import React from 'react';
import { Navigate, useLocation } from 'react-router-dom';
import { useAuth } from '@/contexts/AuthContext';
import { usePermissions } from '@/hooks/usePermissions';
import { Permission } from '@/types/permissions';
import { Alert } from '@/components/ui';

export interface AdminRouteProps {
  children: React.ReactNode;
  permission?: Permission | Permission[];
  requireAll?: boolean;
  fallbackPath?: string;
}

/**
 * Route protection specifically for admin routes
 * Automatically checks for admin role and optional permissions
 */
export const AdminRoute = ({
  children,
  permission,
  requireAll = false,
  fallbackPath = '/',
}: AdminRouteProps) => {
  const { isAuthenticated, isLoading } = useAuth();
  const { isAdmin, checkAnyPermission, checkAllPermissions } = usePermissions();
  const location = useLocation();

  if (isLoading) {
    return (
      <div className="flex h-screen w-full items-center justify-center bg-background">
        <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary" />
      </div>
    );
  }

  if (!isAuthenticated) {
    return <Navigate to="/login" state={{ from: location }} replace />;
  }

  if (!isAdmin) {
    return (
      <div className="flex h-screen w-full items-center justify-center bg-background p-4">
        <Alert
          variant="error"
          title="Access Denied"
          description="You must be an administrator to access this page."
        />
      </div>
    );
  }

  // Check additional permissions if specified
  if (permission) {
    const permissions = Array.isArray(permission) ? permission : [permission];
    const hasAccess = requireAll
      ? checkAllPermissions(permissions)
      : checkAnyPermission(permissions);

    if (!hasAccess) {
      return (
        <div className="flex h-screen w-full items-center justify-center bg-background p-4">
          <Alert
            variant="error"
            title="Access Denied"
            description="You don't have the required permissions to access this page."
          />
        </div>
      );
    }
  }

  return <>{children}</>;
};

