// Author: fruit.com.cn

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/pages/player/widgets/seek_progress_bar.dart';
import 'package:video_player/video_player.dart';

void main() {
  testWidgets('tapping the progress bar does not hide the overlay', (
    tester,
  ) async {
    final harness = await _pumpHarness(tester);

    await tester.tap(find.byType(Slider));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('scrub-overlay')), findsOneWidget);
    expect(harness.scrubStarts, 0);
    expect(harness.seeks, 0);
    expect(_sliderTheme(tester).trackHeight, 2);
  });

  testWidgets('horizontal drag hides the overlay and thickens the track', (
    tester,
  ) async {
    final harness = await _pumpHarness(tester);
    final slider = find.byType(Slider);
    final gesture = await tester.startGesture(tester.getCenter(slider));

    await gesture.moveBy(const Offset(24, 0));
    await tester.pump();
    expect(find.byKey(const Key('scrub-overlay')), findsNothing);
    expect(harness.scrubStarts, 1);
    expect(_sliderTheme(tester).trackHeight, 6);
    expect(
      (_sliderTheme(tester).thumbShape! as RoundSliderThumbShape)
          .enabledThumbRadius,
      8,
    );

    await gesture.moveBy(const Offset(72, 0));
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();
  });

  testWidgets('releasing restores the overlay and idle track height', (
    tester,
  ) async {
    final harness = await _pumpHarness(tester);
    final gesture = await tester.startGesture(
      tester.getCenter(find.byType(Slider)),
    );
    await gesture.moveBy(const Offset(32, 0));
    await tester.pump();
    await gesture.moveBy(const Offset(64, 0));
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('scrub-overlay')), findsOneWidget);
    expect(harness.scrubEnds, 1);
    expect(harness.seeks, 1);
    expect(_sliderTheme(tester).trackHeight, 2);
    expect(
      (_sliderTheme(tester).thumbShape! as RoundSliderThumbShape)
          .enabledThumbRadius,
      6,
    );
  });
}

Future<_HarnessState> _pumpHarness(WidgetTester tester) async {
  final controller = ValueNotifier<VideoPlayerValue>(
    const VideoPlayerValue(
      duration: Duration(minutes: 2),
      position: Duration(seconds: 20),
      isInitialized: true,
    ),
  );
  addTearDown(controller.dispose);
  final key = GlobalKey<_HarnessState>();
  await tester.pumpWidget(
    MaterialApp(
      home: Scaffold(
        body: _Harness(key: key, controller: controller),
      ),
    ),
  );
  await tester.pumpAndSettle();
  return key.currentState!;
}

SliderThemeData _sliderTheme(WidgetTester tester) {
  return tester
      .widget<SliderTheme>(
        find
            .ancestor(
              of: find.byType(Slider),
              matching: find.byType(SliderTheme),
            )
            .first,
      )
      .data;
}

class _Harness extends StatefulWidget {
  const _Harness({super.key, required this.controller});

  final ValueNotifier<VideoPlayerValue> controller;

  @override
  State<_Harness> createState() => _HarnessState();
}

class _HarnessState extends State<_Harness> {
  bool visible = true;
  int scrubStarts = 0;
  int scrubEnds = 0;
  int seeks = 0;

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        if (visible) const Text('Overlay', key: Key('scrub-overlay')),
        SizedBox(
          width: 320,
          height: 80,
          child: SeekProgressBar(
            valueListenable: widget.controller,
            semanticsLabel: 'Progress',
            onScrubStart: () => setState(() {
              visible = false;
              scrubStarts++;
            }),
            onScrubEnd: () => setState(() {
              visible = true;
              scrubEnds++;
            }),
            onSeek: (_) async {
              seeks++;
            },
          ),
        ),
      ],
    );
  }
}