import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io' show File, Platform;
import 'package:http/http.dart' as http;

import 'package:rxdart/subjects.dart';

class NotificationPlugin {
  //
  FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;
  final BehaviorSubject<ReceivedNotification>
      didReceivedLocalNotificationSubject =
      BehaviorSubject<ReceivedNotification>();
  var initializationSettings;

  NotificationPlugin._() {
    init();
  }

  init() async {
    flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
    if (Platform.isIOS) {
      _requestIOSPermission();
    }
    initializePlatformSpecifics();
  }

  initializePlatformSpecifics() {
    var initializationSettingsAndroid =
        AndroidInitializationSettings('app_notf_icon');

    var initializationSettingsIOS = IOSInitializationSettings(
      requestAlertPermission: true,
      requestBadgePermission: true,
      requestSoundPermission: false,
      onDidReceiveLocalNotification: (id, title, body, payload) async {
        ReceivedNotification receivedNotification = ReceivedNotification(
            id: id, title: title, body: body, payload: payload);
        didReceivedLocalNotificationSubject.add(receivedNotification);
      },
    );

    initializationSettings = InitializationSettings(
        android: initializationSettingsAndroid, iOS: initializationSettingsIOS);
  }

  _requestIOSPermission() {
    flutterLocalNotificationsPlugin
        .resolvePlatformSpecificImplementation<
            IOSFlutterLocalNotificationsPlugin>()
        .requestPermissions(
          alert: true,
          badge: true,
          sound: true,
        );
  }

  setListenerForLowerVersions(Function onNotificationInLowerVersions) {
    didReceivedLocalNotificationSubject.listen((receivedNotification) {
      onNotificationInLowerVersions(receivedNotification);
    });
  }

  setOnNotificationClick(Function onNotificationClick) async {
    await flutterLocalNotificationsPlugin.initialize(initializationSettings,
        onSelectNotification: (String payload) async {
      onNotificationClick(payload);
    });
  }

  Future<void> showNotification(
      String title, String body, String payload) async {
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL_ID',
      'CHANNEL_NAME',
      channelDescription: "CHANNEL_DESCRIPTION",
      importance: Importance.max,
      priority: Priority.high,
      playSound: true,
      timeoutAfter: 5000,
      styleInformation: DefaultStyleInformation(true, true),
    );
    var iosChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        android: androidChannelSpecifics, iOS: iosChannelSpecifics);
    await flutterLocalNotificationsPlugin.show(
      0,
      title,
      body, //null
      platformChannelSpecifics,
      payload: payload,
    );
  }

  Future<void> showDailyAtTime() async {
    var time = Time(21, 3, 0);
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL_ID 4',
      'CHANNEL_NAME 4',
      channelDescription: "CHANNEL_DESCRIPTION 4",
      importance: Importance.max,
      priority: Priority.high,
    );
    var iosChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        android: androidChannelSpecifics, iOS: iosChannelSpecifics);
    // ignore: deprecated_member_use
    await flutterLocalNotificationsPlugin.showDailyAtTime(
      0,
      'Test Title at ${time.hour}:${time.minute}.${time.second}',
      'Test Body', //null
      time,
      platformChannelSpecifics,
      payload: 'Test Payload',
    );
  }

  Future<void> showWeeklyAtDayTime() async {
    var time = Time(21, 5, 0);
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL_ID 5',
      'CHANNEL_NAME 5',
      channelDescription: "CHANNEL_DESCRIPTION 5",
      importance: Importance.max,
      priority: Priority.high,
    );
    var iosChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        android: androidChannelSpecifics, iOS: iosChannelSpecifics);
    // ignore: deprecated_member_use
    await flutterLocalNotificationsPlugin.showWeeklyAtDayAndTime(
      0,
      'Test Title at ${time.hour}:${time.minute}.${time.second}',
      'Test Body', //null
      Day.saturday,
      time,
      platformChannelSpecifics,
      payload: 'Test Payload',
    );
  }

  Future<void> repeatNotification() async {
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL_ID 3',
      'CHANNEL_NAME 3',
      channelDescription: "CHANNEL_DESCRIPTION 3",
      importance: Importance.max,
      priority: Priority.high,
    );
    var iosChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        android: androidChannelSpecifics, iOS: iosChannelSpecifics);
    await flutterLocalNotificationsPlugin.periodicallyShow(
      0,
      'Repeating Test Title',
      'Repeating Test Body',
      RepeatInterval.everyMinute,
      platformChannelSpecifics,
      payload: 'Test Payload',
    );
  }

  Future<void> scheduleNotification() async {
    var scheduleNotificationDateTime = DateTime.now().add(Duration(seconds: 5));
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL_ID 1',
      'CHANNEL_NAME 1',
      channelDescription: "CHANNEL_DESCRIPTION 1",
      icon: 'secondary_icon',
      sound: RawResourceAndroidNotificationSound('my_sound'),
      largeIcon: DrawableResourceAndroidBitmap('large_notf_icon'),
      enableLights: true,
      color: const Color.fromARGB(255, 255, 0, 0),
      ledColor: const Color.fromARGB(255, 255, 0, 0),
      ledOnMs: 1000,
      ledOffMs: 500,
      importance: Importance.max,
      priority: Priority.high,
      playSound: true,
      timeoutAfter: 5000,
      styleInformation: DefaultStyleInformation(true, true),
    );
    var iosChannelSpecifics = IOSNotificationDetails(
      sound: 'my_sound.aiff',
    );
    var platformChannelSpecifics = NotificationDetails(
      android: androidChannelSpecifics,
      iOS: iosChannelSpecifics,
    );
    // ignore: deprecated_member_use
    await flutterLocalNotificationsPlugin.schedule(
      0,
      'Test Title',
      'Test Body',
      scheduleNotificationDateTime,
      platformChannelSpecifics,
      payload: 'Test Payload',
    );
  }

  Future<void> showNotificationWithAttachment() async {
    var attachmentPicturePath = await _downloadAndSaveFile(
        'https://via.placeholder.com/800x200', 'attachment_img.jpg');
    var iOSPlatformSpecifics = IOSNotificationDetails(
      attachments: [IOSNotificationAttachment(attachmentPicturePath)],
    );
    var bigPictureStyleInformation = BigPictureStyleInformation(
      FilePathAndroidBitmap(attachmentPicturePath),
      contentTitle: '<b>Attached Image</b>',
      htmlFormatContentTitle: true,
      summaryText: 'Test Image',
      htmlFormatSummaryText: true,
    );
    var androidChannelSpecifics = AndroidNotificationDetails(
      'CHANNEL ID 2',
      'CHANNEL NAME 2',
      channelDescription: 'CHANNEL DESCRIPTION 2',
      importance: Importance.high,
      priority: Priority.high,
      styleInformation: bigPictureStyleInformation,
    );
    var notificationDetails = NotificationDetails(
        android: androidChannelSpecifics, iOS: iOSPlatformSpecifics);
    await flutterLocalNotificationsPlugin.show(
      0,
      'Title with attachment',
      'Body with Attachment',
      notificationDetails,
    );
  }

  _downloadAndSaveFile(String url, String fileName) async {
    var directory = await getApplicationDocumentsDirectory();
    var filePath = '${directory.path}/$fileName';
    var response = await http.get(Uri.parse(url));
    var file = File(filePath);
    await file.writeAsBytes(response.bodyBytes);
    return filePath;
  }

  Future<int> getPendingNotificationCount() async {
    List<PendingNotificationRequest> p =
        await flutterLocalNotificationsPlugin.pendingNotificationRequests();
    return p.length;
  }

  Future<void> cancelNotification() async {
    await flutterLocalNotificationsPlugin.cancel(0);
  }

  Future<void> cancelAllNotification() async {
    await flutterLocalNotificationsPlugin.cancelAll();
  }
}

NotificationPlugin notificationPlugin = NotificationPlugin._();

class ReceivedNotification {
  final int id;
  final String title;
  final String body;
  final String payload;

  ReceivedNotification({
    @required this.id,
    @required this.title,
    @required this.body,
    @required this.payload,
  });
}