import 'dart:convert';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:cashumit/models/receipt_item.dart';
import 'package:cashumit/widgets/invoice_image_widget.dart';

void main() {
  final tinyPng = base64Decode(
    'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==',
  );

  InvoiceData buildData({
    String disclaimer = '',
    String thankYouText = '',
    String pantunText = '',
    double tipAmount = 0.0,
    double? total,
    Uint8List? qrisBytes,
  }) {
    return InvoiceData(
      invoiceNumber: 'INV24-1',
      storeName: 'TOKO SEMBAKO MURAH',
      storeAddress: 'Jl. Merdeka No. 123',
      adminName: 'Budi Santoso',
      adminPhone: '08123456789',
      customerName: 'NISFIA',
      date: DateTime(2026, 10, 7, 14, 30),
      items: [
        ReceiptItem(
          description: 'AKRILIK PUTIH SUSU 3MM',
          quantity: 2,
          price: 22000,
        ),
      ],
      total: total ?? (44000 + tipAmount),
      tipAmount: tipAmount,
      qrisBytes: qrisBytes,
      disclaimer: disclaimer,
      thankYouText: thankYouText,
      pantunText: pantunText,
    );
  }

  Future<void> pumpInvoice(WidgetTester tester, InvoiceData data) async {
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: SingleChildScrollView(
            child: InvoiceImageWidget(data: data),
          ),
        ),
      ),
    );
  }

  testWidgets('header menampilkan info toko', (tester) async {
    await pumpInvoice(tester, buildData());

    expect(find.text('INVOICE'), findsOneWidget);
    expect(find.text('TOKO SEMBAKO MURAH'), findsNWidgets(2));
    expect(find.text('Jl. Merdeka No. 123'), findsOneWidget);
    expect(find.text('Telp: 08123456789'), findsOneWidget);
    expect(find.text('Admin: Budi Santoso'), findsOneWidget);
  });

  testWidgets('footer menampilkan disclaimer, terima kasih, dan pantun',
      (tester) async {
    await pumpInvoice(
      tester,
      buildData(
        disclaimer: 'Barang tidak dapat dikembalikan.',
        thankYouText: '*** TERIMA KASIH ***',
        pantunText: 'Baris satu,\\nBaris dua,\nBaris tiga',
      ),
    );

    expect(find.text('*** TERIMA KASIH ***'), findsOneWidget);
    expect(find.text('Baris satu,'), findsOneWidget);
    expect(find.text('Baris dua,'), findsOneWidget);
    expect(find.text('Baris tiga'), findsOneWidget);
    expect(find.text('Barang tidak dapat dikembalikan.'), findsOneWidget);
  });

  testWidgets('footer tidak menampilkan teks opsional yang kosong',
      (tester) async {
    await pumpInvoice(tester, buildData());

    expect(find.text('*** TERIMA KASIH ***'), findsNothing);
    expect(find.text('Barang tidak dapat dikembalikan.'), findsNothing);
    expect(find.text('Baris satu,'), findsNothing);
  });

  testWidgets('tip dijumlahkan ke total dan jumlah yang harus dibayar',
      (tester) async {
    final data = buildData(tipAmount: 10000);
    await pumpInvoice(tester, data);

    expect(find.text('Tip'), findsOneWidget);
    expect(find.text('Rp 10.000'), findsOneWidget);
    expect(find.text('Rp 54.000'), findsNWidgets(2));
  });

  testWidgets('tip tidak ditampilkan bila nominalnya nol', (tester) async {
    await pumpInvoice(tester, buildData());

    expect(find.text('Tip'), findsNothing);
  });

  testWidgets('gambar QRIS menggantikan instruksi pembayaran', (tester) async {
    await pumpInvoice(tester, buildData(qrisBytes: tinyPng));

    expect(find.text('Pembayaran via QRIS'), findsOneWidget);
    expect(find.text('Instruksi Pembayaran'), findsNothing);
    expect(find.byType(Image), findsWidgets);
  });

  testWidgets('QRIS tidak tampil bila belum diatur', (tester) async {
    await pumpInvoice(tester, buildData());

    expect(find.text('Pembayaran via QRIS'), findsNothing);
    expect(find.text('Instruksi Pembayaran'), findsNothing);
  });
}