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/features/pets/pet_detail_page.dart';
import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
import 'package:patbond_flutter/features/pets/pet_form_page.dart';
import 'package:patbond_flutter/features/pets/pet_models.dart';
import 'package:patbond_flutter/features/pets/pets_controller.dart';
import 'package:patbond_flutter/features/pets/vaccination_records_page.dart';
import 'package:patbond_flutter/features/pets/weight_records_page.dart';

import '../../helpers/pet_test_helpers.dart';

void main() {
  late FakePetsRepository repository;
  late PetsController controller;

  setUp(() {
    repository = FakePetsRepository();
    controller = PetsController(repository: repository);
  });

  Future<void> pumpDetail(WidgetTester tester, {String petId = 'p-1'}) async {
    // 详情页自 T2-13 增加健康数据卡行，加高视口保证底部按钮在栏内。
    tester.view.physicalSize = const Size(700, 1800);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.reset);
    await tester.pumpWidget(
      MaterialApp(
        theme: buildAppTheme(),
        home: const Scaffold(body: Text('列表基底')),
      ),
    );
    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
    unawaited(
      navigator.push(
        MaterialPageRoute<void>(
          builder: (_) => PetDetailPage(controller: controller, petId: petId),
        ),
      ),
    );
    await tester.pump();
  }

  testWidgets('ready：档案字段齐备，owner 可见编辑入口', (tester) async {
    repository.getPetHandler = (petId) async => buildPet(
      'p-1',
      overrides: {
        'microchipNo': '985112000000001',
        'personality': '活泼',
        'sterilizedOn': '2025-06-01',
      },
    );

    await pumpDetail(tester);
    await tester.pumpAndSettle();

    expect(find.text('豆豆'), findsOneWidget);
    expect(find.text('基本资料'), findsOneWidget);
    expect(find.text('柴犬'), findsOneWidget);
    expect(find.text('男孩'), findsOneWidget);
    expect(find.text('2024-03-15'), findsOneWidget);
    expect(find.text('985112000000001'), findsOneWidget);
    expect(find.text('活泼'), findsOneWidget);
    expect(find.text('2025-06-01'), findsOneWidget);
    expect(find.byIcon(Icons.edit_outlined), findsWidgets);
    expect(find.text('编辑资料'), findsOneWidget);
  });

  testWidgets('生日估算标记与未填写字段兜底', (tester) async {
    repository.getPetHandler = (petId) async =>
        buildPet('p-1', overrides: {'birthDateEstimated': true});

    await pumpDetail(tester);
    await tester.pumpAndSettle();

    expect(find.text('2024-03-15（估算）'), findsOneWidget);
    // 芯片号 / 性格 / 绝育日期未填。
    expect(find.text('未填写'), findsNWidgets(3));
  });

  testWidgets('四态 · loading：无内存副本时居中转圈', (tester) async {
    final completer = Completer<Pet>();
    repository.getPetHandler = (petId) => completer.future;

    await pumpDetail(tester);
    await tester.pump();

    expect(find.byType(CircularProgressIndicator), findsOneWidget);

    completer.complete(buildPet('p-1'));
    await tester.pumpAndSettle();
    expect(find.text('豆豆'), findsOneWidget);
  });

  testWidgets('四态 · error/retry：无副本加载失败给横幅与重试', (tester) async {
    var calls = 0;
    repository.getPetHandler = (petId) async {
      calls++;
      if (calls == 1) throw const ApiNetworkException('断网');
      return buildPet('p-1');
    };

    await pumpDetail(tester);
    await tester.pumpAndSettle();

    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('豆豆'), findsOneWidget);
  });

  testWidgets('四态 · notFound（40401）：提示不存在，返回列表并触发刷新', (tester) async {
    repository.getPetHandler = (petId) async =>
        throw const PetNotFoundException(message: '不存在');
    var listCalls = 0;
    repository.listPetsHandler = () async {
      listCalls++;
      return const [];
    };

    await pumpDetail(tester);
    await tester.pumpAndSettle();

    expect(find.text('宠物不存在或已被删除'), findsOneWidget);

    await tester.tap(find.text('返回列表'));
    await tester.pumpAndSettle();

    expect(find.byType(PetDetailPage), findsNothing);
    expect(find.text('列表基底'), findsOneWidget);
    expect(listCalls, 1);
  });

  testWidgets('有内存副本时先渲染副本；后台刷新失败降级 SnackBar', (tester) async {
    repository.listPetsHandler = () async => [buildPet('p-1')];
    await controller.refresh();
    final completer = Completer<Pet>();
    repository.getPetHandler = (petId) => completer.future;

    await pumpDetail(tester);
    await tester.pump();

    // 副本即时渲染，无整页 loading。
    expect(find.text('豆豆'), findsOneWidget);
    expect(find.byType(CircularProgressIndicator), findsNothing);

    completer.completeError(const ApiNetworkException('断网'));
    await tester.pumpAndSettle();

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

  testWidgets('viewer 角色隐藏全部编辑入口（40300 语义）', (tester) async {
    repository.getPetHandler = (petId) async =>
        buildPet('p-1', overrides: {'myRole': 'viewer'});

    await pumpDetail(tester);
    await tester.pumpAndSettle();

    expect(find.byIcon(Icons.edit_outlined), findsNothing);
    expect(find.text('编辑资料'), findsNothing);
    expect(find.byIcon(Icons.edit), findsNothing);
  });

  testWidgets('owner 点编辑 → 进入编辑表单并预填', (tester) async {
    repository.getPetHandler = (petId) async => buildPet('p-1');

    await pumpDetail(tester);
    await tester.pumpAndSettle();

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

    expect(find.byType(PetFormPage), findsOneWidget);
    expect(find.text('编辑宠物资料'), findsOneWidget);
    expect(find.text('豆豆'), findsOneWidget);
  });

  group('T2-13 · 数据卡行接 summary', () {
    testWidgets('三卡取数：最新体重 / 疫苗进度 / 下一针（含疫苗名）', (tester) async {
      repository.getPetHandler = (petId) async => buildPet('p-1');
      String? capturedTz;
      repository.getPetSummaryHandler = (petId, tz) async {
        capturedTz = tz;
        return buildSummary();
      };

      await pumpDetail(tester);
      await tester.pumpAndSettle();

      expect(find.text('健康数据'), findsOneWidget);
      expect(find.text('4.35 kg'), findsOneWidget);
      expect(find.text('最新体重'), findsOneWidget);
      expect(find.text('2/3 针'), findsOneWidget);
      expect(find.text('疫苗进度'), findsOneWidget);
      expect(find.text('2026-08-01'), findsOneWidget);
      expect(find.text('下一针·狂犬疫苗'), findsOneWidget);
      // 本单不消费 monthlyExpense（T2-14），tz 不传走服务端缺省 UTC。
      expect(capturedTz, isNull);
    });

    testWidgets('null 语义：无登记显示空态而非 0/0', (tester) async {
      repository.getPetHandler = (petId) async => buildPet('p-1');
      repository.getPetSummaryHandler = (petId, tz) async => buildSummary(
        overrides: {
          'latestWeight': null,
          'vaccinationProgress': null,
          'nextVaccination': null,
        },
      );

      await pumpDetail(tester);
      await tester.pumpAndSettle();

      expect(find.text('暂无记录'), findsOneWidget);
      expect(find.text('未登记'), findsOneWidget);
      expect(find.text('暂无安排'), findsOneWidget);
      expect(find.textContaining('0/0'), findsNothing);
      expect(find.text('下一针'), findsOneWidget);
    });

    testWidgets('摘要加载失败：档案主链路不受阻，行内重试恢复', (tester) async {
      repository.getPetHandler = (petId) async => buildPet('p-1');
      var calls = 0;
      repository.getPetSummaryHandler = (petId, tz) async {
        calls++;
        if (calls == 1) throw const ApiNetworkException('断网');
        return buildSummary();
      };

      await pumpDetail(tester);
      await tester.pumpAndSettle();

      // 基本资料照常渲染，摘要行内错误 + 重试。
      expect(find.text('豆豆'), findsOneWidget);
      expect(find.text('健康数据加载失败'), findsOneWidget);

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

      expect(find.text('4.35 kg'), findsOneWidget);
      expect(find.text('健康数据加载失败'), findsNothing);
    });

    testWidgets('点体重卡 → 体重历史页；返回后重拉摘要', (tester) async {
      repository.getPetHandler = (petId) async => buildPet('p-1');
      var summaryCalls = 0;
      repository.getPetSummaryHandler = (petId, tz) async {
        summaryCalls++;
        return buildSummary();
      };
      repository.listWeightsHandler = (petId, limit, cursor) async =>
          const CursorPage(items: [], nextCursor: null, hasMore: false);

      await pumpDetail(tester);
      await tester.pumpAndSettle();

      await tester.tap(find.text('最新体重'));
      await tester.pumpAndSettle();

      expect(find.byType(WeightRecordsPage), findsOneWidget);
      expect(find.text('体重记录'), findsOneWidget);

      await tester.pageBack();
      await tester.pumpAndSettle();

      expect(summaryCalls, 2);
    });

    testWidgets('点疫苗卡 → 疫苗记录页（viewer 权限透传隐藏登记入口）', (tester) async {
      repository.getPetHandler = (petId) async =>
          buildPet('p-1', overrides: {'myRole': 'viewer'});
      repository.getPetSummaryHandler = (petId, tz) async => buildSummary();
      repository.listVaccinationsHandler = (petId) async => const [];

      await pumpDetail(tester);
      await tester.pumpAndSettle();

      await tester.tap(find.text('疫苗进度'));
      await tester.pumpAndSettle();

      expect(find.byType(VaccinationRecordsPage), findsOneWidget);
      // viewer：空态无 CTA、AppBar 无添加入口。
      expect(find.text('登记第一针'), findsNothing);
      expect(find.byIcon(Icons.add), findsNothing);
    });
  });
}