import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fancake/core/ui/adaptive_planet_effects.dart';
import 'package:fancake/core/ui/planet_25d.dart';
import 'package:fancake/core/ui/planet_evolution.dart';

FrameTiming frame(int cost) => FrameTiming(
  vsyncStart: 0,
  buildStart: 0,
  buildFinish: cost,
  rasterStart: cost,
  rasterFinish: cost * 2,
  rasterFinishWallTime: cost * 2,
);

void main() {
  testWidgets('일시 지연은 무시하고 지속 지연에서 단계적으로 축소하며 진화 결과는 유지한다', (tester) async {
    Future<void> show(int stage) => tester.pumpWidget(
      MaterialApp(
        home: AdaptivePlanetEffects(
          child: Center(
            child: Planet25D(
              image: 'assets/figma/planet-home.png',
              size: 200,
              stage: stage,
            ),
          ),
        ),
      ),
    );
    int level() => tester
        .widget<PlanetEffectsQuality>(find.byType(PlanetEffectsQuality))
        .level;
    Future<void> timings(int count, int cost) async {
      tester.binding.platformDispatcher.onReportTimings!(
        List.generate(count, (_) => frame(cost)),
      );
      await tester.pump();
    }

    await show(3);
    await timings(60, 40000); // 시작 시 리소스 로딩은 판정 제외.
    expect(level(), 0);
    await timings(20, 40000);
    await timings(100, 2000);
    expect(level(), 0, reason: '짧은 지연만으로 품질을 떨어뜨리지 않는다');
    await timings(120, 40000);
    expect(level(), 1);
    await timings(120, 40000);
    expect(level(), 2);
    expect(
      tester.widget<PlanetEvolution>(find.byType(PlanetEvolution)).lowEffects,
      true,
    );
    await show(4);
    expect(find.text('이상 반응'), findsOneWidget);
    await tester.pump(const Duration(milliseconds: 1800));
    expect(find.text('Stage 4 · 동행'), findsOneWidget);
    await timings(240, 2000);
    expect(level(), 2, reason: '세션 중 품질이 반복 왕복하지 않는다');
    await tester.pumpWidget(const SizedBox());
    expect(tester.takeException(), isNull);
  });
}