import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
import 'package:jj_mkvmaker/services/model_store.dart';
import 'package:jj_mkvmaker/services/platform_services.dart';
import 'package:jj_mkvmaker/ui/ai_subtitle_models.dart';
import 'package:path/path.dart' as p;

/// 260: 받은 AI 자막 모델 (Whisper · NLLB) 을 앱 안에서 크기 보고 지우기
void main() {
  late Directory tmp;
  late ModelStore models;
  setUp(() async {
    tmp = Directory.systemTemp.createTempSync('jj_m260_');
    models = ModelStore(tmp.path);
    // whisper base 만 받음 (small 은 받다 만 조각), NLLB 는 Android 가 바꿔 둔 파일까지
    File(await models.pathOf(whisperModels[0]))
      ..createSync(recursive: true)
      ..writeAsBytesSync(List.filled(3000, 1));
    File('${await models.pathOf(whisperModels[1])}.part').writeAsBytesSync(List.filled(500, 1));
    final nllb = await models.folderOf(nllbModel);
    for (final n in ['tokenizer.json', 'encoder_model_quantized_jj2.onnx', 'encoder_model_quantized_jj2.onnx.data',
      'decoder_model_merged_quantized_jj2.onnx', 'decoder_model_merged_quantized_jj2.onnx.data']) {
      File(p.join(nllb, n))
        ..createSync(recursive: true)
        ..writeAsBytesSync(List.filled(1000, 1));
    }
  });
  tearDown(() => tmp.deleteSync(recursive: true));

  test('크기 · 지우기: 같은 폴더의 다른 Whisper 는 남기고, NLLB 는 폴더째', () async {
    expect(await models.usedBytes(whisperModels[0]), 3000);
    expect(await models.usedBytes(whisperModels[1]), 500, reason: '받다 만 조각도 셈');
    expect(await models.usedBytes(nllbModel), 5000);
    await models.remove(whisperModels[0]);
    expect(File(await models.pathOf(whisperModels[0])).existsSync(), isFalse);
    expect(File('${await models.pathOf(whisperModels[1])}.part').existsSync(), isTrue, reason: '다른 모델 것은 남김');
    await models.remove(nllbModel);
    expect(Directory(await models.folderOf(nllbModel)).existsSync(), isFalse);
    expect(await models.usedBytes(nllbModel), 0);
  });

  testWidgets('환경 설정 목록: 받은 것은 크기 · [지우기] → 확인 뒤 지움', (tester) async {
    final c = AppController(PlatformServices(
        mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService(), models: models));
    await tester.runAsync(() async {
      await tester.pumpWidget(MaterialApp(home: Scaffold(body: ListView(children: [AiSubtitleModels(c: c)]))));
      await Future<void>.delayed(const Duration(milliseconds: 300));
    });
    await tester.pump();
    expect(find.text(whisperModels[0].label), findsOneWidget);
    expect(find.textContaining('받음'), findsNWidgets(2));
    expect(find.textContaining('받다 만 조각'), findsOneWidget);
    expect(find.text('지우기'), findsNWidgets(3));
    await tester.tap(find.text('지우기').last);
    await tester.pumpAndSettle();
    await tester.tap(find.widgetWithText(FilledButton, '지우기'));
    await tester.pumpAndSettle();
    // 지우기는 실제 파일을 하나씩 지운다 - 다 지워질 때까지 실제 시간을 조금씩 준다
    final nllbDir = Directory((await tester.runAsync(() => models.folderOf(nllbModel)))!);
    for (var i = 0; i < 50 && find.textContaining('받지 않음').evaluate().isEmpty; i++) {
      await tester.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 20)));
      await tester.pump();
    }
    expect(nllbDir.existsSync(), isFalse);
    expect(find.text('지우기'), findsNWidgets(2));
    expect(find.textContaining('받지 않음'), findsOneWidget);
  });
}