// 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-opening-frame')), findsNothing);
    expect(_opacity(tester), 0);
  });

  testWidgets('should_show_opening_frame_before_decode_is_ready', (
    tester,
  ) async {
    await _pumpSurface(
      tester,
      openingFrame: const ColoredBox(
        key: Key('fake-opening'),
        color: Colors.red,
      ),
    );

    expect(find.byKey(const Key('player-opening-frame')), findsOneWidget);
    expect(find.byKey(const Key('fake-opening')), findsOneWidget);
    expect(_opacity(tester), 0);
  });

  testWidgets('should_reveal_paused_frame_when_initialized', (tester) async {
    final controller = await _pumpSurface(tester);
    controller.value = const VideoPlayerValue(
      duration: Duration(minutes: 1),
      size: Size(1280, 720),
      position: Duration.zero,
      isInitialized: true,
      isPlaying: false,
    );
    await tester.pump();

    expect(_opacity(tester), 1);
    expect(find.byKey(const Key('player-opening-frame')), findsNothing);
  });

  testWidgets('should_show_cover_until_first_playback_frame', (
    tester,
  ) async {
    final controller = await _pumpSurface(
      tester,
      openingFrame: const ColoredBox(color: Colors.red),
      holdOpeningUntilFirstFrame: true,
    );
    expect(_opacity(tester), 0);

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

    expect(_opacity(tester), 0);
    expect(find.byKey(const Key('player-opening-frame')), findsOneWidget);

    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(find.byKey(const Key('player-opening-frame')), findsNothing);
    expect(
      tester
          .widget<AnimatedOpacity>(
            find.byKey(const Key('player-video-opacity')),
          )
          .duration,
      Duration.zero,
    );
  });

  testWidgets('should_skip_cover_when_prewarmed_frame_is_available', (
    tester,
  ) async {
    await _pumpSurface(
      tester,
      openingFrame: const ColoredBox(color: Colors.red),
      holdOpeningUntilFirstFrame: true,
      preparedFrameAvailable: true,
      value: const VideoPlayerValue(
        duration: Duration(minutes: 1),
        size: Size(1280, 720),
        position: Duration.zero,
        isInitialized: true,
        isPlaying: false,
      ),
    );

    expect(find.byKey(const Key('player-opening-frame')), findsNothing);
    expect(_opacity(tester), 1);
  });

  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(_opacity(tester), 0);
  });

  testWidgets('should_cover_new_video_only_while_handoff_is_held', (
    tester,
  ) async {
    final current = VideoPlayerController.networkUrl(
      Uri.parse('http://192.168.31.187:8081/files/720.m3u8'),
    );
    final previous = VideoPlayerController.networkUrl(
      Uri.parse('http://192.168.31.187:8081/files/360.m3u8'),
    );
    addTearDown(current.dispose);
    addTearDown(previous.dispose);
    const ready = VideoPlayerValue(
      duration: Duration(minutes: 1),
      size: Size(1280, 720),
      position: Duration(seconds: 3),
      isInitialized: true,
      isPlaying: true,
    );
    current.value = ready;
    previous.value = ready;

    Future<void> pump(VideoPlayerController? handoff) {
      return tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: PlayerVideoSurface(
              controller: current,
              handoff: handoff,
              videoUrl: current.dataSource,
              theater: false,
              openingFrame: const ColoredBox(color: Colors.red),
            ),
          ),
        ),
      );
    }

    await pump(previous);
    expect(find.byKey(const Key('player-video-handoff')), findsOneWidget);
    expect(find.byKey(const Key('player-opening-frame')), findsNothing);
    expect(_opacity(tester), 1);

    await pump(null);
    expect(find.byKey(const Key('player-video-handoff')), findsNothing);
    expect(find.byType(VideoPlayer), findsOneWidget);
  });
}

Future<VideoPlayerController> _pumpSurface(
  WidgetTester tester, {
  VideoPlayerValue? value,
  Widget? openingFrame,
  bool holdOpeningUntilFirstFrame = false,
  bool preparedFrameAvailable = false,
}) 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,
          openingFrame: openingFrame,
          holdOpeningUntilFirstFrame: holdOpeningUntilFirstFrame,
          preparedFrameAvailable: preparedFrameAvailable,
        ),
      ),
    ),
  );
  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;
}