import 'dart:async';
import 'dart:io';
import 'package:barcode_scan2/barcode_scan2.dart';
import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:flutter/material.dart';
import 'package:unit2/model/login_data/user_info/user_data.dart';
import 'package:unit2/model/login_data/version_info.dart';
import 'package:unit2/screens/unit2/login/functions/get_app_version.dart';
import 'package:unit2/sevices/login_service/auth_service.dart';
import 'package:unit2/utils/global.dart';

import '../../utils/scanner.dart';
import '../../utils/text_container.dart';

part 'user_event.dart';
part 'user_state.dart';

class UserBloc extends Bloc<UserEvent, UserState> {
  UserData? _userData;
  VersionInfo? _versionInfo;
  String? _apkVersion;
  bool save = false;
  UserBloc() : super(UserInitial()) {
    // this event is called when opening the app to check if
    // there is new app version
    on<GetApkVersion>((event, emit) async {
      try {
        emit(SplashScreen());
        VersionInfo versionInfo = await AuthService.instance.getVersionInfo();
        _versionInfo = versionInfo;
        String apkVersion = await getAppVersion();
        _apkVersion = apkVersion;
        final String? saved = CREDENTIALS?.get('saved');
        final String? username = CREDENTIALS?.get('username');
        final String? password = CREDENTIALS?.get('password');
        if (saved != null) {
          save = true;
          add(UserLogin(username: username, password: password));
        } else {
          emit(VersionLoaded(
              versionInfo: _versionInfo, apkVersion: _apkVersion));
        }
      } catch (e) {
        emit(UserError(
          message: e.toString(),
        ));
      }
    });
//Loading the current version of the app
    on<LoadVersion>((event, emit) {
      emit(VersionLoaded(versionInfo: _versionInfo, apkVersion: _apkVersion));
    });

    on<UserLogin>((event, emit) async {
      try {
        Map<dynamic, dynamic> response = await AuthService.instance
            .webLogin(username: event.username, password: event.password);
        if (response['status'] == true) {
          UserData userData = UserData.fromJson(response['data']);
          emit(UserLoggedIn(
              userData: userData, success: true, message: response['message'],savedCredentials: save));
        } else {
          emit(UserLoggedIn(
              userData: null, success: false, message: response['message'],savedCredentials: save));
        }
      } on TimeoutException catch (_) {
        emit(InternetTimeout(message: timeoutError));
      } on SocketException catch (_) {
        emit(InternetTimeout(message: timeoutError));
      }
    });
    on<UuidLogin>((event, emit) async {
      try {
        UserData? userData = await AuthService.instance
            .qrLogin(uuid: event.uuid, password: event.password);
        _userData = userData;
        emit(UserLoggedIn(userData: _userData,savedCredentials: save));
      } on TimeoutException catch (_) {
        emit(InternetTimeout(message: timeoutError));
      } on SocketException catch (_) {
        emit(InternetTimeout(message: timeoutError));
      } on Error catch (_) {
        emit(InvalidCredentials(message: "Invalid username or password"));
      }
    });
    on<LoadLoggedInUser>((event, emit) {
      emit(UserLoggedIn(userData: _userData,savedCredentials: save));
    });
    on<GetUuid>((event, emit) async {
      ScanResult result = await QRCodeBarCodeScanner.instance.scanner();
      if (result.rawContent.toString().isNotEmpty) {
        emit(UuidLoaded(uuid: result.rawContent.toString()));
      }
    });
  }
}