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/health_record_analytics.dart';
import 'package:patbond_flutter/features/pets/pet_exceptions.dart';
import 'package:patbond_flutter/features/pets/pet_models.dart';
import 'package:patbond_flutter/features/pets/weight_form_page.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> pumpForm(WidgetTester tester) 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('列表基底')),
      ),
    );
    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
    unawaited(
      navigator.push(
        MaterialPageRoute<void>(
          builder: (_) => WeightFormPage(
            repository: repository,
            petId: 'p-1',
            analytics: analytics,
          ),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  Finder weightField() => find.widgetWithText(TextFormField, '体重（公斤）');

  testWidgets('空值提交拦截 + failed(validation_error)', (tester) async {
    await pumpForm(tester);

    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    expect(find.text('请输入体重'), findsOneWidget);
    final failed = eventsOf('health_record_create_failed');
    expect(failed.single!['recordType'], 'weight');
    expect(failed.single!['failureReason'], 'validation_error');
    expect(failed.single!['attemptSeq'], 1);
  });

  testWidgets('契约区间前端拦截：>500 与三位小数均不放行、不发请求', (tester) async {
    var createCalls = 0;
    repository.createWeightHandler = (petId, request) async {
      createCalls++;
      return buildWeight('w-x');
    };
    await pumpForm(tester);

    await tester.enterText(weightField(), '500.5');
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();
    expect(find.text('体重需大于 0 且不超过 500 公斤，最多两位小数'), findsOneWidget);

    await tester.enterText(weightField(), '4.356');
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();
    expect(find.text('体重需大于 0 且不超过 500 公斤，最多两位小数'), findsOneWidget);

    expect(createCalls, 0);
    expect(eventsOf('health_record_create_failed'), hasLength(2));
  });

  testWidgets('首次输入触发 started（每次进入仅一次，recordType=weight）', (tester) async {
    await pumpForm(tester);

    expect(eventsOf('health_record_create_started'), isEmpty);

    await tester.enterText(weightField(), '4');
    await tester.enterText(weightField(), '4.3');
    await tester.pumpAndSettle();

    final started = eventsOf('health_record_create_started');
    expect(started, hasLength(1));
    expect(started.single, {
      'recordType': 'weight',
      'entryPoint': 'record_list',
    });
  });

  testWidgets('保存成功：请求对齐契约（UTC 时间戳、note 可选）、pop 回列表、succeeded', (tester) async {
    CreateWeightRequest? captured;
    repository.createWeightHandler = (petId, request) async {
      expect(petId, 'p-1');
      captured = request;
      return buildWeight('w-new', weightKg: 4.35);
    };

    await pumpForm(tester);
    await tester.enterText(weightField(), '4.35');
    await tester.enterText(
      find.widgetWithText(TextFormField, '备注（可选，如：饭后称重）'),
      '饭后',
    );
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    final json = captured!.toJson();
    expect(json['weightKg'], 4.35);
    expect(json['note'], '饭后');
    // 今日称重取此刻并转 UTC（ISO 带 Z 后缀，避免服务端时区歧义）。
    expect(json['measuredAt'], endsWith('Z'));
    expect(json.containsKey('source'), isFalse);

    expect(find.text('列表基底'), findsOneWidget);
    final succeeded = eventsOf('health_record_create_succeeded');
    expect(succeeded.single!['recordType'], 'weight');
    expect(succeeded.single!['durationMs'], isA<int>());
    expect(succeeded.single!['photoCount'], 0);
  });

  testWidgets('40000 后端兜底：横幅提示 + failed 带 errorCode/httpStatus', (
    tester,
  ) async {
    repository.createWeightHandler = (petId, request) async =>
        throw const ApiBusinessException(code: 40000, message: '参数校验失败');

    await pumpForm(tester);
    await tester.enterText(weightField(), '4.35');
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    expect(find.text('请检查填写内容后重试'), findsOneWidget);
    expect(find.byType(WeightFormPage), findsOneWidget);
    final failed = eventsOf('health_record_create_failed');
    expect(failed.single!['errorCode'], 40000);
    expect(failed.single!['httpStatus'], 400);
    expect(failed.single!['failureReason'], 'validation_error');
  });

  testWidgets('40300 viewer 越权兜底：横幅 + failed(permission_denied)', (
    tester,
  ) async {
    repository.createWeightHandler = (petId, request) async =>
        throw const PetAccessDeniedException(message: '无权限');

    await pumpForm(tester);
    await tester.enterText(weightField(), '4.35');
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    expect(find.text('你没有权限为该宠物添加记录'), findsOneWidget);
    expect(
      eventsOf('health_record_create_failed').single!['failureReason'],
      'permission_denied',
    );
  });

  testWidgets('网络异常：SnackBar + 重试动作 + failed(network_error)', (tester) async {
    repository.createWeightHandler = (petId, request) async =>
        throw const ApiNetworkException('断网');

    await pumpForm(tester);
    await tester.enterText(weightField(), '4.35');
    await tester.tap(find.text('保存记录'));
    await tester.pumpAndSettle();

    expect(find.text('网络异常，请检查网络后重试'), findsOneWidget);
    expect(find.text('重试'), findsOneWidget);
    expect(
      eventsOf('health_record_create_failed').single!['failureReason'],
      'network_error',
    );
  });
}