import 'dart:io';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:workmanager/workmanager.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:odoo_rpc/odoo_rpc.dart';
import 'screens/login_screen.dart';
import 'screens/main_shell.dart';
import 'services/odoo_service.dart';
import 'services/config.dart';
import 'services/background_service.dart';
import 'services/notification_service.dart';

import 'services/theme_manager.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Initialize local notifications and request permission
  final notifService = NotificationService();
  await notifService.initialize();
  await notifService.requestPermission();

  // Initialize cached theme configuration
  await ThemeManager.instance.initialize();

  if (Platform.isAndroid || Platform.isIOS) {
    Workmanager().initialize(
      callbackDispatcher,
      isInDebugMode: false,
    );

    Workmanager().registerPeriodicTask(
      "odoo-loyalty-push-task",
      "fetch_notifications",
      frequency: const Duration(minutes: 15),
    );
  }

  final prefs = await SharedPreferences.getInstance();
  final sessionStr = prefs.getString('odoo_session');
  Widget homeWidget = const LoginScreen();

  if (sessionStr != null) {
    try {
      final sessionMap = json.decode(sessionStr) as Map<String, dynamic>;
      final session = OdooSession.fromJson(sessionMap);
      final service = OdooService();
      service.connect(AppConfig.odooUrl, session: session);
      homeWidget = MainShell(partnerId: session.partnerId);
    } catch (e) {
      homeWidget = const LoginScreen();
    }
  }

  runApp(OdooLoyaltyApp(homeWidget: homeWidget));
}

class OdooLoyaltyApp extends StatelessWidget {
  final Widget homeWidget;
  const OdooLoyaltyApp({super.key, required this.homeWidget});

  @override
  Widget build(BuildContext context) {
    return ListenableBuilder(
      listenable: ThemeManager.instance,
      builder: (context, _) {
        return MaterialApp(
          title: 'Mie Mapan Loyalty App',
          debugShowCheckedModeBanner: false,
          theme: ThemeManager.instance.themeData,
          home: homeWidget,
        );
      },
    );
  }
}