import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:sigap/src/cores/services/supabase_service.dart';
import 'package:sigap/src/features/daily-ops/presentasion/pages/patrol-unit/patrol_unit_screen.dart';
import 'package:sigap/src/features/explore/presentasion/pages/home-screen/home_screen.dart';
import 'package:sigap/src/features/map/presentasion/pages/map_screen.dart';
import 'package:sigap/src/features/notification/presentation/pages/notification_screen.dart';
import 'package:sigap/src/features/panic/presentation/pages/panic_button_page.dart';
import 'package:sigap/src/features/personalization/presentasion/pages/settings/setting_screen.dart';
import 'package:sigap/src/shared/widgets/navigation/custom_bottom_navigation_bar.dart';

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

  @override
  Widget build(BuildContext context) {
    // Ensure NavigationController is registered in a binding first, then use find
    final controller = Get.find<NavigationController>();
    final theme = Theme.of(context);

    return Scaffold(
      backgroundColor: theme.scaffoldBackgroundColor,
      body: Obx(
        () => IndexedStack(
          index: controller.selectedIndex.value,
          children: controller.getScreens(),
        ),
      ),
      bottomNavigationBar: const CustomBottomNavigationBar(),
    );
  }
}

class NavigationController extends GetxController {
  static NavigationController get instance => Get.find();

  // Observable variable to track the current selected index
  final Rx<int> selectedIndex = 2.obs; // Start with PanicButtonPage (index 2)

  final SupabaseService supabaseService;

  // Observable to track if user is an officer
  final RxBool isOfficer = false.obs;

  NavigationController({required this.supabaseService});

  @override
  void onInit() {
    super.onInit();
    _checkUserRole();

    // Listen to auth state changes to update role when login/logout happens
    supabaseService.client.auth.onAuthStateChange.listen((data) {
      _checkUserRole();
    });
  }

  // Check if the current user is an officer
  void _checkUserRole() {
    isOfficer.value = supabaseService.isOfficer;
  }

  // Get the appropriate screens based on user role
  List<Widget> getScreens() {
    final List<Widget> screens = [
      const HomeScreen(),
      const NotificationScreen(),
      const PanicButtonPage(),
      const MapScreen(),
    ];

    // Add PatrolUnitScreen only if user is an officer
    if (isOfficer.value) {
      screens.add(const PatrolUnitScreen());
    }

    // Always add the Settings screen at the end
    screens.add(const SettingsScreen());

    return screens;
  }

  // Method to change selected index
  void changeIndex(int index) {
    // Ensure the index is valid for the current user role
    if (index < getScreens().length) {
      selectedIndex.value = index;
    }
  }

  // Get the maximum index based on available screens
  int get maxIndex => getScreens().length - 1;

  // Check if a specific screen index should be visible
  bool isScreenVisible(int index) {
    // The PatrolUnit screen is at index 4
    if (index == 4) {
      return isOfficer.value;
    }
    return true;
  }
}