// Author: fruit.com.cn
// 职责：检查观看全集按钮的玻璃表面确实被绘制出来。
import 'dart:typed_data';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/core/theme/app_colors.dart';
import 'package:fruitshorts/l10n/app_localizations.dart';
import 'package:fruitshorts/pages/player/widgets/home_feed_recommend_panel.dart';

const _boundaryKey = Key('watch-surface-boundary');
const _width = 280.0;
const _sampleInset = 16;
const _sampleY = 4;
const _rgbaChannels = 4;
const _surfaceTolerance = 0.01;
const _drama = Drama(
  id: 'surface',
  title: 'Surface',
  synopsis: '',
  posterUrl: '',
);

Future<void> _pumpButton(WidgetTester tester) => tester.pumpWidget(
  MaterialApp(
    localizationsDelegates: AppLocalizations.localizationsDelegates,
    supportedLocales: AppLocalizations.supportedLocales,
    home: Scaffold(
      backgroundColor: Colors.black,
      body: Center(
        child: RepaintBoundary(
          key: _boundaryKey,
          child: SizedBox(
            width: _width,
            child: ColoredBox(
              color: Colors.black,
              child: HomeFeedWatchAllBar(drama: _drama, onTap: () {}),
            ),
          ),
        ),
      ),
    ),
  ),
);

Color _sample(ByteData bytes, int width, int x) {
  final offset = (_sampleY * width + x) * _rgbaChannels;
  return Color.fromARGB(
    bytes.getUint8(offset + 3),
    bytes.getUint8(offset),
    bytes.getUint8(offset + 1),
    bytes.getUint8(offset + 2),
  );
}

void main() {
  testWidgets('should_paint_reference_dark_surface_when_watching_all', (
    tester,
  ) async {
    await _pumpButton(tester);
    final boundary = tester.renderObject<RenderRepaintBoundary>(
      find.byKey(_boundaryKey),
    );
    await tester.runAsync(() async {
      final image = await boundary.toImage();
      final bytes = (await image.toByteData(
        format: ui.ImageByteFormat.rawRgba,
      ))!;
      final left = _sample(bytes, image.width, _sampleInset);
      final middle = _sample(bytes, image.width, image.width ~/ 2);
      final right = _sample(bytes, image.width, image.width - _sampleInset);
      image.dispose();
      for (final sample in [left, middle, right]) {
        expect(sample.a, 1);
        expect(
          sample.r,
          closeTo(AppColors.watchAllSurface.a, _surfaceTolerance),
        );
        expect(
          sample.g,
          closeTo(AppColors.watchAllSurface.a, _surfaceTolerance),
        );
        expect(
          sample.b,
          closeTo(AppColors.watchAllSurface.a, _surfaceTolerance),
        );
      }
    });
  });
}