import 'dart:async';

import 'package:fcs/data/services/services.dart';
import 'package:fcs/domain/entities/auth_result.dart';
import 'package:fcs/domain/entities/setting.dart';
import 'package:fcs/domain/entities/user.dart';
import 'package:fcs/helpers/network_connectivity.dart';
import 'package:fcs/helpers/shared_pref.dart';
import 'package:fcs/pages/main/model/base_model.dart';
import 'package:flutter/foundation.dart';
import 'package:logging/logging.dart';
import 'package:package_info_plus/package_info_plus.dart';

class MainModel extends ChangeNotifier {
  final log = Logger('MainModel');
  List<BaseModel> models = [];

  String? messagingToken;
  User? user;
  User? _fbUser;
  PackageInfo? packageInfo;

  set setMessaginToken(token) {
    this.messagingToken = token;
    _uploadMsgToken();
  }

  Setting? setting;

  bool isLoaded = false;
  bool isOnline = false;
  bool isFirstLaunch = false;
  bool isLockOn = false;

  bool get isPinLogin => user?.isPinLogin ?? false;

  MainModel() {
    NetworkConnectivity.instance.statusStream.listen((data) {
      bool _isOnline = data != ConnectivityStatus.none;
      if (_isOnline && !this.isOnline) {
        _init();
      }
      this.isOnline = _isOnline;
      notifyListeners();
    });
  }

  bool faqEditable() {
    return this.user != null && this.user!.hasSupport();
  }

  bool rateEditable() {
    return this.user != null && this.user!.hasSupport();
  }

  bool paymentMethodsEditable() {
    return this.user != null && this.user!.hasSupport();
  }

  bool termEditable() {
    return this.user != null && this.user!.hasSupport();
  }

  bool contactEditable() {
    return this.user != null && this.user!.hasSupport();
  }

  bool isLogin() {
    return this.user != null;
  }

  bool isCustomer() {
    return user != null && user!.isCustomer();
  }

  bool isSysAdmin() {
    return this.user != null && this.user!.hasSysAdmin();
  }

  bool isAdmin() {
    return this.user != null && this.user!.hasAdmin();
  }

  // userListener should never be closed
  StreamSubscription<User?>? userListener;
  _init() async {
    await _listenSetting();
    this.isFirstLaunch = await SharedPref.isFirstLaunch() ?? true;
    this.packageInfo = await PackageInfo.fromPlatform();
    this.isLockOn = await SharedPref.getPinLockOn() ?? false;

    userListener?.cancel();
    userListener =
        Services.instance.authService.getUserStream().listen((_user) {
      bool isFirstTime = user == null && _user != null;
      bool diffPrivilege =
          _user != null && (user == null || user!.diffPrivileges(_user));
      bool loggingOut = user != null && _user == null;

      if (_user != null) {
        if (!_user.isPinLogin) {
          _fbUser = _user;
        }
      }

      if ((_fbUser?.id == _user?.id)) {
        _user?.pinToken = null;
      }

      user = _user;

      if (_user != null) {
        for (final m in models) {
          m.initUser(_user);
          if (diffPrivilege) {
            m.privilegeChanged();
          }
        }
      }

      if (loggingOut) {
        for (final m in models) {
          m.logout();
        }
      }

      if (isFirstTime) {
        _uploadMsgToken();
      }

      isLoaded = true;
      notifyListeners();
    });
  }

  void addModel(BaseModel model) {
    models.add(model);
  }

  Future<void> _listenSetting() async {
    try {
      Services.instance.authService.getSetting().listen((event) {
        this.setting = event;
        Services.setting = event;
        models.forEach((m) => m.initSetting(setting));
        notifyListeners();
      });
    } finally {}
  }

  bool isSupport() {
    if (packageInfo == null || setting == null) return false;
    return int.parse(packageInfo!.buildNumber) >= setting!.supportBuildNum;
  }

  Future<AuthResult> sendSms(String phoneNumber,
      {String? forceResendingToken}) {
    return Services.instance.authService.sendSmsCodeToPhoneNumber(phoneNumber,
        forceResendingToken: forceResendingToken);
  }

  Future<AuthResult> signin(String smsCode) async {
    AuthResult authResult =
        await Services.instance.authService.signInWithSmsCode(smsCode);
    return authResult;
  }

  Future<void> _uploadMsgToken() {
    if (messagingToken == null || user == null) return Future.value();
    return Services.instance.userService.uploadMsgToken(messagingToken!);
  }

  Future<void> _removeMsgToken() {
    if (messagingToken == null || user == null) return Future.value();
    return Services.instance.userService.removeMsgToken(messagingToken!);
  }

  Future<void> signout() async {
    try {
      await Services.instance.authService.signoutStart();
      await _removeMsgToken();
      for (var i = 0; i < models.length; i++) {
        models[i].initUser(null);
        models[i].logout();
      }

      await Services.instance.authService.signoutEnd();
    } catch (e) {
      log.info("signout:${e.toString()}");
    }
  }

  Future<bool> hasInvite() async {
    return Services.instance.authService.hasInvite();
  }

  Future<void> signup(String userName) async {
    await Services.instance.authService.signup(userName);
  }

  Future<void> joinInvite(String userName) async {
    await Services.instance.authService.joinInvite(userName);
    notifyListeners();
  }

  Future<void> updateProfileName(String newUserName) async {
    await Services.instance.authService.updateProfileName(newUserName);
    notifyListeners();
  }

  Future<void> updatePreferredCurrency(String currency) async {
    await Services.instance.authService.updatePreferredCurrency(currency);
    notifyListeners();
  }

  Future<void> deleteAccount() async {
    return await Services.instance.authService.deleteAccount();
  }

  Future<void> pinLogin({required String fcsID, required String pin}) async {
    await Services.instance.authService
        .pinLogin(fcsID: fcsID, pin: pin, currentUserId: _fbUser?.id ?? '');
  }

  Future<void> logoutPinAccount() async {
    await Services.instance.authService.logoutPinAccount();
  }
}