import 'package:flutter/material.dart';
import 'package:todoapp/elems/filehandler.dart';
import 'package:todoapp/pages/Home.dart';
import 'package:provider/provider.dart';
import 'package:todoapp/providers/todoprovider.dart';
import 'package:awesome_notifications/awesome_notifications.dart';
import 'package:workmanager/workmanager.dart';
import 'package:disable_battery_optimization/disable_battery_optimization.dart';

@pragma('vm:entry-point')
void callbackDispatcher() {
  Workmanager().executeTask((task, inputData) async {
    AwesomeNotifications().initialize(
        null,
        [
          NotificationChannel(
              channelKey: "reminder_channel",
              channelName: "Reminders",
              channelDescription: "Reminder for ToDo")
        ]);

    Map content = await FileHandler.fileContent;
    for (String key in content.keys) {
      Map list = content[key];
      for (String title in list.keys) {
        Map current = list[title];
        DateTime dueTime = DateTime.parse(current["dueTime"]);
        bool checked = current["checked"];
        DateTime currentTime = DateTime.now();
        int timeDiff = dueTime
            .difference(currentTime)
            .inMinutes;
        if (timeDiff <= 30 && timeDiff >= 0 && !checked) {
          AwesomeNotifications().createNotification(
              content: NotificationContent(
                  id: 10,
                  channelKey: "reminder_channel",
                  title: "Task due!",
                  body: "Task $title due in $timeDiff minutes!"
              )
          );
        }
      }
    }
    return Future.value(true);
  });
}


void main() async {


  AwesomeNotifications().initialize(
      null,
      [
        NotificationChannel(
            channelKey: "reminder_channel",
            channelName: "Reminders",
            channelDescription: "Reminder for ToDo")
      ]);

  Workmanager().initialize(
      callbackDispatcher,
      isInDebugMode: true
  );

  Workmanager().registerPeriodicTask("check_nots", "nots_check", frequency: Duration(minutes: 15));
  // Workmanager().registerOneOffTask("test", "test1");

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [ChangeNotifierProvider(create: (context) => TodoProvider())],
      child: MaterialApp(
        theme: ThemeData(
          colorScheme: ColorScheme.fromSeed(
              seedColor: Colors.blue, brightness: Brightness.dark),
          useMaterial3: true,
        ),
        home: const Home(),
      ),
    );
  }
}