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

import '../../../application/analytic/inventory_analytic_loader/inventory_analytic_loader_bloc.dart';
import '../../../common/theme/theme.dart';
import '../../../domain/analytic/analytic.dart';
import '../../../injection.dart';
import '../../components/appbar/appbar.dart';
import 'widgets/ingredient_tile.dart';
import 'widgets/product_tile.dart';
import 'widgets/stat_card.dart';
import 'widgets/tabbar_delegate.dart';

// Custom SliverPersistentHeaderDelegate untuk TabBar

@RoutePage()
class InventoryPage extends StatefulWidget implements AutoRouteWrapper {
  const InventoryPage({super.key});

  @override
  State<InventoryPage> createState() => _InventoryPageState();

  @override
  Widget wrappedRoute(BuildContext context) => BlocProvider(
    create: (_) =>
        getIt<InventoryAnalyticLoaderBloc>()
          ..add(InventoryAnalyticLoaderEvent.fetched()),
    child: this,
  );
}

class _InventoryPageState extends State<InventoryPage>
    with TickerProviderStateMixin {
  late AnimationController _fadeAnimationController;
  late AnimationController _slideAnimationController;
  late Animation<double> _fadeAnimation;
  late Animation<Offset> _slideAnimation;
  late TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 2, vsync: this);

    _fadeAnimationController = AnimationController(
      duration: const Duration(milliseconds: 1000),
      vsync: this,
    );
    _slideAnimationController = AnimationController(
      duration: const Duration(milliseconds: 800),
      vsync: this,
    );

    _fadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
      CurvedAnimation(
        parent: _fadeAnimationController,
        curve: Curves.easeInOut,
      ),
    );

    _slideAnimation =
        Tween<Offset>(begin: const Offset(0.0, 0.3), end: Offset.zero).animate(
          CurvedAnimation(
            parent: _slideAnimationController,
            curve: Curves.easeOutBack,
          ),
        );

    _fadeAnimationController.forward();
    _slideAnimationController.forward();
  }

  @override
  void dispose() {
    _fadeAnimationController.dispose();
    _slideAnimationController.dispose();
    _tabController.dispose();
    super.dispose();
  }

  Color getStatusColor(String status) {
    switch (status) {
      case 'available':
        return AppColor.success;
      case 'low_stock':
        return AppColor.warning;
      case 'out_of_stock':
        return AppColor.error;
      default:
        return AppColor.textSecondary;
    }
  }

  String getStatusText(String status) {
    switch (status) {
      case 'available':
        return 'Tersedia';
      case 'low_stock':
        return 'Stok Rendah';
      case 'out_of_stock':
        return 'Habis';
      default:
        return 'Unknown';
    }
  }

  @override
  Widget build(BuildContext context) {
    return BlocListener<
      InventoryAnalyticLoaderBloc,
      InventoryAnalyticLoaderState
    >(
      listenWhen: (previous, current) =>
          previous.dateFrom != current.dateFrom ||
          previous.dateTo != current.dateTo,
      listener: (context, state) {
        context.read<InventoryAnalyticLoaderBloc>().add(
          InventoryAnalyticLoaderEvent.fetched(),
        );
      },
      child: Scaffold(
        backgroundColor: AppColor.background,
        body:
            BlocBuilder<
              InventoryAnalyticLoaderBloc,
              InventoryAnalyticLoaderState
            >(
              builder: (context, state) {
                return FadeTransition(
                  opacity: _fadeAnimation,
                  child: SlideTransition(
                    position: _slideAnimation,
                    child: NestedScrollView(
                      headerSliverBuilder: (context, innerBoxIsScrolled) {
                        return [
                          _buildSliverAppBar(),
                          SliverPersistentHeader(
                            pinned: true,
                            delegate: InventorySliverTabBarDelegate(
                              startDate: state.dateFrom,
                              endDate: state.dateTo,
                              onDateRangeChanged: (startDate, endDate) {
                                context.read<InventoryAnalyticLoaderBloc>().add(
                                  InventoryAnalyticLoaderEvent.rangeDateChanged(
                                    startDate!,
                                    endDate!,
                                  ),
                                );
                              },
                              tabBar: TabBar(
                                controller: _tabController,
                                indicator: BoxDecoration(
                                  gradient: LinearGradient(
                                    colors: AppColor.primaryGradient,
                                    begin: Alignment.topLeft,
                                    end: Alignment.bottomRight,
                                  ),
                                  borderRadius: BorderRadius.circular(25),
                                  boxShadow: [
                                    BoxShadow(
                                      color: AppColor.primary.withOpacity(0.3),
                                      blurRadius: 12,
                                      offset: const Offset(0, 4),
                                    ),
                                  ],
                                ),
                                indicatorSize: TabBarIndicatorSize.tab,
                                indicatorPadding: const EdgeInsets.all(6),
                                labelColor: AppColor.textWhite,
                                unselectedLabelColor: AppColor.textSecondary,
                                labelStyle: const TextStyle(
                                  fontWeight: FontWeight.w700,
                                  fontSize: 13,
                                ),
                                unselectedLabelStyle: const TextStyle(
                                  fontWeight: FontWeight.w500,
                                  fontSize: 13,
                                ),
                                dividerColor: Colors.transparent,
                                splashFactory: NoSplash.splashFactory,
                                overlayColor: MaterialStateProperty.all(
                                  Colors.transparent,
                                ),
                                tabs: [
                                  Tab(
                                    height: 40,
                                    child: Container(
                                      padding: const EdgeInsets.symmetric(
                                        horizontal: 12,
                                      ),
                                      child: const Row(
                                        mainAxisSize: MainAxisSize.min,
                                        mainAxisAlignment:
                                            MainAxisAlignment.center,
                                        children: [
                                          Icon(
                                            Icons.inventory_2_rounded,
                                            size: 16,
                                          ),
                                          SizedBox(width: 6),
                                          Text('Produk'),
                                        ],
                                      ),
                                    ),
                                  ),
                                  Tab(
                                    height: 40,
                                    child: Container(
                                      padding: const EdgeInsets.symmetric(
                                        horizontal: 12,
                                      ),
                                      child: const Row(
                                        mainAxisSize: MainAxisSize.min,
                                        mainAxisAlignment:
                                            MainAxisAlignment.center,
                                        children: [
                                          Icon(
                                            Icons.restaurant_menu_rounded,
                                            size: 16,
                                          ),
                                          SizedBox(width: 6),
                                          Text('Bahan'),
                                        ],
                                      ),
                                    ),
                                  ),
                                ],
                              ),
                            ),
                          ),
                        ];
                      },
                      body: TabBarView(
                        controller: _tabController,
                        children: [
                          _buildProductTab(state.inventoryAnalytic),
                          _buildIngredientTab(state.inventoryAnalytic),
                        ],
                      ),
                    ),
                  ),
                );
              },
            ),
      ),
    );
  }

  Widget _buildSliverAppBar() {
    return SliverAppBar(
      expandedHeight: 120,
      floating: false,
      pinned: true,
      elevation: 0,
      backgroundColor: AppColor.primary,
      flexibleSpace: CustomAppBar(title: 'Inventaris'),
    );
  }

  Widget _buildProductTab(InventoryAnalytic inventoryAnalytic) {
    return CustomScrollView(
      slivers: [
        SliverToBoxAdapter(
          child: _buildProductStats(inventoryAnalytic.summary),
        ),
        SliverPadding(
          padding: const EdgeInsets.all(16),
          sliver: SliverList(
            delegate: SliverChildBuilderDelegate(
              (context, index) =>
                  InventoryProductTile(item: inventoryAnalytic.products[index]),
              childCount: inventoryAnalytic.products.length,
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildIngredientTab(InventoryAnalytic inventoryAnalytic) {
    return CustomScrollView(
      slivers: [
        SliverToBoxAdapter(
          child: _buildIngredientStats(inventoryAnalytic.summary),
        ),
        SliverPadding(
          padding: const EdgeInsets.all(16),
          sliver: SliverList(
            delegate: SliverChildBuilderDelegate(
              (context, index) => InventoryIngredientTile(
                item: inventoryAnalytic.ingredients[index],
              ),
              childCount: inventoryAnalytic.ingredients.length,
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildProductStats(InventorySummary inventory) {
    return Container(
      margin: const EdgeInsets.all(16),
      child: Column(
        children: [
          Row(
            children: [
              Expanded(
                child: _buildStatCard(
                  'Total Produk',
                  inventory.totalProducts.toString(),
                  Icons.inventory_2_rounded,
                  AppColor.primary,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: _buildStatCard(
                  'Produk Terjual',
                  inventory.totalSoldProducts.toString(),
                  Icons.check_circle_rounded,
                  AppColor.success,
                ),
              ),
            ],
          ),
          const SizedBox(height: 16),
          Row(
            children: [
              Expanded(
                child: _buildStatCard(
                  'Stok Rendah',
                  inventory.lowStockProducts.toString(),
                  Icons.warning_rounded,
                  AppColor.warning,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: _buildStatCard(
                  'Stok Kosong',
                  inventory.zeroStockProducts.toString(),
                  Icons.error_rounded,
                  AppColor.error,
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildIngredientStats(InventorySummary inventory) {
    return Container(
      margin: const EdgeInsets.all(16),
      child: Column(
        children: [
          Row(
            children: [
              Expanded(
                child: _buildStatCard(
                  'Total Bahan',
                  inventory.totalIngredients.toString(),
                  Icons.restaurant_menu_rounded,
                  AppColor.primary,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: _buildStatCard(
                  'Bahan Terjual',
                  inventory.totalSoldIngredients.toString(),
                  Icons.check_circle_rounded,
                  AppColor.success,
                ),
              ),
            ],
          ),
          const SizedBox(height: 16),
          Row(
            children: [
              Expanded(
                child: _buildStatCard(
                  'Stok Kurang',
                  inventory.lowStockIngredients.toString(),
                  Icons.warning_rounded,
                  AppColor.warning,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: _buildStatCard(
                  'Habis',
                  inventory.zeroStockIngredients.toString(),
                  Icons.error_rounded,
                  AppColor.error,
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildStatCard(
    String title,
    String value,
    IconData icon,
    Color color,
  ) {
    return TweenAnimationBuilder<double>(
      tween: Tween<double>(begin: 0, end: 1),
      duration: const Duration(milliseconds: 800),
      builder: (context, animationValue, child) {
        return Transform.scale(
          scale: animationValue,
          child: InventoryStatCard(
            title: title,
            value: value,
            icon: icon,
            color: color,
          ),
        );
      },
    );
  }
}