import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/foundation.dart' show kIsWeb, debugPrint;
import 'package:intl/intl.dart';
import 'package:path_provider/path_provider.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:open_file/open_file.dart';
import 'package:share_plus/share_plus.dart';
import 'package:cross_file/cross_file.dart';
import 'package:tugas_akhir_supabase/data/models/diagnosis_result_model.dart'; // Pastikan path ini benar
import 'package:tugas_akhir_supabase/utils/web_pdf_helper.dart' if (dart.library.io) 'package:tugas_akhir_supabase/utils/mobile_pdf_helper.dart';

// Conditionally import dart:html for web
// This is needed because dart:html is not available on mobile platforms
// The following line will be ignored when compiling for mobile
// @dart=2.9

class HarvestPdfGenerator {
  final currency = NumberFormat.currency(locale: 'id_ID', symbol: 'Rp ');
  /// Membuat PDF dari data analisis panen
  Future<File> generatePdf({
    required String title,
    required Map<String, dynamic> harvestData,
    Map<String, dynamic>? scheduleData,
    List<Map<String, dynamic>>? dailyLogs,
    Uint8List? chartImageBytes,
  }) async {
    // Buat dokumen PDF
    final pdf = pw.Document();
    
    // Tanggal laporan
    final now = DateTime.now();
    final formattedDate = DateFormat('dd MMMM yyyy, HH:mm').format(now);
    final fileName = 'laporan_panen_${DateFormat('yyyyMMdd_HHmmss').format(now)}.pdf';
    
    // Ekstrak data dengan penanganan tipe data yang aman
    final cropName = _safeToString(scheduleData?['crop_name'] ?? harvestData['crop_name'] ?? 'Tidak diketahui');
    final productivity = _safeToDouble(harvestData['productivity']);
    final totalCost = _safeToDouble(harvestData['cost']);
    final income = _safeToDouble(harvestData['income']);
    final profit = _safeToDouble(harvestData['profit']);
    final profitMargin = _safeToDouble(harvestData['profit_margin']);
    final status = _safeToString(harvestData['status'] ?? 'Tidak diketahui');
    
    // Tambahkan halaman ke PDF
    pdf.addPage(
      pw.MultiPage(
        pageFormat: PdfPageFormat.a4,
        header: (pw.Context context) {
          return pw.Center(
            child: pw.Text(
              'LAPORAN ANALISIS PANEN',
              style: pw.TextStyle(
                fontSize: 18,
                fontWeight: pw.FontWeight.bold,
              ),
            ),
          );
        },
        footer: (pw.Context context) {
          return pw.Center(
            child: pw.Text(
              'Halaman ${context.pageNumber} dari ${context.pagesCount}',
              style: const pw.TextStyle(
                fontSize: 10,
              ),
            ),
          );
        },
        build: (pw.Context context) {
          return [
            pw.Center(
              child: pw.Text(
                formattedDate,
                style: const pw.TextStyle(
                  fontSize: 12,
                ),
              ),
            ),
            pw.SizedBox(height: 20),
            
            // Informasi Tanaman
            pw.Container(
              padding: const pw.EdgeInsets.all(10),
              decoration: pw.BoxDecoration(
                border: pw.Border.all(),
                borderRadius: pw.BorderRadius.circular(5),
              ),
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'INFORMASI TANAMAN',
                    style: pw.TextStyle(
                      fontSize: 14,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.Divider(),
                  _buildInfoRowForHarvest('Jenis Tanaman', cropName),
                  if (scheduleData != null) ...[
                    _buildInfoRowForHarvest('Lahan', _safeToString(scheduleData['field_name'] ?? '-')),
                    _buildInfoRowForHarvest('Plot', _safeToString(scheduleData['plot'] ?? '-')),
                    _buildInfoRowForHarvest(
                      'Periode Tanam', 
                      '${_formatDate(_safeToString(scheduleData['start_date']))} - ${_formatDate(_safeToString(scheduleData['end_date']))}'
                    ),
                    _buildInfoRowForHarvest(
                      'Plot', 
                      '${_safeToString(scheduleData['plot'])}'
                    ),
                  ],
                ],
              ),
            ),
            
            pw.SizedBox(height: 15),
            
            // Status Panen
            pw.Container(
              padding: const pw.EdgeInsets.all(10),
              decoration: pw.BoxDecoration(
                border: pw.Border.all(),
                borderRadius: pw.BorderRadius.circular(5),
              ),
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'STATUS PANEN',
                    style: pw.TextStyle(
                      fontSize: 14,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.Divider(),
                  _buildInfoRowForHarvest('Status', status),
                  _buildInfoRowForHarvest('Keterangan', _getStatusDescription(status)),
                ],
              ),
            ),
            
            pw.SizedBox(height: 15),
            
            // Ringkasan Keuangan
            pw.Container(
              padding: const pw.EdgeInsets.all(10),
              decoration: pw.BoxDecoration(
                border: pw.Border.all(),
                borderRadius: pw.BorderRadius.circular(5),
              ),
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'RINGKASAN KEUANGAN',
                    style: pw.TextStyle(
                      fontSize: 14,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.Divider(),
                  _buildInfoRowForHarvest('Total Biaya Produksi', currency.format(totalCost)),
                  _buildInfoRowForHarvest('Pendapatan Kotor', currency.format(income)),
                  _buildInfoRowForHarvest('Keuntungan Bersih', currency.format(profit)),
                  _buildInfoRowForHarvest('Rasio Keuntungan', '${profitMargin.toStringAsFixed(2)}%'),
                  _buildInfoRowForHarvest('Produktivitas', '${productivity.toStringAsFixed(2)} kilogram/ha'),
                  
                  // Add RC Ratio & BC Ratio
                  if (totalCost > 0) ...[
                    _buildInfoRowForHarvest('R/C Ratio', (income / totalCost).toStringAsFixed(2)),
                    _buildInfoRowForHarvest('B/C Ratio', (profit / totalCost).toStringAsFixed(2)),
                  ],
                ],
              ),
            ),
            
            // If chart image is available, add it to the PDF
            if (chartImageBytes != null) ...[
              pw.SizedBox(height: 15),
              pw.Container(
                padding: const pw.EdgeInsets.all(10),
                decoration: pw.BoxDecoration(
                  border: pw.Border.all(),
                  borderRadius: pw.BorderRadius.circular(5),
                ),
                child: pw.Column(
                  crossAxisAlignment: pw.CrossAxisAlignment.start,
                  children: [
                    pw.Text(
                      'GRAFIK ANALISIS',
                      style: pw.TextStyle(
                        fontSize: 14,
                        fontWeight: pw.FontWeight.bold,
                      ),
                    ),
                    pw.Divider(),
                    pw.SizedBox(height: 5),
                    pw.Center(
                      child: pw.Image(
                        pw.MemoryImage(chartImageBytes),
                        width: 400,
                        height: 200,
                        fit: pw.BoxFit.contain,
                      ),
                    ),
                  ],
                ),
              ),
            ],
            
            pw.SizedBox(height: 15),
            
            // Rincian Biaya
            pw.Container(
              padding: const pw.EdgeInsets.all(10),
              decoration: pw.BoxDecoration(
                border: pw.Border.all(),
                borderRadius: pw.BorderRadius.circular(5),
              ),
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'RINCIAN BIAYA PRODUKSI',
                    style: pw.TextStyle(
                      fontSize: 14,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.Divider(),
                  _buildInfoRowForHarvest('Bibit', currency.format(_safeToDouble(harvestData['seed_cost']))),
                  _buildInfoRowForHarvest('Pupuk', currency.format(_safeToDouble(harvestData['fertilizer_cost']))),
                  _buildInfoRowForHarvest('Pestisida', currency.format(_safeToDouble(harvestData['pesticide_cost']))),
                  _buildInfoRowForHarvest('Tenaga Kerja', currency.format(_safeToDouble(harvestData['labor_cost']))),
                  _buildInfoRowForHarvest('Irigasi', currency.format(_safeToDouble(harvestData['irrigation_cost']))),
                  pw.Divider(),
                  _buildInfoRowForHarvest('Total', currency.format(totalCost), isBold: true),
                ],
              ),
            ),
            
            pw.SizedBox(height: 15),
            
            // Analisis dan Rekomendasi
            pw.Container(
              padding: const pw.EdgeInsets.all(10),
              decoration: pw.BoxDecoration(
                border: pw.Border.all(),
                borderRadius: pw.BorderRadius.circular(5),
              ),
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'ANALISIS & REKOMENDASI',
                    style: pw.TextStyle(
                      fontSize: 14,
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.Divider(),
                  pw.Text(_getAnalysisText(productivity, profitMargin)),
                  pw.SizedBox(height: 10),
                  pw.Text(
                    'Rekomendasi:',
                    style: pw.TextStyle(
                      fontWeight: pw.FontWeight.bold,
                    ),
                  ),
                  pw.SizedBox(height: 5),
                  pw.Text(_getRecommendation(status)),
                ],
              ),
            ),
            
            // Jika ada catatan harian, tambahkan tabel
            if (dailyLogs != null && dailyLogs.isNotEmpty) ...[
              pw.SizedBox(height: 15),
              
              pw.Text(
                'CATATAN HARIAN',
                style: pw.TextStyle(
                  fontSize: 14,
                  fontWeight: pw.FontWeight.bold,
                ),
              ),
              pw.SizedBox(height: 5),
              
              pw.Table(
                border: pw.TableBorder.all(),
                children: [
                  // Header
                  pw.TableRow(
                    children: [
                      _buildTableCell('Tanggal', isHeader: true),
                      _buildTableCell('Catatan', isHeader: true),
                      _buildTableCell('Biaya', isHeader: true),
                    ],
                  ),
                  // Data rows
                  ...dailyLogs.map((log) {
                    String dateStr;
                    try {
                      final date = DateTime.parse(_safeToString(log['date']));
                      dateStr = DateFormat('dd/MM/yyyy').format(date);
                    } catch (e) {
                      dateStr = '-';
                    }
                    
                    return pw.TableRow(
                      children: [
                        _buildTableCell(dateStr),
                        _buildTableCell(_safeToString(log['note'] ?? '-')),
                        _buildTableCell(currency.format(_safeToDouble(log['cost']))),
                      ],
                    );
                  }).toList(),
                ],
              ),
            ],
          ];
        },
      ),
    );

    // Simpan PDF ke direktori aplikasi (tidak memerlukan izin khusus)
    final directory = await getApplicationDocumentsDirectory();
    final filePath = '${directory.path}/$fileName';
    final file = File(filePath);
    await file.writeAsBytes(await pdf.save());
    debugPrint('PDF saved to: $filePath');
    return file;
  }
  
  pw.Widget _buildInfoRowForHarvest(String label, String value, {bool isBold = false}) {
    return pw.Padding(
      padding: const pw.EdgeInsets.symmetric(vertical: 3),
      child: pw.Row(
        crossAxisAlignment: pw.CrossAxisAlignment.start,
        children: [
          pw.SizedBox(
            width: 150,
            child: pw.Text(label),
          ),
          pw.Text(': '),
          pw.Expanded(
            child: pw.Text(
              value,
              style: isBold ? pw.TextStyle(fontWeight: pw.FontWeight.bold) : null,
            ),
          ),
        ],
      ),
    );
  }
  
  pw.Widget _buildTableCell(String text, {bool isHeader = false}) {
    return pw.Padding(
      padding: const pw.EdgeInsets.all(5),
      child: pw.Text(
        text,
        style: isHeader ? pw.TextStyle(fontWeight: pw.FontWeight.bold) : null,
      ),
    );
  }
  
  String _formatDate(String? dateStr) {
    if (dateStr == null || dateStr.isEmpty) return '-';
    try {
      final date = DateTime.parse(dateStr);
      return DateFormat('dd MMMM yyyy', 'id_ID').format(date);
    } catch (e) {
      return dateStr; // Kembalikan string asli jika parsing gagal
    }
  }
  
  // Fungsi untuk mengamankan konversi nilai ke string
  String _safeToString(dynamic value, {String defaultValue = '-'}) {
    if (value == null) return defaultValue;
    if (value is List && value.isEmpty) return defaultValue;
    if (value is String && value.isEmpty) return defaultValue;
    return value.toString();
  }
  
  // Fungsi untuk mengamankan konversi nilai ke double
  double _safeToDouble(dynamic value, {double defaultValue = 0.0}) {
    if (value == null) return defaultValue;
    if (value is int) return value.toDouble();
    if (value is double) return value;
    if (value is String) {
      try {
        return double.parse(value);
      } catch (e) {
        return defaultValue;
      }
    }
    return defaultValue;
  }
  
  String _getStatusDescription(String? status) {
    switch (status) {
      case 'Baik': 
        return 'Produktivitas dan profitabilitas optimal';
      case 'Cukup': 
        return 'Performa yang cukup baik, masih dapat ditingkatkan';
      case 'Kurang': 
        return 'Produktivitas dan profitabilitas perlu ditingkatkan';
      default: 
        return '';
    }
  }
  
  String _getAnalysisText(double productivity, double profitMargin) {
    String productivityText;
    if (productivity > 8000) {
      productivityText = 'Produktivitas lahan sangat tinggi (${productivity.toStringAsFixed(2)} kilogram/ha), menunjukkan praktik budidaya yang sangat baik.';
    } else if (productivity > 5000) {
      productivityText = 'Produktivitas lahan baik (${productivity.toStringAsFixed(2)} kilogram/ha), menunjukkan praktik budidaya yang efektif.';
    } else {
      productivityText = 'Produktivitas lahan kurang optimal (${productivity.toStringAsFixed(2)} kilogram/ha), ada ruang untuk peningkatan praktik budidaya.';
    }
    
    String profitText;
    if (profitMargin >= 30) {
      profitText = 'Rasio keuntungan sangat baik (${profitMargin.toStringAsFixed(2)}%), menunjukkan efisiensi biaya produksi yang tinggi.';
    } else if (profitMargin >= 15) {
      profitText = 'Rasio keuntungan cukup baik (${profitMargin.toStringAsFixed(2)}%), namun masih ada ruang untuk peningkatan efisiensi.';
    } else if (profitMargin > 0) {
      profitText = 'Rasio keuntungan minimal (${profitMargin.toStringAsFixed(2)}%), perlu evaluasi struktur biaya produksi.';
    } else {
      profitText = 'Mengalami kerugian dengan rasio (${profitMargin.toStringAsFixed(2)}%), memerlukan perubahan signifikan pada struktur biaya dan teknik produksi.';
    }
    
    return '$productivityText\n\n$profitText';
  }
  
  String _getRecommendation(String? status) {
    switch (status) {
      case 'Baik': 
        return 'Pertahankan praktik pertanian yang sudah baik. Pertimbangkan untuk memperluas area tanam atau mencoba varietas unggulan untuk meningkatkan keuntungan lebih lanjut.';
      case 'Cukup': 
        return 'Tingkatkan efisiensi biaya produksi, terutama pada komponen biaya terbesar. Pertimbangkan untuk mengoptimalkan penggunaan pupuk dan pestisida agar lebih tepat sasaran.';
      case 'Kurang': 
        return 'Evaluasi ulang teknik budidaya yang diterapkan. Pastikan pemilihan varietas yang tepat, perbaiki teknik pemupukan, dan kendalikan hama penyakit secara terpadu untuk meningkatkan produktivitas.';
      default: 
        return 'Belum dapat memberikan rekomendasi spesifik.';
    }
  }

  /// Buka file PDF
  Future<void> openPdf(File file) async {
    try {
      // Try using open_file package first
      final result = await OpenFile.open(file.path);
      
      if (result.type != ResultType.done) {
        throw Exception('Tidak dapat membuka file: ${result.message}');
      }
    } catch (e) {
      // If open_file fails, try an alternative approach
      debugPrint('Error opening PDF with OpenFile: $e');
      throw Exception('Gagal membuka PDF. Silakan coba bagikan file dan buka dengan aplikasi PDF lain.');
    }
  }
  
  /// Bagikan file PDF
  Future<void> sharePdf(File file) async {
    try {
      await Share.shareXFiles(
        [XFile(file.path)],
        text: 'Laporan Analisis Panen',
      );
    } catch (e) {
      debugPrint('Error sharing PDF: $e');
      throw Exception('Gagal membagikan PDF. Silakan coba lagi nanti.');
    }
  }

  Future<File> generateDiagnosisReportPdf({
    required DiagnosisResultModel diagnosisResult,
    required Uint8List? imageBytes,
  }) async {
    final pdf = pw.Document();
    final now = DateTime.now();
    final formattedDate = DateFormat('dd MMMM yyyy, HH:mm', 'id_ID').format(now);
    final fileName = 'laporan_diagnosis_${DateFormat('yyyyMMdd_HHmmss').format(now)}.pdf';

    final pw.TextStyle headingStyle = pw.TextStyle(fontSize: 22, fontWeight: pw.FontWeight.bold, color: PdfColors.green800);
    final pw.TextStyle subheadingStyle = pw.TextStyle(fontSize: 12, color: PdfColors.grey600);
    final pw.TextStyle sectionTitleStyle = pw.TextStyle(fontSize: 14, fontWeight: pw.FontWeight.bold, color: PdfColors.green700);
    final pw.TextStyle boldStyle = pw.TextStyle(fontWeight: pw.FontWeight.bold);
    
    final plantImage = imageBytes != null ? pw.Image(pw.MemoryImage(imageBytes), fit: pw.BoxFit.contain, height: 150) : pw.Container();

    pdf.addPage(
      pw.MultiPage(
        pageFormat: PdfPageFormat.a4.copyWith(
          marginLeft: 1.5 * PdfPageFormat.cm,
          marginRight: 1.5 * PdfPageFormat.cm,
          marginTop: 1.5 * PdfPageFormat.cm,
          marginBottom: 1.5 * PdfPageFormat.cm,
        ),
        header: (pw.Context context) {
          return pw.Column(
            children: [
              pw.Row(
                mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                children: [
                  pw.Text('Laporan Diagnosis Tanaman', style: headingStyle),
                  pw.Text(formattedDate, style: subheadingStyle),
                ]
              ),
              pw.Divider(height: 20, thickness: 1.5, color: PdfColors.green800),
            ]
          );
        },
        footer: (pw.Context context) {
          return pw.Center(
            child: pw.Text(
              'Halaman ${context.pageNumber} dari ${context.pagesCount} - Dihasilkan oleh TaniSM4RT',
              style: const pw.TextStyle(fontSize: 9, color: PdfColors.grey500),
            ),
          );
        },
        build: (pw.Context context) => [
          // Plant Image
          if (imageBytes != null)
            pw.Center(
              child: pw.Container(
                margin: const pw.EdgeInsets.only(bottom: 20),
                padding: const pw.EdgeInsets.all(5),
                decoration: pw.BoxDecoration(
                  border: pw.Border.all(color: PdfColors.grey300, width: 1),
                  borderRadius: pw.BorderRadius.circular(5),
                ),
                child: plantImage,
              ),
            ),
          
          // Plant Identification
          _buildDiagnosisSectionTitle('Identifikasi Tanaman'),
          _buildDiagnosisInfoRow('Spesies Tanaman', _safeToString(diagnosisResult.plantSpecies)),
          _buildDiagnosisInfoRow('Tahap Pertumbuhan', _safeToString(diagnosisResult.plantData['growthStage'])),
          _buildDiagnosisInfoRow('Status Kesehatan', diagnosisResult.isHealthy ? 'Sehat' : 'Tidak Sehat / Terindikasi Penyakit', 
            valueStyle: pw.TextStyle(fontWeight: pw.FontWeight.bold, color: diagnosisResult.isHealthy ? PdfColors.green600 : PdfColors.orange600)
          ),

          // Diagnosis Details (if not healthy)
          if (!diagnosisResult.isHealthy) ...[
            _buildDiagnosisSectionTitle('Detail Diagnosis Penyakit'),
            _buildDiagnosisInfoRow('Nama Penyakit', _safeToString(diagnosisResult.diseaseName)),
            _buildDiagnosisInfoRow('Nama Ilmiah', _safeToString(diagnosisResult.scientificName), valueStyle: pw.TextStyle(fontStyle: pw.FontStyle.italic)),
            _buildDiagnosisInfoRow('Bagian Terdampak', _safeToString(diagnosisResult.additionalInfo.affectedParts.join(', '))),
            _buildDiagnosisInfoRow('Kondisi Lingkungan Pemicu', _safeToString(diagnosisResult.additionalInfo.environmentalConditions)),
            
            if (diagnosisResult.plantData['diseaseSeverity'] != null || diagnosisResult.plantData['infectedArea'] != null)
              _buildDiagnosisSectionTitle('Tingkat Keparahan & Dampak', fontSize: 14),
            if (diagnosisResult.plantData['diseaseSeverity'] != null)
              _buildDiagnosisInfoRow('Tingkat Keparahan', '${(_safeToDouble(diagnosisResult.plantData['diseaseSeverity']) * 100).toStringAsFixed(0)}%'),
            if (diagnosisResult.plantData['infectedArea'] != null)
              _buildDiagnosisInfoRow('Estimasi Area Terinfeksi', '${(_safeToDouble(diagnosisResult.plantData['infectedArea']) * 100).toStringAsFixed(0)}%'),
            if (diagnosisResult.economicImpact['estimatedLoss'] != null && _safeToString(diagnosisResult.economicImpact['estimatedLoss']).isNotEmpty)
              _buildDiagnosisInfoRow('Potensi Kerugian Ekonomi', _safeToString(diagnosisResult.economicImpact['estimatedLoss'])),

            _buildDiagnosisListSection('Gejala yang Teramati', _safeToString(diagnosisResult.symptoms).split('\n')),
            _buildDiagnosisListSection('Kemungkinan Penyebab', _safeToString(diagnosisResult.causes).split('\n')),
          ],

          // Treatment and Prevention (if not healthy)
          if (!diagnosisResult.isHealthy) ...[
            _buildDiagnosisSectionTitle('Rekomendasi Penanganan & Pencegahan'),
            _buildDiagnosisListSection('Penanganan Organik', _safeToString(diagnosisResult.organicTreatment).split('\n')),
            _buildDiagnosisListSection('Penanganan Kimiawi', _safeToString(diagnosisResult.chemicalTreatment).split('\n')),
            _buildDiagnosisListSection('Langkah Pencegahan', _safeToString(diagnosisResult.preventionMeasures).split('\n')),
          ],

          // Environmental Data
          if (diagnosisResult.environmentalData.isNotEmpty && 
              diagnosisResult.environmentalData.values.any((v) => _safeToDouble(v) != 0.0)) ...[
            _buildDiagnosisSectionTitle('Data Lingkungan Saat Pengambilan Gambar'),
            if (_safeToDouble(diagnosisResult.environmentalData['temperature']) != 0.0)
              _buildDiagnosisInfoRow('Suhu Udara', '${_safeToDouble(diagnosisResult.environmentalData['temperature']).toStringAsFixed(1)} °C'),
            if (_safeToDouble(diagnosisResult.environmentalData['humidity']) != 0.0)
              _buildDiagnosisInfoRow('Kelembaban Udara', '${_safeToDouble(diagnosisResult.environmentalData['humidity']).toStringAsFixed(0)} %'),
            if (_safeToDouble(diagnosisResult.environmentalData['lightIntensity']) != 0.0)
              _buildDiagnosisInfoRow('Intensitas Cahaya', '${_safeToDouble(diagnosisResult.environmentalData['lightIntensity']).toStringAsFixed(0)} lux'),
          ],
          
          pw.SizedBox(height: 30),
          pw.Text(
            'Catatan: Laporan ini dihasilkan berdasarkan analisis gambar dan data yang diberikan. Validasi lapangan oleh ahli pertanian mungkin diperlukan untuk diagnosis yang lebih akurat dan tindakan yang lebih tepat.',
            style: pw.TextStyle(fontSize: 9, fontStyle: pw.FontStyle.italic, color: PdfColors.grey700),
            textAlign: pw.TextAlign.justify,
          ),
        ],
      ),
    );

    // Save the PDF using the appropriate helper based on platform
    final bytes = await pdf.save();
    return savePdfFile(fileName, bytes);
  }

  pw.Widget _buildDiagnosisSectionTitle(String title, {PdfColor color = PdfColors.green800, double fontSize = 16}) {
    return pw.Padding(
      padding: const pw.EdgeInsets.only(top: 15, bottom: 8),
      child: pw.Text(
        title.toUpperCase(),
        style: pw.TextStyle(fontWeight: pw.FontWeight.bold, fontSize: fontSize, color: color),
      ),
    );
  }

  pw.Widget _buildDiagnosisInfoRow(String label, String value, {bool isBoldValue = false, pw.TextStyle? valueStyle}) {
    return pw.Padding(
      padding: const pw.EdgeInsets.symmetric(vertical: 2.5),
      child: pw.Row(
        crossAxisAlignment: pw.CrossAxisAlignment.start,
        children: [
          pw.SizedBox(width: 130, child: pw.Text(label, style: pw.TextStyle(fontWeight: pw.FontWeight.bold))),
          pw.Text(':  ', style: pw.TextStyle(fontWeight: pw.FontWeight.bold)),
          pw.Expanded(child: pw.Text(value, style: valueStyle ?? (isBoldValue ? pw.TextStyle(fontWeight: pw.FontWeight.bold) : null))),
        ],
      ),
    );
  }
  
  pw.Widget _buildDiagnosisListSection(String title, List<String> items, {PdfColor iconColor = PdfColors.green700}) {
    if (items.isEmpty || items.every((item) => item.trim().isEmpty || item == '-')) {
      return pw.Container();
    }
    return pw.Column(
      crossAxisAlignment: pw.CrossAxisAlignment.start,
      children: [
        _buildDiagnosisSectionTitle(title, fontSize: 14),
        pw.SizedBox(height: 4),
        ...items.map((item) => pw.Padding(
          padding: const pw.EdgeInsets.only(left: 10, bottom: 4),
          child: pw.Row(
            crossAxisAlignment: pw.CrossAxisAlignment.start,
            children: [
              pw.Text('• ', style: pw.TextStyle(fontWeight: pw.FontWeight.bold, color: iconColor)),
              pw.Expanded(child: pw.Text(item)),
            ],
          ),
        )).toList(),
      ],
    );
  }
}