import 'package:flutter/material.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import 'package:provider/provider.dart';
import '../../../core/theme/app_color_scheme.dart';
import '../../../core/theme/app_spacing.dart';
import '../../../providers/auth_provider.dart';
import '../../../providers/theme_provider.dart';
import '../auth/login_page.dart';

/// 菜单项数据模型
class _MenuItem {
  final IconData icon;
  final String title;
  final String? subtitle;
  final VoidCallback onTap;

  const _MenuItem({
    required this.icon,
    required this.title,
    this.subtitle,
    required this.onTap,
  });
}

/// 我的页面 - 使用 shadcn_ui 现代化设计
class MinePage extends StatefulWidget {
  const MinePage({super.key});

  @override
  State<MinePage> createState() => _MinePageState();
}

class _MinePageState extends State<MinePage> with AutomaticKeepAliveClientMixin {
  @override
  bool get wantKeepAlive => true;

  @override
  Widget build(BuildContext context) {
    super.build(context);

    return Scaffold(
      body: Consumer<AuthProvider>(
        builder: (context, auth, _) {
          return SingleChildScrollView(
            padding: AppSpacing.pagePadding,
            child: Column(
              children: [
                _UserCard(user: auth.user),
                SizedBox(height: AppSpacing.md),
                _MenuList(onShowComingSoon: _showComingSoon, onShowAbout: _showAboutDialog),
                SizedBox(height: AppSpacing.lg),
                _LogoutButton(onLogout: () => _handleLogout(auth)),
              ],
            ),
          );
        },
      ),
    );
  }

  void _showComingSoon(String feature) {
    showShadDialog(
      context: context,
      builder: (context) => ShadDialog.alert(
        title: Row(
          children: [
            const Icon(LucideIcons.construction, color: Color(0xFFFF9800), size: 20),
            SizedBox(width: AppSpacing.sm),
            const Text('功能开发中'),
          ],
        ),
        description: Text('$feature功能正在开发中，敬请期待~'),
        actions: [
          ShadButton(
            child: const Text('知道了'),
            onPressed: () => Navigator.of(context).pop(),
          ),
        ],
      ),
    );
  }

  void _showAboutDialog() {
    final theme = ShadTheme.of(context);

    showShadDialog(
      context: context,
      builder: (context) => ShadDialog(
        title: Row(
          children: [
            _AppLogo(radius: 20, fontSize: 20),
            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
            const Text('模拟所'),
          ],
        ),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('虚拟货币模拟交易平台', style: theme.textTheme.muted),
            SizedBox(height: AppSpacing.md),
            _InfoRow(icon: LucideIcons.code, text: '版本: 1.0.0'),
            SizedBox(height: AppSpacing.sm),
            const _InfoRow(icon: LucideIcons.heart, text: 'Built with Flutter & shadcn_ui'),
          ],
        ),
        actions: [
          ShadButton(
            child: const Text('确定'),
            onPressed: () => Navigator.of(context).pop(),
          ),
        ],
      ),
    );
  }

  void _handleLogout(AuthProvider auth) {
    showShadDialog(
      context: context,
      builder: (ctx) => ShadDialog.alert(
        title: const Text('确认退出'),
        description: const Text('确定要退出登录吗？'),
        actions: [
          ShadButton.outline(
            child: const Text('取消'),
            onPressed: () => Navigator.of(ctx).pop(),
          ),
          ShadButton.destructive(
            child: const Text('退出'),
            onPressed: () async {
              Navigator.of(ctx).pop();
              await auth.logout();
              if (ctx.mounted) {
                Navigator.of(ctx).pushAndRemoveUntil(
                  MaterialPageRoute(builder: (_) => const LoginPage()),
                  (route) => false,
                );
              }
            },
          ),
        ],
      ),
    );
  }
}

/// 用户卡片组件
class _UserCard extends StatelessWidget {
  final dynamic user;

  const _UserCard({required this.user});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return ShadCard(
      padding: EdgeInsets.all(AppSpacing.lg + AppSpacing.sm),
      child: Row(
        children: [
          _AppLogo(radius: 32, fontSize: 24, text: user?.avatarText),
          SizedBox(width: AppSpacing.md),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  user?.username ?? '未登录',
                  style: theme.textTheme.h3.copyWith(fontWeight: FontWeight.bold),
                ),
                SizedBox(height: AppSpacing.sm - AppSpacing.xs),
                ShadBadge(
                  backgroundColor: theme.colorScheme.primary.withValues(alpha: 0.2),
                  child: Text(
                    '普通用户',
                    style: TextStyle(fontSize: 12, color: theme.colorScheme.primary),
                  ),
                ),
              ],
            ),
          ),
          Icon(LucideIcons.chevronRight, color: theme.colorScheme.mutedForeground),
        ],
      ),
    );
  }
}

/// 应用 Logo 组件
class _AppLogo extends StatelessWidget {
  final double radius;
  final double fontSize;
  final String? text;

  const _AppLogo({required this.radius, required this.fontSize, this.text});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return CircleAvatar(
      radius: radius,
      backgroundColor: theme.colorScheme.primary.withValues(alpha: 0.2),
      child: Text(
        text ?? '₿',
        style: TextStyle(
          fontSize: fontSize,
          color: theme.colorScheme.primary,
          fontWeight: FontWeight.bold,
        ),
      ),
    );
  }
}

/// 信息行组件
class _InfoRow extends StatelessWidget {
  final IconData icon;
  final String text;

  const _InfoRow({required this.icon, required this.text});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return Row(
      children: [
        Icon(icon, size: 14, color: theme.colorScheme.mutedForeground),
        SizedBox(width: AppSpacing.sm - AppSpacing.xs),
        Text(text, style: theme.textTheme.muted.copyWith(fontSize: 12)),
      ],
    );
  }
}

/// 菜单列表组件
class _MenuList extends StatelessWidget {
  final void Function(String) onShowComingSoon;
  final VoidCallback onShowAbout;

  const _MenuList({required this.onShowComingSoon, required this.onShowAbout});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);
    final themeProvider = context.watch<ThemeProvider>();

    return ShadCard(
      padding: EdgeInsets.zero,
      child: Column(
        children: [
          // 主题切换开关（特殊处理）
          _ThemeToggleTile(isDarkMode: themeProvider.isDarkMode),
          Divider(color: theme.colorScheme.border, height: 1, indent: 56),
          // 普通菜单项
          for (var i = 0; i < _buildMenuItems().length; i++) ...[
            _MenuItemTile(item: _buildMenuItems()[i]),
            if (i < _buildMenuItems().length - 1)
              Divider(color: theme.colorScheme.border, height: 1, indent: 56),
          ],
        ],
      ),
    );
  }

  List<_MenuItem> _buildMenuItems() {
    return [
      _MenuItem(icon: LucideIcons.userCheck, title: '实名认证', subtitle: '完成实名认证，解锁更多功能', onTap: () => onShowComingSoon('实名认证')),
      _MenuItem(icon: LucideIcons.shield, title: '安全设置', subtitle: '密码、二次验证等安全设置', onTap: () => onShowComingSoon('安全设置')),
      _MenuItem(icon: LucideIcons.bell, title: '消息通知', subtitle: '管理消息推送设置', onTap: () => onShowComingSoon('消息通知')),
      _MenuItem(icon: LucideIcons.settings, title: '系统设置', subtitle: '主题、语言等偏好设置', onTap: () => onShowComingSoon('系统设置')),
      _MenuItem(icon: LucideIcons.info, title: '关于我们', subtitle: '版本信息与用户协议', onTap: onShowAbout),
    ];
  }
}

/// 主题切换组件
class _ThemeToggleTile extends StatelessWidget {
  final bool isDarkMode;

  const _ThemeToggleTile({required this.isDarkMode});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);
    final themeProvider = context.read<ThemeProvider>();

    return InkWell(
      onTap: () => themeProvider.toggleTheme(),
      child: Padding(
        padding: EdgeInsets.symmetric(horizontal: AppSpacing.md, vertical: AppSpacing.sm + AppSpacing.xs),
        child: Row(
          children: [
            _MenuIcon(icon: isDarkMode ? LucideIcons.moon : LucideIcons.sun),
            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text('深色模式', style: theme.textTheme.small.copyWith(fontWeight: FontWeight.w500)),
                  SizedBox(height: AppSpacing.xs / 2),
                  Text(
                    isDarkMode ? '当前：深色主题' : '当前：浅色主题',
                    style: theme.textTheme.muted.copyWith(fontSize: 11),
                  ),
                ],
              ),
            ),
            Switch(
              value: isDarkMode,
              onChanged: (_) => themeProvider.toggleTheme(),
              activeTrackColor: theme.colorScheme.primary.withValues(alpha: 0.5),
              activeColor: theme.colorScheme.primary,
            ),
          ],
        ),
      ),
    );
  }
}

/// 菜单项组件
class _MenuItemTile extends StatelessWidget {
  final _MenuItem item;

  const _MenuItemTile({required this.item});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return InkWell(
      onTap: item.onTap,
      child: Padding(
        padding: EdgeInsets.symmetric(horizontal: AppSpacing.md, vertical: AppSpacing.sm + AppSpacing.xs),
        child: Row(
          children: [
            _MenuIcon(icon: item.icon),
            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(item.title, style: theme.textTheme.small.copyWith(fontWeight: FontWeight.w500)),
                  if (item.subtitle != null) ...[
                    SizedBox(height: AppSpacing.xs / 2),
                    Text(item.subtitle!, style: theme.textTheme.muted.copyWith(fontSize: 11)),
                  ],
                ],
              ),
            ),
            Icon(LucideIcons.chevronRight, size: 18, color: theme.colorScheme.mutedForeground),
          ],
        ),
      ),
    );
  }
}

/// 菜单图标组件
class _MenuIcon extends StatelessWidget {
  final IconData icon;

  const _MenuIcon({required this.icon});

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return Container(
      width: 40,
      height: 40,
      decoration: BoxDecoration(
        color: theme.colorScheme.primary.withValues(alpha: 0.1),
        borderRadius: BorderRadius.circular(AppRadius.md + AppSpacing.xs),
      ),
      child: Icon(icon, size: 20, color: theme.colorScheme.primary),
    );
  }
}

/// 退出登录按钮
class _LogoutButton extends StatelessWidget {
  final VoidCallback onLogout;

  const _LogoutButton({required this.onLogout});

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: double.infinity,
      height: 48,
      child: ShadButton.destructive(
        onPressed: onLogout,
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Icon(LucideIcons.logOut, size: 18),
            SizedBox(width: AppSpacing.sm),
            const Text('退出登录', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
          ],
        ),
      ),
    );
  }
}