// services/pdf_service.dart
import 'dart:io';
import 'dart:typed_data';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:printing/printing.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share_plus/share_plus.dart';
import '../models/command_detail.dart';

class PdfService {
  static Future<Uint8List> generateFacturePdf({
    required CommandeDetail commande,
    required String paymentMethod,
  }) async {
    final pdf = pw.Document();

    // Informations du restaurant
    final restaurantInfo = {
      'nom': 'RESTAURANT',
      'adresse': 'Moramanga, Antananarivo',
      'contact': '+261 34 12 34 56',
    };

    // Générer numéro de facture
    final factureNumber =
        'F${DateTime.now().millisecondsSinceEpoch.toString().substring(7)}';
    final dateTime = DateTime.now();

    pdf.addPage(
      pw.Page(
        pageFormat: PdfPageFormat.a4,
        margin: const pw.EdgeInsets.all(32),
        build: (pw.Context context) {
          return pw.Column(
            crossAxisAlignment: pw.CrossAxisAlignment.start,
            children: [
              // En-tête Restaurant
              pw.Center(
                child: pw.Column(
                  children: [
                    pw.Text(
                      restaurantInfo['nom']!,
                      style: pw.TextStyle(
                        fontSize: 24,
                        fontWeight: pw.FontWeight.bold,
                      ),
                    ),
                    pw.SizedBox(height: 8),
                    pw.Text(
                      'Adresse: ${restaurantInfo['adresse']}',
                      style: const pw.TextStyle(fontSize: 12),
                    ),
                    pw.Text(
                      'Contact: ${restaurantInfo['contact']}',
                      style: const pw.TextStyle(fontSize: 12),
                    ),
                  ],
                ),
              ),

              pw.SizedBox(height: 30),

              // Informations facture
              pw.Center(
                child: pw.Column(
                  children: [
                    pw.Text(
                      'Facture n° $factureNumber',
                      style: pw.TextStyle(
                        fontSize: 14,
                        fontWeight: pw.FontWeight.bold,
                      ),
                    ),
                    pw.SizedBox(height: 4),
                    pw.Text(
                      'Date: ${_formatDateTime(dateTime)}',
                      style: const pw.TextStyle(fontSize: 12),
                    ),
                    pw.SizedBox(height: 4),
                    pw.Text(
                      'Table: ${commande.numeroCommande}',
                      style: const pw.TextStyle(fontSize: 12),
                    ),
                    pw.SizedBox(height: 4),
                    pw.Text(
                      'Paiement: ${_getPaymentMethodText(paymentMethod)}',
                      style: const pw.TextStyle(fontSize: 12),
                    ),
                  ],
                ),
              ),

              pw.SizedBox(height: 30),

              // Tableau des articles
              pw.Table(
                border: pw.TableBorder.all(color: PdfColors.grey300),
                columnWidths: {
                  0: const pw.FlexColumnWidth(3),
                  1: const pw.FlexColumnWidth(1),
                  2: const pw.FlexColumnWidth(1),
                },
                children: [
                  // En-tête du tableau
                  pw.TableRow(
                    decoration: const pw.BoxDecoration(
                      color: PdfColors.grey100,
                    ),
                    children: [
                      pw.Padding(
                        padding: const pw.EdgeInsets.all(8),
                        child: pw.Text(
                          'Qté Désignation',
                          style: pw.TextStyle(fontWeight: pw.FontWeight.bold),
                        ),
                      ),
                      pw.Padding(
                        padding: const pw.EdgeInsets.all(8),
                        child: pw.Text(
                          'Prix',
                          style: pw.TextStyle(fontWeight: pw.FontWeight.bold),
                          textAlign: pw.TextAlign.right,
                        ),
                      ),
                    ],
                  ),
                  // Lignes des articles
                  ...commande.items
                      .map(
                        (item) => pw.TableRow(
                          children: [
                            pw.Padding(
                              padding: const pw.EdgeInsets.all(8),
                              child: pw.Text(
                                '${item.quantite} TESTNOMCOMMANDE',
                              ),
                            ),
                            pw.Padding(
                              padding: const pw.EdgeInsets.all(8),
                              child: pw.Text(
                                '${item.prixUnitaire.toStringAsFixed(2)} €',
                                textAlign: pw.TextAlign.right,
                              ),
                            ),
                          ],
                        ),
                      )
                      .toList(),
                ],
              ),

              pw.SizedBox(height: 20),

              // Total
              pw.Container(
                alignment: pw.Alignment.centerRight,
                child: pw.Container(
                  padding: const pw.EdgeInsets.all(12),
                  decoration: pw.BoxDecoration(
                    border: pw.Border.all(color: PdfColors.grey400),
                    color: PdfColors.grey50,
                  ),
                  child: pw.Text(
                    'Total: ${commande.totalTtc.toStringAsFixed(2)} €',
                    style: pw.TextStyle(
                      fontSize: 16,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                ),
              ),

              pw.Spacer(),

              // Message de remerciement
              pw.Center(
                child: pw.Text(
                  'Merci et à bientôt !',
                  style: pw.TextStyle(
                    fontSize: 12,
                    fontStyle: pw.FontStyle.italic,
                  ),
                ),
              ),
            ],
          );
        },
      ),
    );

    return pdf.save();
  }

  static String _formatDateTime(DateTime dateTime) {
    return '${dateTime.day.toString().padLeft(2, '0')}/${dateTime.month.toString().padLeft(2, '0')}/${dateTime.year} ${dateTime.hour.toString().padLeft(2, '0')}:${dateTime.minute.toString().padLeft(2, '0')}';
  }

  static String _getPaymentMethodText(String method) {
    switch (method) {
      case 'mvola':
        return 'MVola';
      case 'carte':
        return 'CB';
      case 'especes':
        return 'Espèces';
      default:
        return 'CB';
    }
  }

  // Imprimer directement
  static Future<bool> printFacture({
    required CommandeDetail commande,
    required String paymentMethod,
  }) async {
    try {
      final pdfData = await generateFacturePdf(
        commande: commande,
        paymentMethod: paymentMethod,
      );

      await Printing.layoutPdf(
        onLayout: (PdfPageFormat format) async => pdfData,
        name:
            'Facture_${commande.numeroCommande}_${DateTime.now().millisecondsSinceEpoch}',
      );

      return true;
    } catch (e) {
      print('Erreur impression: $e');
      return false;
    }
  }

  // Sauvegarder et partager le PDF
  static Future<bool> saveAndShareFacture({
    required CommandeDetail commande,
    required String paymentMethod,
  }) async {
    try {
      final pdfData = await generateFacturePdf(
        commande: commande,
        paymentMethod: paymentMethod,
      );

      final directory = await getApplicationDocumentsDirectory();
      final fileName =
          'Facture_${commande.numeroCommande}_${DateTime.now().millisecondsSinceEpoch}.pdf';
      final file = File('${directory.path}/$fileName');

      await file.writeAsBytes(pdfData);

      await Share.shareXFiles(
        [XFile(file.path)],
        subject: 'Facture ${commande.numeroCommande}',
        text: 'Facture de votre commande au restaurant',
      );

      return true;
    } catch (e) {
      print('Erreur sauvegarde/partage: $e');
      return false;
    }
  }
}