import 'package:auto_route/auto_route.dart';
import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';

import '../../../common/theme/theme.dart';
import '../../components/assets/assets.gen.dart';
import '../../components/button/button.dart';
import '../../components/image/image.dart';
import '../../router/app_router.gr.dart';

@RoutePage()
class OnboardingPage extends StatefulWidget {
  const OnboardingPage({super.key});

  @override
  State<OnboardingPage> createState() => _OnboardingPageState();
}

class _OnboardingPageState extends State<OnboardingPage> {
  int currentIndex = 0;
  final CarouselSliderController _carouselController =
      CarouselSliderController();

  final List<OnboardingData> onboardingData = [
    OnboardingData(
      image: Assets.images.onboarding1.path,
      title: 'Nikmati Hidangan Kapanpun, Dimanapun',
      subtitle:
          'Bebas pilih cara penyajian, bisa dine-in di restoran atau pesan antar langsung ke lokasimu',
    ),
    OnboardingData(
      image: Assets.images.onboarding2.path,
      title: 'Bahan Berkualitas Premium',
      subtitle:
          'Kami hanya menggunakan bahan segar pilihan untuk menghadirkan cita rasa terbaik di setiap hidangan',
    ),
    OnboardingData(
      image: Assets.images.onboarding3.path,
      title: 'Pesan dengan Praktis',
      subtitle:
          'Aplikasi dengan tampilan sederhana memudahkanmu memesan makanan favorit kapan saja',
    ),
  ];

  @override
  Widget build(BuildContext context) {
    final screenHeight = MediaQuery.of(context).size.height;
    final imageHeight = screenHeight * 0.6; // 60% dari tinggi layar

    return Scaffold(
      backgroundColor: Colors.white, // Changed to white background
      body: Column(
        children: [
          // Image carousel - 60% of screen height
          SizedBox(height: imageHeight, child: _buildImageCarousel()),

          // Bottom content - remaining space
          Expanded(child: _buildBottomContent()),
        ],
      ),
    );
  }

  Widget _buildImageCarousel() {
    return Stack(
      children: [
        // Carousel
        CarouselSlider.builder(
          carouselController: _carouselController,
          itemCount: onboardingData.length,
          itemBuilder: (context, index, realIndex) {
            return SizedBox(
              width: double.infinity, // Full width
              child: ClipRRect(
                child: Image.asset(
                  onboardingData[index].image,
                  fit: BoxFit.fill,
                  width: double.infinity,
                  errorBuilder: (context, error, stackTrace) {
                    return ImagePlaceholder();
                  },
                ),
              ),
            );
          },
          options: CarouselOptions(
            height: double.infinity,
            viewportFraction: 1.0,
            enableInfiniteScroll: true,
            autoPlay: true,
            onPageChanged: (index, reason) {
              setState(() {
                currentIndex = index;
              });
            },
          ),
        ),

        // White overlay gradient at bottom
        Positioned(
          bottom: 0,
          left: 0,
          right: 0,
          child: Container(
            height: 100,
            decoration: BoxDecoration(
              gradient: LinearGradient(
                begin: Alignment.topCenter,
                end: Alignment.bottomCenter,
                colors: [
                  Colors.white.withOpacity(0.1),
                  Color(0x80FFFFFF), // White with 50% opacity
                  Colors.white, // Pure white
                ],
              ),
            ),
          ),
        ),

        // Dots indicator positioned over the white overlay
        Positioned(
          bottom: 30,
          left: 0,
          right: 0,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: List.generate(
              onboardingData.length,
              (index) => Container(
                margin: const EdgeInsets.symmetric(horizontal: 4),
                height: 8,
                width: currentIndex == index ? 24 : 8,
                decoration: BoxDecoration(
                  color: currentIndex == index
                      ? AppColor.primary
                      : AppColor.borderLight,
                  borderRadius: BorderRadius.circular(4),
                ),
              ),
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildBottomContent() {
    return Padding(
      padding: const EdgeInsets.all(24),
      child: Column(
        children: [
          const SizedBox(height: 16),

          // Title
          Text(
            onboardingData[currentIndex].title,
            textAlign: TextAlign.center,
            style: AppStyle.xl.copyWith(fontWeight: FontWeight.w800),
          ),

          const SizedBox(height: 12),

          // Subtitle
          Text(
            onboardingData[currentIndex].subtitle,
            textAlign: TextAlign.center,
            style: AppStyle.md.copyWith(
              fontWeight: FontWeight.w500,
              color: AppColor.textSecondary,
            ),
          ),

          const Spacer(),

          AppElevatedButton(
            onPressed: () => context.router.push(const LoginRoute()),
            title: 'Masuk',
          ),

          const SizedBox(height: 12),

          TextButton(
            onPressed: () => context.router.push(const MainRoute()),
            child: Text(
              'Lewati tahap ini',
              style: AppStyle.md.copyWith(
                color: AppColor.textSecondary,
                fontWeight: FontWeight.w600,
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class OnboardingData {
  final String image;
  final String title;
  final String subtitle;

  OnboardingData({
    required this.image,
    required this.title,
    required this.subtitle,
  });
}