import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:package_info_plus/package_info_plus.dart';
import '../../../../core/theme/app_colors.dart';
import '../../../../core/updater/update_service.dart';
import '../../../auth/data/providers/auth_provider.dart';
import '../../../agent_call/presentation/pages/voice_test_page.dart';
import '../../../settings/presentation/providers/settings_providers.dart';

// ---------------------------------------------------------------------------
// Profile page — "我" Tab
// A slimmer version of SettingsPage, always accessible as a Tab.
// Billing is linked as a prominent row at the top.
// ---------------------------------------------------------------------------

class ProfilePage extends ConsumerStatefulWidget {
  const ProfilePage({super.key});

  @override
  ConsumerState<ProfilePage> createState() => _ProfilePageState();
}

class _ProfilePageState extends ConsumerState<ProfilePage> {
  String _appVersion = '';

  @override
  void initState() {
    super.initState();
    Future.microtask(
        () => ref.read(accountProfileProvider.notifier).loadProfile());
    _loadVersion();
  }

  Future<void> _loadVersion() async {
    final info = await PackageInfo.fromPlatform();
    if (mounted) {
      setState(() => _appVersion = 'v${info.version}+${info.buildNumber}');
    }
  }

  @override
  Widget build(BuildContext context) {
    final settings = ref.watch(settingsProvider);
    final profile = ref.watch(accountProfileProvider);
    final isDark = Theme.of(context).brightness == Brightness.dark;
    final cardColor = isDark ? AppColors.surface : Colors.white;
    final subtitleColor =
        isDark ? AppColors.textSecondary : Colors.grey[600];

    return Scaffold(
      backgroundColor: AppColors.background,
      appBar: AppBar(
        backgroundColor: AppColors.background,
        title: const Text('我'),
      ),
      body: ListView(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
        children: [
          // ── Profile card ────────────────────────────────────────────
          _buildProfileCard(profile, cardColor, subtitleColor),
          const SizedBox(height: 20),

          // ── Billing (prominent) ─────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              _SettingsRow(
                icon: Icons.workspace_premium_outlined,
                iconBg: const Color(0xFF10B981),
                title: '订阅套餐与用量',
                trailing: Text(
                  'Free',
                  style: TextStyle(color: subtitleColor, fontSize: 14),
                ),
                onTap: () => context.push('/billing'),
              ),
            ],
          ),
          const SizedBox(height: 20),

          // ── General ─────────────────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              _SettingsRow(
                icon: Icons.palette_outlined,
                iconBg: const Color(0xFF6366F1),
                title: '外观主题',
                trailing: _ThemeLabel(mode: settings.themeMode),
                onTap: () => _showThemePicker(settings.themeMode),
              ),
              _SettingsRow(
                icon: Icons.language,
                iconBg: const Color(0xFF3B82F6),
                title: '语言',
                trailing: Text('简体中文',
                    style: TextStyle(color: subtitleColor, fontSize: 14)),
              ),
            ],
          ),
          const SizedBox(height: 20),

          // ── Voice / Engine ───────────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              // [HIDDEN] 对话引擎选择（Claude API vs Agent SDK）
              // 产品决策：引擎切换属于平台级配置，普通用户无需感知，暂不在"我"页面暴露。
              // 如需恢复显示，删除 `if (false)` 即可。
              if (false) _SettingsRow(
                icon: Icons.psychology,
                iconBg: const Color(0xFF7C3AED),
                title: '对话引擎',
                trailing: Text(
                  settings.engineType == 'claude_agent_sdk'
                      ? 'Agent SDK'
                      : 'Claude API',
                  style: TextStyle(color: subtitleColor, fontSize: 14),
                ),
                onTap: () => _showEngineTypePicker(settings.engineType),
              ),
              _SettingsRow(
                icon: Icons.record_voice_over,
                iconBg: const Color(0xFF0EA5E9),
                title: '语音音色',
                trailing: Text(
                  _voiceDisplayLabel(settings.ttsVoice),
                  style: TextStyle(color: subtitleColor, fontSize: 14),
                ),
                onTap: () => _showVoicePicker(settings.ttsVoice),
              ),
              _SettingsRow(
                icon: Icons.tune,
                iconBg: const Color(0xFFF97316),
                title: '语音风格',
                trailing: Text(
                  _styleDisplayName(settings.ttsStyle),
                  style: TextStyle(color: subtitleColor, fontSize: 14),
                ),
                onTap: () => _showStylePicker(settings.ttsStyle),
              ),
            ],
          ),
          const SizedBox(height: 20),

          // ── Notifications ────────────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              _SettingsToggleRow(
                icon: Icons.notifications_outlined,
                iconBg: const Color(0xFFEF4444),
                title: '推送通知',
                value: settings.notificationsEnabled,
                onChanged: (v) => ref
                    .read(settingsProvider.notifier)
                    .setNotificationsEnabled(v),
              ),
              _SettingsToggleRow(
                icon: Icons.volume_up_outlined,
                iconBg: const Color(0xFFF59E0B),
                title: '提示音',
                value: settings.soundEnabled,
                onChanged: settings.notificationsEnabled
                    ? (v) =>
                        ref.read(settingsProvider.notifier).setSoundEnabled(v)
                    : null,
              ),
            ],
          ),
          const SizedBox(height: 20),

          // ── Security ────────────────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              _SettingsRow(
                icon: Icons.lock_outline,
                iconBg: const Color(0xFF8B5CF6),
                title: '修改密码',
                onTap: _showChangePasswordSheet,
              ),
            ],
          ),
          const SizedBox(height: 20),

          // ── About / Dev ──────────────────────────────────────────────
          _SettingsGroup(
            cardColor: cardColor,
            children: [
              _SettingsRow(
                icon: Icons.info_outline,
                iconBg: const Color(0xFF64748B),
                title: '版本',
                trailing: Text(
                  _appVersion.isNotEmpty ? _appVersion : 'v1.0.0',
                  style: TextStyle(color: subtitleColor, fontSize: 14),
                ),
              ),
              // [HIDDEN] 检查更新
              // 产品决策：更新检查在 App 启动时已后台静默运行（UpdateService.silentCheck），
              // 无需在"我"页面额外入口。如需恢复，删除 `if (false)` 即可。
              if (false) _SettingsRow(
                icon: Icons.system_update_outlined,
                iconBg: const Color(0xFF22C55E),
                title: '检查更新',
                onTap: () => UpdateService().manualCheckUpdate(context),
              ),
              // [HIDDEN] 语音 I/O 测试（TTS / STT）
              // 产品决策：仅供开发调试使用，正式版不对普通用户展示。
              // 调试时可删除 `if (false)` 临时开启；VoiceTestPage 代码及路由均保留。
              if (false) _SettingsRow(
                icon: Icons.record_voice_over,
                iconBg: const Color(0xFF10B981),
                title: '语音 I/O 测试',
                trailing: Text('TTS / STT',
                    style: TextStyle(color: subtitleColor, fontSize: 14)),
                onTap: () => Navigator.push(
                  context,
                  MaterialPageRoute(builder: (_) => const VoiceTestPage()),
                ),
              ),
              if (settings.selectedTenantName != null)
                _SettingsRow(
                  icon: Icons.business_outlined,
                  iconBg: const Color(0xFF0EA5E9),
                  title: '租户',
                  trailing: Text(settings.selectedTenantName!,
                      style: TextStyle(color: subtitleColor, fontSize: 14)),
                ),
            ],
          ),
          const SizedBox(height: 24),

          // ── Logout ──────────────────────────────────────────────────
          SizedBox(
            width: double.infinity,
            child: OutlinedButton(
              onPressed: _confirmLogout,
              style: OutlinedButton.styleFrom(
                foregroundColor: AppColors.error,
                side: const BorderSide(color: AppColors.error),
                padding: const EdgeInsets.symmetric(vertical: 14),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
              child: const Text('退出登录',
                  style: TextStyle(fontSize: 16)),
            ),
          ),
          const SizedBox(height: 48),
        ],
      ),
    );
  }

  // ── Profile card ──────────────────────────────────────────────────────────

  Widget _buildProfileCard(
      AccountProfile profile, Color cardColor, Color? subtitleColor) {
    final initial = profile.displayName.isNotEmpty
        ? profile.displayName[0].toUpperCase()
        : '?';

    return Card(
      color: cardColor,
      elevation: 0,
      shape:
          RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
      child: InkWell(
        borderRadius: BorderRadius.circular(16),
        onTap: () => _showEditNameDialog(profile.displayName),
        child: Padding(
          padding: const EdgeInsets.all(20),
          child: Row(
            children: [
              Container(
                width: 60,
                height: 60,
                decoration: BoxDecoration(
                  gradient: const LinearGradient(
                    colors: [Color(0xFF6366F1), Color(0xFF818CF8)],
                    begin: Alignment.topLeft,
                    end: Alignment.bottomRight,
                  ),
                  borderRadius: BorderRadius.circular(20),
                ),
                child: Center(
                  child: Text(
                    initial,
                    style: const TextStyle(
                      color: Colors.white,
                      fontSize: 24,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      profile.displayName.isNotEmpty
                          ? profile.displayName
                          : '加载中...',
                      style: const TextStyle(
                        fontWeight: FontWeight.w600,
                        fontSize: 18,
                        color: AppColors.textPrimary,
                      ),
                    ),
                    const SizedBox(height: 4),
                    Text(
                      profile.email.isNotEmpty ? profile.email : ' ',
                      style: TextStyle(
                          color: subtitleColor, fontSize: 14),
                    ),
                  ],
                ),
              ),
              Icon(Icons.chevron_right, color: subtitleColor),
            ],
          ),
        ),
      ),
    );
  }

  // ── Pickers ───────────────────────────────────────────────────────────────

  void _showThemePicker(ThemeMode current) {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (ctx) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            const SizedBox(height: 12),
            _handle(),
            const SizedBox(height: 12),
            Text('选择主题',
                style: Theme.of(ctx).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.w600,
                    )),
            const SizedBox(height: 8),
            _ThemeOption(
              icon: Icons.dark_mode,
              label: '深色模式',
              selected: current == ThemeMode.dark,
              onTap: () {
                ref
                    .read(settingsProvider.notifier)
                    .setThemeMode(ThemeMode.dark);
                Navigator.pop(ctx);
              },
            ),
            _ThemeOption(
              icon: Icons.light_mode,
              label: '浅色模式',
              selected: current == ThemeMode.light,
              onTap: () {
                ref
                    .read(settingsProvider.notifier)
                    .setThemeMode(ThemeMode.light);
                Navigator.pop(ctx);
              },
            ),
            _ThemeOption(
              icon: Icons.settings_brightness,
              label: '跟随系统',
              selected: current == ThemeMode.system,
              onTap: () {
                ref
                    .read(settingsProvider.notifier)
                    .setThemeMode(ThemeMode.system);
                Navigator.pop(ctx);
              },
            ),
            const SizedBox(height: 16),
          ],
        ),
      ),
    );
  }

  static const _voices = [
    ('coral', 'Coral', '女 · 温暖'),
    ('nova', 'Nova', '女 · 活泼'),
    ('sage', 'Sage', '女 · 知性'),
    ('shimmer', 'Shimmer', '女 · 柔和'),
    ('ash', 'Ash', '男 · 沉稳'),
    ('echo', 'Echo', '男 · 清朗'),
    ('onyx', 'Onyx', '男 · 低沉'),
    ('alloy', 'Alloy', '中性'),
  ];

  String _voiceDisplayLabel(String voice) {
    for (final v in _voices) {
      if (v.$1 == voice) return '${v.$2} · ${v.$3}';
    }
    return voice.isNotEmpty
        ? voice[0].toUpperCase() + voice.substring(1)
        : 'Coral';
  }

  void _showVoicePicker(String current) {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (ctx) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            const SizedBox(height: 12),
            _handle(),
            const SizedBox(height: 12),
            Text('选择语音音色',
                style: Theme.of(ctx).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.w600,
                    )),
            const SizedBox(height: 8),
            Flexible(
              child: ListView(
                shrinkWrap: true,
                children: _voices
                    .map((v) => ListTile(
                          leading: Icon(Icons.record_voice_over,
                              color: current == v.$1
                                  ? AppColors.primary
                                  : null),
                          title: Text(v.$2,
                              style: TextStyle(
                                fontWeight: current == v.$1
                                    ? FontWeight.w600
                                    : FontWeight.normal,
                                color: current == v.$1
                                    ? AppColors.primary
                                    : null,
                              )),
                          subtitle: Text(v.$3,
                              style: const TextStyle(fontSize: 12)),
                          trailing: current == v.$1
                              ? const Icon(Icons.check_circle,
                                  color: AppColors.primary)
                              : null,
                          onTap: () {
                            ref
                                .read(settingsProvider.notifier)
                                .setTtsVoice(v.$1);
                            Navigator.pop(ctx);
                          },
                        ))
                    .toList(),
              ),
            ),
            const SizedBox(height: 16),
          ],
        ),
      ),
    );
  }

  static const _engines = [
    ('claude_agent_sdk', 'Agent SDK', '支持工具审批、技能注入、会话恢复'),
    ('claude_api', 'Claude API', '直连 API，响应更快'),
  ];

  void _showEngineTypePicker(String current) {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (ctx) => Padding(
        padding: const EdgeInsets.symmetric(vertical: 16),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            _handle(),
            const SizedBox(height: 12),
            Text('选择对话引擎',
                style: Theme.of(ctx).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.w600,
                    )),
            const SizedBox(height: 8),
            ..._engines.map((e) => ListTile(
                  leading: Icon(
                    e.$1 == 'claude_agent_sdk'
                        ? Icons.psychology
                        : Icons.api,
                    color: e.$1 == current ? AppColors.primary : null,
                  ),
                  title: Text(e.$2,
                      style: TextStyle(
                        fontWeight: e.$1 == current
                            ? FontWeight.bold
                            : FontWeight.normal,
                        color: e.$1 == current ? AppColors.primary : null,
                      )),
                  subtitle:
                      Text(e.$3, style: const TextStyle(fontSize: 12)),
                  trailing: e.$1 == current
                      ? const Icon(Icons.check_circle,
                          color: AppColors.primary)
                      : null,
                  onTap: () {
                    ref
                        .read(settingsProvider.notifier)
                        .setEngineType(e.$1);
                    Navigator.pop(ctx);
                  },
                )),
          ],
        ),
      ),
    );
  }

  static const _stylePresets = [
    ('专业干练', '用专业、简洁、干练的语气说话，不拖泥带水。'),
    ('温柔耐心', '用温柔、耐心的语气说话，像一个贴心的朋友。'),
    ('轻松活泼', '用轻松、活泼的语气说话，带一点幽默感。'),
    ('严肃正式', '用严肃、正式的语气说话，像在正式会议中发言。'),
    ('科幻AI', '用科幻电影中AI的语气说话，冷静、理性、略带未来感。'),
  ];

  String _styleDisplayName(String style) {
    if (style.isEmpty) return '默认';
    for (final p in _stylePresets) {
      if (p.$2 == style) return p.$1;
    }
    return style.length > 6 ? '${style.substring(0, 6)}...' : style;
  }

  void _showStylePicker(String current) {
    final controller = TextEditingController(
      text: _stylePresets.any((p) => p.$2 == current) ? '' : current,
    );
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (ctx) => Padding(
        padding: EdgeInsets.fromLTRB(
            24, 24, 24, MediaQuery.of(ctx).viewInsets.bottom + 24),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            _handle(),
            const SizedBox(height: 12),
            Text('选择语音风格',
                style: Theme.of(ctx).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.w600,
                    )),
            const SizedBox(height: 12),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              children: _stylePresets
                  .map((p) => ChoiceChip(
                        label: Text(p.$1),
                        selected: current == p.$2,
                        onSelected: (_) {
                          ref
                              .read(settingsProvider.notifier)
                              .setTtsStyle(p.$2);
                          Navigator.pop(ctx);
                        },
                      ))
                  .toList(),
            ),
            const SizedBox(height: 12),
            TextField(
              controller: controller,
              decoration: InputDecoration(
                labelText: '自定义风格',
                hintText: '例如：用东北话说话，幽默风趣',
                border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
              maxLines: 2,
            ),
            const SizedBox(height: 12),
            Row(
              children: [
                Expanded(
                  child: TextButton(
                    onPressed: () {
                      ref
                          .read(settingsProvider.notifier)
                          .setTtsStyle('');
                      Navigator.pop(ctx);
                    },
                    child: const Text('恢复默认'),
                  ),
                ),
                const SizedBox(width: 12),
                Expanded(
                  child: FilledButton(
                    onPressed: () {
                      final text = controller.text.trim();
                      if (text.isNotEmpty) {
                        ref
                            .read(settingsProvider.notifier)
                            .setTtsStyle(text);
                      }
                      Navigator.pop(ctx);
                    },
                    child: const Text('确认'),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  void _showEditNameDialog(String currentName) {
    final controller = TextEditingController(text: currentName);
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        shape:
            RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
        title: const Text('修改显示名称'),
        content: TextField(
          controller: controller,
          autofocus: true,
          decoration: InputDecoration(
            labelText: '显示名称',
            border: OutlineInputBorder(
                borderRadius: BorderRadius.circular(12)),
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(),
            child: const Text('取消'),
          ),
          FilledButton(
            onPressed: () async {
              final name = controller.text.trim();
              if (name.isEmpty) return;
              Navigator.of(ctx).pop();
              final success = await ref
                  .read(accountProfileProvider.notifier)
                  .updateDisplayName(name);
              if (mounted) {
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(
                      content: Text(success ? '名称已更新' : '更新失败')),
                );
              }
            },
            child: const Text('保存'),
          ),
        ],
      ),
    );
  }

  void _showChangePasswordSheet() {
    final currentCtrl = TextEditingController();
    final newCtrl = TextEditingController();
    final confirmCtrl = TextEditingController();

    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (ctx) => Padding(
        padding: EdgeInsets.fromLTRB(
            24, 24, 24, MediaQuery.of(ctx).viewInsets.bottom + 24),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            _handle(),
            const SizedBox(height: 12),
            Text('修改密码',
                style: Theme.of(ctx)
                    .textTheme
                    .titleLarge
                    ?.copyWith(fontWeight: FontWeight.w600)),
            const SizedBox(height: 20),
            TextField(
              controller: currentCtrl,
              obscureText: true,
              decoration: InputDecoration(
                labelText: '当前密码',
                prefixIcon: const Icon(Icons.lock_outline),
                border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
            ),
            const SizedBox(height: 14),
            TextField(
              controller: newCtrl,
              obscureText: true,
              decoration: InputDecoration(
                labelText: '新密码',
                prefixIcon: const Icon(Icons.lock_reset),
                border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
            ),
            const SizedBox(height: 14),
            TextField(
              controller: confirmCtrl,
              obscureText: true,
              decoration: InputDecoration(
                labelText: '确认新密码',
                prefixIcon: const Icon(Icons.lock_reset),
                border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
            ),
            const SizedBox(height: 20),
            FilledButton(
              style: FilledButton.styleFrom(
                padding: const EdgeInsets.symmetric(vertical: 14),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12)),
              ),
              onPressed: () async {
                if (newCtrl.text != confirmCtrl.text) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(content: Text('两次输入的密码不一致')),
                  );
                  return;
                }
                if (newCtrl.text.length < 6) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(content: Text('新密码至少6个字符')),
                  );
                  return;
                }
                Navigator.of(ctx).pop();
                final result = await ref
                    .read(accountProfileProvider.notifier)
                    .changePassword(
                      currentPassword: currentCtrl.text,
                      newPassword: newCtrl.text,
                    );
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(
                      content: Text(result.success
                          ? '密码已修改'
                          : result.message ?? '修改失败'),
                    ),
                  );
                }
              },
              child: const Text('确认修改', style: TextStyle(fontSize: 16)),
            ),
          ],
        ),
      ),
    );
  }

  void _confirmLogout() async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        shape:
            RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
        title: const Text('退出登录'),
        content: const Text('确定要退出登录吗？'),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(false),
            child: const Text('取消'),
          ),
          FilledButton(
            style:
                FilledButton.styleFrom(backgroundColor: AppColors.error),
            onPressed: () => Navigator.of(ctx).pop(true),
            child: const Text('退出'),
          ),
        ],
      ),
    );
    if (confirmed == true) {
      await ref.read(authStateProvider.notifier).logout();
      if (mounted) context.go('/login');
    }
  }

  Widget _handle() => Center(
        child: Container(
          width: 40,
          height: 4,
          decoration: BoxDecoration(
            color: Colors.grey[400],
            borderRadius: BorderRadius.circular(2),
          ),
        ),
      );
}

// =============================================================================
// Shared settings widgets (copied from settings_page to keep this file self-contained)
// =============================================================================

class _SettingsGroup extends StatelessWidget {
  final Color cardColor;
  final List<Widget> children;

  const _SettingsGroup(
      {required this.cardColor, required this.children});

  @override
  Widget build(BuildContext context) {
    return Card(
      color: cardColor,
      elevation: 0,
      shape:
          RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
      clipBehavior: Clip.antiAlias,
      child: Column(
        children: [
          for (int i = 0; i < children.length; i++) ...[
            children[i],
            if (i < children.length - 1)
              Divider(
                height: 1,
                indent: 56,
                color: Theme.of(context).dividerColor.withAlpha(80),
              ),
          ],
        ],
      ),
    );
  }
}

class _SettingsRow extends StatelessWidget {
  final IconData icon;
  final Color iconBg;
  final String title;
  final Widget? trailing;
  final VoidCallback? onTap;

  const _SettingsRow({
    required this.icon,
    required this.iconBg,
    required this.title,
    this.trailing,
    this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Container(
        width: 32,
        height: 32,
        decoration: BoxDecoration(
          color: iconBg,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Icon(icon, color: Colors.white, size: 18),
      ),
      title: Text(title),
      trailing: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          if (trailing != null) trailing!,
          if (onTap != null) ...[
            const SizedBox(width: 4),
            Icon(Icons.chevron_right,
                size: 20,
                color: Theme.of(context).hintColor),
          ],
        ],
      ),
      onTap: onTap,
    );
  }
}

class _SettingsToggleRow extends StatelessWidget {
  final IconData icon;
  final Color iconBg;
  final String title;
  final bool value;
  final ValueChanged<bool>? onChanged;

  const _SettingsToggleRow({
    required this.icon,
    required this.iconBg,
    required this.title,
    required this.value,
    this.onChanged,
  });

  @override
  Widget build(BuildContext context) {
    return SwitchListTile(
      secondary: Container(
        width: 32,
        height: 32,
        decoration: BoxDecoration(
          color: iconBg,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Icon(icon, color: Colors.white, size: 18),
      ),
      title: Text(title),
      value: value,
      onChanged: onChanged,
    );
  }
}

class _ThemeLabel extends StatelessWidget {
  final ThemeMode mode;
  const _ThemeLabel({required this.mode});

  @override
  Widget build(BuildContext context) {
    final label = switch (mode) {
      ThemeMode.dark => '深色',
      ThemeMode.light => '浅色',
      ThemeMode.system => '跟随系统',
    };
    return Text(label,
        style: TextStyle(
            color: Theme.of(context).hintColor, fontSize: 14));
  }
}

class _ThemeOption extends StatelessWidget {
  final IconData icon;
  final String label;
  final bool selected;
  final VoidCallback onTap;

  const _ThemeOption({
    required this.icon,
    required this.label,
    required this.selected,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Icon(icon,
          color: selected
              ? Theme.of(context).colorScheme.primary
              : null),
      title: Text(label,
          style: TextStyle(
            fontWeight:
                selected ? FontWeight.w600 : FontWeight.normal,
            color: selected
                ? Theme.of(context).colorScheme.primary
                : null,
          )),
      trailing: selected
          ? Icon(Icons.check_circle,
              color: Theme.of(context).colorScheme.primary)
          : null,
      onTap: onTap,
    );
  }
}