import React, { ReactNode, useState, useEffect } from 'react';
import { Link, useLocation } from 'react-router-dom';
import { LayoutDashboard, ShoppingBag, Download, MapPin, Heart, User, LogOut, Key, Repeat } from 'lucide-react';
import { useModules } from '@/hooks/useModules';
import { api } from '@/lib/api/client';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from '@/components/ui/alert-dialog';

interface AccountLayoutProps {
  children: ReactNode;
}

export function AccountLayout({ children }: AccountLayoutProps) {
  const location = useLocation();
  const user = (window as any).woonoowCustomer?.user;
  const { isEnabled } = useModules();
  const wishlistEnabled = (window as any).woonoowCustomer?.settings?.wishlist_enabled !== false;
  const [isLoggingOut, setIsLoggingOut] = useState(false);
  const [avatarUrl, setAvatarUrl] = useState<string | null>(null);

  // Fetch avatar settings
  useEffect(() => {
    const fetchAvatar = async () => {
      try {
        const data = await api.get<{ current_avatar: string | null; gravatar_url: string }>('/account/avatar-settings');
        setAvatarUrl(data.current_avatar || data.gravatar_url);
      } catch (error) {
        console.error('Failed to fetch avatar:', error);
      }
    };
    fetchAvatar();

    // Listen for avatar updates
    const handleAvatarUpdate = (e: CustomEvent) => {
      setAvatarUrl(e.detail?.avatar_url || null);
    };
    window.addEventListener('woonoow:avatar-updated' as any, handleAvatarUpdate);
    return () => window.removeEventListener('woonoow:avatar-updated' as any, handleAvatarUpdate);
  }, []);

  const allMenuItems = [
    { id: 'dashboard', label: 'Dashboard', path: '/my-account', icon: LayoutDashboard },
    { id: 'orders', label: 'Orders', path: '/my-account/orders', icon: ShoppingBag },
    { id: 'subscriptions', label: 'Subscriptions', path: '/my-account/subscriptions', icon: Repeat },
    { id: 'licenses', label: 'Licenses', path: '/my-account/licenses', icon: Key },
    { id: 'downloads', label: 'Downloads', path: '/my-account/downloads', icon: Download },
    { id: 'addresses', label: 'Addresses', path: '/my-account/addresses', icon: MapPin },
    { id: 'account-details', label: 'Account Details', path: '/my-account/account-details', icon: User },
    { id: 'wishlist', label: 'Wishlist', path: '/my-account/wishlist', icon: Heart },
  ];

  // Filter out wishlist if module disabled or settings disabled, licenses if licensing disabled
  const menuItems = allMenuItems.filter(item => {
    if (item.id === 'wishlist') return isEnabled('wishlist') && wishlistEnabled;
    if (item.id === 'licenses') return isEnabled('licensing');
    if (item.id === 'subscriptions') return isEnabled('subscription');
    return true;
  });

  const handleLogout = async () => {
    setIsLoggingOut(true);
    try {
      const apiRoot = (window as any).woonoowCustomer?.apiRoot || '/wp-json/woonoow/v1';
      const nonce = (window as any).woonoowCustomer?.nonce || '';

      await fetch(`${apiRoot}/auth/logout`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'X-WP-Nonce': nonce,
        },
        credentials: 'include',
      });

      // Full page reload to clear cookies and refresh state
      const basePath = (window as any).woonoowCustomer?.basePath || '/store';
      window.location.href = window.location.origin + basePath + '/';
    } catch (error) {
      // Even on error, try to redirect and let server handle session
      const basePath = (window as any).woonoowCustomer?.basePath || '/store';
      window.location.href = window.location.origin + basePath + '/';
    }
  };

  const isActive = (path: string) => {
    if (path === '/my-account') {
      return location.pathname === '/my-account';
    }
    return location.pathname.startsWith(path);
  };

  // Logout Button with AlertDialog
  const LogoutButton = () => (
    <AlertDialog>
      <AlertDialogTrigger asChild>
        <button
          disabled={isLoggingOut}
          className="w-full font-[inherit] flex items-center gap-3 px-4 py-2.5 rounded-lg text-gray-700 hover:bg-gray-100 transition-colors disabled:opacity-50"
        >
          <LogOut className="w-5 h-5" />
          <span className="font-medium">{isLoggingOut ? 'Logging out...' : 'Logout'}</span>
        </button>
      </AlertDialogTrigger>
      <AlertDialogContent>
        <AlertDialogHeader>
          <AlertDialogTitle>Log out?</AlertDialogTitle>
          <AlertDialogDescription>
            Are you sure you want to log out of your account? You'll need to sign in again to access your orders and account details.
          </AlertDialogDescription>
        </AlertDialogHeader>
        <AlertDialogFooter>
          <AlertDialogCancel>Cancel</AlertDialogCancel>
          <AlertDialogAction
            onClick={handleLogout}
            className="bg-red-600 hover:bg-red-700 text-white"
          >
            Log Out
          </AlertDialogAction>
        </AlertDialogFooter>
      </AlertDialogContent>
    </AlertDialog>
  );

  // Sidebar Navigation
  const SidebarNav = () => (
    <aside className="bg-white rounded-lg border p-4">
      <div className="mb-6">
        <div className="flex items-center gap-3 pb-4 border-b">
          {avatarUrl ? (
            <img
              src={avatarUrl}
              alt={user?.display_name || 'User'}
              className="w-12 h-12 rounded-full object-cover"
            />
          ) : (
            <div className="w-12 h-12 rounded-full bg-gray-200 flex items-center justify-center">
              <User className="w-6 h-6 text-gray-600" />
            </div>
          )}
          <div>
            <p className="font-semibold">{user?.display_name || 'User'}</p>
            <p className="text-sm text-gray-500">{user?.email}</p>
          </div>
        </div>
      </div>

      <nav className="space-y-1">
        {menuItems.map((item) => {
          const Icon = item.icon;
          return (
            <Link
              key={item.id}
              to={item.path}
              className={`flex items-center gap-3 px-4 py-2.5 rounded-lg transition-colors ${isActive(item.path)
                ? 'bg-primary text-primary-foreground'
                : 'text-gray-700 hover:bg-gray-100'
                }`}
            >
              <Icon className="w-5 h-5" />
              <span className="font-medium">{item.label}</span>
            </Link>
          );
        })}

        <LogoutButton />
      </nav>
    </aside>
  );

  // Tab Navigation (Mobile)
  const TabNav = () => (
    <div className="bg-white rounded-lg border mb-6 lg:hidden">
      <nav className="flex overflow-x-auto">
        {menuItems.map((item) => {
          const Icon = item.icon;
          return (
            <Link
              key={item.id}
              to={item.path}
              className={`flex items-center gap-2 px-6 py-4 border-b-2 transition-colors whitespace-nowrap text-sm ${isActive(item.path)
                ? 'border-primary text-primary font-medium'
                : 'border-transparent text-gray-600 hover:text-gray-900'
                }`}
            >
              <Icon className="w-5 h-5" />
              <span>{item.label}</span>
            </Link>
          );
        })}
      </nav>
    </div>
  );

  // Responsive layout: Tabs on mobile, Sidebar on desktop
  return (
    <div className="py-8">
      {/* Mobile: Tab Navigation */}
      <TabNav />

      {/* Desktop: Sidebar + Content */}
      <div className="grid grid-cols-1 lg:grid-cols-4 gap-6">
        <div className="hidden lg:block lg:col-span-1">
          <SidebarNav />
        </div>
        <div className="lg:col-span-3">
          <div className="bg-white rounded-lg border p-6">
            {children}
          </div>
        </div>
      </div>
    </div>
  );
}