import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:ontime_merchant_flutter/data/api/api_client.dart';
import 'package:ontime_merchant_flutter/features/auth/data/merchant_auth_api.dart';
import 'package:ontime_merchant_flutter/features/auth/data/models/merchant_model.dart';
import 'package:shared_preferences/shared_preferences.dart';

class AuthState {
  const AuthState({
    this.merchant,
    this.isLoading = false,
    this.errorMessage,
  });

  final MerchantModel? merchant;
  final bool isLoading;
  final String? errorMessage;

  AuthState copyWith({
    MerchantModel? merchant,
    bool? isLoading,
    String? errorMessage,
  }) {
    return AuthState(
      merchant: merchant ?? this.merchant,
      isLoading: isLoading ?? this.isLoading,
      errorMessage: errorMessage,
    );
  }
}

final authControllerProvider =
    StateNotifierProvider<AuthController, AuthState>((ref) => AuthController());

class AuthController extends StateNotifier<AuthState> {
  AuthController() : super(const AuthState());

  late final MerchantAuthApi _api =
      MerchantAuthApi(ApiClient(basicAuthUser: null, basicAuthPassword: null));

  Future<void> login({
    required String noTelepon,
    required String password,
    String? fcmToken,
  }) async {
    state = state.copyWith(isLoading: true, errorMessage: null);
    try {
      final merchant = await _api.login(
        noTelepon: noTelepon,
        password: password,
        fcmToken: fcmToken,
      );
      state = state.copyWith(merchant: merchant, isLoading: false);
      final prefs = await SharedPreferences.getInstance();
      await prefs.setString('merchant_id_mitra', merchant.idMitra);
      await prefs.setString('merchant_id_merchant', merchant.idMerchant);
      await prefs.setString('merchant_phone', merchant.teleponMitra);
      await prefs.setString('merchant_token', merchant.tokenMerchant);
    } catch (e) {
      state = state.copyWith(
        isLoading: false,
        errorMessage: e.toString().replaceFirst('Exception: ', ''),
      );
    }
  }

  void logout() {
    state = const AuthState();
  }

  static Future<void> clearStored() async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.remove('merchant_id_mitra');
    await prefs.remove('merchant_id_merchant');
    await prefs.remove('merchant_phone');
    await prefs.remove('merchant_token');
  }
}