import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get/get_core/src/get_main.dart';
import 'package:youmazgestion/Models/Remise.dart';
import 'package:youmazgestion/Models/produit.dart';
import 'package:youmazgestion/Services/stock_managementDatabase.dart';

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

  @override
  _GiftSelectionDialogState createState() => _GiftSelectionDialogState();
}

class _GiftSelectionDialogState extends State<GiftSelectionDialog> {
  final AppDatabase _database = AppDatabase.instance;
  final _searchController = TextEditingController();
  List<Product> _products = [];
  List<Product> _filteredProducts = [];
  bool _isLoading = true;
  String? _selectedCategory;

  @override
  void initState() {
    super.initState();
    _loadProducts();
    _searchController.addListener(_filterProducts);
  }

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

  Future<void> _loadProducts() async {
    try {
      final products = await _database.getProducts();
      setState(() {
        _products = products.where((p) => p.stock > 0).toList(); // Seulement les produits en stock
        _filteredProducts = _products;
        _isLoading = false;
      });
    } catch (e) {
      setState(() => _isLoading = false);
      Get.snackbar(
        'Erreur',
        'Impossible de charger les produits',
        snackPosition: SnackPosition.BOTTOM,
        backgroundColor: Colors.red,
        colorText: Colors.white,
      );
    }
  }

  void _filterProducts() {
    final query = _searchController.text.toLowerCase();
    setState(() {
      _filteredProducts = _products.where((product) {
        final matchesSearch = product.name.toLowerCase().contains(query) ||
            (product.reference?.toLowerCase().contains(query) ?? false) ||
            (product.imei?.toLowerCase().contains(query) ?? false);
        
        final matchesCategory = _selectedCategory == null || 
            product.category == _selectedCategory;
        
        return matchesSearch && matchesCategory;
      }).toList();
    });
  }

  void _selectGift(Product product) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Row(
          children: [
            Icon(Icons.card_giftcard, color: Colors.purple.shade600),
            const SizedBox(width: 8),
            const Text('Confirmer le cadeau'),
          ],
        ),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Text('Produit sélectionné:', style: TextStyle(fontWeight: FontWeight.bold)),
            const SizedBox(height: 8),
            Container(
              padding: const EdgeInsets.all(12),
              decoration: BoxDecoration(
                color: Colors.purple.shade50,
                borderRadius: BorderRadius.circular(8),
                border: Border.all(color: Colors.purple.shade200),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    product.name,
                    style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16),
                  ),
                  if (product.reference != null && product.reference!.isNotEmpty)
                    Text('Référence: ${product.reference}'),
                  if (product.category.isNotEmpty)
                    Text('Catégorie: ${product.category}'),
                  Text('Prix normal: ${product.price.toStringAsFixed(0)} MGA'),
                  Text('Stock disponible: ${product.stock}'),
                ],
              ),
            ),
            const SizedBox(height: 16),
            const Text(
              'Ce produit sera ajouté à la commande avec un prix de 0 MGA.',
              style: TextStyle(fontSize: 14, color: Colors.grey),
            ),
          ],
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Annuler'),
          ),
          ElevatedButton(
            onPressed: () {
              Navigator.pop(context); // Fermer ce dialogue
              Navigator.pop(context, ProduitCadeau(produit: product)); // Retourner le produit
            },
            style: ElevatedButton.styleFrom(
              backgroundColor: Colors.purple.shade600,
              foregroundColor: Colors.white,
            ),
            child: const Text('Confirmer le cadeau'),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final categories = _products.map((p) => p.category).toSet().toList()..sort();

    return Dialog(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
      child: Container(
        width: MediaQuery.of(context).size.width * 0.9,
        height: MediaQuery.of(context).size.height * 0.8,
        padding: const EdgeInsets.all(20),
        child: Column(
          children: [
            // En-tête
            Row(
              children: [
                Icon(Icons.card_giftcard, color: Colors.purple.shade600, size: 28),
                const SizedBox(width: 12),
                const Expanded(
                  child: Text(
                    'Choisir un cadeau',
                    style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
                  ),
                ),
                IconButton(
                  onPressed: () => Navigator.pop(context),
                  icon: const Icon(Icons.close),
                ),
              ],
            ),
            const SizedBox(height: 16),

            // Barre de recherche
            TextField(
              controller: _searchController,
              decoration: InputDecoration(
                labelText: 'Rechercher un produit',
                prefixIcon: const Icon(Icons.search),
                border: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(12),
                ),
              ),
            ),
            const SizedBox(height: 12),

            // Filtre par catégorie
            Container(
              height: 50,
              child: ListView(
                scrollDirection: Axis.horizontal,
                children: [
                  FilterChip(
                    label: const Text('Toutes'),
                    selected: _selectedCategory == null,
                    onSelected: (selected) {
                      setState(() {
                        _selectedCategory = null;
                        _filterProducts();
                      });
                    },
                  ),
                  const SizedBox(width: 8),
                  ...categories.map((category) => Padding(
                    padding: const EdgeInsets.only(right: 8),
                    child: FilterChip(
                      label: Text(category),
                      selected: _selectedCategory == category,
                      onSelected: (selected) {
                        setState(() {
                          _selectedCategory = selected ? category : null;
                          _filterProducts();
                        });
                      },
                    ),
                  )),
                ],
              ),
            ),
            const SizedBox(height: 16),

            // Liste des produits
            Expanded(
              child: _isLoading
                  ? const Center(child: CircularProgressIndicator())
                  : _filteredProducts.isEmpty
                      ? Center(
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Icon(
                                Icons.inventory_2_outlined,
                                size: 64,
                                color: Colors.grey.shade400,
                              ),
                              const SizedBox(height: 16),
                              Text(
                                'Aucun produit disponible',
                                style: TextStyle(
                                  fontSize: 18,
                                  color: Colors.grey.shade600,
                                ),
                              ),
                              const SizedBox(height: 8),
                              Text(
                                'Essayez de modifier vos critères de recherche',
                                style: TextStyle(
                                  fontSize: 14,
                                  color: Colors.grey.shade500,
                                ),
                              ),
                            ],
                          ),
                        )
                      : ListView.builder(
                          itemCount: _filteredProducts.length,
                          itemBuilder: (context, index) {
                            final product = _filteredProducts[index];
                            return Card(
                              margin: const EdgeInsets.only(bottom: 8),
                              elevation: 2,
                              shape: RoundedRectangleBorder(
                                borderRadius: BorderRadius.circular(12),
                              ),
                              child: ListTile(
                                contentPadding: const EdgeInsets.all(12),
                                leading: Container(
                                  width: 60,
                                  height: 60,
                                  decoration: BoxDecoration(
                                    color: Colors.purple.shade50,
                                    borderRadius: BorderRadius.circular(8),
                                    border: Border.all(color: Colors.purple.shade200),
                                  ),
                                  child: product.image != null && product.image!.isNotEmpty
                                      ? ClipRRect(
                                          borderRadius: BorderRadius.circular(8),
                                          child: Image.network(
                                            product.image!,
                                            fit: BoxFit.cover,
                                            errorBuilder: (context, error, stackTrace) =>
                                                Icon(Icons.image_not_supported, 
                                                     color: Colors.purple.shade300),
                                          ),
                                        )
                                      : Icon(Icons.card_giftcard, 
                                             color: Colors.purple.shade400, size: 30),
                                ),
                                title: Text(
                                  product.name,
                                  style: const TextStyle(fontWeight: FontWeight.bold),
                                ),
                                subtitle: Column(
                                  crossAxisAlignment: CrossAxisAlignment.start,
                                  children: [
                                    if (product.reference != null && product.reference!.isNotEmpty)
                                      Text('Ref: ${product.reference}'),
                                    Text('Catégorie: ${product.category}'),
                                    Text(
                                      'Prix: ${product.price.toStringAsFixed(0)} MGA',
                                      style: TextStyle(
                                        color: Colors.green.shade600,
                                        fontWeight: FontWeight.w600,
                                      ),
                                    ),
                                  ],
                                ),
                                trailing: Column(
                                  mainAxisAlignment: MainAxisAlignment.center,
                                  children: [
                                    Container(
                                      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                                      decoration: BoxDecoration(
                                        color: Colors.green.shade100,
                                        borderRadius: BorderRadius.circular(12),
                                      ),
                                      child: Text(
                                        'Stock: ${product.stock}',
                                        style: TextStyle(
                                          fontSize: 12,
                                          color: Colors.green.shade700,
                                          fontWeight: FontWeight.w600,
                                        ),
                                      ),
                                    ),
                                    const SizedBox(height: 8),
                                    ElevatedButton(
                                      onPressed: () => _selectGift(product),
                                      style: ElevatedButton.styleFrom(
                                        backgroundColor: Colors.purple.shade600,
                                        foregroundColor: Colors.white,
                                        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                                        shape: RoundedRectangleBorder(
                                          borderRadius: BorderRadius.circular(8),
                                        ),
                                      ),
                                      child: const Text('Choisir', style: TextStyle(fontSize: 12)),
                                    ),
                                  ],
                                ),
                                onTap: () => _selectGift(product),
                              ),
                            );
                          },
                        ),
            ),
          ],
        ),
      ),
    );
  }
}