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/empty_state_illustration.dart';
import 'package:patbond_flutter/features/pets/health_event_edit_page.dart';
import 'package:patbond_flutter/features/pets/health_event_form_page.dart';
import 'package:patbond_flutter/features/pets/health_events_page.dart';
import 'package:patbond_flutter/features/pets/health_record_analytics.dart';
import 'package:patbond_flutter/features/pets/pet_models.dart';
import 'package:patbond_flutter/widgets/common.dart';

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

void main() {
  late FakePetsRepository repository;
  late List<(String, Map<String, dynamic>?)> events;
  late HealthRecordAnalytics analytics;

  setUp(() {
    repository = FakePetsRepository();
    events = [];
    analytics = HealthRecordAnalytics(
      (name, [props]) async => events.add((name, props)),
    );
  });

  List<Map<String, dynamic>?> eventsOf(String name) => [
    for (final e in events)
      if (e.$1 == name) e.$2,
  ];

  Future<void> pumpPage(
    WidgetTester tester, {
    bool canWrite = true,
    int? pageSize,
  }) async {
    tester.view.physicalSize = const Size(700, 1600);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.reset);
    await tester.pumpWidget(
      MaterialApp(
        theme: buildAppTheme(),
        home: const Scaffold(body: Text('详情基底')),
      ),
    );
    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
    unawaited(
      navigator.push(
        MaterialPageRoute<void>(
          builder: (_) => HealthEventsPage(
            repository: repository,
            petId: 'p-1',
            canWrite: canWrite,
            analytics: analytics,
            pageSize: pageSize,
          ),
        ),
      ),
    );
    await tester.pump();
  }

  CursorPage<HealthEvent> page(
    List<HealthEvent> items, {
    String? next,
    bool hasMore = false,
  }) => CursorPage(items: items, nextCursor: next, hasMore: hasMore);

  testWidgets('四态 · ready：六类条目、月分组组头、金额元展示、类型标签；viewed 一次', (tester) async {
    repository.listHealthEventsHandler = (petId, limit, cursor) async => page([
      buildHealthEvent(
        'e-1',
        overrides: {'occurredAt': '2026-09-05T14:00:00+08:00'},
      ),
      buildHealthEvent(
        'e-2',
        overrides: {
          'eventType': 'deworming',
          'title': '体内驱虫',
          'occurredAt': '2026-09-01T10:00:00+08:00',
          'amountCents': null,
          'notes': '博来恩',
        },
      ),
      buildHealthEvent(
        'e-3',
        overrides: {
          'eventType': 'note',
          'title': '换粮观察',
          'occurredAt': '2026-08-20T10:00:00+08:00',
          'amountCents': null,
        },
      ),
    ]);

    await pumpPage(tester);
    await tester.pumpAndSettle();

    // 月分组：9 月两条 + 8 月一条各一枚组头。
    expect(find.text('2026 年 9 月'), findsOneWidget);
    expect(find.text('2026 年 8 月'), findsOneWidget);
    // 条目标题与副行（日期 · 备注）。
    expect(find.text('皮肤检查'), findsOneWidget);
    expect(find.textContaining('· 博来恩'), findsOneWidget);
    // 类型 TagPill（图标 + 文字双通道）。
    expect(find.widgetWithText(TagPill, '就医'), findsOneWidget);
    expect(find.widgetWithText(TagPill, '驱虫'), findsOneWidget);
    expect(find.widgetWithText(TagPill, '随手记'), findsOneWidget);
    // 金额：12850 分 → 元展示；无金额条目不渲染金额。
    expect(find.text('¥128.50'), findsOneWidget);

    final viewed = eventsOf('health_record_viewed');
    expect(viewed.single, {
      'recordType': 'health_event',
      'source': 'pet_detail',
    });
  });

  testWidgets('四态 · loading / empty：空态插画 + 录入 CTA', (tester) async {
    final completer = Completer<CursorPage<HealthEvent>>();
    repository.listHealthEventsHandler = (petId, limit, cursor) =>
        completer.future;

    await pumpPage(tester);
    await tester.pump();
    expect(find.byType(CircularProgressIndicator), findsOneWidget);

    completer.complete(page(const []));
    await tester.pumpAndSettle();

    expect(find.byType(EmptyStateIllustration), findsOneWidget);
    expect(find.text('还没有健康记录'), findsOneWidget);
    expect(find.text('记录第一条'), findsOneWidget);
  });

  testWidgets('四态 · error/retry：横幅 + 重试恢复', (tester) async {
    var calls = 0;
    repository.listHealthEventsHandler = (petId, limit, cursor) async {
      calls++;
      if (calls == 1) throw const ApiNetworkException('断网');
      return page([buildHealthEvent('e-1')]);
    };

    await pumpPage(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('皮肤检查'), findsOneWidget);
  });

  testWidgets('cursor 分页：透传游标追加不重不漏，末页收起按钮；翻页失败保留重试', (tester) async {
    final captured = <(int?, String?)>[];
    var moreFails = true;
    repository.listHealthEventsHandler = (petId, limit, cursor) async {
      captured.add((limit, cursor));
      if (cursor == null) {
        return page([buildHealthEvent('e-1')], next: 'CUR-1', hasMore: true);
      }
      if (moreFails) {
        moreFails = false;
        throw const ApiNetworkException('断网');
      }
      return page([
        buildHealthEvent(
          'e-2',
          overrides: {
            'title': '洗澡美容',
            'eventType': 'grooming',
            'occurredAt': '2026-09-01T10:00:00+08:00',
            'amountCents': null,
          },
        ),
      ]);
    };

    await pumpPage(tester, pageSize: 1);
    await tester.pumpAndSettle();

    expect(find.text('皮肤检查'), findsOneWidget);
    expect(find.text('加载更多'), findsOneWidget);

    // 第一次翻页失败：SnackBar + 按钮保留。
    await tester.tap(find.text('加载更多'));
    await tester.pumpAndSettle();
    expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);
    expect(find.text('加载更多'), findsOneWidget);

    // 重试成功：追加且不重复，末页收起按钮。
    await tester.tap(find.text('加载更多'));
    await tester.pumpAndSettle();
    expect(find.text('皮肤检查'), findsOneWidget);
    expect(find.text('洗澡美容'), findsOneWidget);
    expect(find.text('加载更多'), findsNothing);

    expect(captured, [(1, null), (1, 'CUR-1'), (1, 'CUR-1')]);
  });

  testWidgets('录入闭环：CTA → 表单（record_form 路由名）→ 成功后重拉首页', (tester) async {
    var listCalls = 0;
    repository.listHealthEventsHandler = (petId, limit, cursor) async {
      listCalls++;
      return listCalls == 1
          ? page(const [])
          : page([
              buildHealthEvent('e-new', overrides: {'title': '首次体检'}),
            ]);
    };
    repository.createHealthEventHandler = (petId, request) async =>
        buildHealthEvent('e-new', overrides: {'title': '首次体检'});

    await pumpPage(tester);
    await tester.pumpAndSettle();

    await tester.tap(find.text('记录第一条'));
    await tester.pumpAndSettle();

    expect(find.byType(HealthEventFormPage), findsOneWidget);
    final route = ModalRoute.of(
      tester.element(find.byType(HealthEventFormPage)),
    )!;
    expect(route.settings.name, 'record_form');

    await tester.tap(find.text('就医'));
    await tester.pump();
    await tester.enterText(
      find.widgetWithText(TextFormField, '标题（如：皮肤检查）'),
      '首次体检',
    );
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    expect(find.byType(HealthEventFormPage), findsNothing);
    expect(find.text('已记录健康事件'), findsOneWidget);
    // 排序/月分组以服务端为准：成功后重拉首页。
    expect(listCalls, 2);
    expect(find.text('首次体检'), findsOneWidget);
  });

  testWidgets('编辑闭环：点条目 → 编辑页（无路由名）→ 成功后就地替换', (tester) async {
    repository.listHealthEventsHandler = (petId, limit, cursor) async =>
        page([buildHealthEvent('e-1')]);
    repository.updateHealthEventHandler = (eventId, request) async =>
        buildHealthEvent('e-1', overrides: {'title': '皮肤复查', 'version': 2});

    await pumpPage(tester);
    await tester.pumpAndSettle();

    await tester.tap(find.text('皮肤检查'));
    await tester.pumpAndSettle();

    expect(find.byType(HealthEventEditPage), findsOneWidget);
    final route = ModalRoute.of(
      tester.element(find.byType(HealthEventEditPage)),
    )!;
    // 编辑页不带路由名：record_form 专属创建漏斗到达段。
    expect(route.settings.name, isNull);

    await tester.enterText(find.widgetWithText(TextFormField, '标题'), '皮肤复查');
    await tester.tap(find.text('保存修改'));
    await tester.pumpAndSettle();

    expect(find.byType(HealthEventEditPage), findsNothing);
    expect(find.text('已保存修改'), findsOneWidget);
    expect(find.text('皮肤复查'), findsOneWidget);
    expect(find.text('皮肤检查'), findsNothing);
  });

  testWidgets('viewer（canWrite=false）：无录入入口、空态无 CTA、点条目不进编辑', (tester) async {
    repository.listHealthEventsHandler = (petId, limit, cursor) async =>
        page([buildHealthEvent('e-1')]);

    await pumpPage(tester, canWrite: false);
    await tester.pumpAndSettle();

    expect(find.byIcon(Icons.add), findsNothing);

    await tester.tap(find.text('皮肤检查'));
    await tester.pumpAndSettle();
    expect(find.byType(HealthEventEditPage), findsNothing);
  });
}