import 'dart:convert';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:http/http.dart' as http;
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:printing/printing.dart';

import '../layout/main_layout.dart';
import 'bidan_drawer.dart';
import '../bidan/dashboard_bidan.dart';

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

  @override
  State<DataLaporanPage> createState() => _DataLaporanPageStatus();
}

class _DataLaporanPageStatus extends State<DataLaporanPage> {
  int _currentPage = 0;
  final int _rowsPerPage = 10;
  String _searchQuery = "";
  List<dynamic> _allData = [];

  final List<String> _namaBulan = [
    "Januari",
    "Februari",
    "Maret",
    "April",
    "Mei",
    "Juni",
    "Juli",
    "Agustus",
    "September",
    "Oktober",
    "November",
    "Desember"
  ];

  Future<Map<String, dynamic>> fetchPemeriksaanBalita() async {
    try {
      final response = await http.get(Uri.parse(
          'http://ta.myhost.id/E31230549/mposyandu_api/laporan/get_laporan.php'));

      if (response.statusCode == 200) {
        Map<String, dynamic> data = json.decode(response.body);
        _allData = data['data'] ?? [];
        return data;
      } else {
        throw Exception('Gagal mengambil data dari database');
      }
    } catch (e) {
      throw Exception('Kesalahan koneksi: $e');
    }
  }

  void _showMonthSelectionDialog() async {
    List<int> selectedMonths = [];

    await showDialog(
      context: context,
      builder: (context) {
        return StatefulBuilder(
          builder: (context, setDialogState) {
            return AlertDialog(
              shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(12)),
              title: Text("Pilih Bulan",
                  style: GoogleFonts.poppins(
                      fontSize: 16, fontWeight: FontWeight.bold)),
              content: SizedBox(
                width: 300,
                height: 300,
                child: GridView.builder(
                  shrinkWrap: true,
                  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
                    crossAxisCount: 2,
                    childAspectRatio: 3,
                  ),
                  itemCount: _namaBulan.length,
                  itemBuilder: (context, index) {
                    return CheckboxListTile(
                      contentPadding: EdgeInsets.zero,
                      title: Text(_namaBulan[index],
                          style: GoogleFonts.poppins(fontSize: 12)),
                      value: selectedMonths.contains(index + 1),
                      controlAffinity: ListTileControlAffinity.leading,
                      onChanged: (bool? value) {
                        setDialogState(() {
                          if (value == true) {
                            selectedMonths.add(index + 1);
                          } else {
                            selectedMonths.remove(index + 1);
                          }
                        });
                      },
                    );
                  },
                ),
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.pop(context),
                  child: Text("Batal",
                      style: GoogleFonts.poppins(color: Colors.grey)),
                ),
                ElevatedButton(
                  style: ElevatedButton.styleFrom(backgroundColor: Colors.blue),
                  onPressed: () {
                    Navigator.pop(context);
                    if (selectedMonths.isNotEmpty) {
                      _generateFilteredPdf(selectedMonths);
                    }
                  },
                  child: Text("Cetak",
                      style: GoogleFonts.poppins(color: Colors.white)),
                ),
              ],
            );
          },
        );
      },
    );
  }

  // ================= GENERATE PDF DENGAN REKAP GIZI BARU =================
  Future<void> _generateFilteredPdf(List<int> selectedMonths) async {
    List<dynamic> filteredData = _allData.where((item) {
      final tglString = item['tgl_periksa']?.toString() ?? '';
      if (tglString.isEmpty || tglString == '-') return false;
      try {
        final parts = tglString.split('-');
        if (parts.length != 3) return false;
        final bulan = int.parse(parts[1]);
        return selectedMonths.contains(bulan);
      } catch (e) {
        return false;
      }
    }).toList();

    if (filteredData.isEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
            content: Text("Tidak ada data pada bulan yang dipilih"),
            backgroundColor: Colors.orange),
      );
      return;
    }

    // Variabel Rekapitulasi (Sudah digunakan di bawah agar garis kuning hilang)
    int bbuGiziBuruk = 0,
        bbuGiziKurang = 0,
        bbuGiziBaik = 0,
        bbuRisikoLebih = 0;
    int tbuSangatPendek = 0, tbuPendek = 0, tbuNormal = 0, tbuTinggi = 0;
    int bbtbGiziBuruk = 0,
        bbtbGiziKurang = 0,
        bbtbGiziBaik = 0,
        bbtbRisikoLebih = 0,
        bbtbObesitas = 0;

    for (var item in filteredData) {
      String bbu = (item['status_bbu'] ?? '').toString().trim().toLowerCase();
      String tbu = (item['status_tbu'] ?? '').toString().trim().toLowerCase();
      String bbtb = (item['status_bbtb'] ?? '').toString().trim().toLowerCase();

      if (bbu.contains('buruk'))
        bbuGiziBuruk++;
      else if (bbu.contains('kurang'))
        bbuGiziKurang++;
      else if (bbu.contains('baik') || bbu.contains('normal'))
        bbuGiziBaik++;
      else if (bbu.contains('lebih')) bbuRisikoLebih++;

      if (tbu.contains('sangat pendek'))
        tbuSangatPendek++;
      else if (tbu.contains('pendek') || tbu.contains('stunting'))
        tbuPendek++;
      else if (tbu.contains('normal'))
        tbuNormal++;
      else if (tbu.contains('tinggi')) tbuTinggi++;

      if (bbtb.contains('buruk') || bbtb.contains('wasting'))
        bbtbGiziBuruk++;
      else if (bbtb.contains('kurang'))
        bbtbGiziKurang++;
      else if (bbtb.contains('baik') || bbtb.contains('normal'))
        bbtbGiziBaik++;
      else if (bbtb.contains('risiko') || bbtb.contains('overweight'))
        bbtbRisikoLebih++;
      else if (bbtb.contains('obesitas')) bbtbObesitas++;
    }

    final pdf = pw.Document();
    pw.MemoryImage? logoImage;

    try {
      final ByteData assetImage =
          await rootBundle.load('assets/images/logo sumberasih.png');
      logoImage = pw.MemoryImage(assetImage.buffer.asUint8List());
    } catch (e) {
      debugPrint("Logo gagal dimuat");
    }

    const int pdfItemsPerPage = 12;
    final int totalPages = (filteredData.length / pdfItemsPerPage).ceil();
    final currentYear = DateTime.now().year;

    for (int i = 0; i < totalPages; i++) {
      final int start = i * pdfItemsPerPage;
      final int end = (start + pdfItemsPerPage < filteredData.length)
          ? start + pdfItemsPerPage
          : filteredData.length;
      final List<dynamic> pageData = filteredData.sublist(start, end);

      pdf.addPage(
        pw.Page(
          pageFormat: PdfPageFormat.a4.landscape,
          margin: const pw.EdgeInsets.all(15),
          build: (pw.Context context) {
            return pw.Column(
              crossAxisAlignment: pw.CrossAxisAlignment.start,
              children: [
                // ================= HEADER =================
                pw.Row(
                  crossAxisAlignment: pw.CrossAxisAlignment.center,
                  children: [
                    if (logoImage != null)
                      pw.Container(
                          width: 50, height: 50, child: pw.Image(logoImage)),
                    pw.SizedBox(width: 15),
                    pw.Expanded(
                      child: pw.Column(
                        children: [
                          pw.Text("LAPORAN KEGIATAN KUNJUNGAN BALITA",
                              style: pw.TextStyle(
                                  fontSize: 16,
                                  fontWeight: pw.FontWeight.bold)),
                          pw.SizedBox(height: 2),
                          pw.Text("Posyandu Desa Mentor",
                              style: const pw.TextStyle(fontSize: 11)),
                          pw.Text("Kecamatan Sumberasih, Kabupaten Probolinggo",
                              style: const pw.TextStyle(fontSize: 11)),
                          pw.SizedBox(height: 2),
                          pw.Text(
                              "Bulan: ${selectedMonths.map((m) => _namaBulan[m - 1]).join(', ')} $currentYear",
                              style: pw.TextStyle(
                                  fontSize: 10,
                                  fontWeight: pw.FontWeight.bold)),
                        ],
                      ),
                    ),
                  ],
                ),
                pw.SizedBox(height: 5),
                pw.Divider(thickness: 1.5),
                pw.SizedBox(height: 5),

                // ================= TABEL DATA =================
                pw.TableHelper.fromTextArray(
                  border:
                      pw.TableBorder.all(color: PdfColors.grey700, width: 0.5),
                  cellAlignment: pw.Alignment.centerLeft,
                  headerAlignment: pw.Alignment.center,
                  headers: [
                    'No',
                    'NIK',
                    'Nama Balita',
                    'Orang Tua',
                    'TTL',
                    'Umur',
                    'JK',
                    'Anak',
                    'Alamat',
                    'Tgl Periksa',
                    'BB',
                    'TB',
                    'LK',
                    'Imunisasi',
                    'BB/U',
                    'TB/U',
                    'BB/TB',
                    'Hadir'
                  ],
                  data: List<List<dynamic>>.generate(pageData.length, (index) {
                    final data = pageData[index];
                    return [
                      (start + index + 1).toString(),
                      data['nik_balita'] ?? "-",
                      data['nama'] ?? "-",
                      data['nama_orang_tua'] ?? "-",
                      "${data['tempat_lahir'] ?? '-'}, ${data['tgl_lahir'] ?? '-'}",
                      "${data['umur'] ?? '-'} Bln",
                      data['jenis_kelamin'] ?? "-",
                      data['anak_ke']?.toString() ?? "-",
                      data['alamat_lengkap'] ?? "-",
                      data['tgl_periksa'] ?? "-",
                      data['berat_badan']?.toString() ?? "-",
                      data['tinggi_badan']?.toString() ?? "-",
                      data['lingkar_kepala']?.toString() ?? "-",
                      data['pemberian_imunisasi'] ?? "-",
                      data['status_bbu'] ?? "-",
                      data['status_tbu'] ?? "-",
                      data['status_bbtb'] ?? "-",
                      data['kehadiran_posyandu'] ?? "-",
                    ];
                  }),
                  headerStyle: pw.TextStyle(
                      fontSize: 7,
                      fontWeight: pw.FontWeight.bold,
                      color: PdfColors.white),
                  headerDecoration:
                      const pw.BoxDecoration(color: PdfColors.blue700),
                  cellStyle: const pw.TextStyle(fontSize: 6.5),
                  cellHeight: 24,
                  columnWidths: {
                    0: const pw.FixedColumnWidth(20),
                    1: const pw.FixedColumnWidth(60),
                    2: const pw.FixedColumnWidth(65),
                    3: const pw.FixedColumnWidth(70),
                    4: const pw.FixedColumnWidth(75),
                    5: const pw.FixedColumnWidth(30),
                    6: const pw.FixedColumnWidth(20),
                    7: const pw.FixedColumnWidth(25),
                    8: const pw.FixedColumnWidth(90),
                    9: const pw.FixedColumnWidth(45),
                    10: const pw.FixedColumnWidth(25),
                    11: const pw.FixedColumnWidth(25),
                    12: const pw.FixedColumnWidth(25),
                    13: const pw.FixedColumnWidth(50),
                    14: const pw.FixedColumnWidth(50),
                    15: const pw.FixedColumnWidth(50),
                    16: const pw.FixedColumnWidth(50),
                    17: const pw.FixedColumnWidth(40),
                  },
                ),

                // ================= FOOTER REKAPITULASI (HALAMAN TERAKHIR) =================
                if (i == totalPages - 1) ...[
                  pw.SizedBox(height: 12),
                  pw.Row(
                    // PERBAIKAN: Menggunakan pw.MainAxisAlignment.spaceBetween agar tidak error garis merah
                    mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                    crossAxisAlignment: pw.CrossAxisAlignment.start,
                    children: [
                      pw.Text("Total Data: ${filteredData.length} Anak",
                          style: pw.TextStyle(
                              fontSize: 9, fontWeight: pw.FontWeight.bold)),
                      pw.Container(
                        width: 480,
                        padding: const pw.EdgeInsets.all(6),
                        decoration: pw.BoxDecoration(
                            border: pw.Border.all(
                                color: PdfColors.black, width: 0.5)),
                        child: pw.Column(
                          crossAxisAlignment: pw.CrossAxisAlignment.start,
                          children: [
                            pw.Text("Keterangan Rekapitulasi Status Gizi",
                                style: pw.TextStyle(
                                    fontWeight: pw.FontWeight.bold,
                                    fontSize: 9)),
                            pw.SizedBox(height: 4),
                            pw.Row(
                              mainAxisAlignment:
                                  pw.MainAxisAlignment.spaceBetween,
                              children: [
                                pw.Column(
                                  crossAxisAlignment:
                                      pw.CrossAxisAlignment.start,
                                  children: [
                                    pw.Text("[BB/U] Berat Badan / Umur:",
                                        style: pw.TextStyle(
                                            fontSize: 7,
                                            fontWeight: pw.FontWeight.bold)),
                                    pw.Text(
                                        "- Gizi Baik: $bbuGiziBaik\n- Gizi Kurang: $bbuGiziKurang\n- Gizi Buruk: $bbuGiziBuruk\n- Risiko Lebih: $bbuRisikoLebih",
                                        style: const pw.TextStyle(fontSize: 7)),
                                  ],
                                ),
                                pw.Column(
                                  crossAxisAlignment:
                                      pw.CrossAxisAlignment.start,
                                  children: [
                                    pw.Text("[TB/U] Tinggi Badan / Umur:",
                                        style: pw.TextStyle(
                                            fontSize: 7,
                                            fontWeight: pw.FontWeight.bold)),
                                    pw.Text(
                                        "- Normal: $tbuNormal\n- Pendek: $tbuPendek\n- Sangat Pendek: $tbuSangatPendek\n- Tinggi: $tbuTinggi",
                                        style: const pw.TextStyle(fontSize: 7)),
                                  ],
                                ),
                                pw.Column(
                                  crossAxisAlignment:
                                      pw.CrossAxisAlignment.start,
                                  children: [
                                    pw.Text("[BB/TB] Berat Badan / Tinggi:",
                                        style: pw.TextStyle(
                                            fontSize: 7,
                                            fontWeight: pw.FontWeight.bold)),
                                    pw.Text(
                                        "- Normal: $bbtbGiziBaik\n- Gizi Kurang: $bbtbGiziKurang\n- Gizi Buruk: $bbtbGiziBuruk\n- Overweight: $bbtbRisikoLebih\n- Obesitas: $bbtbObesitas",
                                        style: const pw.TextStyle(fontSize: 7)),
                                  ],
                                ),
                              ],
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ],
              ],
            );
          },
        ),
      );
    }

    await Printing.layoutPdf(
        onLayout: (PdfPageFormat format) async => pdf.save());
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: false,
      onPopInvokedWithResult: (didPop, result) async {
        if (didPop) return;
        Navigator.pushAndRemoveUntil(
            context,
            MaterialPageRoute(builder: (_) => const DashboardBidanPage()),
            (route) => false);
      },
      child: MainLayout(
        title: "",
        drawer: const BidanDrawer(),
        body: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Center(
                child: Text("Laporan Pemeriksaan Balita",
                    style: GoogleFonts.poppins(
                        fontSize: 18, fontWeight: FontWeight.w600)),
              ),
              const SizedBox(height: 10),
              Align(
                alignment: Alignment.centerRight,
                child: SizedBox(
                  height: 35,
                  child: OutlinedButton.icon(
                    onPressed: () => _allData.isNotEmpty
                        ? _showMonthSelectionDialog()
                        : null,
                    icon: const Icon(Icons.print, size: 16, color: Colors.blue),
                    label: Text("Cetak PDF",
                        style: GoogleFonts.poppins(
                            fontSize: 11,
                            color: Colors.blue,
                            fontWeight: FontWeight.w500)),
                    style: OutlinedButton.styleFrom(
                      backgroundColor: Colors.white,
                      side: const BorderSide(color: Colors.blue, width: 1),
                      shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.circular(6)),
                    ),
                  ),
                ),
              ),
              const SizedBox(height: 15),
              TextField(
                onChanged: (value) => setState(() {
                  _searchQuery = value;
                  _currentPage = 0;
                }),
                style: GoogleFonts.poppins(fontSize: 12),
                decoration: InputDecoration(
                  hintText: "Cari nama balita...",
                  prefixIcon: const Icon(Icons.search, size: 20),
                  border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(10)),
                  contentPadding: const EdgeInsets.symmetric(vertical: 0),
                ),
              ),
              const SizedBox(height: 20),
              Row(
                children: [
                  const Icon(Icons.swipe_left_alt,
                      size: 14, color: Colors.grey),
                  const SizedBox(width: 5),
                  Text("Geser ke kanan untuk melihat lebih lanjut",
                      style: GoogleFonts.poppins(
                          fontSize: 10,
                          color: Colors.grey.shade600,
                          fontStyle: FontStyle.italic)),
                ],
              ),
              const SizedBox(height: 5),
              Expanded(
                child: FutureBuilder<Map<String, dynamic>>(
                  future: fetchPemeriksaanBalita(),
                  builder: (context, snapshot) {
                    if (snapshot.connectionState == ConnectionState.waiting)
                      return const Center(child: CircularProgressIndicator());
                    if (snapshot.hasError)
                      return Center(child: Text("Error: ${snapshot.error}"));

                    final List<dynamic> rawData = snapshot.data?['data'] ?? [];
                    final filteredData = rawData
                        .where((item) => item["nama"]
                            .toString()
                            .toLowerCase()
                            .contains(_searchQuery.toLowerCase()))
                        .toList();

                    if (filteredData.isEmpty)
                      return const Center(child: Text("Data tidak ditemukan"));

                    final totalPages =
                        (filteredData.length / _rowsPerPage).ceil();
                    final start = _currentPage * _rowsPerPage;
                    final end = (start + _rowsPerPage > filteredData.length)
                        ? filteredData.length
                        : start + _rowsPerPage;
                    final paginatedData = filteredData.sublist(start, end);

                    return Column(
                      children: [
                        Expanded(
                          child: SingleChildScrollView(
                            scrollDirection: Axis.vertical,
                            child: SingleChildScrollView(
                              scrollDirection: Axis.horizontal,
                              child: _buildTable(paginatedData, start),
                            ),
                          ),
                        ),
                        _buildPaginationControls(totalPages),
                      ],
                    );
                  },
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildTable(List<dynamic> dataList, int startIndex) {
    return DataTable(
      headingRowColor: WidgetStateProperty.all(Colors.blue.shade600),
      columnSpacing: 18,
      horizontalMargin: 10,
      columns: [
        _headerCell("No"),
        _headerCell("NIK"),
        _headerCell("Nama Balita"),
        _headerCell("Nama Orang Tua"),
        _headerCell("TTL"),
        _headerCell("Umur"),
        _headerCell("JK"),
        _headerCell("Anak Ke"),
        _headerCell("Alamat"),
        _headerCell("Tgl Periksa"),
        _headerCell("BB (kg)"),
        _headerCell("TB (cm)"),
        _headerCell("LK (cm)"),
        _headerCell("Imunisasi"),
        _headerCell("BB/U"),
        _headerCell("TB/U"),
        _headerCell("BB/TB"),
        _headerCell("Kehadiran"),
      ],
      rows: List.generate(dataList.length, (index) {
        final data = dataList[index];
        return DataRow(cells: [
          DataCell(_textCell((startIndex + index + 1).toString())),
          DataCell(_textCell(data['nik_balita'] ?? "-")),
          DataCell(_textCell(data['nama'] ?? "-")),
          DataCell(_textCell(data['nama_orang_tua'] ?? "-")),
          DataCell(_textCell(
              "${data['tempat_lahir'] ?? ''}, ${data['tgl_lahir'] ?? ''}")),
          DataCell(_textCell("${data['umur'] ?? '-'} Bln")),
          DataCell(_textCell(data['jenis_kelamin'] ?? "-")),
          DataCell(_textCell(data['anak_ke']?.toString() ?? "-")),
          DataCell(_textCell(data['alamat_lengkap'] ?? "-")),
          DataCell(_textCell(data['tgl_periksa'] ?? "-")),
          DataCell(_textCell(data['berat_badan']?.toString() ?? "-")),
          DataCell(_textCell(data['tinggi_badan']?.toString() ?? "-")),
          DataCell(_textCell(data['lingkar_kepala']?.toString() ?? "-")),
          DataCell(_textCell(data['pemberian_imunisasi'] ?? "-")),
          DataCell(_statusGiziBadge(data['status_bbu'])),
          DataCell(_statusGiziBadge(data['status_tbu'])),
          DataCell(_statusGiziBadge(data['status_bbtb'])),
          DataCell(_textCell(data['kehadiran_posyandu'] ?? "-")),
        ]);
      }),
    );
  }

  DataColumn _headerCell(String label) => DataColumn(
      label: Text(label,
          style: GoogleFonts.poppins(
              color: Colors.white, fontWeight: FontWeight.bold, fontSize: 11)));

  Widget _textCell(String text) =>
      Text(text, style: GoogleFonts.poppins(fontSize: 11));

  Widget _statusGiziBadge(String? status) {
    if (status == null || status == "-") return _textCell("-");

    String normalValue = status.toLowerCase();
    Color color = Colors.grey;

    if (normalValue.contains('baik') || normalValue.contains('normal')) {
      color = Colors.green;
    } else if (normalValue.contains('kurang') ||
        normalValue.contains('pendek')) {
      color = Colors.orange;
    } else if (normalValue.contains('buruk') ||
        normalValue.contains('sangat pendek') ||
        normalValue.contains('wasting')) {
      color = Colors.red;
    } else if (normalValue.contains('lebih') ||
        normalValue.contains('obesitas') ||
        normalValue.contains('overweight')) {
      color = Colors.purple;
    }

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 4),
      decoration:
          BoxDecoration(color: color, borderRadius: BorderRadius.circular(4)),
      child: Text(status,
          style: GoogleFonts.poppins(
              color: Colors.white, fontSize: 9, fontWeight: FontWeight.bold)),
    );
  }

  Widget _buildPaginationControls(int totalPages) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 10),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text("Halaman ${_currentPage + 1} dari $totalPages",
              style: GoogleFonts.poppins(fontSize: 11)),
          Row(
            children: [
              IconButton(
                  icon: const Icon(Icons.arrow_back_ios, size: 16),
                  onPressed: _currentPage == 0
                      ? null
                      : () => setState(() => _currentPage--)),
              IconButton(
                  icon: const Icon(Icons.arrow_forward_ios, size: 16),
                  onPressed: _currentPage >= totalPages - 1
                      ? null
                      : () => setState(() => _currentPage++)),
            ],
          ),
        ],
      ),
    );
  }
}