import 'dart:async';
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:image/image.dart' as img;
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/ai_upscale/upscale_compare.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 중에서 멈춰 있는 받기 (네트워크 없음)
class _Backend implements DownloadBackend {
  @override
  DownloadKind get kind => DownloadKind.video;
  @override
  Future<(String, List<PlaylistEntry>)?> expandPlaylist(String url) async => null;
  @override
  Future<void> start(DownloadTask t, void Function() changed) async {
    t.state = DownloadState.downloading;
    changed();
  }

  @override
  Future<void> pause(DownloadTask t) async {}
  @override
  Future<void> cancel(DownloadTask t) async {}
  @override
  Future<void> shutdown() async {}
}

/// a22832d (after_1020) 에서 옮김 - 관리자 지시 (10/21, F11 다음): "제목 + 단추 + ✕" 모양의 다른 창도 360 에서 - ① 다운로드 종료 확인 창 ② AI 해상도 비교 화면.
/// 넘치지 않고 ✕ (닫기 · 종료) 와 [저장] 이 화면 안. ko · ja × 360 · 412
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  final out = Platform.environment['JJ_SHOT_DIR'] ?? '';

  for (final lang in ['ko', 'ja']) {
    for (final (w, h) in [(360, 780), (412, 900)]) {
      testWidgets('제목 줄 $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_hdr360_');
        final shotKey = GlobalKey();
        final navKey = GlobalKey<NavigatorState>();
        await t.pumpWidget(MaterialApp(
          theme: buildTheme(),
          debugShowCheckedModeBanner: false,
          navigatorKey: navKey,
          builder: (context, child) => RepaintBoundary(key: shotKey, child: child),
          home: const Scaffold(body: SizedBox.expand()),
        ));
        Future<void> settle([int n = 8]) async {
          for (var i = 0; i < n; i++) {
            await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 50)));
            await t.pump();
          }
        }

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

        void inside(Finder f, String what) {
          final r = t.getRect(f);
          expect(r.left >= -0.5 && r.right <= w + 0.5, isTrue, reason: '$what 화면 안 ($r)');
        }

        // ① 다운로드 종료 확인 창 (받는 중 2개)
        final s = AppSettings(); s.download.root = tmp.path; // 나눈 설정 (download.root)
        final d = DownloadManager(backends: [_Backend()], settings: () => s, readClipboard: () async => null);
        addTearDown(d.dispose);
        d.addPage('https://cdn.example.com/a')!.title = 'アップロードされた とても長い 動画のタイトル - 第1話 高画質版';
        d.addPage('https://cdn.example.com/b')!.title = 'Test video 2';
        await settle();
        unawaited(confirmExit(navKey.currentContext!, d));
        await settle();
        inside(find.byTooltip(tr('종료')), '✕ (종료)');
        await shot('1_exit');
        navKey.currentState!.popUntil((r) => r.isFirst);
        await settle();

        // ② AI 해상도 비교 화면 - 긴 그림 이름
        final a = p.join(tmp.path, 'a.png');
        final b = p.join(tmp.path, 'b.png');
        File(a).writeAsBytesSync(img.encodePng(img.Image(width: 40, height: 30)));
        File(b).writeAsBytesSync(img.encodePng(img.Image(width: 80, height: 60)));
        unawaited(navKey.currentState!.push<bool>(MaterialPageRoute(
            builder: (_) => UpscaleCompareView(original: a, upscaled: b, title: '아주 긴 이름의 만화 스캔 - 제1권 012쪽_x2.png'))));
        await settle(12);
        inside(find.byTooltip(tr('닫기')), '✕ (닫기)');
        inside(find.text(tr('저장')), '[저장]');
        inside(find.text(tr('올린 것')), '[올린 것]');
        expect(t.getRect(find.text('아주 긴 이름의 만화 스캔 - 제1권 012쪽_x2.png')).width > 40, isTrue, reason: '제목이 보임');
        await shot('2_compare');
      });
    }
  }
}