import 'dart:async';
import 'dart:math';
import 'package:Intaleq/controller/functions/crud.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:Intaleq/constant/box_name.dart';
import 'package:Intaleq/onbording_page.dart';
import 'package:Intaleq/views/auth/login_page.dart';
import 'package:Intaleq/controller/auth/login_controller.dart';
import 'package:Intaleq/controller/functions/secure_storage.dart';
import 'package:quick_actions/quick_actions.dart';
import '../../../constant/notification.dart';
import '../../../main.dart';
import '../firebase/firbase_messge.dart';
import '../firebase/local_notification.dart';
import '../functions/encrypt_decrypt.dart';

class SplashScreenController extends GetxController
    with GetTickerProviderStateMixin {
  late AnimationController _animationController;
  late Animation<double> titleFadeAnimation,
      titleScaleAnimation,
      taglineFadeAnimation,
      footerFadeAnimation;
  late Animation<Offset> taglineSlideAnimation;

  final progress = 0.0.obs;
  Timer? _progressTimer;

  @override
  void onInit() {
    super.onInit();
    _animationController = AnimationController(
        vsync: this, duration: const Duration(milliseconds: 2000));

    // Animation definitions
    titleFadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
        CurvedAnimation(
            parent: _animationController,
            curve: const Interval(0.0, 0.5, curve: Curves.easeOut)));
    titleScaleAnimation = Tween<double>(begin: 0.8, end: 1.0).animate(
        CurvedAnimation(
            parent: _animationController,
            curve: const Interval(0.0, 0.5, curve: Curves.easeOut)));
    taglineFadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
        CurvedAnimation(
            parent: _animationController,
            curve: const Interval(0.3, 0.8, curve: Curves.easeOut)));
    taglineSlideAnimation =
        Tween<Offset>(begin: const Offset(0, 0.5), end: Offset.zero).animate(
            CurvedAnimation(
                parent: _animationController,
                curve: const Interval(0.3, 0.8, curve: Curves.easeOut)));
    footerFadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
        CurvedAnimation(
            parent: _animationController,
            curve: const Interval(0.5, 1.0, curve: Curves.easeOut)));

    _animationController.forward();
    _initializeApp();
  }

  Future<void> _initializeApp() async {
    _startProgressAnimation();

    // Run navigation logic and background services in parallel.
    final logicFuture = _performNavigationLogic();
    final backgroundServicesFuture = _initializeBackgroundServices();

    // Ensure the splash screen is visible for a minimum duration.
    final minTimeFuture = Future.delayed(const Duration(seconds: 3));

    // Wait for all tasks to complete.
    await Future.wait([logicFuture, backgroundServicesFuture, minTimeFuture]);
  }

  void _startProgressAnimation() {
    // Visual timer for the progress bar.
    const totalTime = 2800; // ms
    const interval = 50; // ms
    int elapsed = 0;

    _progressTimer =
        Timer.periodic(const Duration(milliseconds: interval), (timer) {
      elapsed += interval;
      progress.value = (elapsed / totalTime).clamp(0.0, 1.0);
      if (elapsed >= totalTime) timer.cancel();
    });
  }

  /// Initializes all heavy background services while the splash animation is running.
  Future<void> _initializeBackgroundServices() async {
    try {
      await EncryptionHelper.initialize();

      // --- [LAZY LOADING IN ACTION] ---
      // This `Get.find()` call will create the NotificationController instance
      // for the first time because it was defined with `lazyPut`.
      final notificationController = Get.find<NotificationController>();
      await notificationController.initNotifications();

      // The same happens for FirebaseMessagesController.
      final fcm = Get.find<FirebaseMessagesController>();
      await fcm.requestFirebaseMessagingPermission();

      _scheduleDailyNotifications(notificationController);
      _initializeQuickActions();
    } catch (e, st) {
      CRUD.addError('background_init_error: $e', st.toString(), 'SplashScreen');
    }
  }

  /// Determines the next screen based on user's login state.
  Future<void> _performNavigationLogic() async {
    await _getPackageInfo();
    SecureStorage().saveData('iss', 'mobile-app:');

    if (box.read(BoxName.onBoarding) == null) {
      Get.off(() => OnBoardingPage());
    } else if (box.read(BoxName.email) != null &&
        box.read(BoxName.phone) != null &&
        box.read(BoxName.isVerified) == '1') {
      // `Get.find()` creates the LoginController instance here.
      final loginController = Get.find<LoginController>();
      // The loginController itself will handle navigation via Get.offAll() upon success.
      await loginController.loginUsingCredentials(
        box.read(BoxName.passengerID).toString(),
        box.read(BoxName.email).toString(),
      );
    } else {
      Get.off(() => LoginPage());
    }
  }

  Future<void> _getPackageInfo() async {
    try {
      final info = await PackageInfo.fromPlatform();
      box.write(BoxName.packagInfo, info.version);
      update();
    } catch (e) {
      print("Could not get package info: $e");
    }
  }

  void _scheduleDailyNotifications(NotificationController controller) {
    try {
      final List<String> msgs = passengerMessages ?? const [];
      if (msgs.isEmpty) {
        controller.scheduleNotificationsForSevenDays(
            'Intaleq', 'مرحباً بك! تابع رحلاتك بأمان مع انطلق.', "tone1");
      } else {
        final rnd = Random();
        final raw = msgs[rnd.nextInt(msgs.length)];
        final parts = raw.split(':');
        final title = parts.isNotEmpty ? parts.first.trim() : 'Intaleq';
        final body = parts.length > 1
            ? parts.sublist(1).join(':').trim()
            : 'مرحباً بك! تابع رحلاتك بأمان مع انطلق.';
        controller.scheduleNotificationsForSevenDays(
            title.isEmpty ? 'Intaleq' : title,
            body.isEmpty ? 'مرحباً بك! تابع رحلاتك بأمان مع انطلق.' : body,
            "tone1");
      }
    } catch (e, st) {
      CRUD.addError('notif_init: $e', st.toString(), 'SplashScreen');
    }
  }

  void _initializeQuickActions() {
    final QuickActions quickActions = QuickActions();
    quickActions.initialize((String shortcutType) {
      Get.toNamed('/$shortcutType');
    });

    quickActions.setShortcutItems(<ShortcutItem>[
      ShortcutItem(
          type: 'shareApp', localizedTitle: 'Share App'.tr, icon: 'icon_share'),
      ShortcutItem(
          type: 'wallet', localizedTitle: 'Wallet'.tr, icon: 'icon_wallet'),
      ShortcutItem(
          type: 'profile', localizedTitle: 'Profile'.tr, icon: 'icon_user'),
      ShortcutItem(
          type: 'contactSupport',
          localizedTitle: 'Contact Support'.tr,
          icon: 'icon_support'),
    ]);
  }

  @override
  void onClose() {
    _progressTimer?.cancel();
    _animationController.dispose();
    super.onClose();
  }
}