import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:intl/intl.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:barber_app/core/database/database_service.dart';
import 'package:barber_app/core/theme/app_theme.dart';
import 'package:barber_app/features/auth/presentation/bloc/auth_bloc.dart';
import 'package:barber_app/features/finances/data/repositories/transaction_repository.dart';
import 'package:barber_app/features/haircuts/data/models/haircut_model.dart';
import 'package:barber_app/features/products/data/models/product_model.dart';
import 'package:barber_app/features/finances/data/models/transaction_model.dart';
import 'package:barber_app/features/haircuts/presentation/pages/haircuts_page.dart';
import 'package:barber_app/features/products/presentation/pages/products_page.dart';
import 'package:barber_app/features/finances/presentation/pages/finances_page.dart';
import 'package:barber_app/features/settings/presentation/pages/settings_page.dart';
import 'package:barber_app/shared/widgets/stat_card.dart';
import 'package:barber_app/features/home/presentation/widgets/revenue_chart_new.dart';

class HomePage extends StatefulWidget {
  const HomePage({super.key});

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  int _currentIndex = 0;

  final List<Widget> _pages = [
    const HomeContent(),
    const HaircutsPage(),
    const ProductsPage(),
    const FinancesPage(),
    const SettingsPage(),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      extendBody: true, // Importante para a barra flutuante
      body: IndexedStack(index: _currentIndex, children: _pages),
      bottomNavigationBar: Container(
        margin: const EdgeInsets.fromLTRB(24, 0, 24, 30),
        // height: 70, // REMOVIDO: Altura fixa causava overflow. O child define a altura.
        constraints: const BoxConstraints(maxHeight: 100),
        decoration: BoxDecoration(
          color: AppColors.surface.withAlpha(230),
          borderRadius: BorderRadius.circular(35),
          border: Border.all(color: Colors.white.withAlpha(20), width: 1),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withAlpha(100),
              blurRadius: 20,
              offset: const Offset(0, 10),
            ),
          ],
        ),
        child: ClipRRect(
          borderRadius: BorderRadius.circular(35),
          child: Theme(
            data: Theme.of(context).copyWith(
              splashColor: Colors.transparent,
              highlightColor: Colors.transparent,
            ),
            child: MediaQuery.removePadding(
              context: context,
              removeBottom: true,
              child: BottomNavigationBar(
                currentIndex: _currentIndex,
                onTap: (index) => setState(() => _currentIndex = index),
                backgroundColor: Colors.transparent,
                elevation: 0,
                selectedItemColor: AppColors.primaryColor,
                unselectedItemColor: AppColors.textSecondary,
                type: BottomNavigationBarType.fixed,
                showSelectedLabels: false,
                showUnselectedLabels: false,
                items: const [
                  BottomNavigationBarItem(
                    icon: Icon(Icons.grid_view_rounded),
                    activeIcon: Icon(Icons.grid_view_rounded),
                    label: 'Início',
                  ),
                  BottomNavigationBarItem(
                    icon: Icon(Icons.content_cut_rounded),
                    label: 'Cortes',
                  ),
                  BottomNavigationBarItem(
                    icon: Icon(Icons.inventory_2_rounded),
                    label: 'Produtos',
                  ),
                  BottomNavigationBarItem(
                    icon: Icon(Icons.account_balance_wallet_rounded),
                    label: 'Finanças',
                  ),
                  BottomNavigationBarItem(
                    icon: Icon(Icons.tune_rounded),
                    label: 'Ajustes',
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}

class HomeContent extends StatefulWidget {
  const HomeContent({super.key});

  @override
  State<HomeContent> createState() => _HomeContentState();
}

class _HomeContentState extends State<HomeContent> {
  late TransactionRepository _transactionRepo;
  late NumberFormat _currencyFormat;

  @override
  void initState() {
    super.initState();
    _transactionRepo = TransactionRepository();
    _currencyFormat = NumberFormat.currency(locale: 'pt_BR', symbol: 'R\$');
  }

  @override
  Widget build(BuildContext context) {
    final user = context.watch<AuthBloc>().state is AuthAuthenticated
        ? (context.watch<AuthBloc>().state as AuthAuthenticated).user
        : null;

    return ValueListenableBuilder(
      valueListenable: DatabaseService.transactionsBoxInstance.listenable(),
      builder: (context, Box<TransactionModel> box, _) {
        final transactions = _transactionRepo
            .getAllTransactions()
            .where(
              (t) =>
                  t.createdAt.day == DateTime.now().day &&
                  t.createdAt.month == DateTime.now().month &&
                  t.createdAt.year == DateTime.now().year,
            )
            .toList();

        final totalBalance = _transactionRepo.getBalance();
        final todayRevenue = transactions
            .where((t) => t.type == TransactionType.revenue)
            .fold(0.0, (sum, t) => sum + t.amount);

        return ValueListenableBuilder(
          valueListenable: DatabaseService.haircutsBoxInstance.listenable(),
          builder: (context, Box<HaircutModel> haircutBox, _) {
            final todayHaircuts = haircutBox.values
                .where(
                  (h) =>
                      h.userId == user?.id &&
                      h.dateTime.day == DateTime.now().day &&
                      h.dateTime.month == DateTime.now().month &&
                      h.dateTime.year == DateTime.now().year,
                )
                .toList();

            return ValueListenableBuilder(
              valueListenable: DatabaseService.productsBoxInstance.listenable(),
              builder: (context, Box<ProductModel> productBox, _) {
                final lowStockProducts = productBox.values
                    .where(
                      (p) => p.userId == user?.id && p.quantity <= p.minStock,
                    )
                    .toList();

                final pendingReceivables = _transactionRepo
                    .getPendingReceivables();

                return Container(
                  color: AppColors.background,
                  child: CustomScrollView(
                    physics: const BouncingScrollPhysics(),
                    slivers: [
                      // Header Imersivo sem AppBar
                      SliverToBoxAdapter(
                        child: Padding(
                          padding: const EdgeInsets.fromLTRB(24, 60, 24, 20),
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.spaceBetween,
                            children: [
                              Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: [
                                  Text(
                                    'BOM DIA, ${(user?.barberName ?? "BARBEIRO").toUpperCase()}',
                                    style: TextStyle(
                                      fontSize: 10,
                                      color: AppColors.primaryColor,
                                      fontWeight: FontWeight.w900,
                                      letterSpacing: 2,
                                    ),
                                  ),
                                  const SizedBox(height: 4),
                                  Text(
                                    DatabaseService.settingsBoxInstance
                                            .get(user?.id)
                                            ?.appName ??
                                        user?.barberShopName ??
                                        'Barber App',
                                    style: Theme.of(context)
                                        .textTheme
                                        .displayLarge
                                        ?.copyWith(fontSize: 28),
                                  ),
                                ],
                              ),
                              Container(
                                decoration: BoxDecoration(
                                  shape: BoxShape.circle,
                                  border: Border.all(
                                    color: Colors.white.withAlpha(20),
                                    width: 1,
                                  ),
                                ),
                                child: IconButton(
                                  icon: const Icon(
                                    Icons.notifications_none_rounded,
                                    size: 28,
                                  ),
                                  onPressed: () => _showNotifications(
                                    context,
                                    lowStockProducts,
                                    pendingReceivables,
                                  ),
                                ),
                              ),
                            ],
                          ),
                        ),
                      ),

                      // Card Principal Estilo FinTech Elite
                      SliverToBoxAdapter(
                        child: Padding(
                          padding: const EdgeInsets.symmetric(horizontal: 24),
                          child: GestureDetector(
                            onTap: () {
                              final homeState = context
                                  .findAncestorStateOfType<_HomePageState>();
                              if (homeState != null) {
                                homeState.setState(
                                  () => homeState._currentIndex = 3,
                                );
                              }
                            },
                            child: Container(
                              height: 200,
                              width: double.infinity,
                              decoration: BoxDecoration(
                                gradient: LinearGradient(
                                  colors: [
                                    AppColors.surfaceLight,
                                    AppColors.surface,
                                  ],
                                  begin: Alignment.topLeft,
                                  end: Alignment.bottomRight,
                                ),
                                borderRadius: BorderRadius.circular(36),
                                border: Border.all(
                                  color: Colors.white.withAlpha(10),
                                  width: 1,
                                ),
                                boxShadow: AppColors.premiumShadow,
                              ),
                              child: Stack(
                                children: [
                                  Positioned(
                                    right: -30,
                                    top: -30,
                                    child: Icon(
                                      Icons.account_balance_wallet_rounded,
                                      size: 180,
                                      color: AppColors.primaryColor.withAlpha(
                                        10,
                                      ),
                                    ),
                                  ),
                                  Padding(
                                    padding: const EdgeInsets.all(32),
                                    child: Column(
                                      crossAxisAlignment:
                                          CrossAxisAlignment.start,
                                      mainAxisAlignment:
                                          MainAxisAlignment.center,
                                      children: [
                                        Text(
                                          'SALDO TOTAL',
                                          style: TextStyle(
                                            color: AppColors.textSecondary,
                                            fontWeight: FontWeight.w900,
                                            fontSize: 12,
                                            letterSpacing: 1.5,
                                          ),
                                        ),
                                        const SizedBox(height: 8),
                                        Text(
                                          _currencyFormat.format(totalBalance),
                                          style: TextStyle(
                                            fontSize: 42,
                                            fontWeight: FontWeight.w900,
                                            color: AppColors.textPrimary,
                                            fontFamily: 'Outfit',
                                            letterSpacing: -1,
                                          ),
                                        ),
                                        const SizedBox(height: 12),
                                        Container(
                                          padding: const EdgeInsets.symmetric(
                                            horizontal: 14,
                                            vertical: 8,
                                          ),
                                          decoration: BoxDecoration(
                                            color: AppColors.success.withAlpha(
                                              20,
                                            ),
                                            borderRadius: BorderRadius.circular(
                                              100,
                                            ),
                                            border: Border.all(
                                              color: AppColors.success
                                                  .withAlpha(40),
                                              width: 1,
                                            ),
                                          ),
                                          child: Row(
                                            mainAxisSize: MainAxisSize.min,
                                            children: [
                                              const Icon(
                                                Icons.trending_up_rounded,
                                                size: 14,
                                                color: AppColors.success,
                                              ),
                                              const SizedBox(width: 6),
                                              Text(
                                                '${_currencyFormat.format(todayRevenue)} HOJE',
                                                style: const TextStyle(
                                                  color: AppColors.success,
                                                  fontWeight: FontWeight.w900,
                                                  fontSize: 10,
                                                ),
                                              ),
                                            ],
                                          ),
                                        ),
                                      ],
                                    ),
                                  ),
                                ],
                              ),
                            ),
                          ),
                        ),
                      ),

                      // Atalhos de Ação Rápida
                      SliverPadding(
                        padding: const EdgeInsets.all(24),
                        sliver: SliverToBoxAdapter(
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.spaceBetween,
                            children: [
                              _buildActionButton(
                                context,
                                'NOVO CORTE',
                                Icons.add_rounded,
                                () {
                                  final homeState = context
                                      .findAncestorStateOfType<
                                        _HomePageState
                                      >();
                                  if (homeState != null) {
                                    homeState.setState(
                                      () => homeState._currentIndex = 1,
                                    );
                                  }
                                },
                              ),
                              const SizedBox(width: 16),
                              _buildActionButton(
                                context,
                                'PRODUTO',
                                Icons.inventory_2_rounded,
                                () {
                                  final homeState = context
                                      .findAncestorStateOfType<
                                        _HomePageState
                                      >();
                                  if (homeState != null) {
                                    homeState.setState(
                                      () => homeState._currentIndex = 2,
                                    );
                                  }
                                },
                              ),
                            ],
                          ),
                        ),
                      ),

                      // Grid de Métricas
                      SliverPadding(
                        padding: const EdgeInsets.symmetric(horizontal: 24),
                        sliver: SliverToBoxAdapter(
                          child: Row(
                            children: [
                              Expanded(
                                child: StatCard(
                                  title: 'Cortes Hoje',
                                  value: todayHaircuts.length.toString(),
                                  icon: Icons.content_cut_rounded,
                                  isPrimary: true, // Agora todos são premium
                                ),
                              ),
                              const SizedBox(width: 16),
                              Expanded(
                                child: StatCard(
                                  title: 'A Receber',
                                  value: _currencyFormat.format(
                                    pendingReceivables,
                                  ),
                                  icon: Icons.timer_outlined,
                                  isPrimary: false,
                                  iconColor: AppColors.warning,
                                ),
                              ),
                            ],
                          ),
                        ),
                      ),

                      SliverToBoxAdapter(
                        child: Padding(
                          padding: const EdgeInsets.all(24),
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              const Text(
                                'DESEMPENHO SEMANAL',
                                style: TextStyle(
                                  fontSize: 12,
                                  fontWeight: FontWeight.w900,
                                  color: AppColors.textSecondary,
                                  letterSpacing: 1.5,
                                ),
                              ),
                              const SizedBox(height: 20),
                              Container(
                                height: 240,
                                padding: const EdgeInsets.all(20),
                                decoration: BoxDecoration(
                                  color: AppColors.surface,
                                  borderRadius: BorderRadius.circular(32),
                                  border: Border.all(
                                    color: Colors.white.withAlpha(10),
                                    width: 1,
                                  ),
                                ),
                                child: const RevenueChartNew(),
                              ),
                              const SizedBox(
                                height: 120,
                              ), // Espaço para a navbar flutuante
                            ],
                          ),
                        ),
                      ),
                    ],
                  ),
                );
              },
            );
          },
        );
      },
    );
  }

  Widget _buildActionButton(
    BuildContext context,
    String label,
    IconData icon,
    VoidCallback onTap,
  ) {
    return Expanded(
      child: GestureDetector(
        onTap: onTap,
        child: Container(
          padding: const EdgeInsets.symmetric(vertical: 20),
          decoration: BoxDecoration(
            color: AppColors.surface,
            borderRadius: BorderRadius.circular(24),
            border: Border.all(color: Colors.white.withAlpha(10), width: 1),
          ),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Icon(icon, size: 20, color: AppColors.primaryColor),
              const SizedBox(width: 10),
              Flexible(
                child: Text(
                  label,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(
                    fontWeight: FontWeight.w900,
                    fontSize: 11,
                    fontFamily: 'Outfit',
                    letterSpacing: 1,
                    color: AppColors.textPrimary,
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  void _showNotifications(
    BuildContext context,
    List<ProductModel> lowStock,
    double pending,
  ) {
    showModalBottomSheet(
      context: context,
      backgroundColor: AppColors.surface,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(32)),
      ),
      builder: (context) {
        return Container(
          padding: const EdgeInsets.all(32),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text(
                'Notificações',
                style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 24),
              if (lowStock.isEmpty && pending == 0)
                const Center(child: Text('Tudo sob controle!')),
              if (lowStock.isNotEmpty)
                ListTile(
                  leading: const Icon(
                    Icons.inventory_2,
                    color: AppColors.error,
                  ),
                  title: Text('${lowStock.length} produtos em estoque baixo'),
                  subtitle: const Text('Verifique seu inventário'),
                ),
              if (pending > 0)
                ListTile(
                  leading: const Icon(
                    Icons.attach_money,
                    color: AppColors.warning,
                  ),
                  title: const Text('Valores pendentes'),
                  subtitle: Text(_currencyFormat.format(pending)),
                ),
              const SizedBox(height: 32),
            ],
          ),
        );
      },
    );
  }
}