import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:em2rp/utils/colors.dart';
import 'package:em2rp/utils/permission_gate.dart';
import 'package:em2rp/views/widgets/nav/main_drawer.dart';
import 'package:em2rp/views/widgets/nav/custom_app_bar.dart';
import 'package:em2rp/providers/equipment_provider.dart';
import 'package:em2rp/models/equipment_model.dart';
import 'package:em2rp/views/equipment_form_page.dart';
import 'package:em2rp/views/equipment_detail_page.dart';
import 'package:em2rp/views/widgets/common/qr_code_dialog.dart';
import 'package:em2rp/views/widgets/common/qr_code_format_selector_dialog.dart';
import 'package:em2rp/mixins/selection_mode_mixin.dart';

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

  @override
  State<EquipmentManagementPage> createState() =>
      _EquipmentManagementPageState();
}


class _EquipmentManagementPageState extends State<EquipmentManagementPage>
    with SelectionModeMixin<EquipmentManagementPage> {
  final TextEditingController _searchController = TextEditingController();
  EquipmentCategory? _selectedCategory;

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

  @override
  Widget build(BuildContext context) {
    final isMobile = MediaQuery.of(context).size.width < 800;

    return PermissionGate(
      requiredPermissions: const ['view_equipment'],
      fallback: Scaffold(
        appBar: const CustomAppBar(title: 'Accès refusé'),
        drawer: const MainDrawer(currentPage: '/equipment_management'),
        body: const Center(
          child: Padding(
            padding: EdgeInsets.all(24.0),
            child: Text(
              'Vous n\'avez pas les permissions nécessaires pour accéder à la gestion du matériel.',
              textAlign: TextAlign.center,
              style: TextStyle(fontSize: 16),
            ),
          ),
        ),
      ),
      child: Scaffold(
        appBar: isSelectionMode
            ? AppBar(
                backgroundColor: AppColors.rouge,
                leading: IconButton(
                  icon: const Icon(Icons.close, color: Colors.white),
                  onPressed: toggleSelectionMode,
                ),
                title: Text(
                  '$selectedCount sélectionné(s)',
                  style: const TextStyle(color: Colors.white),
                ),
                actions: [
                  if (hasSelection) ...[
                    IconButton(
                      icon: const Icon(Icons.qr_code, color: Colors.white),
                      tooltip: 'Générer QR Codes',
                      onPressed: _generateQRCodesForSelected,
                    ),
                    IconButton(
                      icon: const Icon(Icons.delete, color: Colors.white),
                      tooltip: 'Supprimer',
                      onPressed: _deleteSelectedEquipment,
                    ),
                  ],
                ],
              )
            : CustomAppBar(
                title: 'Gestion du matériel',
                actions: [
                  IconButton(
                    icon: const Icon(Icons.checklist),
                    tooltip: 'Mode sélection',
                    onPressed: toggleSelectionMode,
                  ),
                ],
              ),
        drawer: const MainDrawer(currentPage: '/equipment_management'),
        body: isMobile ? _buildMobileLayout() : _buildDesktopLayout(),
        floatingActionButton: isSelectionMode ? null : _buildFAB(),
      ),
    );
  }

  Widget _buildFAB() {
    return PermissionGate(
      requiredPermissions: const ['manage_equipment'],
      child: FloatingActionButton.extended(
        onPressed: _createNewEquipment,
        backgroundColor: AppColors.rouge,
        icon: const Icon(Icons.add),
        label: const Text('Ajouter un équipement'),
      ),
    );
  }

  Widget _buildMobileLayout() {
    return Column(
      children: [
        // Barre de recherche et bouton boîtes
        Padding(
          padding: const EdgeInsets.all(16.0),
          child: Row(
            children: [
              Expanded(
                child: TextField(
                  controller: _searchController,
                  decoration: InputDecoration(
                    hintText: 'Rechercher par nom, modèle ou ID...',
                    prefixIcon: const Icon(Icons.search),
                    suffixIcon: _searchController.text.isNotEmpty
                        ? IconButton(
                            icon: const Icon(Icons.clear),
                            onPressed: () {
                              _searchController.clear();
                              context.read<EquipmentProvider>().setSearchQuery('');
                            },
                          )
                        : null,
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(8),
                    ),
                  ),
                  onChanged: (value) {
                    context.read<EquipmentProvider>().setSearchQuery(value);
                  },
                ),
              ),
              const SizedBox(width: 8),
              // Bouton Gérer les boîtes
              IconButton.filled(
                onPressed: () {
                  Navigator.pushNamed(context, '/container_management');
                },
                icon: const Icon(Icons.inventory_2),
                tooltip: 'Gérer les boîtes',
                style: IconButton.styleFrom(
                  backgroundColor: AppColors.rouge,
                  foregroundColor: Colors.white,
                ),
              ),
            ],
          ),
        ),
        // Menu horizontal de filtres par catégorie
        SizedBox(
          height: 60,
          child: ListView(
            scrollDirection: Axis.horizontal,
            padding: const EdgeInsets.symmetric(horizontal: 8),
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 4.0),
                child: ChoiceChip(
                  label: const Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Icon(Icons.all_inclusive, size: 16, color: Colors.white),
                      SizedBox(width: 8),
                      Text('Tout'),
                    ],
                  ),
                  selected: _selectedCategory == null,
                  onSelected: (selected) {
                    if (selected) {
                      setState(() => _selectedCategory = null);
                      context
                          .read<EquipmentProvider>()
                          .setSelectedCategory(null);
                    }
                  },
                  selectedColor: AppColors.rouge,
                  labelStyle: TextStyle(
                    color: _selectedCategory == null
                        ? Colors.white
                        : AppColors.rouge,
                    fontWeight: _selectedCategory == null
                        ? FontWeight.bold
                        : FontWeight.normal,
                  ),
                ),
              ),
              ..._buildCategoryChips(),
            ],
          ),
        ),
        const Divider(),
        // Liste des équipements
        Expanded(child: _buildEquipmentList()),
      ],
    );
  }

  Widget _buildDesktopLayout() {
    return Row(
      children: [
        // Sidebar gauche avec filtres
        Container(
          width: 280,
          decoration: BoxDecoration(
            color: Colors.grey[100],
            border: const Border(
              right: BorderSide(color: Colors.grey, width: 1),
            ),
          ),
          child: Column(
            children: [
              // Bouton Gérer les boîtes
              Padding(
                padding: const EdgeInsets.all(16.0),
                child: ElevatedButton.icon(
                  onPressed: () {
                    Navigator.pushNamed(context, '/container_management');
                  },
                  icon: const Icon(Icons.inventory_2, color: Colors.white),
                  label: const Text(
                    'Gérer les boîtes',
                    style: TextStyle(color: Colors.white),
                  ),
                  style: ElevatedButton.styleFrom(
                    backgroundColor: AppColors.rouge,
                    padding: const EdgeInsets.symmetric(
                      horizontal: 20,
                      vertical: 16,
                    ),
                    minimumSize: const Size(double.infinity, 50),
                  ),
                ),
              ),
              const Divider(),
              // En-tête filtres
              Padding(
                padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
                child: Row(
                  children: [
                    Icon(Icons.filter_list, color: AppColors.rouge, size: 20),
                    const SizedBox(width: 12),
                    Expanded(
                      child: Text(
                        'Filtres',
                        style:
                            Theme.of(context).textTheme.titleMedium?.copyWith(
                                  fontWeight: FontWeight.bold,
                                  color: AppColors.rouge,
                                ),
                      ),
                    ),
                  ],
                ),
              ),
              // Barre de recherche
              Padding(
                padding: const EdgeInsets.all(16.0),
                child: TextField(
                  controller: _searchController,
                  decoration: InputDecoration(
                    hintText: 'Rechercher...',
                    prefixIcon: const Icon(Icons.search, size: 20),
                    suffixIcon: _searchController.text.isNotEmpty
                        ? IconButton(
                            icon: const Icon(Icons.clear, size: 20),
                            onPressed: () {
                              _searchController.clear();
                              context
                                  .read<EquipmentProvider>()
                                  .setSearchQuery('');
                            },
                          )
                        : null,
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(8),
                    ),
                    isDense: true,
                    contentPadding:
                        const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                  ),
                  onChanged: (value) {
                    context.read<EquipmentProvider>().setSearchQuery(value);
                  },
                ),
              ),
              // Filtres par catégorie
              Padding(
                padding:
                    const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8),
                child: Align(
                  alignment: Alignment.centerLeft,
                  child: Text(
                    'Catégories',
                    style: Theme.of(context).textTheme.titleSmall?.copyWith(
                          fontWeight: FontWeight.bold,
                          color: Colors.grey[700],
                        ),
                  ),
                ),
              ),
              Expanded(
                child: ListView(
                  children: [
                    ListTile(
                      leading: Icon(
                        Icons.all_inclusive,
                        color: _selectedCategory == null
                            ? AppColors.rouge
                            : Colors.grey[600],
                      ),
                      title: Text(
                        'Tout',
                        style: TextStyle(
                          color: _selectedCategory == null
                              ? AppColors.rouge
                              : Colors.black87,
                          fontWeight: _selectedCategory == null
                              ? FontWeight.bold
                              : FontWeight.normal,
                        ),
                      ),
                      selected: _selectedCategory == null,
                      selectedTileColor: AppColors.rouge.withOpacity(0.1),
                      onTap: () {
                        setState(() => _selectedCategory = null);
                        context
                            .read<EquipmentProvider>()
                            .setSelectedCategory(null);
                      },
                    ),
                    ..._buildCategoryListTiles(),
                  ],
                ),
              ),
            ],
          ),
        ),
        // Contenu principal
        Expanded(child: _buildEquipmentList()),
      ],
    );
  }

  List<Widget> _buildCategoryChips() {
    return EquipmentCategory.values.map((category) {
      final isSelected = _selectedCategory == category;
      final color = isSelected ? Colors.white : AppColors.rouge;

      return Padding(
        padding: const EdgeInsets.symmetric(horizontal: 4.0),
        child: ChoiceChip(
          label: Row(
            mainAxisSize: MainAxisSize.min,
            children: [
              category.getIcon(
                size: 16,
                color: color,
              ),
              const SizedBox(width: 8),
              Text(category.label),
            ],
          ),
          selected: isSelected,
          onSelected: (selected) {
            if (selected) {
              setState(() => _selectedCategory = category);
              context.read<EquipmentProvider>().setSelectedCategory(category);
            }
          },
          selectedColor: AppColors.rouge,
          labelStyle: TextStyle(
            color: color,
            fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
          ),
        ),
      );
    }).toList();
  }

  List<Widget> _buildCategoryListTiles() {
    return EquipmentCategory.values.map((category) {
      final isSelected = _selectedCategory == category;
      final color = isSelected ? AppColors.rouge : Colors.grey[600]!;

      return ListTile(
        leading: category.getIcon(
          size: 24,
          color: color,
        ),
        title: Text(
          category.label,
          style: TextStyle(
            color: isSelected ? AppColors.rouge : Colors.black87,
            fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
          ),
        ),
        selected: isSelected,
        selectedTileColor: AppColors.rouge.withOpacity(0.1),
        onTap: () {
          setState(() => _selectedCategory = category);
          context.read<EquipmentProvider>().setSelectedCategory(category);
        },
      );
    }).toList();
  }

  Widget _buildEquipmentList() {
    return Consumer<EquipmentProvider>(
      builder: (context, provider, child) {
        return StreamBuilder<List<EquipmentModel>>(
          stream: provider.equipmentStream,
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.waiting) {
              return const Center(child: CircularProgressIndicator());
            }

            if (snapshot.hasError) {
              return Center(
                child: Text('Erreur: ${snapshot.error}'),
              );
            }

            if (!snapshot.hasData || snapshot.data!.isEmpty) {
              return Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Icon(Icons.inventory_2_outlined,
                        size: 64, color: Colors.grey[400]),
                    const SizedBox(height: 16),
                    Text(
                      'Aucun équipement trouvé',
                      style: TextStyle(fontSize: 18, color: Colors.grey[600]),
                    ),
                    const SizedBox(height: 8),
                    Text(
                      'Ajoutez votre premier équipement',
                      style: TextStyle(fontSize: 14, color: Colors.grey[500]),
                    ),
                  ],
                ),
              );
            }

            // Tri par nom
            final equipment = snapshot.data!;
            equipment.sort((a, b) => a.name.compareTo(b.name));

            return ListView.builder(
              padding: const EdgeInsets.all(16),
              itemCount: equipment.length,
              itemBuilder: (context, index) {
                return _buildEquipmentCard(equipment[index]);
              },
            );
          },
        );
      },
    );
  }

  Widget _buildEquipmentCard(EquipmentModel equipment) {
    final isSelected = isItemSelected(equipment.id);

    return Card(
      margin: const EdgeInsets.only(bottom: 12),
      color: isSelectionMode && isSelected
          ? AppColors.rouge.withOpacity(0.1)
          : null,
      child: ListTile(
        leading: isSelectionMode
            ? Checkbox(
                value: isSelected,
                onChanged: (value) => toggleItemSelection(equipment.id),
                activeColor: AppColors.rouge,
              )
            : CircleAvatar(
                backgroundColor:
                    equipment.status.color.withOpacity(0.2),
                child: equipment.category.getIcon(
                  size: 20,
                  color: Colors.black,
                ),
              ),
        title: Row(
          children: [
            Expanded(
              child: Text(
                equipment.id,
                style: const TextStyle(fontWeight: FontWeight.bold),
              ),
            ),
            // Afficher le statut uniquement si ce n'est pas un consommable ou câble
            if (equipment.category != EquipmentCategory.consumable &&
                equipment.category != EquipmentCategory.cable)
              _buildStatusBadge(equipment.status),
          ],
        ),
        subtitle: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const SizedBox(height: 4),
            Text(
              '${equipment.brand ?? ''} ${equipment.model ?? ''}'
                      .trim()
                      .isNotEmpty
                  ? '${equipment.brand ?? ''} ${equipment.model ?? ''}'.trim()
                  : 'Marque/Modèle non défini',
              style: TextStyle(color: Colors.grey[600], fontSize: 14),
            ),
            // Afficher la quantité disponible pour les consommables/câbles
            if (equipment.category == EquipmentCategory.consumable ||
                equipment.category == EquipmentCategory.cable) ...[
              const SizedBox(height: 4),
              _buildQuantityDisplay(equipment),
            ],
          ],
        ),
        trailing: isSelectionMode
            ? null
            : Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  // Bouton Restock (uniquement pour consommables/câbles avec permission)
                  if (equipment.category == EquipmentCategory.consumable ||
                      equipment.category == EquipmentCategory.cable)
                    PermissionGate(
                      requiredPermissions: const ['manage_equipment'],
                      child: IconButton(
                        icon: const Icon(Icons.add_shopping_cart,
                            color: AppColors.rouge),
                        tooltip: 'Restock',
                        onPressed: () => _showRestockDialog(equipment),
                      ),
                    ),
                  // Bouton QR Code
                  IconButton(
                    icon: const Icon(Icons.qr_code, color: AppColors.rouge),
                    tooltip: 'QR Code',
                    onPressed: () => showDialog(
                      context: context,
                      builder: (context) => QRCodeDialog.forEquipment(equipment),
                    ),
                  ),
                  // Bouton Modifier (permission required)
                  PermissionGate(
                    requiredPermissions: const ['manage_equipment'],
                    child: IconButton(
                      icon: const Icon(Icons.edit, color: AppColors.rouge),
                      tooltip: 'Modifier',
                      onPressed: () => _editEquipment(equipment),
                    ),
                  ),
                  // Bouton Supprimer (permission required)
                  PermissionGate(
                    requiredPermissions: const ['manage_equipment'],
                    child: IconButton(
                      icon: const Icon(Icons.delete, color: Colors.red),
                      tooltip: 'Supprimer',
                      onPressed: () => _deleteEquipment(equipment),
                    ),
                  ),
                ],
              ),
        onTap: isSelectionMode
            ? () => toggleItemSelection(equipment.id)
            : () => _viewEquipmentDetails(equipment),
      ),
    );
  }

  Widget _buildQuantityDisplay(EquipmentModel equipment) {
    final availableQty = equipment.availableQuantity ?? 0;
    final totalQty = equipment.totalQuantity ?? 0;
    final criticalThreshold = equipment.criticalThreshold ?? 0;
    final isCritical =
        criticalThreshold > 0 && availableQty <= criticalThreshold;

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: isCritical
            ? Colors.red.withOpacity(0.15)
            : Colors.grey.withOpacity(0.1),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(
          color: isCritical ? Colors.red : Colors.grey.shade400,
          width: isCritical ? 2 : 1,
        ),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(
            isCritical ? Icons.warning : Icons.inventory,
            size: 16,
            color: isCritical ? Colors.red : Colors.grey[700],
          ),
          const SizedBox(width: 6),
          Text(
            'Disponible: $availableQty / $totalQty',
            style: TextStyle(
              fontSize: 13,
              fontWeight: isCritical ? FontWeight.bold : FontWeight.normal,
              color: isCritical ? Colors.red : Colors.grey[700],
            ),
          ),
          if (isCritical) ...[
            const SizedBox(width: 6),
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
              decoration: BoxDecoration(
                color: Colors.red,
                borderRadius: BorderRadius.circular(10),
              ),
              child: const Text(
                'CRITIQUE',
                style: TextStyle(
                  fontSize: 10,
                  fontWeight: FontWeight.bold,
                  color: Colors.white,
                ),
              ),
            ),
          ],
        ],
      ),
    );
  }

  Widget _buildStatusBadge(EquipmentStatus status) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: status.color.withOpacity(0.2),
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: status.color),
      ),
      child: Text(
        status.label,
        style: TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.bold,
          color: status.color,
        ),
      ),
    );
  }

  // Actions
  void _createNewEquipment() {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => const EquipmentFormPage(),
      ),
    );
  }

  void _editEquipment(EquipmentModel equipment) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => EquipmentFormPage(equipment: equipment),
      ),
    );
  }

  void _deleteEquipment(EquipmentModel equipment) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Confirmer la suppression'),
        content: Text('Voulez-vous vraiment supprimer "${equipment.name}" ?'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Annuler'),
          ),
          TextButton(
            onPressed: () async {
              Navigator.pop(context);
              try {
                await context
                    .read<EquipmentProvider>()
                    .deleteEquipment(equipment.id);
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(
                        content: Text('Équipement supprimé avec succès')),
                  );
                }
              } catch (e) {
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(content: Text('Erreur: $e')),
                  );
                }
              }
            },
            style: TextButton.styleFrom(foregroundColor: Colors.red),
            child: const Text('Supprimer'),
          ),
        ],
      ),
    );
  }

  void _deleteSelectedEquipment() async {
    if (!hasSelection) return;

    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Confirmer la suppression'),
        content: Text(
          'Voulez-vous vraiment supprimer $selectedCount équipement(s) ?',
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Annuler'),
          ),
          TextButton(
            onPressed: () async {
              Navigator.pop(context);
              try {
                final provider = context.read<EquipmentProvider>();
                for (final id in selectedIds) {
                  await provider.deleteEquipment(id);
                }
                disableSelectionMode();
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(
                      content: Text(
                          '$selectedCount équipement(s) supprimé(s) avec succès'),
                      backgroundColor: Colors.green,
                    ),
                  );
                }
              } catch (e) {
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(content: Text('Erreur: $e')),
                  );
                }
              }
            },
            style: TextButton.styleFrom(foregroundColor: Colors.red),
            child: const Text('Supprimer'),
          ),
        ],
      ),
    );
  }

  void _generateQRCodesForSelected() async {
    if (!hasSelection) return;

    // Récupérer les équipements sélectionnés
    final provider = context.read<EquipmentProvider>();
    final List<EquipmentModel> selectedEquipment = [];

    // On doit récupérer les équipements depuis le stream
    await for (final equipmentList in provider.equipmentStream.take(1)) {
      for (final equipment in equipmentList) {
        if (isItemSelected(equipment.id)) {
          selectedEquipment.add(equipment);
        }
      }
      break;
    }

    if (selectedEquipment.isEmpty) return;

    if (selectedEquipment.length == 1) {
      // Un seul équipement : afficher le dialogue simple
      showDialog(
        context: context,
        builder: (context) => QRCodeDialog.forEquipment(selectedEquipment.first),
      );
    } else {
      // Plusieurs équipements : afficher le sélecteur de format
      showDialog(
        context: context,
        builder: (context) => QRCodeFormatSelectorDialog(
          equipmentList: selectedEquipment,
        ),
      );
    }
  }

  void _showRestockDialog(EquipmentModel equipment) {
    final TextEditingController quantityController = TextEditingController();
    bool addToTotal = false;

    showDialog(
      context: context,
      builder: (context) => StatefulBuilder(
        builder: (context, setState) {
          return AlertDialog(
            title: Row(
              children: [
                const Icon(Icons.add_shopping_cart, color: AppColors.rouge),
                const SizedBox(width: 12),
                Expanded(
                  child: Text('Restock - ${equipment.name}'),
                ),
              ],
            ),
            content: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Container(
                  padding: const EdgeInsets.all(12),
                  decoration: BoxDecoration(
                    color: Colors.grey[100],
                    borderRadius: BorderRadius.circular(8),
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        'Quantités actuelles',
                        style: TextStyle(
                          fontWeight: FontWeight.bold,
                          color: Colors.grey[700],
                        ),
                      ),
                      const SizedBox(height: 8),
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          const Text('Disponible:'),
                          Text(
                            '${equipment.availableQuantity ?? 0}',
                            style: const TextStyle(fontWeight: FontWeight.bold),
                          ),
                        ],
                      ),
                      const SizedBox(height: 4),
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          const Text('Total:'),
                          Text(
                            '${equipment.totalQuantity ?? 0}',
                            style: const TextStyle(fontWeight: FontWeight.bold),
                          ),
                        ],
                      ),
                    ],
                  ),
                ),
                const SizedBox(height: 20),
                TextField(
                  controller: quantityController,
                  decoration: const InputDecoration(
                    labelText: 'Quantité à ajouter/retirer',
                    border: OutlineInputBorder(),
                    prefixIcon: Icon(Icons.inventory),
                    hintText: 'Ex: 10 ou -5',
                    helperText:
                        'Nombre positif pour ajouter, négatif pour retirer',
                  ),
                  keyboardType:
                      const TextInputType.numberWithOptions(signed: true),
                  autofocus: true,
                ),
                const SizedBox(height: 16),
                CheckboxListTile(
                  title: const Text('Ajouter à la quantité totale'),
                  subtitle:
                      const Text('Mettre à jour aussi la quantité totale'),
                  value: addToTotal,
                  contentPadding: EdgeInsets.zero,
                  onChanged: (bool? value) {
                    setState(() {
                      addToTotal = value ?? false;
                    });
                  },
                ),
              ],
            ),
            actions: [
              TextButton(
                onPressed: () => Navigator.pop(context),
                child: const Text('Annuler'),
              ),
              ElevatedButton(
                onPressed: () async {
                  final quantityText = quantityController.text.trim();
                  if (quantityText.isEmpty) {
                    ScaffoldMessenger.of(context).showSnackBar(
                      const SnackBar(
                          content: Text('Veuillez entrer une quantité')),
                    );
                    return;
                  }

                  final quantity = int.tryParse(quantityText);
                  if (quantity == null) {
                    ScaffoldMessenger.of(context).showSnackBar(
                      const SnackBar(content: Text('Quantité invalide')),
                    );
                    return;
                  }

                  Navigator.pop(context);

                  try {
                    final currentAvailable = equipment.availableQuantity ?? 0;
                    final currentTotal = equipment.totalQuantity ?? 0;

                    final newAvailable = currentAvailable + quantity;
                    final newTotal =
                        addToTotal ? currentTotal + quantity : currentTotal;

                    if (newAvailable < 0) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(
                            content: Text(
                                'La quantité disponible ne peut pas être négative')),
                      );
                      return;
                    }

                    if (newTotal < 0) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(
                            content: Text(
                                'La quantité totale ne peut pas être négative')),
                      );
                      return;
                    }

                    final updatedData = {
                      'availableQuantity': newAvailable,
                      'totalQuantity': newTotal,
                      'updatedAt': DateTime.now().toIso8601String(),
                    };

                    await context.read<EquipmentProvider>().updateEquipment(
                          equipment.id,
                          updatedData,
                        );

                    if (mounted) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(
                          content: Text(
                            quantity > 0
                                ? 'Ajout de $quantity unité(s) effectué'
                                : 'Retrait de ${quantity.abs()} unité(s) effectué',
                          ),
                          backgroundColor: Colors.green,
                        ),
                      );
                    }
                  } catch (e) {
                    if (mounted) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(content: Text('Erreur: $e')),
                      );
                    }
                  }
                },
                style: ElevatedButton.styleFrom(
                  backgroundColor: AppColors.rouge,
                ),
                child: const Text('Valider',
                    style: TextStyle(color: Colors.white)),
              ),
            ],
          );
        },
      ),
    );
  }

  void _viewEquipmentDetails(EquipmentModel equipment) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => EquipmentDetailPage(equipment: equipment),
      ),
    );
  }
}