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/image/image.dart';
import '../../router/app_router.gr.dart';

// Models (simplified)
class DrawEvent {
  final String id;
  final String name;
  final String description;
  final int entryPoints;
  final String icon;
  final String imageUrl;
  final Color primaryColor;
  final String prize;
  final String prizeValue;
  final DateTime drawDate;
  final int totalParticipants;
  final int hadiah;
  final String status; // 'active', 'ended'
  final int minSpending;

  DrawEvent({
    required this.id,
    required this.name,
    required this.description,
    required this.entryPoints,
    required this.icon,
    required this.imageUrl,
    required this.primaryColor,
    required this.prize,
    required this.prizeValue,
    required this.drawDate,
    required this.totalParticipants,
    required this.hadiah,
    required this.status,
    required this.minSpending,
  });

  bool get isActive => status == 'active';
}

class UserEntry {
  final String drawId;
  final DateTime entryDate;

  UserEntry({required this.drawId, required this.entryDate});
}

class CarouselBanner {
  final String id;
  final String imageUrl;
  final String title;
  final String subtitle;
  final Color backgroundColor;

  CarouselBanner({
    required this.id,
    required this.imageUrl,
    required this.title,
    required this.subtitle,
    required this.backgroundColor,
  });
}

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

  @override
  State<DrawPage> createState() => _DrawPageState();
}

class _DrawPageState extends State<DrawPage> {
  final TextEditingController _dateFilterController = TextEditingController();
  final CarouselSliderController _carouselController =
      CarouselSliderController();
  final ScrollController _scrollController = ScrollController();

  int _currentBannerIndex = 0;
  DateTime? _selectedFilterDate;
  bool _isCollapsed = false;

  final List<UserEntry> userEntries = [
    UserEntry(
      drawId: "1",
      entryDate: DateTime.now().subtract(Duration(hours: 3)),
    ),
  ];

  final List<CarouselBanner> banners = [
    CarouselBanner(
      id: "1",
      imageUrl:
          "https://images.unsplash.com/photo-1610375461246-83df859d849d?w=800&h=400&fit=crop&crop=center",
      title: "Gebyar Undian Emas",
      subtitle: "Menangkan hadiah emas 3 gram!",
      backgroundColor: Color(0xFFFF6B6B),
    ),
    CarouselBanner(
      id: "2",
      imageUrl:
          "https://images.unsplash.com/photo-1592750475338-74b7b21085ab?w=800&h=400&fit=crop&crop=center",
      title: "Undian iPhone 15 Pro",
      subtitle: "Smartphone premium menanti Anda!",
      backgroundColor: Color(0xFF4ECDC4),
    ),
    CarouselBanner(
      id: "3",
      imageUrl:
          "https://images.unsplash.com/photo-1593640408182-31c70c8268f5?w=800&h=400&fit=crop&crop=center",
      title: "Undian Laptop Gaming",
      subtitle: "Laptop gaming terbaru untuk gamers!",
      backgroundColor: Color(0xFF45B7D1),
    ),
    CarouselBanner(
      id: "4",
      imageUrl:
          "https://images.unsplash.com/photo-1549298916-b41d501d3772?w=800&h=400&fit=crop&crop=center",
      title: "Undian Sneakers Limited",
      subtitle: "Sepatu branded edition terbatas!",
      backgroundColor: Color(0xFF96CEB4),
    ),
    CarouselBanner(
      id: "5",
      imageUrl:
          "https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?w=800&h=400&fit=crop&crop=center",
      title: "Undian Camera DSLR",
      subtitle: "Kamera profesional untuk fotografer!",
      backgroundColor: Color(0xFFFECEA8),
    ),
    CarouselBanner(
      id: "6",
      imageUrl:
          "https://images.unsplash.com/photo-1560472354-b33ff0c44a43?w=800&h=400&fit=crop&crop=center",
      title: "Undian Gaming Console",
      subtitle: "PlayStation 5 siap dimainkan!",
      backgroundColor: Color(0xFFFF9AA2),
    ),
    CarouselBanner(
      id: "7",
      imageUrl:
          "https://images.unsplash.com/photo-1512499617640-c74ae3a79d37?w=800&h=400&fit=crop&crop=center",
      title: "Undian Motor Sport",
      subtitle: "Motor sport impian Anda!",
      backgroundColor: Color(0xFFB5EAD7),
    ),
    CarouselBanner(
      id: "8",
      imageUrl:
          "https://images.unsplash.com/photo-1484704849700-f032a568e944?w=800&h=400&fit=crop&crop=center",
      title: "Undian Home Theater",
      subtitle: "Sistem audio premium untuk rumah!",
      backgroundColor: Color(0xFFC7CEDB),
    ),
    CarouselBanner(
      id: "9",
      imageUrl:
          "https://images.unsplash.com/photo-1434493789847-2f02dc6ca35d?w=800&h=400&fit=crop&crop=center",
      title: "Undian Luxury Watch",
      subtitle: "Jam tangan mewah Swiss Made!",
      backgroundColor: Color(0xFFFFB7B2),
    ),
    CarouselBanner(
      id: "10",
      imageUrl:
          "https://images.unsplash.com/photo-1558618666-fbd1c326d4a4?w=800&h=400&fit=crop&crop=center",
      title: "Undian Travel Voucher",
      subtitle: "Liburan gratis ke destinasi impian!",
      backgroundColor: Color(0xFFE2F0CB),
    ),
  ];

  final List<DrawEvent> drawEvents = [
    DrawEvent(
      id: "1",
      name: "Emas 3 Gram",
      description: "Gebyar Undian Enaklo\nMenangkan hadiah emas batangan",
      entryPoints: 0,
      icon: "👑",
      imageUrl:
          "https://images.unsplash.com/photo-1610375461246-83df859d849d?w=400&h=200&fit=crop&crop=center",
      primaryColor: AppColor.primary,
      prize: "Emas 3 Gram",
      prizeValue: "Rp 2.500.000",
      drawDate: DateTime.now().add(Duration(hours: 1, minutes: 20)),
      totalParticipants: 245,
      hadiah: 2,
      status: 'active',
      minSpending: 50000,
    ),
    DrawEvent(
      id: "2",
      name: "iPhone 15 Pro",
      description: "Undian Smartphone Premium\nDapatkan iPhone terbaru",
      entryPoints: 0,
      icon: "📱",
      imageUrl:
          "https://images.unsplash.com/photo-1592750475338-74b7b21085ab?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF007AFF),
      prize: "iPhone 15 Pro",
      prizeValue: "Rp 18.000.000",
      drawDate: DateTime.now().add(Duration(days: 2)),
      totalParticipants: 1456,
      hadiah: 1,
      status: 'active',
      minSpending: 100000,
    ),
    DrawEvent(
      id: "3",
      name: "Laptop Gaming",
      description: "Undian Laptop Gaming ROG\nPerforma tinggi untuk gaming",
      entryPoints: 0,
      icon: "💻",
      imageUrl:
          "https://images.unsplash.com/photo-1593640408182-31c70c8268f5?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFFFF4444),
      prize: "ROG Strix G15",
      prizeValue: "Rp 15.000.000",
      drawDate: DateTime.now().add(Duration(days: 5)),
      totalParticipants: 892,
      hadiah: 1,
      status: 'active',
      minSpending: 75000,
    ),
    DrawEvent(
      id: "4",
      name: "Sneakers Limited",
      description: "Undian Sepatu Nike Air Jordan\nEdition terbatas collectors",
      entryPoints: 0,
      icon: "👟",
      imageUrl:
          "https://images.unsplash.com/photo-1549298916-b41d501d3772?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF32CD32),
      prize: "Nike Air Jordan",
      prizeValue: "Rp 3.500.000",
      drawDate: DateTime.now().add(Duration(days: 3)),
      totalParticipants: 567,
      hadiah: 3,
      status: 'active',
      minSpending: 30000,
    ),
    DrawEvent(
      id: "5",
      name: "Camera DSLR",
      description:
          "Undian Kamera Canon EOS\nKamera profesional untuk fotografer",
      entryPoints: 0,
      icon: "📷",
      imageUrl:
          "https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF8B4513),
      prize: "Canon EOS R5",
      prizeValue: "Rp 25.000.000",
      drawDate: DateTime.now().add(Duration(days: 7)),
      totalParticipants: 334,
      hadiah: 1,
      status: 'active',
      minSpending: 150000,
    ),
    DrawEvent(
      id: "6",
      name: "PlayStation 5",
      description: "Undian Gaming Console\nPS5 bundle dengan 3 games",
      entryPoints: 0,
      icon: "🎮",
      imageUrl:
          "https://images.unsplash.com/photo-1560472354-b33ff0c44a43?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF0070D1),
      prize: "PlayStation 5",
      prizeValue: "Rp 8.500.000",
      drawDate: DateTime.now().add(Duration(days: 4)),
      totalParticipants: 1789,
      hadiah: 2,
      status: 'active',
      minSpending: 60000,
    ),
    DrawEvent(
      id: "7",
      name: "Motor Yamaha R15",
      description: "Undian Motor Sport\nYamaha R15 V4 warna special edition",
      entryPoints: 0,
      icon: "🏍️",
      imageUrl:
          "https://images.unsplash.com/photo-1512499617640-c74ae3a79d37?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFFDC143C),
      prize: "Yamaha R15 V4",
      prizeValue: "Rp 35.000.000",
      drawDate: DateTime.now().add(Duration(days: 10)),
      totalParticipants: 456,
      hadiah: 1,
      status: 'active',
      minSpending: 200000,
    ),
    DrawEvent(
      id: "8",
      name: "Home Theater",
      description: "Undian Sound System\nSony Home Theater 7.1 surround",
      entryPoints: 0,
      icon: "🔊",
      imageUrl:
          "https://images.unsplash.com/photo-1484704849700-f032a568e944?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF4B0082),
      prize: "Sony HT-A7000",
      prizeValue: "Rp 12.000.000",
      drawDate: DateTime.now().add(Duration(days: 6)),
      totalParticipants: 298,
      hadiah: 1,
      status: 'active',
      minSpending: 80000,
    ),
    DrawEvent(
      id: "9",
      name: "Luxury Watch",
      description: "Undian Jam Tangan Mewah\nRolex Submariner Swiss Made",
      entryPoints: 0,
      icon: "⌚",
      imageUrl:
          "https://images.unsplash.com/photo-1434493789847-2f02dc6ca35d?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFFB8860B),
      prize: "Rolex Submariner",
      prizeValue: "Rp 150.000.000",
      drawDate: DateTime.now().add(Duration(days: 14)),
      totalParticipants: 123,
      hadiah: 1,
      status: 'active',
      minSpending: 500000,
    ),
    DrawEvent(
      id: "10",
      name: "Travel Voucher Bali",
      description: "Undian Liburan Gratis\nPaket tour Bali 4D3N all inclusive",
      entryPoints: 0,
      icon: "✈️",
      imageUrl:
          "https://images.unsplash.com/photo-1558618666-fbd1c326d4a4?w=400&h=200&fit=crop&crop=center",
      primaryColor: Color(0xFF20B2AA),
      prize: "Bali Tour Package",
      prizeValue: "Rp 10.000.000",
      drawDate: DateTime.now().subtract(Duration(days: 2)),
      totalParticipants: 2156,
      hadiah: 5,
      status: 'ended',
      minSpending: 40000,
    ),
  ];

  @override
  void initState() {
    super.initState();
    _scrollController.addListener(_onScroll);
  }

  @override
  void dispose() {
    _dateFilterController.dispose();
    _scrollController.dispose();
    super.dispose();
  }

  void _onScroll() {
    final bool isCollapsed =
        _scrollController.hasClients &&
        _scrollController.offset > (280 - kToolbarHeight);

    if (_isCollapsed != isCollapsed) {
      setState(() {
        _isCollapsed = isCollapsed;
      });
    }
  }

  List<DrawEvent> get filteredDraws {
    List<DrawEvent> filtered = drawEvents;

    if (_selectedFilterDate != null) {
      filtered = filtered.where((draw) {
        return draw.drawDate.year == _selectedFilterDate!.year &&
            draw.drawDate.month == _selectedFilterDate!.month &&
            draw.drawDate.day == _selectedFilterDate!.day;
      }).toList();
    }

    return filtered;
  }

  String _getTimeRemaining(DateTime targetDate) {
    final now = DateTime.now();
    final difference = targetDate.difference(now);

    if (difference.isNegative) return "Berakhir";

    if (difference.inHours > 0) {
      return "${difference.inHours}h ${difference.inMinutes % 60}m";
    } else if (difference.inMinutes > 0) {
      return "${difference.inMinutes}m";
    } else {
      return "Sekarang!";
    }
  }

  Future<void> _selectDate() async {
    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: _selectedFilterDate ?? DateTime.now(),
      firstDate: DateTime.now().subtract(Duration(days: 365)),
      lastDate: DateTime.now().add(Duration(days: 365)),
    );

    if (picked != null) {
      setState(() {
        _selectedFilterDate = picked;
        _dateFilterController.text =
            "${picked.day}/${picked.month}/${picked.year}";
      });
    }
  }

  void _clearDateFilter() {
    setState(() {
      _selectedFilterDate = null;
      _dateFilterController.clear();
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColor.background,
      body: CustomScrollView(
        controller: _scrollController,
        slivers: [
          // SliverAppBar with Carousel Background
          SliverAppBar(
            expandedHeight: 280,
            floating: false,
            pinned: true,
            backgroundColor: AppColor.surface,
            leading: Container(
              margin: EdgeInsets.all(8),
              decoration: BoxDecoration(
                color: Colors.black.withOpacity(0.3),
                borderRadius: BorderRadius.circular(20),
              ),
              child: IconButton(
                icon: Icon(Icons.arrow_back, color: Colors.white),
                onPressed: () => Navigator.of(context).pop(),
              ),
            ),
            flexibleSpace: FlexibleSpaceBar(
              title: AnimatedOpacity(
                opacity: _isCollapsed ? 1.0 : 0.0,
                duration: Duration(milliseconds: 200),
                child: Text(
                  "Undian",
                  style: AppStyle.lg.copyWith(
                    fontWeight: FontWeight.w600,
                    color: AppColor.textPrimary,
                  ),
                ),
              ),
              titlePadding: EdgeInsets.only(left: 72, bottom: 16),
              collapseMode: CollapseMode.parallax,
              background: Stack(
                children: [
                  // Carousel Slider
                  Positioned.fill(
                    child: CarouselSlider.builder(
                      carouselController: _carouselController,
                      itemCount: banners.length,
                      options: CarouselOptions(
                        height: double.infinity,
                        viewportFraction: 1.0,
                        autoPlay: true,
                        autoPlayInterval: Duration(seconds: 4),
                        autoPlayAnimationDuration: Duration(milliseconds: 800),
                        onPageChanged: (index, reason) {
                          setState(() => _currentBannerIndex = index);
                        },
                      ),
                      itemBuilder: (context, index, realIndex) {
                        final banner = banners[index];
                        return GestureDetector(
                          onTap: () {
                            context.router.push(DrawDetailRoute());
                          },
                          child: AppNetworkImage(url: banner.imageUrl),
                        );
                      },
                    ),
                  ),

                  // Page indicators
                  Positioned(
                    bottom: 20,
                    left: 0,
                    right: 0,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: banners.asMap().entries.map((entry) {
                        return GestureDetector(
                          onTap: () =>
                              _carouselController.animateToPage(entry.key),
                          child: Container(
                            width: _currentBannerIndex == entry.key ? 24 : 8,
                            height: 8,
                            margin: EdgeInsets.symmetric(horizontal: 4),
                            decoration: BoxDecoration(
                              borderRadius: BorderRadius.circular(4),
                              color: _currentBannerIndex == entry.key
                                  ? Colors.white
                                  : Colors.white.withOpacity(0.4),
                            ),
                          ),
                        );
                      }).toList(),
                    ),
                  ),
                ],
              ),
            ),
          ),

          // Date Filter
          SliverToBoxAdapter(
            child: Container(
              margin: EdgeInsets.all(16),
              child: TextFormField(
                controller: _dateFilterController,
                readOnly: true,
                onTap: _selectDate,
                decoration: InputDecoration(
                  hintText: "Filter berdasarkan tanggal",
                  hintStyle: AppStyle.md.copyWith(
                    color: AppColor.textSecondary,
                  ),
                  prefixIcon: Icon(
                    Icons.calendar_today,
                    color: AppColor.textSecondary,
                  ),
                  suffixIcon: _selectedFilterDate != null
                      ? IconButton(
                          icon: Icon(
                            Icons.clear,
                            color: AppColor.textSecondary,
                          ),
                          onPressed: _clearDateFilter,
                        )
                      : null,
                  border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12),
                    borderSide: BorderSide(color: AppColor.border),
                  ),
                  enabledBorder: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12),
                    borderSide: BorderSide(color: AppColor.border),
                  ),
                  focusedBorder: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12),
                    borderSide: BorderSide(color: AppColor.primary, width: 2),
                  ),
                  filled: true,
                  fillColor: AppColor.surface,
                  contentPadding: EdgeInsets.symmetric(
                    horizontal: 16,
                    vertical: 14,
                  ),
                ),
                style: AppStyle.md.copyWith(color: AppColor.textPrimary),
              ),
            ),
          ),

          // Draw List Header
          SliverToBoxAdapter(
            child: Padding(
              padding: EdgeInsets.symmetric(horizontal: 16, vertical: 8),
              child: Text(
                "Daftar Undian (${filteredDraws.length})",
                style: AppStyle.lg.copyWith(
                  fontWeight: FontWeight.w600,
                  color: AppColor.textPrimary,
                ),
              ),
            ),
          ),

          // Draw List
          SliverList(
            delegate: SliverChildBuilderDelegate((context, index) {
              final draw = filteredDraws[index];
              return Container(
                margin: EdgeInsets.symmetric(horizontal: 16, vertical: 4),
                child: _buildSimpleDrawCard(draw),
              );
            }, childCount: filteredDraws.length),
          ),

          // Bottom padding
          SliverToBoxAdapter(child: SizedBox(height: 100)),
        ],
      ),
    );
  }

  Widget _buildSimpleDrawCard(DrawEvent draw) {
    final timeRemaining = _getTimeRemaining(draw.drawDate);

    return GestureDetector(
      onTap: () => context.router.push(DrawDetailRoute()),
      child: Container(
        margin: EdgeInsets.only(bottom: 8),
        padding: EdgeInsets.all(16),
        decoration: BoxDecoration(
          gradient: LinearGradient(
            colors: [draw.primaryColor, draw.primaryColor.withOpacity(0.8)],
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
          borderRadius: BorderRadius.circular(12),
          boxShadow: [
            BoxShadow(
              color: AppColor.black.withOpacity(0.08),
              blurRadius: 8,
              offset: Offset(0, 2),
            ),
          ],
        ),
        child: Row(
          children: [
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  // Name
                  Text(
                    draw.name,
                    style: AppStyle.lg.copyWith(
                      fontWeight: FontWeight.w600,
                      color: AppColor.textWhite,
                    ),
                  ),
                  SizedBox(height: 6),
                  // Description
                  Text(
                    draw.description,
                    style: AppStyle.sm.copyWith(
                      color: AppColor.textWhite.withOpacity(0.9),
                    ),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                  SizedBox(height: 8),
                  // Date and participants
                  Row(
                    children: [
                      Icon(
                        Icons.access_time,
                        size: 16,
                        color: AppColor.textWhite.withOpacity(0.8),
                      ),
                      SizedBox(width: 4),
                      Text(
                        draw.isActive ? "Berakhir: $timeRemaining" : "Selesai",
                        style: AppStyle.xs.copyWith(
                          color: AppColor.textWhite.withOpacity(0.8),
                          fontWeight: FontWeight.w500,
                        ),
                      ),
                      SizedBox(width: 16),
                      Icon(
                        Icons.people,
                        size: 16,
                        color: AppColor.textWhite.withOpacity(0.8),
                      ),
                      SizedBox(width: 4),
                      Text(
                        "${draw.totalParticipants}",
                        style: AppStyle.xs.copyWith(
                          color: AppColor.textWhite.withOpacity(0.8),
                          fontWeight: FontWeight.w500,
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
            // Prize info
            Column(
              crossAxisAlignment: CrossAxisAlignment.end,
              children: [
                Text(draw.icon, style: TextStyle(fontSize: 28)),
                SizedBox(height: 4),
                Text(
                  draw.prize,
                  style: AppStyle.sm.copyWith(
                    fontWeight: FontWeight.bold,
                    color: AppColor.textWhite,
                  ),
                ),
                Text(
                  draw.prizeValue,
                  style: AppStyle.xs.copyWith(
                    color: AppColor.textWhite.withOpacity(0.8),
                    fontWeight: FontWeight.w500,
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}