),
    );
    return details['request_identity'] as String? ?? '';
  }

  Future<void> logout() async {
    _token = '';
    await _store.clear();
    notifyListeners();
  }
}