import 'package:flutter/material.dart';
import 'package:pdf/pdf.dart';
import 'package:printing/printing.dart';

class PdfGenerator {
  static Future<void> generatePdf(Invoice invoice, List<InvoiceItem> items) async {
    final pdf = pw.Document();

    pdf.addPage(
      pw.Page(
        build: (pw.Context context) => pw.Column(
          children: [
            pw.Text('請求書'),
            pw.SizedBox(height: 20),
            pw.Text('顧客名: ${invoice.customerId}'), // 後で顧客名に変更
            pw.Text('日付: ${invoice.date}'),
            pw.SizedBox(height: 20),
            pw.Table(
              border: pw.TableBorder.all(),
              children: [
                pw.TableRow(children: [
                  pw.Text('商品名'),
                  pw.Text('数量'),
                  pw.Text('単価'),
                  pw.Text('値引き'),
                  pw.Text('小計'),
                ]),
                for (var item in items)
                  pw.TableRow(children: [
                    pw.Text(item.productId.toString()), // 後で商品名に変更
                    pw.Text(item.quantity.toString()),
                    pw.Text(item.unitPrice.toStringAsFixed(2)),
                    pw.Text((item.discount * 100).toStringAsFixed(2) + '%'),
                    pw.Text((item.unitPrice * item.quantity - (item.unitPrice * item.quantity * item.discount)).toStringAsFixed(2)),
                  ]),
              ],
            ),
            pw.SizedBox(height: 20),
            pw.Row(
              mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
              children: [
                pw.Text('合計'),
                pw.Text(invoice.total.toStringAsFixed(2)),
              ],
            ),
            pw.Row(
              mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
              children: [
                pw.Text('税額'),
                pw.Text(invoice.tax.toStringAsFixed(2)),
              ],
            ),
            pw.Row(
              mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
              children: [
                pw.Text('値引き合計'),
                pw.Text(invoice.discountTotal.toStringAsFixed(2)),
              ],
            ),
          ],
        ),
      ),
    );

    await Printing.sharePdf(bytes: pdf.save(), filename: 'invoice.pdf');
  }
}