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

class PendapatanPage extends StatefulWidget {
  final String token;

  const PendapatanPage({super.key, required this.token});

  @override
  State<PendapatanPage> createState() => _PendapatanPageState();
}

class _PendapatanPageState extends State<PendapatanPage> {
  List<dynamic> bookings = [];
  bool isLoading = false;

  final Color primaryColor = const Color(0xFFF06292);
  final Color backgroundColor = const Color(0xFFFFF6F9);

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

  Future<void> fetchBookings() async {
    setState(() => isLoading = true);
    try {
      final response = await http.get(
        Uri.parse('http://angeliasalon.my.id/api/bookings'),
        headers: {
          'Authorization': 'Bearer ${widget.token}',
          'Accept': 'application/json',
        },
      );

      if (response.statusCode == 200) {
        final data = json.decode(response.body);
        setState(() {
          bookings = data;
          isLoading = false;
        });
      } else {
        throw Exception('Gagal memuat data booking');
      }
    } catch (e) {
      setState(() => isLoading = false);
      _showErrorSnackBar('Error: $e');
    }
  }

  void _showErrorSnackBar(String message) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text(message), backgroundColor: Colors.red.shade600),
    );
  }

  Map<String, List<dynamic>> groupBookingsByMonth() {
    Map<String, List<dynamic>> result = {};
    for (var booking in bookings) {
      final tanggal = booking['tanggal_booking'] ?? '0000-00-00';
      final bulan = tanggal.substring(0, 7); // yyyy-MM
      result.putIfAbsent(bulan, () => []);
      result[bulan]!.add(booking);
    }
    return result;
  }

  int getTotalPendapatanPerMonth(List<dynamic> bookingsInMonth) {
    int total = 0;
    for (var booking in bookingsInMonth) {
      total += (booking['service']?['price'] ?? 0) as int;
    }
    return total;
  }

  String formatRupiah(int angka) {
    return 'Rp ${angka.toString().replaceAllMapped(
      RegExp(r'(\d{1,3})(?=(\d{3})+(?!\d))'),
      (m) => '${m[1]}.',
    )}';
  }

  String getNamaBulan(String bulanAngka) {
    const namaBulan = {
      '01': 'Januari',
      '02': 'Februari',
      '03': 'Maret',
      '04': 'April',
      '05': 'Mei',
      '06': 'Juni',
      '07': 'Juli',
      '08': 'Agustus',
      '09': 'September',
      '10': 'Oktober',
      '11': 'November',
      '12': 'Desember',
    };

    try {
      final parts = bulanAngka.split('-'); // yyyy-MM
      if (parts.length == 2) {
        final tahun = parts[0];
        final bulan = namaBulan[parts[1]] ?? parts[1];
        return '$bulan $tahun';
      }
      return bulanAngka;
    } catch (_) {
      return bulanAngka;
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: backgroundColor,
      appBar: AppBar(
        title: const Text('Pendapatan'),
        backgroundColor: primaryColor,
        foregroundColor: Colors.white,
      ),
      body: isLoading
          ? const Center(child: CircularProgressIndicator())
          : bookings.isEmpty
              ? const Center(child: Text('Tidak ada data booking'))
              : RefreshIndicator(
                  onRefresh: fetchBookings,
                  child: ListView(
                    padding: const EdgeInsets.all(12),
                    children: [
                      ...groupBookingsByMonth().entries.map((entry) {
                        final bulan = entry.key;
                        final bookingsInMonth = entry.value;
                        final total = getTotalPendapatanPerMonth(bookingsInMonth);

                        return Card(
                          margin: const EdgeInsets.symmetric(vertical: 8),
                          elevation: 4,
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(16),
                          ),
                          child: ListTile(
                            title: Text(
                              'Bulan: ${getNamaBulan(bulan)}',
                              style: TextStyle(
                                fontWeight: FontWeight.bold,
                                color: primaryColor,
                              ),
                            ),
                            subtitle: Text('Total: ${formatRupiah(total)}'),
                            trailing: ElevatedButton(
                              onPressed: () {
                                Navigator.push(
                                  context,
                                  MaterialPageRoute(
                                    builder: (_) => DetailPendapatanPage(
                                      bulan: bulan,
                                      bookingsInMonth: bookingsInMonth,
                                      primaryColor: primaryColor,
                                    ),
                                  ),
                                );
                              },
                              style: ElevatedButton.styleFrom(
                                backgroundColor: primaryColor,
                                foregroundColor: Colors.white,
                              ),
                              child: const Text('Detail'),
                            ),
                          ),
                        );
                      }),
                    ],
                  ),
                ),
    );
  }
}


class DetailPendapatanPage extends StatelessWidget {
  final String bulan;
  final List<dynamic> bookingsInMonth;
  final Color primaryColor;

  const DetailPendapatanPage({
    super.key,
    required this.bulan,
    required this.bookingsInMonth,
    required this.primaryColor,
  });

  String formatRupiah(int angka) {
    return 'Rp ${angka.toString().replaceAllMapped(
      RegExp(r'(\d{1,3})(?=(\d{3})+(?!\d))'),
      (m) => '${m[1]}.',
    )}';
  }

  String formatTanggal(String tanggal) {
    try {
      final parts = tanggal.split('-');
      if (parts.length == 3) {
        return '${parts[2]}-${parts[1]}-${parts[0]}';
      }
      return tanggal;
    } catch (_) {
      return tanggal;
    }
  }

  String getNamaBulan(String bulanAngka) {
    const namaBulan = {
      '01': 'Januari',
      '02': 'Februari',
      '03': 'Maret',
      '04': 'April',
      '05': 'Mei',
      '06': 'Juni',
      '07': 'Juli',
      '08': 'Agustus',
      '09': 'September',
      '10': 'Oktober',
      '11': 'November',
      '12': 'Desember',
    };

    try {
      final parts = bulanAngka.split('-'); // yyyy-MM
      if (parts.length == 2) {
        final tahun = parts[0];
        final bulan = namaBulan[parts[1]] ?? parts[1];
        return '$bulan $tahun';
      }
      return bulanAngka;
    } catch (_) {
      return bulanAngka;
    }
  }

  Future<Uint8List> generatePdf(BuildContext context) async {
    final pdf = pw.Document();
    final groupedByDate = <String, List<dynamic>>{};

    for (var booking in bookingsInMonth) {
      final tanggal = booking['tanggal_booking'] ?? 'Tidak diketahui';
      groupedByDate.putIfAbsent(tanggal, () => []);
      groupedByDate[tanggal]!.add(booking);
    }

    int totalBulan = 0;

    pdf.addPage(
      pw.MultiPage(
        pageFormat: PdfPageFormat.a4,
        build: (context) {
          List<pw.Widget> widgets = [
            pw.Text(
              'Laporan Pendapatan Bulan ${getNamaBulan(bulan)}',
              style: pw.TextStyle(fontSize: 18, fontWeight: pw.FontWeight.bold),
            ),
            pw.SizedBox(height: 10),
          ];

          for (var entry in groupedByDate.entries) {
            final tanggal = entry.key;
            final layananMap = <String, List<dynamic>>{};

            for (var booking in entry.value) {
              final nama = booking['service']?['name'] ?? 'Tidak diketahui';
              layananMap.putIfAbsent(nama, () => []);
              layananMap[nama]!.add(booking);
            }

            int totalTanggal = 0;
            layananMap.forEach((_, list) {
              final price = list[0]['service']?['price'] ?? 0;
              totalTanggal += (price as int) * list.length;
            });

            totalBulan += totalTanggal;

            widgets.addAll([
              pw.Text(
                formatTanggal(tanggal),
                style: pw.TextStyle(fontWeight: pw.FontWeight.bold),
              ),
              pw.SizedBox(height: 4),
              ...layananMap.entries.map((e) {
                final nama = e.key;
                final list = e.value;
                final harga = list[0]['service']?['price'] ?? 0;
                return pw.Row(
                  mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                  children: [
                    pw.Text('$nama (${list.length}x)'),
                    pw.Text(formatRupiah((harga as int) * list.length)),
                  ],
                );
              }),
              pw.SizedBox(height: 6),
              pw.Container(
                alignment: pw.Alignment.centerRight,
                child: pw.Text(
                  'Total: ${formatRupiah(totalTanggal)}',
                  style: pw.TextStyle(fontWeight: pw.FontWeight.bold),
                ),
              ),
              pw.SizedBox(height: 10),
              pw.Divider(),
            ]);
          }

          // Tambahkan total keseluruhan di akhir
          widgets.addAll([
            pw.SizedBox(height: 16),
            pw.Divider(),
            pw.Container(
              alignment: pw.Alignment.centerRight,
              child: pw.Text(
                'Total Pendapatan Bulan Ini: ${formatRupiah(totalBulan)}',
                style: pw.TextStyle(fontSize: 16, fontWeight: pw.FontWeight.bold),
              ),
            ),
          ]);

          return widgets;
        },
      ),
    );

    return pdf.save();
  }

  @override
  Widget build(BuildContext context) {
    final groupedByDate = <String, List<dynamic>>{};
    for (var booking in bookingsInMonth) {
      final tanggal = booking['tanggal_booking'] ?? 'Tidak diketahui';
      groupedByDate.putIfAbsent(tanggal, () => []);
      groupedByDate[tanggal]!.add(booking);
    }

    return Scaffold(
      appBar: AppBar(
        title: Text('Detail Bulan ${getNamaBulan(bulan)}'),
        backgroundColor: primaryColor,
        foregroundColor: Colors.white,
        actions: [
          IconButton(
            icon: const Icon(Icons.picture_as_pdf),
            onPressed: () async {
              final pdfData = await generatePdf(context);
              await Printing.layoutPdf(onLayout: (format) async => pdfData);
            },
          ),
        ],
      ),
      body: ListView(
        padding: const EdgeInsets.all(16),
        children: groupedByDate.entries.map((entry) {
          final tanggal = entry.key;
          final layananMap = <String, List<dynamic>>{};
          for (var booking in entry.value) {
            final nama = booking['service']?['name'] ?? 'Tidak diketahui';
            layananMap.putIfAbsent(nama, () => []);
            layananMap[nama]!.add(booking);
          }

          int totalTanggal = 0;
          layananMap.forEach((_, list) {
            final price = list[0]['service']?['price'] ?? 0;
            totalTanggal += (price as int) * list.length;
          });

          return Card(
            margin: const EdgeInsets.only(bottom: 16),
            elevation: 3,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    formatTanggal(tanggal),
                    style: TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                      color: primaryColor,
                    ),
                  ),
                  const SizedBox(height: 8),
                  ...layananMap.entries.map((e) {
                    final nama = e.key;
                    final list = e.value;
                    final harga = list[0]['service']?['price'] ?? 0;
                    return Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Text('$nama (${list.length}x)'),
                        Text(formatRupiah((harga as int) * list.length)),
                      ],
                    );
                  }),
                  const SizedBox(height: 6),
                  Align(
                    alignment: Alignment.centerRight,
                    child: Text(
                      'Total: ${formatRupiah(totalTanggal)}',
                      style: const TextStyle(
                        fontWeight: FontWeight.bold,
                        fontSize: 14,
                      ),
                    ),
                  ),
                ],
              ),
            ),
          );
        }).toList(),
      ),
    );
  }
}