import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../core/l10n/locale_provider.dart';
import '../../core/services/haptic_service.dart';
import 'provider.dart';
import 'widgets/onboarding_page.dart';
import 'widgets/onboarding_page_indicator.dart';

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

  @override
  ConsumerState<OnboardingScreen> createState() => _OnboardingScreenState();
}

class _OnboardingScreenState extends ConsumerState<OnboardingScreen> {
  final _controller = PageController();

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  void _onPageChanged(int page) {
    ref.read(onboardingProvider.notifier).setPage(page);
    HapticService.light();
    if (page == 4) {
      HapticService.medium();
      ref.read(onboardingProvider.notifier).complete();
      Future.delayed(const Duration(milliseconds: 400), () {
        if (mounted) context.go('/dashboard');
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    final s = ref.watch(stringsProvider);
    final currentPage = ref.watch(onboardingProvider);

    return Scaffold(
      body: SafeArea(
        child: Column(
          children: [
            Expanded(
              child: PageView(
                controller: _controller,
                onPageChanged: _onPageChanged,
                children: [
                  OnboardingPage.welcome(welcomeText: s.onboardingWelcome),
                  OnboardingPage.content(
                    icon: Icons.currency_exchange_rounded,
                    headline: s.onboardingMultiCurrencyTitle,
                    description: s.onboardingMultiCurrencyBody,
                  ),
                  OnboardingPage.content(
                    icon: Icons.credit_card_rounded,
                    headline: s.onboardingCardsTitle,
                    description: s.onboardingCardsBody,
                  ),
                  Center(
                    child: Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 32),
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Icon(
                            Icons.waving_hand_rounded,
                            size: 72,
                            color: Theme.of(context).colorScheme.primary,
                          ),
                          const SizedBox(height: 28),
                          Text(
                            s.onboardingReadyTitle,
                            textAlign: TextAlign.center,
                            style: Theme.of(context).textTheme.headlineMedium?.copyWith(
                                  fontWeight: FontWeight.bold,
                                  color: Theme.of(context).colorScheme.onSurface,
                                ),
                          ),
                          const SizedBox(height: 12),
                          Text(
                            s.onboardingReadyBody,
                            textAlign: TextAlign.center,
                            style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                                  color: Theme.of(context).colorScheme.onSurface.withOpacity(0.5),
                                ),
                          ),
                          const SizedBox(height: 24),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Text(
                                s.onboardingSwipeRight,
                                style: Theme.of(context).textTheme.titleMedium?.copyWith(
                                      color: Theme.of(context).colorScheme.primary,
                                      fontWeight: FontWeight.w600,
                                    ),
                              ),
                              const SizedBox(width: 8),
                              Icon(
                                Icons.arrow_forward_rounded,
                                color: Theme.of(context).colorScheme.primary,
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                  const SizedBox.shrink(),
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.only(bottom: 48),
              child: OnboardingPageIndicator(
                current: currentPage,
                count: 5,
              ),
            ),
          ],
        ),
      ),
    );
  }
}