@Tags(['design'])
library;

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

import 'package:fancake/core/data/repositories.dart';
import 'package:fancake/core/router/app_router.dart';
import 'package:fancake/core/theme/app_theme.dart';
import 'package:fancake/features/auth/auth_repository.dart';
import 'package:fancake/features/auth/login_screen.dart';
import 'package:fancake/features/auth/signup_screens.dart';
import 'package:fancake/features/inside/inside_data.dart';
import 'package:fancake/features/inside/inside_detail_screen.dart';
import 'package:fancake/features/inside/inside_search_screen.dart';
import 'package:fancake/features/inside/inside_write_screen.dart';
import 'package:fancake/features/notification/notification_screen.dart';
import 'package:fancake/features/planet/moderation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';

/// 디자인 일치 2단계 그룹 E — INSIDE(F9) · 로그인(F10) · 알림(F0-02).
///
/// 러너는 `design_match_test.dart` 와 같고, 화면 목록과 표본만 이 그룹 것이다.
/// 실행: `DESIGN_MATCH_OUT=<폴더> fvm flutter test --tags design test/design_match/e_test.dart`

/// Figma 프레임 폭. 높이는 화면마다 Figma 프레임 높이를 따른다.
const _width = 375.0;

/// iPhone X 계열 Figma 프레임의 상태 표시줄(48) · 홈 인디케이터(34).
const _padding = FakeViewPadding(top: 48 * 2, bottom: 34 * 2);

typedef Build = Future<Widget> Function(Repositories r);
typedef After = Future<void> Function(WidgetTester t);

class Shot {
  const Shot(this.id, {this.build, this.tab, this.h = 812, this.after});
  final String id;

  /// 탭 밖 화면. [tab] 과 둘 중 하나만 준다.
  final Build? build;

  /// 탭 루트 화면 — 실제 셸(하단 탭 포함)을 라우터로 띄운다.
  final String? tab;
  final double h;

  /// 시트·다이얼로그·탭 전환처럼 화면을 띄운 뒤 한 번 더 조작해야 하는 상태.
  final After? after;
}

Future<void> _tap(WidgetTester t, String text) async {
  await t.tap(find.text(text).first, warnIfMissed: false);
  await _settle(t);
}

/// 표본 저장소는 Future.value · 짧은 delay 만 쓴다. 무한 애니메이션이 있어 pumpAndSettle 은 쓰지 않는다.
Future<void> _settle(WidgetTester t) async {
  for (var i = 0; i < 6; i++) {
    await t.pump(const Duration(milliseconds: 300));
  }
}

Future<void> _overlay(
  WidgetTester t,
  void Function(BuildContext c) open,
) async {
  open(t.element(find.byType(Scaffold).first));
  await _settle(t);
}

/// 시안 알림(229:11265) 표본. 날짜 머리글이 「오늘 · 어제 · 과거」로 갈리도록 지금 기준으로 잡는다.
List<AppNotification> _notifications() {
  final now = DateTime.now();
  DateTime at(int daysAgo, int h, int m) =>
      DateTime(now.year, now.month, now.day - daysAgo, h, m);
  return [
    AppNotification(
      id: '1',
      kind: NotificationKind.comment,
      title: '내 INSIDE에 새로운 댓글이 달렸어요.',
      at: at(0, 10, 40),
      source: 'INSIDE',
    ),
    AppNotification(
      id: '2',
      kind: NotificationKind.comment,
      title: '내 캠페인에 새로운 댓글이 달렸어요.',
      at: at(0, 10, 40),
      source: 'CAMPAIGN',
    ),
    AppNotification(
      id: '3',
      kind: NotificationKind.like,
      title: '내 INSIDE에 좋아요가 추가됐어요.',
      at: at(0, 9, 28),
      source: 'INSIDE',
    ),
    AppNotification(
      id: '4',
      kind: NotificationKind.eclipse,
      title: '내 행성의 이클립스를 방어했어요.',
      at: at(1, 10, 40),
      source: 'BTS',
    ),
    AppNotification(
      id: '5',
      kind: NotificationKind.eclipse,
      title: '내 행성의 이클립스가 발생했어요.',
      at: at(1, 10, 40),
      source: 'BTS',
    ),
    AppNotification(
      id: '6',
      kind: NotificationKind.itemUsed,
      title: '팜하니짱님의 고귀한 기여로 영웅의 선물이 발동되었습니다!',
      at: at(2, 16, 27),
      source: '아이템',
    ),
    AppNotification(
      id: '7',
      kind: NotificationKind.quest,
      title: '[만보기] 퀘스트를 완료했어요!',
      at: at(2, 13, 27),
      source: '퀘스트',
    ),
  ];
}

Future<InsideQuestion> _question(Repositories r, String id) async =>
    (await r.inside.load()).questions.firstWhere((q) => q.id == id);

final shots = <Shot>[
  Shot(
    'F0-02',
    build: (r) async => NotificationScreen(
      repository: SampleNotificationRepository(items: _notifications()),
    ),
  ),
  // F9 INSIDE
  Shot('F9-01', build: (r) async => InsideSearchScreen(repository: r.inside)),
  Shot(
    'F9-02',
    build: (r) async => InsideSearchScreen(repository: r.inside),
    after: (t) async {
      await t.enterText(find.byType(TextField), 'BTS');
      await t.testTextInput.receiveAction(TextInputAction.search);
      await _settle(t);
      await _tap(t, 'POP순');
      // 커서 깜빡임을 없앤다.
      FocusManager.instance.primaryFocus?.unfocus();
      await _settle(t);
    },
  ),
  Shot(
    'F9-03',
    h: 1360,
    build: (r) async => InsideDetailScreen(
      question: await _question(r, 'q-1'),
      answers: sampleInsideAnswers,
    ),
  ),
  Shot(
    'F9-04',
    build: (r) async => const ReportScreen(
      target: ModerationTarget(
        authorName: 'BTS_Hong',
        title: '공방 신청 꿀팁 공유합니다.',
      ),
    ),
  ),
  Shot(
    'F9-05',
    build: (r) async => InsideDetailScreen(
      question: await _question(r, 'q-1'),
      answers: sampleInsideAnswers,
    ),
    after: (t) => _overlay(t, (c) => confirmBlock(c, '다이브짱')),
  ),
  Shot('F9-06', build: (r) async => const InsideWriteScreen(myPop: 12500)),
  Shot('F9-07', tab: '/inside', after: (t) => _tap(t, 'POP순')),
  Shot('F9-08', tab: '/inside', after: (t) => _tap(t, '인기순')),
  Shot(
    'F9-09',
    h: 1301,
    build: (r) async => InsideDetailScreen(question: await _question(r, 'q-4')),
  ),
  Shot('F9-10', tab: '/inside'),
  // F10 로그인
  Shot('F10-01', build: (r) async => LoginScreen(auth: AuthRepository())),
  Shot('F10-02', build: (r) async => SimpleLoginScreen(auth: AuthRepository())),
  Shot(
    'F10-12',
    build: (r) async => SimpleLoginScreen(auth: AuthRepository(), signUp: true),
  ),
  Shot('F10-15', h: 906, build: (r) async => const TermsScreen()),
  Shot('F10-16', build: (r) async => const SignupCompleteScreen()),
];

Future<void> _loadFonts() async {
  final manifest =
      json.decode(await rootBundle.loadString('FontManifest.json')) as List;
  for (final font in manifest.cast<Map<String, dynamic>>()) {
    final loader = FontLoader(font['family'] as String);
    for (final f in (font['fonts'] as List).cast<Map<String, dynamic>>()) {
      loader.addFont(rootBundle.load(Uri.decodeFull(f['asset'] as String)));
    }
    await loader.load();
  }
  // 글꼴을 지정하지 않은 글자는 테스트 기본(Ahem 네모)으로 그려진다. 기기에서는 시스템 글꼴이므로 본문 글꼴로 대신한다.
  await (FontLoader(
    'Roboto',
  )..addFont(rootBundle.load('assets/fonts/42dotSans[wght].ttf'))).load();
}

Future<void> _precacheImages(WidgetTester t) => t.runAsync(() async {
  for (final e in find.byType(Image).evaluate().toList()) {
    await precacheImage((e.widget as Image).image, e);
  }
});

void main() {
  final out = Platform.environment['DESIGN_MATCH_OUT'];
  if (out == null) return;
  setUpAll(() async {
    Directory(out).createSync(recursive: true);
    await _loadFonts();
    // 이클립스 방어의 흔들기 센서. 플러그인이 없는 테스트 환경에서는 조용히 비운다.
    final messenger =
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger;
    messenger.setMockMethodCallHandler(
      const MethodChannel('dev.fluttercommunity.plus/sensors/method'),
      (_) async => null,
    );
    messenger.setMockStreamHandler(
      const EventChannel('dev.fluttercommunity.plus/sensors/accelerometer'),
      MockStreamHandler.inline(onListen: (_, _) {}),
    );
  });

  for (final s in shots) {
    testWidgets(s.id, (t) async {
      t.view.devicePixelRatio = 2;
      t.view.physicalSize = Size(_width * 2, s.h * 2);
      t.view.padding = _padding;
      t.view.viewPadding = _padding;
      addTearDown(t.view.reset);

      final repos = Repositories(live: false);
      final boundary = GlobalKey();
      final navigator = GlobalKey<NavigatorState>();
      Widget? pushed;
      Widget app;
      if (s.tab != null) {
        final router = buildRouter(
          AuthRepository()..signInWithMockSession(),
          repositories: repos,
        );
        router.go(s.tab!);
        app = MaterialApp.router(
          theme: buildAppTheme(),
          debugShowCheckedModeBanner: false,
          routerConfig: router,
        );
      } else {
        final screen = (await t.runAsync(() => s.build!(repos)))!;
        // 빈 화면 위에 push 해야 AppBar 가 뒤로가기 버튼을 그린다(앱에서도 push 로 연다).
        app = MaterialApp(
          theme: buildAppTheme(),
          debugShowCheckedModeBanner: false,
          navigatorKey: navigator,
          home: const SizedBox(),
        );
        pushed = screen;
      }
      await t.pumpWidget(RepaintBoundary(key: boundary, child: app));
      if (pushed != null) {
        final screen = pushed;
        navigator.currentState!.push(
          MaterialPageRoute<void>(builder: (_) => screen),
        );
      }
      await _settle(t);
      await s.after?.call(t);
      await _precacheImages(t);
      await _settle(t);

      await t.runAsync(() async {
        final image =
            await (boundary.currentContext!.findRenderObject()!
                    as RenderRepaintBoundary)
                .toImage(pixelRatio: 2);
        final png = await image.toByteData(format: ui.ImageByteFormat.png);
        await File('$out/${s.id}.png').writeAsBytes(png!.buffer.asUint8List());
        image.dispose();
      });
      // 글자 대조용 — compare.py 가 Figma spec 의 TEXT 노드와 맞춰 본다.
      final texts = [
        for (final e in find.byType(RichText).evaluate())
          if (e.renderObject case final RenderParagraph p
              when p.attached && p.text.toPlainText().trim().isNotEmpty)
            {
              'text': p.text.toPlainText(),
              'family': p.text.style?.fontFamily,
              'size': p.text.style?.fontSize,
              'weight': p.text.style?.fontWeight?.value,
              'color': p.text.style?.color?.toARGB32().toRadixString(16),
              'rect': [
                for (final v in [
                  p.localToGlobal(Offset.zero).dx,
                  p.localToGlobal(Offset.zero).dy,
                  p.size.width,
                  p.size.height,
                ])
                  v.roundToDouble(),
              ],
            },
      ];
      File(
        '$out/${s.id}.texts.json',
      ).writeAsStringSync(const JsonEncoder.withIndent(' ').convert(texts));
      // 렌더 예외(오버플로 등)는 실패로 올린다 — 비교 전에 고쳐야 할 것이다.
      expect(t.takeException(), isNull);
    });
  }
}