// pages/caisse_screen.dart
import 'package:flutter/material.dart';
import 'package:itrimobe/pages/facture_screen.dart';
import '../models/command_detail.dart';
import '../models/payment_method.dart';
import '../services/restaurant_api_service.dart';
import 'package:intl/intl.dart';

import 'information.dart';

class CaisseScreen extends StatefulWidget {
  final String commandeId;
  final String tableName;

  const CaisseScreen({
    super.key,
    required this.commandeId,
    required this.tableName,
  });

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

class _CaisseScreenState extends State<CaisseScreen> {
  CommandeDetail? commande;
  PrintTemplate? template;
  PaymentMethod? selectedPaymentMethod;
  bool isLoading = true;
  bool isProcessingPayment = false;

  final List<PaymentMethod> paymentMethods = [
    const PaymentMethod(
      id: 'mvola',
      name: 'MVola',
      description: 'Paiement mobile MVola',
      icon: Icons.phone,
      color: Color(0xFF28A745),
    ),
    const PaymentMethod(
      id: 'orange_money',
      name: 'Orange Money',
      description: 'Paiement mobile Orange Money',
      icon: Icons.phone,
      color: Color(0xFFFF9500),
    ),
    const PaymentMethod(
      id: 'carte',
      name: 'Carte Bancaire',
      description: 'Paiement par carte',
      icon: Icons.credit_card,
      color: Color(0xFF4285F4),
    ),
    const PaymentMethod(
      id: 'especes',
      name: 'Espèces',
      description: 'Paiement en liquide',
      icon: Icons.attach_money,
      color: Color(0xFFFFEB3B),
    ),
  ];

  @override
  void initState() {
    super.initState();
    _loadCommandeDetails();
  }

  Future<void> _loadCommandeDetails() async {
    setState(() => isLoading = true);

    try {
      final result = await RestaurantApiService.getCommandeDetails(
        widget.commandeId,
      );
      final loadedTemplate = await RestaurantApiService.getPrintTemplate();
      setState(() {
        commande = result;
        template = loadedTemplate;
        isLoading = false;
      });
    } catch (e) {
      setState(() => isLoading = false);
      _showErrorDialog(
        'Erreur lors du chargement des détails de la commande: $e',
      );
    }
  }

  // Dans caisse_screen.dart, modifiez la méthode _processPayment
 Future<void> _processPayment() async {
  if (selectedPaymentMethod == null || commande == null) return;

  setState(() => isProcessingPayment = true);

  try {
    final success = await RestaurantApiService.processPayment(
      commandeId: widget.commandeId,
      paymentMethodId: selectedPaymentMethod!.id,
      amount: commande!.totalHt,
    );

    if (success) {
      final updateSuccess = await RestaurantApiService.updateCommandeStatus(
        commandeId: widget.commandeId,
        newStatus: 'payee',
      );

      if (!updateSuccess) {
        _showErrorDialog("Paiement effectué, mais échec lors de la mise à jour du statut.");
        return;
      }

      // 🔄 Redirige vers la facture et attend le retour
      final result = await Navigator.of(context).push(
        MaterialPageRoute(
          builder: (context) => FactureScreen(
            commande: commande!,
            template: template!,
            paymentMethod: selectedPaymentMethod!.id, 
          ),
        ),
      );
      
      // Quand on revient de la facture, on retourne à la page précédente avec succès
      if (mounted) {
        Navigator.of(context).pop(true);
      }
    } else {
      _showErrorDialog('Le paiement a échoué. Veuillez réessayer.');
    }
  } catch (e) {
    _showErrorDialog('Erreur lors du traitement du paiement: $e');
  } finally {
    if (mounted) {
      setState(() => isProcessingPayment = false);
    }
  }
}




  void _showErrorDialog(String message) {
    showDialog(
      context: context,
      builder:
          (context) => AlertDialog(
            title: const Text('Erreur'),
            content: Text(message),
            actions: [
              TextButton(
                onPressed: () => Navigator.of(context).pop(),
                child: const Text('OK'),
              ),
            ],
          ),
    );
  }

  void _showSuccessDialog() {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder:
          (context) => AlertDialog(
            title: const Row(
              children: [
                Icon(Icons.check_circle, color: Color(0xFF28A745), size: 28),
                SizedBox(width: 12),
                Text('Paiement réussi'),
              ],
            ),
            content: Text(
              'Le paiement de ${NumberFormat("#,##0.00", "fr_FR").format(commande!.totalHt)} MGA a été traité avec succès via ${selectedPaymentMethod!.name}.',
            ),
            actions: [
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop(); // Fermer le dialog
                  Navigator.of(
                    context,
                  ).pop(true); // Retourner à la page précédente avec succès
                },
                child: const Text('Fermer'),
              ),
            ],
          ),
    );
  }



  Widget _buildCommandeHeader() {
      print(widget.tableName);
    if (commande == null) return const SizedBox.shrink();

    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: Colors.grey[50],
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: Colors.grey[200]!),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                'Commande #${commande!.numeroCommande}',
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.bold,
                  color: Colors.black87,
                ),
              ),
              Container(
                padding: const EdgeInsets.symmetric(
                  horizontal: 12,
                  vertical: 6,
                ),
                decoration: BoxDecoration(
                  color: Colors.blue[50],
                  borderRadius: BorderRadius.circular(20),
                  border: Border.all(color: Colors.blue[200]!),
                ),
                child: Text(
                  '${widget.tableName}',
                  style: TextStyle(
                    color: Colors.blue[700],
                    fontSize: 12,
                    fontWeight: FontWeight.w600,
                  ),
                ),
              ),
            ],
          ),

          const SizedBox(height: 16),

          _buildCommandeItems(),

          const SizedBox(height: 16),

          const Divider(),

          const SizedBox(height: 8),

          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              const Text(
                'Total:',
                style: TextStyle(
                  fontSize: 16,
                  fontWeight: FontWeight.bold,
                  color: Colors.black87,
                ),
              ),
              Text(
                '${NumberFormat("#,##0.00", "fr_FR").format(commande!.totalHt)} MGA',
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.bold,
                  color: Color(0xFF28A745),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildCommandeItems() {
    if (commande?.items.isEmpty ?? true) {
      return const Text('Aucun article');
    }

    return Column(
      children:
          commande!.items.map((item) {
            return Padding(
              padding: const EdgeInsets.symmetric(vertical: 4),
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          '${item.quantite}× ${item.menuNom}',
                          style: const TextStyle(
                            fontSize: 14,
                            fontWeight: FontWeight.w500,
                          ),
                        ),
                        if (item.menuDescription != null &&
                            item.menuDescription!.isNotEmpty)
                          Padding(
                            padding: const EdgeInsets.only(top: 2),
                            child: Text(
                              item.menuDescription!,
                              style: TextStyle(
                                fontSize: 12,
                                color: Colors.grey[600],
                              ),
                              maxLines: 2,
                              overflow: TextOverflow.ellipsis,
                            ),
                          ),
                        if (item.hasComments)
                          Padding(
                            padding: const EdgeInsets.only(top: 2),
                            child: Text(
                              'Note: ${item.commentaires}',
                              style: TextStyle(
                                fontSize: 12,
                                color: Colors.orange[700],
                                fontStyle: FontStyle.italic,
                              ),
                            ),
                          ),
                      ],
                    ),
                  ),
                  const SizedBox(width: 12),
                  Text(
                    '${NumberFormat("#,##0.00", "fr_FR").format(item.totalItem)} MGA',
                    style: const TextStyle(
                      fontSize: 14,
                      fontWeight: FontWeight.w600,
                    ),
                  ),
                ],
              ),
            );
          }).toList(),
    );
  }


Widget _buildPaymentSection() {
  double montantDonne = 0.0;
  double rendu = 0.0;
  TextEditingController montantController = TextEditingController();

  return StatefulBuilder(
    builder: (context, setState) {
      return Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 🔵 Colonne gauche : méthodes de paiement
         Expanded(
          flex: 1,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text(
                'Méthode de paiement',
                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 16),
              ...paymentMethods.map((method) {
                final isSelected = selectedPaymentMethod?.id == method.id;
                return _buildPaymentMethodCard(method, isSelected); // 🔹 plus besoin de StatefulBuilder
              }).toList(),
            ],
          ),
        ),


          const SizedBox(width: 90),

          // 🟢 Colonne droite : saisie montant et rendu
          Expanded(
            flex: 1,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  'Montant à payer :',
                  style: const TextStyle(
                      fontWeight: FontWeight.bold, fontSize: 16),
                ),
                const SizedBox(height: 8),
                Text(
                  '${NumberFormat("#,##0.00", "fr_FR").format(commande?.totalHt ?? 0)} MGA',
                  style: const TextStyle(
                      fontWeight: FontWeight.bold,
                      fontSize: 20,
                      color: Color(0xFF28A745)),
                ),
                const SizedBox(height: 24),
                TextField(
                  controller: montantController,
                  keyboardType: TextInputType.number,
                  decoration: const InputDecoration(
                    labelText: "Montant donné par le client",
                    border: OutlineInputBorder(),
                  ),
                  onChanged: (value) {
                    setState(() {
                      montantDonne = double.tryParse(value) ?? 0.0;
                      rendu = montantDonne - (commande?.totalHt ?? 0.0);
                    });
                  },
                ),
                const SizedBox(height: 24),
                Text(
                  'Rendu :',
                  style: const TextStyle(
                    fontWeight: FontWeight.bold,
                    fontSize: 16,
                  ),
                ),
                const SizedBox(height: 8),
                Container(
                  padding: const EdgeInsets.symmetric(
                      horizontal: 16, vertical: 12),
                  decoration: BoxDecoration(
                    color: rendu >= 0 ? Colors.green[50] : Colors.red[50],
                    borderRadius: BorderRadius.circular(12),
                  ),
                  child: Text(
                    '${rendu >= 0 ? NumberFormat("#,##0.00", "fr_FR").format(rendu) : "0"} MGA',
                    style: TextStyle(
                      fontWeight: FontWeight.bold,
                      fontSize: 24, // rendu plus grand
                      color: rendu >= 0 ? Colors.green : Colors.red,
                    ),
                  ),
                ),
                if (rendu < 0)
                  const Padding(
                    padding: EdgeInsets.only(top: 8.0),
                    child: Text(
                      "Montant insuffisant",
                      style: TextStyle(color: Colors.red),
                    ),
                  ),
              ],
            ),
          ),
        ],
      );
    },
  );
}


// Modification de _buildPaymentMethodCard pour accepter setState de la StatefulBuilder
Widget _buildPaymentMethodCard(PaymentMethod method, bool isSelected) {
  final amount = commande?.totalHt ?? 0.0;

  return Container(
    margin: const EdgeInsets.only(bottom: 12),
    child: Material(
      color: Colors.transparent,
      child: InkWell(
        onTap: () {
          setState(() {
            selectedPaymentMethod = method; // 🔹 setState global
          });
        },
        borderRadius: BorderRadius.circular(12),
        child: AnimatedContainer(
          duration: const Duration(milliseconds: 250),
          curve: Curves.easeInOut,
          padding: const EdgeInsets.all(20),
          decoration: BoxDecoration(
            color: isSelected ? Colors.white : method.color,
            borderRadius: BorderRadius.circular(12),
            border: Border.all(
              color: isSelected ? method.color : Colors.transparent,
              width: 2,
            ),
            boxShadow: [
              if (isSelected)
                BoxShadow(
                  color: method.color.withOpacity(0.4),
                  blurRadius: 8,
                  offset: const Offset(0, 3),
                ),
            ],
          ),
          child: Row(
            children: [
              Container(
                padding: const EdgeInsets.all(12),
                decoration: BoxDecoration(
                  color: isSelected
                      ? method.color.withOpacity(0.1)
                      : Colors.white.withOpacity(0.2),
                  borderRadius: BorderRadius.circular(8),
                ),
                child: Icon(
                  method.icon,
                  color: isSelected ? method.color : Colors.white,
                  size: 24,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      method.name,
                      style: TextStyle(
                        color: isSelected ? Colors.black87 : Colors.white,
                        fontSize: 16,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                    const SizedBox(height: 4),
                    Text(
                      method.description,
                      style: TextStyle(
                        color: isSelected
                            ? Colors.black54
                            : Colors.white.withOpacity(0.9),
                        fontSize: 13,
                      ),
                    ),
                  ],
                ),
              ),
              Icon(
                isSelected ? Icons.check_circle : Icons.radio_button_unchecked,
                color: isSelected ? method.color : Colors.white,
                size: 22,
              ),
              const SizedBox(width: 8),
              Text(
                '${NumberFormat("#,##0.00", "fr_FR").format(amount)} MGA',
                style: TextStyle(
                    color: isSelected ? Colors.black87 : Colors.white,
                    fontSize: 16,
                    fontWeight: FontWeight.bold),
              ),
            ],
          ),
        ),
      ),
    ),
  );
}





  Widget _buildPaymentButton() {
    final canPay = selectedPaymentMethod != null && !isProcessingPayment;

    return Container(
      width: double.infinity,
      margin: const EdgeInsets.only(top: 20),
      child: ElevatedButton(
        onPressed: canPay ? _processPayment : null,
        style: ElevatedButton.styleFrom(
          backgroundColor: const Color(0xFF28A745),
          foregroundColor: Colors.white,
          padding: const EdgeInsets.symmetric(vertical: 16),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(12),
          ),
          elevation: 2,
        ),
        child:
            isProcessingPayment
                ? const Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    SizedBox(
                      width: 20,
                      height: 20,
                      child: CircularProgressIndicator(
                        strokeWidth: 2,
                        valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
                      ),
                    ),
                    SizedBox(width: 12),
                    Text(
                      'Traitement en cours...',
                      style: TextStyle(
                        fontSize: 16,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                  ],
                )
                : Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    const Icon(Icons.payment, size: 20),
                    const SizedBox(width: 8),
                    Text(
                      selectedPaymentMethod != null
                          ? 'Payer ${NumberFormat("#,##0.00", "fr_FR").format(commande?.totalHt)} MGA'
                          : 'Sélectionnez une méthode de paiement',
                      style: const TextStyle(
                        fontSize: 16,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                  ],
                ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        backgroundColor: Colors.white,
        elevation: 0,
        leading: IconButton(
          icon: const Icon(Icons.arrow_back, color: Colors.black87),
          onPressed: () => Navigator.of(context).pop(),
        ),
        title: const Text(
          'Caisse',
          style: TextStyle(
            color: Colors.black87,
            fontSize: 20,
            fontWeight: FontWeight.bold,
          ),
        ),
        centerTitle: true,
      ),

      body:
          isLoading
              ? const Center(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    CircularProgressIndicator(
                      valueColor: AlwaysStoppedAnimation<Color>(
                        Color(0xFF28A745),
                      ),
                    ),
                    SizedBox(height: 16),
                    Text(
                      'Chargement des détails...',
                      style: TextStyle(fontSize: 14, color: Colors.grey),
                    ),
                  ],
                ),
              )
              : commande == null
              ? Center(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    const Icon(
                      Icons.error_outline,
                      size: 64,
                      color: Colors.red,
                    ),
                    const SizedBox(height: 16),
                    const Text(
                      'Impossible de charger la commande',
                      style: TextStyle(
                        fontSize: 16,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                    const SizedBox(height: 8),
                    Text(
                      'Commande #${widget.commandeId}',
                      style: TextStyle(fontSize: 14, color: Colors.grey[600]),
                    ),
                    const SizedBox(height: 20),
                    ElevatedButton(
                      onPressed: _loadCommandeDetails,
                      child: const Text('Réessayer'),
                    ),
                  ],
                ),
              )
              : SingleChildScrollView(
  padding: const EdgeInsets.all(20),
  child: Column(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: [
      _buildCommandeHeader(),

      const SizedBox(height: 32),

      _buildPaymentSection(), // <-- ici on met le widget avec 2 colonnes

      _buildPaymentButton(),

      const SizedBox(height: 20),
    ],
  ),
),

    );
  }
}