// Author: fruit.com.cn

import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/services/sprite_thumbnail_asset_loader.dart';
import 'package:fruitshorts/core/widgets/remote_image.dart';
import 'package:fruitshorts/pages/player/widgets/player_opening_frame.dart';

const String _spriteVtt = '''
WEBVTT

00:00:00.000 --> 00:00:01.000
sprite_001.jpg#xywh=0,0,160,90
''';

void main() {
  test('should_return_no_opening_frame_when_thumbnails_url_is_empty', () {
    expect(playerOpeningFrame(null, posterUrl: '  '), isNull);
    expect(playerOpeningFrame('  '), isNull);
  });

  test('should_keep_opening_frame_when_only_poster_is_available', () {
    expect(
      playerOpeningFrame(null, posterUrl: 'https://cdn.test/poster.jpg'),
      isA<PlayerOpeningFrame>(),
    );
  });

  testWidgets('should_load_and_reuse_first_sprite_frame', (tester) async {
    final loader = _FakeSpriteLoader();
    final cache = OpeningFrameCache();
    addTearDown(cache.clear);

    final first = await cache.load(
      'https://cdn.test/thumbnails.vtt',
      loader: loader,
    );
    final second = await cache.load(
      'https://cdn.test/thumbnails.vtt',
      loader: loader,
    );

    expect(first, isNotNull);
    expect(second, same(first));
    expect(loader.vttCalls, 1);
    expect(loader.spriteCalls, ['sprite_001.jpg']);
  });

  testWidgets('should_render_decoded_opening_frame', (tester) async {
    final loader = _FakeSpriteLoader();
    final cache = OpeningFrameCache();
    addTearDown(cache.clear);

    await tester.pumpWidget(
      MaterialApp(
        home: PlayerOpeningFrame(
          thumbnailsUrl: 'https://cdn.test/thumbnails.vtt',
          loader: loader,
          cache: cache,
        ),
      ),
    );
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('player-opening-sprite')), findsOneWidget);
  });

  testWidgets('should_show_poster_while_sprite_is_loading', (tester) async {
    final cache = OpeningFrameCache();
    addTearDown(cache.clear);

    await tester.pumpWidget(
      MaterialApp(
        home: PlayerOpeningFrame(
          thumbnailsUrl: 'https://cdn.test/thumbnails.vtt',
          posterUrl: 'https://cdn.test/poster.jpg',
          loader: _FakeSpriteLoader(),
          cache: cache,
        ),
      ),
    );

    expect(find.byKey(const Key('player-opening-poster')), findsOneWidget);
  });

  testWidgets('should_use_surface_fit_without_extra_frame_constraint', (
    tester,
  ) async {
    await tester.pumpWidget(
      const MaterialApp(
        home: PlayerOpeningFrame(
          posterUrl: 'https://cdn.test/poster.jpg',
        ),
      ),
    );

    final poster = tester.widget<RemoteImage>(
      find.byKey(const Key('player-opening-poster')),
    );

    expect(poster.fit, BoxFit.cover);
    expect(find.byType(AspectRatio), findsNothing);
  });

  test('should_forward_video_fit_to_opening_frame', () {
    final frame = playerOpeningFrame(
      null,
      posterUrl: 'https://cdn.test/poster.jpg',
      fit: BoxFit.contain,
    );

    expect(frame, isA<PlayerOpeningFrame>());
    expect((frame! as PlayerOpeningFrame).fit, BoxFit.contain);
  });

  testWidgets('should_reuse_decoded_sprite_when_parent_rebuilds', (
    tester,
  ) async {
    final loader = _FakeSpriteLoader();
    final cache = OpeningFrameCache();
    addTearDown(cache.clear);
    Widget build() => MaterialApp(
      home: PlayerOpeningFrame(
        thumbnailsUrl: 'https://cdn.test/thumbnails.vtt',
        posterUrl: 'https://cdn.test/poster.jpg',
        loader: loader,
        cache: cache,
      ),
    );

    await tester.pumpWidget(build());
    await tester.pumpAndSettle();
    expect(loader.vttCalls, 1);
    expect(loader.spriteCalls, hasLength(1));

    await tester.pumpWidget(build());
    await tester.pumpAndSettle();

    expect(loader.vttCalls, 1);
    expect(loader.spriteCalls, hasLength(1));
    expect(find.byKey(const Key('player-opening-sprite')), findsOneWidget);
  });
}

class _FakeSpriteLoader implements SpriteThumbnailAssetLoader {
  int vttCalls = 0;
  final List<String> spriteCalls = [];

  @override
  Future<String?> loadVtt(Uri uri) async {
    vttCalls++;
    return _spriteVtt;
  }

  @override
  Future<SpriteThumbnailDecodedImage?> loadSprite(Uri uri) async {
    spriteCalls.add(uri.pathSegments.last);
    return SpriteThumbnailDecodedImage(
      image: await _createImage(320, 180),
      originalWidth: 320,
      originalHeight: 180,
    );
  }
}

Future<ui.Image> _createImage(int width, int height) async {
  final recorder = ui.PictureRecorder();
  final canvas = Canvas(recorder);
  canvas.drawRect(
    Rect.fromLTWH(0, 0, width.toDouble(), height.toDouble()),
    Paint()..color = Colors.blue,
  );
  final picture = recorder.endRecording();
  final image = await picture.toImage(width, height);
  picture.dispose();
  return image;
}