// Author: fruit.com.cn

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:video_player/video_player.dart';

import 'package:fruitshorts/pages/player/widgets/player_video_surface.dart';

void main() {
  testWidgets('should_keep_fallback_visible_before_video_is_ready', (
    tester,
  ) async {
    await _pumpSurface(tester);

    expect(_fallbackColor(tester), Colors.black);
    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
    expect(find.byKey(const Key('player-fallback-scrim')), findsNothing);
    expect(_opacity(tester), 0);
    expect(find.byKey(const Key('player-debug-video')), findsNothing);
  });

  testWidgets('should_fade_video_in_within_200ms_after_first_frame', (
    tester,
  ) async {
    final controller = await _pumpSurface(tester);
    expect(_opacity(tester), 0);

    controller.value = const VideoPlayerValue(
      duration: Duration(minutes: 1),
      size: Size(1280, 720),
      position: Duration(milliseconds: 1),
      isInitialized: true,
      isPlaying: true,
    );
    await tester.pump();

    expect(_opacity(tester), 1);
    expect(
      tester
          .widget<AnimatedOpacity>(
            find.byKey(const Key('player-video-opacity')),
          )
          .duration,
      const Duration(milliseconds: 200),
    );
    await tester.pump(const Duration(milliseconds: 100));
    final halfway = _fadeValue(tester);
    expect(halfway, greaterThan(0));
    expect(halfway, lessThan(1));
    await tester.pump(const Duration(milliseconds: 100));
    expect(_fadeValue(tester), 1);
    expect(_fallbackColor(tester), Colors.black);
    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
    expect(find.byKey(const Key('player-debug-video')), findsNothing);
  });

  testWidgets('should_show_video_error_above_retained_fallback', (
    tester,
  ) async {
    await _pumpSurface(
      tester,
      value: const VideoPlayerValue.erroneous('No route to host'),
    );

    expect(find.byKey(const Key('player-video-error')), findsOneWidget);
    expect(find.text('No route to host'), findsOneWidget);
    expect(_fallbackColor(tester), Colors.black);
    expect(find.byKey(const Key('player-fallback-cover')), findsNothing);
    expect(_opacity(tester), 0);
    expect(find.byKey(const Key('player-debug-video')), findsNothing);
  });
}

Future<VideoPlayerController> _pumpSurface(
  WidgetTester tester, {
  VideoPlayerValue? value,
}) async {
  final controller = VideoPlayerController.networkUrl(
    Uri.parse('http://192.168.31.187:8081/files/video.mp4'),
  );
  addTearDown(controller.dispose);
  if (value != null) controller.value = value;
  await tester.pumpWidget(
    MaterialApp(
      home: Scaffold(
        body: PlayerVideoSurface(
          controller: controller,
          videoUrl: controller.dataSource,
          theater: false,
          onTap: () {},
        ),
      ),
    ),
  );
  await tester.pump();
  return controller;
}

Color _fallbackColor(WidgetTester tester) {
  return tester
      .widget<ColoredBox>(find.byKey(const Key('player-fallback-background')))
      .color;
}

double _opacity(WidgetTester tester) {
  return tester
      .widget<AnimatedOpacity>(find.byKey(const Key('player-video-opacity')))
      .opacity;
}

double _fadeValue(WidgetTester tester) {
  final fade = find.descendant(
    of: find.byKey(const Key('player-video-opacity')),
    matching: find.byType(FadeTransition),
  );
  return tester.widget<FadeTransition>(fade).opacity.value;
}