import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:patbond_flutter/core/network/api_exception.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
import 'package:patbond_flutter/features/auth/auth_models.dart';
import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/features/profile/profile_controller.dart';
import 'package:patbond_flutter/features/profile/profile_edit_page.dart';
import 'package:patbond_flutter/features/profile/profile_page.dart';
import 'package:patbond_flutter/state/app_state.dart';

import '../../helpers/auth_test_helpers.dart';
import '../../helpers/community_test_helpers.dart';

void main() {
  late FakeCommunityRepository community;

  setUp(() {
    community = FakeCommunityRepository();
    community.onGetMyCommunityStats = () async =>
        CommunityStats.fromJson(sampleCommunityStatsJson());
    community.onGetFollowStats = (_) async =>
        FollowStats.fromJson(sampleFollowStatsJson());
  });

  Future<ProfileController> pumpProfile(
    WidgetTester tester, {
    required FakeAuthRepository auth,
  }) async {
    // 资料页头部 + 五行菜单 + 两个底部按钮，加高视口保证全在栏内。
    tester.view.physicalSize = const Size(700, 2400);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.reset);
    final controller = ProfileController(
      authRepository: auth,
      communityRepository: community,
    );
    addTearDown(controller.dispose);
    await tester.pumpWidget(
      MaterialApp(
        theme: buildAppTheme(),
        home: Scaffold(
          body: ProfilePage(appState: AppState(), controller: controller),
        ),
      ),
    );
    return controller;
  }

  testWidgets('loading 态：居中转圈，无 demo 文案', (tester) async {
    final gate = Completer<UserProfile>();
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(meHandler: () => gate.future),
    );
    // 预取推到帧末，故先走一帧再断言。
    await tester.pump();

    expect(find.byType(CircularProgressIndicator), findsOneWidget);
    expect(find.text('萌宠新手（豆豆家长）'), findsNothing);
    expect(find.text('Patbond 社区创作达人'), findsNothing);

    gate.complete(buildProfile());
    await tester.pumpAndSettle();
  });

  testWidgets('ready + 有昵称：展示昵称与 @username，四个数字来自服务端', (tester) async {
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(
        meHandler: () async => buildProfile(username: 'llx', nickname: '小柴'),
      ),
    );
    await tester.pumpAndSettle();

    expect(find.text('小柴'), findsOneWidget);
    expect(find.text('@llx'), findsOneWidget);
    // 24 关注我 / 7 我关注 / 128 获赞 / 12 作品（helpers 样本）。
    expect(find.text('24'), findsOneWidget);
    expect(find.text('7'), findsOneWidget);
    expect(find.text('128'), findsOneWidget);
    expect(find.text('12'), findsOneWidget);
    expect(find.text('获赞'), findsOneWidget);
    expect(find.text('我的作品'), findsOneWidget);
    // demo 硬编码彻底退役。
    expect(find.text('1.8k'), findsNothing);
    expect(find.text('萌宠新手（豆豆家长）'), findsNothing);
  });

  testWidgets('ready + 无昵称：展示名回退 username（回退在客户端展示层）', (tester) async {
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(
        meHandler: () async => buildProfile(username: 'llx'),
      ),
    );
    await tester.pumpAndSettle();

    // 展示名与 @username 两处都是 llx。
    expect(find.text('llx'), findsOneWidget);
    expect(find.text('@llx'), findsOneWidget);
  });

  testWidgets('空数据：四个数字全 0（不是空白、不是错误态）', (tester) async {
    community.onGetMyCommunityStats = () async => CommunityStats.fromJson(
      sampleCommunityStatsJson(receivedLikeCount: 0, publishedPostCount: 0),
    );
    community.onGetFollowStats = (_) async => FollowStats.fromJson(
      sampleFollowStatsJson(followerCount: 0, followingCount: 0),
    );
    await pumpProfile(tester, auth: FakeAuthRepository());
    await tester.pumpAndSettle();

    expect(find.text('0'), findsNWidgets(4));
    expect(find.text('统计加载失败'), findsNothing);
  });

  testWidgets('error 态：横幅 + 重试；重试成功进 ready', (tester) async {
    var attempts = 0;
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(
        meHandler: () async {
          attempts += 1;
          if (attempts == 1) throw const ApiNetworkException('断网');
          return buildProfile(nickname: '小柴');
        },
      ),
    );
    await tester.pumpAndSettle();

    expect(find.byType(InlineErrorBanner), findsOneWidget);
    expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);

    await tester.tap(find.text('重试'));
    await tester.pumpAndSettle();

    expect(find.text('小柴'), findsOneWidget);
    expect(find.byType(InlineErrorBanner), findsNothing);
  });

  testWidgets('统计块独立降级：资料照常显示，统计给「加载失败 + 重试」', (tester) async {
    var statsAttempts = 0;
    community.onGetMyCommunityStats = () async {
      statsAttempts += 1;
      if (statsAttempts == 1) throw const ApiNetworkException('断网');
      return CommunityStats.fromJson(sampleCommunityStatsJson());
    };
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(
        meHandler: () async => buildProfile(nickname: '小柴'),
      ),
    );
    await tester.pumpAndSettle();

    expect(find.text('小柴'), findsOneWidget, reason: '统计失败不该拖垮整页');
    expect(find.text('统计加载失败'), findsOneWidget);

    await tester.tap(find.text('重试'));
    await tester.pumpAndSettle();

    expect(find.text('128'), findsOneWidget);
    expect(find.text('统计加载失败'), findsNothing);
  });

  testWidgets('点「编辑资料」进编辑页；保存成功回资料页并提示', (tester) async {
    final auth = FakeAuthRepository(
      meHandler: () async => buildProfile(username: 'llx'),
      updateMeHandler: (_) async =>
          buildProfile(username: 'llx', nickname: '小柴'),
    );
    await pumpProfile(tester, auth: auth);
    await tester.pumpAndSettle();

    await tester.tap(find.text('编辑资料'));
    await tester.pumpAndSettle();
    expect(find.byType(ProfileEditPage), findsOneWidget);

    await tester.enterText(find.byType(TextFormField), '小柴');
    await tester.pump();
    await tester.tap(find.text('保存'));
    await tester.pumpAndSettle();

    expect(find.byType(ProfileEditPage), findsNothing);
    expect(find.text('资料已更新'), findsOneWidget);
    // 头部随之更新为新昵称。
    expect(find.text('小柴'), findsOneWidget);
  });

  testWidgets('未装配上传能力时编辑页不渲染头像入口', (tester) async {
    await pumpProfile(
      tester,
      auth: FakeAuthRepository(meHandler: () async => buildProfile()),
    );
    await tester.pumpAndSettle();

    await tester.tap(find.text('编辑资料'));
    await tester.pumpAndSettle();

    expect(find.text('更换头像'), findsNothing);
    expect(find.byType(TextFormField), findsOneWidget, reason: '昵称输入仍在');
  });
}