// pages/facture_screen.dart
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import '../models/command_detail.dart';
import '../services/pdf_service.dart';

class FactureScreen extends StatefulWidget {
  final CommandeDetail commande;
  final String paymentMethod;

  const FactureScreen({
    Key? key,
    required this.commande,
    required this.paymentMethod,
  }) : super(key: key);

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

class _FactureScreenState extends State<FactureScreen> {
  String get paymentMethodText {
    switch (widget.paymentMethod) {
      case 'mvola':
        return 'MVola';
      case 'carte':
        return 'CB';
      case 'especes':
        return 'Espèces';
      default:
        return 'CB';
    }
  }

  String get factureNumber {
    return 'F${DateTime.now().millisecondsSinceEpoch.toString().substring(7)}';
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[100],
      appBar: AppBar(
        backgroundColor: Colors.white,
        elevation: 0,
        leading: IconButton(
          icon: const Icon(Icons.arrow_back, color: Colors.black),
          onPressed: () => Navigator.of(context).pop(),
        ),
        title: const Text(
          'Retour',
          style: TextStyle(
            color: Colors.black,
            fontSize: 16,
            fontWeight: FontWeight.w500,
          ),
        ),
        actions: [
          Container(
            margin: const EdgeInsets.only(right: 16, top: 8, bottom: 8),
            child: ElevatedButton.icon(
              onPressed: _printReceipt,
              icon: const Icon(Icons.print, size: 18),
              label: const Text('Imprimer'),
              style: ElevatedButton.styleFrom(
                backgroundColor: const Color(0xFF28A745),
                foregroundColor: Colors.white,
                elevation: 0,
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(6),
                ),
                padding: const EdgeInsets.symmetric(
                  horizontal: 12,
                  vertical: 8,
                ),
              ),
            ),
          ),
        ],
      ),
      body: Center(
        child: Container(
          width: 400,
          margin: const EdgeInsets.all(20),
          child: Card(
            elevation: 2,
            color: Colors.white,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(8),
            ),
            child: Padding(
              padding: const EdgeInsets.all(40),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  _buildHeader(),
                  const SizedBox(height: 30),
                  _buildFactureInfo(),
                  const SizedBox(height: 30),
                  _buildItemsList(),
                  const SizedBox(height: 20),
                  _buildTotal(),
                  const SizedBox(height: 30),
                  _buildFooter(),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget _buildHeader() {
    return Column(
      children: [
        const Text(
          'RESTAURANT',
          style: TextStyle(
            fontSize: 20,
            fontWeight: FontWeight.bold,
            letterSpacing: 1.2,
          ),
        ),
        const SizedBox(height: 12),
        const Text(
          'Adresse: 123 Rue de la Paix',
          style: TextStyle(fontSize: 12, color: Colors.black87),
        ),
        const Text(
          'Contact: +33 1 23 45 67 89',
          style: TextStyle(fontSize: 12, color: Colors.black87),
        ),
      ],
    );
  }

  Widget _buildFactureInfo() {
    final now = DateTime.now();
    final dateStr =
        '${now.day.toString().padLeft(2, '0')}/${now.month.toString().padLeft(2, '0')}/${now.year}';
    final timeStr =
        '${now.hour.toString().padLeft(2, '0')}:${now.minute.toString().padLeft(2, '0')}';

    return Column(
      children: [
        Text(
          'Facture n° $factureNumber',
          style: const TextStyle(fontSize: 14, fontWeight: FontWeight.w600),
        ),
        const SizedBox(height: 4),
        Text(
          'Date: $dateStr $timeStr',
          style: const TextStyle(fontSize: 12, color: Colors.black87),
        ),
        const SizedBox(height: 4),
        Text(
          'Table: ${widget.commande.tableId}',
          style: const TextStyle(fontSize: 12, color: Colors.black87),
        ),
        const SizedBox(height: 4),
        Text(
          'Paiement: $paymentMethodText',
          style: const TextStyle(fontSize: 12, color: Colors.black87),
        ),
      ],
    );
  }

  Widget _buildItemsList() {
    return Column(
      children: [
        const Padding(
          padding: EdgeInsets.only(bottom: 10),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                'Qté Désignation',
                style: TextStyle(fontSize: 12, fontWeight: FontWeight.w600),
              ),
              Text(
                'Prix',
                style: TextStyle(fontSize: 12, fontWeight: FontWeight.w600),
              ),
            ],
          ),
        ),
        const Divider(height: 1, color: Colors.black26),
        const SizedBox(height: 10),
        ...widget.commande.items
            .map(
              (item) => Padding(
                padding: const EdgeInsets.only(bottom: 6),
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Expanded(
                      child: Text(
                        '${item.quantite} ${item.menuNom}',
                        style: const TextStyle(
                          fontSize: 12,
                          color: Colors.black87,
                        ),
                      ),
                    ),
                    Text(
                      '${(item.prixUnitaire * item.quantite).toStringAsFixed(2)} MGA',
                      style: const TextStyle(
                        fontSize: 12,
                        color: Colors.black87,
                      ),
                    ),
                  ],
                ),
              ),
            )
            .toList(),
      ],
    );
  }

  Widget _buildTotal() {
    return Column(
      children: [
        const Divider(height: 1, color: Colors.black26),
        const SizedBox(height: 12),
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            const Text(
              'Total:',
              style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
            ),
            Text(
              '${widget.commande.totalTtc.toStringAsFixed(2)} €',
              style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
            ),
          ],
        ),
      ],
    );
  }

  Widget _buildFooter() {
    return const Text(
      'Merci et à bientôt !',
      style: TextStyle(
        fontSize: 12,
        fontStyle: FontStyle.italic,
        color: Colors.black54,
      ),
    );
  }

  void _printReceipt() async {
    try {
      HapticFeedback.lightImpact();

      final success = await PdfService.printFacture(
        commande: widget.commande,
        paymentMethod: widget.paymentMethod,
      );

      if (success) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: const Row(
              children: [
                Icon(Icons.check_circle, color: Colors.white),
                SizedBox(width: 8),
                Text('Facture envoyée à l\'impression'),
              ],
            ),
            backgroundColor: const Color(0xFF28A745),
            duration: const Duration(seconds: 2),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(6),
            ),
            margin: const EdgeInsets.all(16),
            behavior: SnackBarBehavior.floating,
          ),
        );

        Future.delayed(const Duration(seconds: 2), () {
          if (mounted) {
            Navigator.of(context).popUntil((route) => route.isFirst);
          }
        });
      }
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('Erreur impression: $e'),
          backgroundColor: Colors.red,
        ),
      );
    } finally {
      if (mounted) {
        Navigator.of(context).pop();
      }
    }
  }
}