import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../application/auth_controller.dart';
import '../../onboarding/application/onboarding_controller.dart';
import '../../profile/application/profile_controller.dart';
import 'auth_showcase_screen.dart';
import '../../onboarding/presentation/onboarding_intro_screen.dart';
import '../../profile/presentation/profile_setup_screen.dart';
import '../../countdown/presentation/home_countdown_screen.dart';
import '../../../bootstrap/supabase_client.dart';

class AuthGate extends ConsumerStatefulWidget {
  const AuthGate({super.key});

  @override
  ConsumerState<AuthGate> createState() => _AuthGateState();
}

class _AuthGateState extends ConsumerState<AuthGate> {
  bool _isCheckingProfile = false;
  bool _profileSetupComplete = false;

  @override
  Widget build(BuildContext context) {
    final authState = ref.watch(authControllerProvider);
    final onboardingState = ref.watch(onboardingControllerProvider);

    // If no backend is configured and there is no overridden auth state,
    // keep the app usable by continuing through the local onboarding flow.
    if (supabaseClient == null && authState == null) {
      if (!onboardingState) {
        return const OnboardingIntroScreen();
      }
      return const HomeCountdownScreen();
    }

    if (authState == null) {
      return const AuthShowcaseScreen();
    }

    // If user is authenticated but hasn't completed onboarding
    if (!onboardingState) {
      return const OnboardingIntroScreen();
    }

    // Check if profile setup is complete
    if (!_isCheckingProfile && !_profileSetupComplete) {
      _isCheckingProfile = true;
      _checkProfileSetup(authState.id);
      return const Scaffold(body: Center(child: CircularProgressIndicator()));
    }

    // If profile setup is not complete, show profile setup screen
    if (!_profileSetupComplete) {
      return const ProfileSetupScreen();
    }

    // User is authenticated and has completed onboarding and profile setup
    return const HomeCountdownScreen();
  }

  Future<void> _checkProfileSetup(String userId) async {
    final isComplete = await ref.read(profileControllerProvider.notifier).isProfileSetupComplete(userId);
    if (mounted) {
      setState(() {
        _profileSetupComplete = isComplete;
        _isCheckingProfile = false;
      });
    }
  }
}