import 'dart:io';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:jj_mkvmaker/app/download_manager.dart';
import 'package:jj_mkvmaker/app/i18n_controller.dart';
import 'package:jj_mkvmaker/app/settings.dart';
import 'package:jj_mkvmaker/core/download_detect.dart';
import 'package:jj_mkvmaker/l10n/tr.dart';
import 'package:jj_mkvmaker/services/downloader.dart';
import 'package:jj_mkvmaker/ui/downloads_page.dart';
import 'package:jj_mkvmaker/ui/theme.dart';
import 'package:path/path.dart' as p;

import 'support/temp_dir.dart';

/// 받는 척만 하는 백엔드 (네트워크 없음)
class _Backend implements DownloadBackend {
  @override
  final DownloadKind kind;
  _Backend(this.kind);
  @override
  Future<(String, List<PlaylistEntry>)?> expandPlaylist(String url) async => null;
  @override
  Future<void> start(DownloadTask t, void Function() changed) async {
    t
      ..state = DownloadState.downloading
      ..progress = 0.4
      ..speed = '1.2MB/s'
      ..title = kind == DownloadKind.video ? 'Test video' : 'ubuntu-24.04.1-desktop-amd64.iso';
    changed();
  }

  @override
  Future<void> pause(DownloadTask t) async => t.state = DownloadState.paused;
  @override
  Future<void> cancel(DownloadTask t) async => t.state = DownloadState.cancelled;
  @override
  Future<void> shutdown() async {}
}

/// 185 (관리자 지시 10/21): [다운로드 취소] 를 누르면 묻는 창 - [계속 받기] 면 그대로 받는다. ko · en · ja × 412 · 960
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  final out = Platform.environment['JJ_SHOT_DIR'] ?? '';

  for (final lang in ['ko', 'en', 'ja']) {
    for (final (w, h) in [(412, 900), (960, 600)]) {
      testWidgets('185 계속 받기 $lang ${w}x$h', (t) async {
        t.view.physicalSize = Size(w.toDouble(), h.toDouble());
        t.view.devicePixelRatio = 1;
        addTearDown(t.view.reset);
        await t.runAsync(() => i18n.apply(lang, save: false));
        addTearDown(() => i18n.apply('ko', save: false));
        final tmp = testTempDir('jj_dlcancel_');
        final d = DownloadManager(
          backends: [_Backend(DownloadKind.video), _Backend(DownloadKind.torrent)],
          settings: () => AppSettings()..downloadRoot = tmp.path,
          readClipboard: () async => null,
        );
        final shotKey = GlobalKey();
        await t.pumpWidget(RepaintBoundary(
          key: shotKey,
          child: MaterialApp(theme: buildTheme(), debugShowCheckedModeBanner: false, home: DownloadsPage(d: d)),
        ));
        Future<void> settle([int n = 8]) async {
          for (var i = 0; i < n; i++) {
            await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 60)));
            await t.pump();
          }
        }

        Future<void> shot(String name) async {
          await settle(3);
          expect(t.takeException(), isNull, reason: '$name 넘침');
          if (out.isEmpty) return;
          final b = shotKey.currentContext!.findRenderObject()! as RenderRepaintBoundary;
          final img = await t.runAsync(() => b.toImage());
          final bytes = await t.runAsync(() => img!.toByteData(format: ui.ImageByteFormat.png));
          Directory(out).createSync(recursive: true);
          File(p.join(out, 'dlcancel_${name}_${lang}_$w.png')).writeAsBytesSync(bytes!.buffer.asUint8List());
        }

        d.add('https://youtu.be/AAA111');
        d.add('magnet:?xt=urn:btih:0123456789abcdef0123456789abcdef01234567');
        await settle();
        await t.tap(find.text(tr('전체 선택')));
        await settle();
        await t.tap(find.text(tr('다운로드 취소')));
        await settle();
        expect(find.text(trf('선택한 다운로드 {0}개를 취소할까요? 잠깐 멈추려면 [일시정지] 를 쓰세요.', [2])), findsOneWidget);
        await shot('1_ask');
        await t.tap(find.text(tr('계속 받기')));
        await settle();
        expect(d.tasks.every((x) => x.state == DownloadState.downloading), isTrue, reason: '[계속 받기] 면 그대로');
        await shot('2_kept');
        expect(p.basename(tmp.path), startsWith('jj_dlcancel_'));
      });
    }
  }
}