import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:image/image.dart' as img;
import 'package:tane/ui/photo_crop.dart';

void main() {
  // A small but real PNG the cropper can decode.
  final bytes = Uint8List.fromList(
    img.encodePng(img.Image(width: 32, height: 32)),
  );

  testWidgets('cropToSquare shows a cancel/confirm UI and cancel returns null', (
    tester,
  ) async {
    Uint8List? result;
    var returned = false;
    await tester.pumpWidget(MaterialApp(
      home: Builder(
        builder: (context) => Scaffold(
          body: Center(
            child: ElevatedButton(
              onPressed: () async {
                result = await cropToSquare(context, bytes);
                returned = true;
              },
              child: const Text('open'),
            ),
          ),
        ),
      ),
    ));

    await tester.tap(find.text('open'));
    await tester.pump(); // push the crop route
    await tester.pump(const Duration(milliseconds: 100));

    expect(find.byKey(const Key('crop.confirm')), findsOneWidget);
    expect(find.byKey(const Key('crop.cancel')), findsOneWidget);

    await tester.tap(find.byKey(const Key('crop.cancel')));
    await tester.pump(); // pop the crop route

    expect(returned, isTrue);
    expect(result, isNull); // cancelling yields no image
  });
}