import 'package:flutter/material.dart';
import 'package:patbond_flutter/core/navigation/fade_route.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/avatar_upload_sheet.dart';
import 'package:patbond_flutter/core/widgets/empty_state_illustration.dart';
import 'package:patbond_flutter/core/widgets/inline_error_banner.dart';
import 'package:patbond_flutter/core/widgets/pet_avatar.dart';
import 'package:patbond_flutter/core/widgets/record_type_dot.dart';
import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/features/pets/care_reminders_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/health_record_display.dart';
import 'package:patbond_flutter/features/pets/money.dart';
import 'package:patbond_flutter/features/pets/pet_analytics.dart';
import 'package:patbond_flutter/features/pets/pet_display.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 'package:patbond_flutter/widgets/common.dart';

enum _DetailPhase { loading, ready, error, notFound }

enum _SummaryPhase { loading, ready, error }

enum _RemindersPhase { loading, ready, error }

/// 宠物详情页（T2-12 / 05 号规范 §4.2 P2 的档案信息部分）。
///
/// 打开即用控制器内存副本首屏渲染，同时经 [PetsController.getPet]
/// 拉取最新详情（同步列表副本）。四态：loading / ready / error+重试 /
/// notFound（40401 防枚举三态同响应 → 提示后返回列表并刷新）。
///
/// T2-13：数据卡行接 `GET /pets/{id}/summary` 实时聚合（最新体重 /
/// 疫苗进度 / 下一针，null 语义为空态文案而非 0/0），并作为体重历史、
/// 疫苗记录两页的导航入口；从记录页返回即重拉摘要。
class PetDetailPage extends StatefulWidget {
  const PetDetailPage({
    required this.controller,
    required this.petId,
    super.key,
    this.analytics,
    this.healthAnalytics,
    this.avatarUploaderBuilder,
  });

  final PetsController controller;
  final String petId;
  final PetAnalytics? analytics;
  final HealthRecordAnalytics? healthAnalytics;

  /// 头像上传编排器构造口（T3.5-09）；null 即本次构建未装配上传能力，
  /// 隐藏头像编辑入口（生产装配恒注入，见 `app.dart`）。
  final AvatarUploaderBuilder? avatarUploaderBuilder;

  @override
  State<PetDetailPage> createState() => _PetDetailPageState();
}

class _PetDetailPageState extends State<PetDetailPage> {
  _DetailPhase _phase = _DetailPhase.loading;
  Pet? _pet;
  ApiException? _error;

  _SummaryPhase _summaryPhase = _SummaryPhase.loading;
  PetSummary? _summary;

  _RemindersPhase _remindersPhase = _RemindersPhase.loading;
  List<CareReminder> _pendingReminders = const [];

  @override
  void initState() {
    super.initState();
    _pet = _fromController();
    if (_pet != null) _phase = _DetailPhase.ready;
    _load();
    _loadSummary();
    _loadPendingReminders();
  }

  Pet? _fromController() {
    for (final pet in widget.controller.pets) {
      if (pet.id == widget.petId) return pet;
    }
    return null;
  }

  Future<void> _load() async {
    if (_pet == null) {
      setState(() => _phase = _DetailPhase.loading);
    }
    try {
      final pet = await widget.controller.getPet(widget.petId);
      if (!mounted) return;
      setState(() {
        _pet = pet;
        _phase = _DetailPhase.ready;
      });
    } on PetNotFoundException {
      if (!mounted) return;
      setState(() => _phase = _DetailPhase.notFound);
    } on ApiException catch (error) {
      if (!mounted) return;
      if (_pet == null) {
        setState(() {
          _error = error;
          _phase = _DetailPhase.error;
        });
      } else {
        // 已有内存副本：刷新失败降级为瞬态提示，不打断阅读。
        ScaffoldMessenger.of(
          context,
        ).showSnackBar(SnackBar(content: Text(petLoadErrorMessage(error))));
      }
    }
  }

  /// 摘要实时聚合（40401 由主链路 notFound 态承载，摘要只降级为 error 态）。
  /// `tz` 透传设备时区固定偏移（T2-13 遗留③）：monthlyExpense 的月度
  /// 窗口随设备时区取边界，与用户直觉一致。
  Future<void> _loadSummary() async {
    setState(() => _summaryPhase = _SummaryPhase.loading);
    try {
      final summary = await widget.controller.repository.getPetSummary(
        widget.petId,
        tz: tzOffsetQueryValue(DateTime.now().timeZoneOffset),
      );
      if (!mounted) return;
      setState(() {
        _summary = summary;
        _summaryPhase = _SummaryPhase.ready;
      });
    } on ApiException {
      if (!mounted) return;
      setState(() => _summaryPhase = _SummaryPhase.error);
    }
  }

  /// 待办提醒（?status=pending，due_at ASC）：驱动「健康提醒」卡与
  /// 提醒入口副行——demo 时代的硬编码提醒文案自此为真实数据取代。
  /// 失败只降级为入口副行提示，不阻塞档案主链路。
  Future<void> _loadPendingReminders() async {
    setState(() => _remindersPhase = _RemindersPhase.loading);
    try {
      final reminders = await widget.controller.repository.listCareReminders(
        widget.petId,
        status: CareReminderStatus.pending,
      );
      if (!mounted) return;
      setState(() {
        _pendingReminders = reminders;
        _remindersPhase = _RemindersPhase.ready;
      });
    } on ApiException {
      if (!mounted) return;
      setState(() => _remindersPhase = _RemindersPhase.error);
    }
  }

  Future<void> _openEdit() async {
    final pet = _pet;
    if (pet == null) return;
    final updated = await Navigator.of(context).push<Pet>(
      // 编辑态不带路由名：pet_form 专属建宠漏斗到达段（06 §1.6），
      // 编辑曝光不计入，避免「到达→动笔」分母虚高。
      fadePageRoute(
        PetFormPage.edit(
          controller: widget.controller,
          pet: pet,
          analytics: widget.analytics,
        ),
      ),
    );
    if (updated != null && mounted) {
      setState(() {
        _pet = updated;
        _phase = _DetailPhase.ready;
      });
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(const SnackBar(content: Text('已保存修改')));
    }
  }

  /// 仅 owner 可改档案（40300：caregiver/viewer 改档案被拒 → 隐藏写入口）。
  bool get _canEdit =>
      _phase == _DetailPhase.ready && _pet?.myRole == PetRole.owner;

  /// 记录写入权限档 WRITE（owner + caregiver）；viewer 隐藏录入入口。
  bool get _canWriteRecords => _pet?.myRole != PetRole.viewer;

  /// 头像写入权限档 **WRITE**（ADR-022 决策 D3.5-3：头像属日常照护信息，
  /// 与体重/疫苗同档，owner + caregiver 均可改；viewer 只读）。
  ///
  /// 注意这与 [_canEdit]（MANAGE，仅 owner）**刻意不同**：服务端按「本次
  /// 请求触及了哪些字段」定档——只带 avatarAssetId 走 WRITE，碰任一资料
  /// 字段即 MANAGE。故这里只发纯头像 PATCH，不夹带任何资料字段。
  bool get _canEditAvatar =>
      _phase == _DetailPhase.ready &&
      _pet?.myRole != PetRole.viewer &&
      widget.avatarUploaderBuilder != null;

  /// 头像入口：已有头像时先给「更换 / 移除」二选一，没有则直接拉起上传。
  Future<void> _onAvatarTap() async {
    final pet = _pet;
    if (pet == null || !_canEditAvatar) return;
    if (pet.avatarUrl == null) {
      await _uploadAvatar();
      return;
    }
    final action = await showModalBottomSheet<String>(
      context: context,
      showDragHandle: true,
      builder: (context) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            ListTile(
              leading: const Icon(Icons.photo_camera_outlined),
              title: const Text('更换头像'),
              onTap: () => Navigator.pop(context, 'replace'),
            ),
            ListTile(
              leading: const Icon(
                Icons.delete_outline,
                color: AppColors.errorDark,
              ),
              title: const Text(
                '移除头像',
                style: TextStyle(color: AppColors.errorDark),
              ),
              onTap: () => Navigator.pop(context, 'clear'),
            ),
          ],
        ),
      ),
    );
    if (!mounted || action == null) return;
    if (action == 'replace') {
      await _uploadAvatar();
    } else {
      // 三态「显式 null」= 清除头像（缺省是「不改」，两者在 JSON 上不同）。
      await _patchAvatar(const PatchField<String>.clear(), '已移除头像');
    }
  }

  Future<void> _uploadAvatar() async {
    final builder = widget.avatarUploaderBuilder;
    if (builder == null) return;
    final assetId = await showAvatarUploadSheet(
      context,
      builder: builder,
      // 用途即引用侧的类型检查：帖图或用户头像挂到宠物上会被答 404/40405。
      purpose: MediaPurpose.petAvatar,
    );
    if (assetId == null || !mounted) return;
    await _patchAvatar(PatchField<String>.value(assetId), '头像已更新');
  }

  /// 纯头像 PATCH：请求体只有 `version` + `avatarAssetId`，**不带任何资料
  /// 字段**——夹带资料字段会把权限档从 WRITE 抬到 MANAGE，caregiver 立刻
  /// 403（服务端刻意按更严的一半判，堵「夹带改名」）。
  Future<void> _patchAvatar(PatchField<String> intent, String okMessage) async {
    final pet = _pet;
    if (pet == null) return;
    try {
      final updated = await widget.controller.updatePet(
        pet.id,
        UpdatePetRequest(version: pet.version, avatarAssetId: intent),
      );
      if (!mounted) return;
      setState(() {
        _pet = updated;
        _phase = _DetailPhase.ready;
      });
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(SnackBar(content: Text(okMessage)));
    } on PetVersionConflictException catch (error) {
      // 40902：他人已改过这行。重取档案拿新 version，让用户自行决定是否重来
      // （不静默重放——头像是用户可见的覆盖操作，不该自动生效两次）。
      if (!mounted) return;
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(SnackBar(content: Text(petAvatarSaveErrorMessage(error))));
      await _load();
    } on ApiException catch (error) {
      if (!mounted) return;
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(SnackBar(content: Text(petAvatarSaveErrorMessage(error))));
    }
  }

  Future<void> _openWeights(Pet pet) async {
    await Navigator.of(context).push(
      // 列表页页名不在字典 v2 枚举内（06 §5.2 验收 4：字典外不上报），
      // 曝光由 health_record_viewed 承载。
      fadePageRoute(
        WeightRecordsPage(
          repository: widget.controller.repository,
          petId: pet.id,
          canWrite: _canWriteRecords,
          analytics: widget.healthAnalytics,
        ),
      ),
    );
    // 记录可能已变化：返回即重拉摘要（服务端实时聚合是唯一事实来源）。
    if (mounted) await _loadSummary();
  }

  Future<void> _openVaccinations(Pet pet) async {
    await Navigator.of(context).push(
      fadePageRoute(
        VaccinationRecordsPage(
          repository: widget.controller.repository,
          petId: pet.id,
          petSpecies: pet.species,
          canWrite: _canWriteRecords,
          analytics: widget.healthAnalytics,
        ),
      ),
    );
    if (mounted) await _loadSummary();
  }

  Future<void> _openTimeline(Pet pet) async {
    await Navigator.of(context).push(
      fadePageRoute(
        HealthEventsPage(
          repository: widget.controller.repository,
          petId: pet.id,
          canWrite: _canWriteRecords,
          analytics: widget.healthAnalytics,
        ),
      ),
    );
    // 事件可能已变化：返回即重拉摘要（月度花费实时聚合）。
    if (mounted) await _loadSummary();
  }

  Future<void> _openReminders(Pet pet) async {
    await Navigator.of(context).push(
      fadePageRoute(
        CareRemindersPage(
          repository: widget.controller.repository,
          petId: pet.id,
          canWrite: _canWriteRecords,
          analytics: widget.healthAnalytics,
        ),
      ),
    );
    // 待办可能已变化（完成/忽略/新建）：返回即重拉待办。
    if (mounted) await _loadPendingReminders();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.transparent,
        elevation: 0,
        foregroundColor: AppColors.ink,
        actions: [
          if (_canEdit)
            IconButton(
              tooltip: '编辑资料',
              onPressed: _openEdit,
              icon: const Icon(Icons.edit_outlined),
            ),
        ],
      ),
      body: switch (_phase) {
        _DetailPhase.loading => const Center(
          child: CircularProgressIndicator(),
        ),
        _DetailPhase.error => Center(
          child: Padding(
            padding: const EdgeInsets.all(24),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                InlineErrorBanner(message: petLoadErrorMessage(_error)),
                const SizedBox(height: 16),
                FilledButton(onPressed: _load, child: const Text('重试')),
              ],
            ),
          ),
        ),
        _DetailPhase.notFound => Center(
          child: SingleChildScrollView(
            child: EmptyStateIllustration(
              icon: Icons.search_off_rounded,
              title: '宠物不存在或已被删除',
              description: '档案可能已被移除，返回列表查看最新档案',
              ctaLabel: '返回列表',
              onCtaPressed: () {
                widget.controller.refresh();
                Navigator.of(context).pop();
              },
            ),
          ),
        ),
        _DetailPhase.ready => _content(_pet!),
      },
    );
  }

  Widget _content(Pet pet) {
    return ListView(
      padding: const EdgeInsets.fromLTRB(16, 0, 16, 30),
      children: [
        Column(
          children: [
            // T3.5-09：头像展示真实预签名 URL（无图回退爪印占位）；铅笔角标
            // 自此有功能——接 MediaUploader 上传 pet_avatar，WRITE 档可见。
            PetAvatar(
              size: PetAvatarSize.xl,
              url: pet.avatarUrl,
              showEditBadge: _canEditAvatar,
              onTap: _canEditAvatar ? _onAvatarTap : null,
              semanticLabel: _canEditAvatar ? '更换宠物头像' : null,
            ),
            const SizedBox(height: 12),
            Text(pet.name, style: Theme.of(context).textTheme.headlineSmall),
            const SizedBox(height: 4),
            Text(
              petMetaLine(pet),
              style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
            ),
            if (pet.status != PetStatus.active) ...[
              const SizedBox(height: 8),
              TagPill(
                petStatusLabel(pet.status),
                color: pet.status == PetStatus.lost
                    ? AppColors.error
                    : AppColors.muted,
              ),
            ],
          ],
        ),
        const SizedBox(height: 24),
        Text('健康数据', style: Theme.of(context).textTheme.titleLarge),
        const SizedBox(height: 10),
        _summarySection(pet),
        const SizedBox(height: 16),
        _recordsSection(pet),
        const SizedBox(height: 24),
        Text('基本资料', style: Theme.of(context).textTheme.titleLarge),
        const SizedBox(height: 10),
        SectionCard(
          child: Column(
            children: [
              _InfoRow(label: '物种', value: petSpeciesLabel(pet.species)),
              const _RowDivider(),
              _InfoRow(label: '品种', value: petBreedLabel(pet)),
              const _RowDivider(),
              _InfoRow(label: '性别', value: petSexLabel(pet.sex)),
              const _RowDivider(),
              _InfoRow(
                label: '生日',
                value: pet.birthDate == null
                    ? '未填写'
                    : dateToJson(pet.birthDate!) +
                          (pet.birthDateEstimated ? '（估算）' : ''),
              ),
              const _RowDivider(),
              _InfoRow(label: '芯片号', value: pet.microchipNo ?? '未填写'),
              const _RowDivider(),
              _InfoRow(label: '性格', value: pet.personality ?? '未填写'),
              const _RowDivider(),
              _InfoRow(
                label: '绝育日期',
                value: pet.sterilizedOn == null
                    ? '未填写'
                    : dateToJson(pet.sterilizedOn!),
              ),
            ],
          ),
        ),
        if (_canEdit) ...[
          const SizedBox(height: 16),
          OutlinedButton.icon(
            onPressed: _openEdit,
            icon: const Icon(Icons.edit_outlined, size: 17),
            label: const Text('编辑资料'),
          ),
        ],
      ],
    );
  }

  /// 记录导航区：健康时间线与照护提醒入口（T2-14）。待办提醒非空时
  /// 上方渲染真实数据驱动的「健康提醒」卡（正典 alert-card 形态，
  /// 取代 demo 硬编码文案），点卡与点入口同去提醒页。
  Widget _recordsSection(Pet pet) {
    final nearest = _pendingReminders.isEmpty ? null : _pendingReminders.first;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        if (nearest != null) ...[
          _ReminderAlertCard(
            reminder: nearest,
            overdue: isReminderOverdue(nearest, DateTime.now()),
            onTap: () => _openReminders(pet),
          ),
          const SizedBox(height: 10),
        ],
        SectionCard(
          padding: EdgeInsets.zero,
          child: Column(
            children: [
              ListTile(
                leading: const Icon(
                  Icons.event_note_outlined,
                  color: AppColors.inkSoft,
                ),
                title: const Text('健康时间线', style: TextStyle(fontSize: 14)),
                subtitle: const Text(
                  '就医 · 喂养 · 驱虫 · 洗护 · 测量 · 随手记',
                  style: TextStyle(color: AppColors.inkSoft, fontSize: 12),
                ),
                trailing: const Icon(
                  Icons.chevron_right,
                  color: AppColors.muted,
                ),
                onTap: () => _openTimeline(pet),
              ),
              const Divider(height: 1, thickness: 1, color: AppColors.border),
              ListTile(
                leading: const Icon(
                  Icons.notifications_outlined,
                  color: AppColors.inkSoft,
                ),
                title: const Text('照护提醒', style: TextStyle(fontSize: 14)),
                subtitle: Text(
                  switch (_remindersPhase) {
                    _RemindersPhase.loading => '加载中…',
                    _RemindersPhase.error => '提醒加载失败，点击查看',
                    _RemindersPhase.ready when _pendingReminders.isEmpty =>
                      '暂无待办提醒',
                    _RemindersPhase.ready => '${_pendingReminders.length} 条待办',
                  },
                  style: const TextStyle(
                    color: AppColors.inkSoft,
                    fontSize: 12,
                  ),
                ),
                trailing: const Icon(
                  Icons.chevron_right,
                  color: AppColors.muted,
                ),
                onTap: () => _openReminders(pet),
              ),
            ],
          ),
        ),
      ],
    );
  }

  /// 数据卡行（05 §4.2 stat-row）：四卡取数全部来自 summary 实时聚合，
  /// 不落任何本地展示字符串（第 4.3 节红线）。null 语义 → 空态文案。
  Widget _summarySection(Pet pet) {
    switch (_summaryPhase) {
      case _SummaryPhase.loading:
        return const SizedBox(
          height: 86,
          child: Center(
            child: SizedBox(
              width: 22,
              height: 22,
              child: CircularProgressIndicator(strokeWidth: 2),
            ),
          ),
        );
      case _SummaryPhase.error:
        return Row(
          children: [
            const Expanded(
              child: Text(
                '健康数据加载失败',
                style: TextStyle(color: AppColors.error, fontSize: 12),
              ),
            ),
            TextButton(onPressed: _loadSummary, child: const Text('重试')),
          ],
        );
      case _SummaryPhase.ready:
        final summary = _summary!;
        final weight = summary.latestWeight;
        final progress = summary.vaccinationProgress;
        final next = summary.nextVaccination;
        final expense = summary.monthlyExpense;
        return IntrinsicHeight(
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Expanded(
                child: _SummaryCard(
                  icon: recordTypeStyles[RecordType.weight]!.icon,
                  iconColor: recordTypeStyles[RecordType.weight]!.iconColor,
                  value: weight == null
                      ? '暂无记录'
                      : '${formatWeightKg(weight.weightKg)} kg',
                  emphasized: weight != null,
                  label: '最新体重',
                  onTap: () => _openWeights(pet),
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: _SummaryCard(
                  icon: recordTypeStyles[RecordType.vaccine]!.icon,
                  iconColor: recordTypeStyles[RecordType.vaccine]!.iconColor,
                  // 契约：totalDoses=0 → 整体 null（不是 0/0）→ 空态文案。
                  value: progress == null
                      ? '未登记'
                      : '${vaccinationProgressLabel(progress)} 针',
                  emphasized: progress != null,
                  label: '疫苗进度',
                  onTap: () => _openVaccinations(pet),
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: _SummaryCard(
                  icon: recordTypeStyles[RecordType.vaccine]!.icon,
                  iconColor: recordTypeStyles[RecordType.vaccine]!.iconColor,
                  value: next == null ? '暂无安排' : dateToJson(next.dueOn),
                  emphasized: next != null,
                  label: next == null ? '下一针' : '下一针·${next.vaccineName}',
                  onTap: () => _openVaccinations(pet),
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: _SummaryCard(
                  icon: Icons.payments_outlined,
                  iconColor: AppColors.primaryStrong,
                  // monthlyExpense 恒非 null（契约）；金额整数分 → 元展示。
                  value: '¥${formatCentsAsYuan(expense.amountCents)}',
                  emphasized: expense.amountCents > 0,
                  // M3.5-03：标签展示服务端归月的实际月份（此前硬编码
                  // 「本月花费」，用户无法自证记录落在哪个月）。
                  label: monthlyExpenseCardLabel(expense.month),
                  onTap: () => _openTimeline(pet),
                ),
              ),
            ],
          ),
        );
    }
  }
}

/// 数据卡（正典 stat-card 形态）：图标 + 数值 15/w800 + 标签 12 inkSoft；
/// 空态数值降级 inkSoft 常规字重（区分「有数据」与「空态」两种视觉）。
///
/// M3.5-03：可点卡（[onTap] 非空）右上角补 `chevron_right`——四张卡本都可点进
/// 明细页，但此前无任何视觉提示，用户实测反馈不知道能点。提示形态沿用项目
/// 既有可点行/卡（宠物列表卡、健康提醒卡、资料页设置行）的 `chevron_right`，
/// 不自创。同时 [MergeSemantics] 把「数值 + 标签」并进 InkWell 的 button 节点，
/// 读屏一次读全「¥0，9 月花费，按钮」，而不是两段孤立文字（tap 动作仍在
/// InkWell 上，不用 `excludeSemantics` 以免连带丢掉可激活性）。
class _SummaryCard extends StatelessWidget {
  const _SummaryCard({
    required this.icon,
    required this.iconColor,
    required this.value,
    required this.label,
    required this.emphasized,
    this.onTap,
  });

  final IconData icon;
  final Color iconColor;
  final String value;
  final String label;
  final bool emphasized;
  final VoidCallback? onTap;

  @override
  Widget build(BuildContext context) {
    return MergeSemantics(
      child: Card(
        child: InkWell(
          onTap: onTap,
          borderRadius: BorderRadius.circular(AppRadius.xl),
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 12),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Icon(icon, size: 18, color: iconColor),
                    const Spacer(),
                    if (onTap != null)
                      const Icon(
                        Icons.chevron_right,
                        size: 16,
                        color: AppColors.muted,
                      ),
                  ],
                ),
                const SizedBox(height: 8),
                Text(
                  value,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: TextStyle(
                    color: emphasized ? AppColors.ink : AppColors.inkSoft,
                    fontSize: emphasized ? 15 : 13,
                    fontWeight: emphasized ? FontWeight.w800 : FontWeight.w600,
                  ),
                ),
                const SizedBox(height: 4),
                Text(
                  label,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(
                    color: AppColors.inkSoft,
                    fontSize: 11,
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

/// 键值行（05 §4.3 P3 风格：字段名 12 inkSoft / 值 bodyMedium ink）。
class _InfoRow extends StatelessWidget {
  const _InfoRow({required this.label, required this.value});

  final String label;
  final String value;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 7),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 72,
            child: Text(
              label,
              style: const TextStyle(color: AppColors.inkSoft, fontSize: 12),
            ),
          ),
          Expanded(
            child: Text(value, style: Theme.of(context).textTheme.bodyMedium),
          ),
        ],
      ),
    );
  }
}

class _RowDivider extends StatelessWidget {
  const _RowDivider();

  @override
  Widget build(BuildContext context) {
    return const Divider(height: 1, thickness: 1, color: AppColors.border);
  }
}

/// 「健康提醒」卡（正典 alert-card：successSurface 底 + dot + 文字）：
/// 数据源为最近到期的待办提醒（真实数据驱动，取代 demo 硬编码文案）；
/// 逾期时文案切警示深色（双通道：前缀文字 + 颜色）。
class _ReminderAlertCard extends StatelessWidget {
  const _ReminderAlertCard({
    required this.reminder,
    required this.overdue,
    this.onTap,
  });

  final CareReminder reminder;
  final bool overdue;
  final VoidCallback? onTap;

  @override
  Widget build(BuildContext context) {
    final textColor = overdue ? AppColors.errorDark : AppColors.successInk;
    return Material(
      color: AppColors.successSurface,
      borderRadius: BorderRadius.circular(AppRadius.lg),
      child: InkWell(
        onTap: onTap,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        child: Padding(
          padding: const EdgeInsets.all(14),
          child: Row(
            children: [
              Container(
                width: 8,
                height: 8,
                decoration: BoxDecoration(
                  shape: BoxShape.circle,
                  color: textColor,
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: Text(
                  '健康提醒：${reminder.title}'
                  '（${overdue ? '已逾期' : '${dateToJson(reminder.dueAt.toLocal())} 到期'}）',
                  maxLines: 2,
                  overflow: TextOverflow.ellipsis,
                  style: TextStyle(
                    color: textColor,
                    fontSize: 12,
                    fontWeight: FontWeight.w600,
                  ),
                ),
              ),
              const SizedBox(width: 8),
              Icon(Icons.chevron_right, size: 18, color: textColor),
            ],
          ),
        ),
      ),
    );
  }
}