import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:qiangbao_accounting/api/health_api.dart';
import 'package:qiangbao_accounting/models/health.dart';
import 'package:qiangbao_accounting/pages/health/health_home_page.dart';

/// 「强宝健康」的页面布局回归测试。
///
/// 只断言「不溢出、不抛异常」——具体样式靠人眼验收。价值在于：
/// 顶部那行「65.0 / 已减 1.8kg / 每周应减 0.54kg」在窄屏上很容易挤爆，
/// 而光看代码看不出来（记账页就栽过这个）。
///
/// 两个测试上的坑（在这个项目里踩过）：
///   1. 页面上的加载圈是**无限动画**，`pumpAndSettle` 永远等不到静止 → 超时。
///      所以只能用显式 `pump`。
///   2. Provider 里的接口调用要换成假的，否则会真的去连 localhost，
///      每个用例白等好几秒。
void main() {
  /// 常见机型宽度：小屏安卓 / iPhone 13 / 大屏
  const sizes = [
    ('小屏', Size(320, 568)),
    ('常规', Size(393, 851)),
    ('大屏', Size(430, 932)),
  ];

  for (final (label, size) in sizes) {
    testWidgets('主页 $label 不溢出', (tester) async {
      await _pumpHome(tester, size);

      expect(find.text('强宝健康'), findsOneWidget);
      expect(find.text('减肥进度'), findsOneWidget);
      expect(find.text('当前体重'), findsOneWidget);
      expect(find.text('今日饮食'), findsOneWidget);
      expect(tester.takeException(), isNull);
    });
  }

  testWidgets('没设过目标时显示「去设置」引导', (tester) async {
    await _pumpHome(tester, const Size(393, 851),
        goal: WeightGoal.none, chart: WeightChart.empty);

    expect(find.text('去设置'), findsOneWidget);
    expect(find.textContaining('还没设目标'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('有目标时显示进度、已减、每周应减', (tester) async {
    await _pumpHome(tester, const Size(393, 851), goal: _goalWithPlan());

    expect(find.textContaining('已减'), findsOneWidget);
    expect(find.textContaining('每周应减'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('每周超过 1kg 时显示「节奏偏快」提示', (tester) async {
    await _pumpHome(
      tester,
      const Size(393, 851),
      goal: _goalWithPlan(weeklyLoss: 2.33, unhealthy: true),
    );

    expect(find.textContaining('节奏偏快'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('没记过体重时不显示脏数字（显示 --）', (tester) async {
    await _pumpHome(
      tester,
      const Size(393, 851),
      goal: _goalWithPlan(currentWeight: null, lostWeight: null,
          remainWeight: null),
      chart: WeightChart.empty,
    );

    expect(find.text('--'), findsWidgets);
    expect(find.textContaining('还没记体重'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('今日饮食有记录时列出餐次和热量', (tester) async {
    await _pumpHome(
      tester,
      const Size(393, 851),
      goal: _goalWithPlan(),
      diet: _dietWithMeals(),
    );

    expect(find.textContaining('鸡蛋'), findsOneWidget);
    expect(find.text('记一笔'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('接口报错时三个卡片仍可用（不整页变错误态）', (tester) async {
    await _pumpHome(tester, const Size(393, 851), failing: true);

    // 卡片还在，只是内容退化成空态 —— 用户该能点进去重试
    expect(find.text('减肥进度'), findsOneWidget);
    expect(find.text('当前体重'), findsOneWidget);
    expect(find.text('今日饮食'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });
}

// ==================================================================
// 假数据
// ==================================================================

WeightGoal _goalWithPlan({
  double? currentWeight = 63.2,
  double? lostWeight = 1.8,
  double? remainWeight = 5.2,
  double weeklyLoss = 0.54,
  bool unhealthy = false,
}) {
  return WeightGoal.fromJson({
    'hasGoal': true,
    'id': 1,
    'startWeight': 65.0,
    'targetWeight': 58.0,
    'startDate': '2026-01-01',
    'targetDate': '2026-04-01',
    'totalWeeks': 13,
    'weeklyLoss': weeklyLoss,
    'weeklyLossUnhealthy': unhealthy,
    'idealCurve': [
      {'date': '2026-01-01', 'weight': 65.0},
      {'date': '2026-02-01', 'weight': 62.8},
    ],
    'currentWeight': currentWeight,
    'lostWeight': lostWeight,
    'remainWeight': remainWeight,
    'weightProgress': 0.257,
    'timeProgress': 0.4,
  });
}

DietDay _dietWithMeals() {
  return DietDay.fromJson({
    'date': '2026-09-28',
    'totals': {
      'energyKcal': 1280.5,
      'protein': 62.3,
      'fat': 41.0,
      'carbohydrate': 168.2,
      'dietaryFiber': 12.5,
      'sodium': 2100.0,
      'itemCount': 2,
    },
    'meals': [
      {
        'mealType': 'breakfast',
        'totals': {'energyKcal': 300.0, 'itemCount': 2},
        'items': [
          {
            'id': 1,
            'mealType': 'breakfast',
            'foodName': '鸡蛋',
            'amountGrams': 50,
            'energyKcal': 72.0,
          },
          {
            'id': 2,
            'mealType': 'breakfast',
            'foodName': '牛奶',
            'amountGrams': 200,
            'energyKcal': 228.0,
          },
        ],
      },
    ],
  });
}

WeightChart _chartWithPoints() {
  return WeightChart.fromJson({
    'points': [
      {'date': '2026-09-01', 'weight': 65.0},
      {'date': '2026-09-10', 'weight': 64.0},
      {'date': '2026-09-20', 'weight': 63.2},
    ],
    'currentWeight': 63.2,
    'delta': -0.8,
    'maxWeight': 65.0,
    'minWeight': 58.0,
  });
}

// ==================================================================
// 假接口
// ==================================================================

class _FakeHealthApi extends HealthApi {
  _FakeHealthApi({
    required this.weightGoal,
    required this.weightChartData,
    required this.diet,
    this.failing = false,
  }) : super(Dio());

  final WeightGoal weightGoal;
  final WeightChart weightChartData;
  final DietDay diet;
  final bool failing;

  @override
  Future<WeightGoal> goal() async {
    if (failing) throw Exception('boom');
    return weightGoal;
  }

  @override
  Future<WeightChart> weightChart({int days = 90}) async {
    if (failing) throw Exception('boom');
    return weightChartData;
  }

  @override
  Future<DietDay> dietDay({DateTime? date}) async {
    if (failing) throw Exception('boom');
    return diet;
  }

  @override
  Future<NutritionTotals> todayTotals() async {
    if (failing) throw Exception('boom');
    return diet.totals;
  }
}

/// 起页面：把三个 provider 都换成假数据，然后显式 pump 两帧
Future<void> _pumpHome(
  WidgetTester tester,
  Size size, {
  WeightGoal? goal,
  WeightChart? chart,
  DietDay? diet,
  bool failing = false,
}) async {
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1.0;
  addTearDown(tester.view.reset);

  final fake = _FakeHealthApi(
    weightGoal: goal ?? _goalWithPlan(),
    weightChartData: chart ?? _chartWithPoints(),
    diet: diet ?? _dietWithMeals(),
    failing: failing,
  );

  await tester.pumpWidget(
    ProviderScope(
      overrides: [healthApiProvider.overrideWithValue(fake)],
      child: const MaterialApp(home: HealthHomePage()),
    ),
  );

  // 不用 pumpAndSettle：页面里的加载圈是无限动画，等不到静止会超时。
  // 显式 pump 两帧足够让 FutureProvider 完成并重建。
  await tester.pump();
  await tester.pump(const Duration(milliseconds: 50));
  await tester.pump(const Duration(milliseconds: 50));
}