import Link from "next/link";
import { Shield, Users, BookOpen, Settings, BarChart3, ClipboardList, HardDrive, Bot, ArrowLeft, Gauge, Mail, Flag, History, LifeBuoy, TrendingUp, Webhook, CreditCard, Tag } from "lucide-react";
import { cn } from "@/lib/utils";
import { getStaffRole } from "@/lib/require-admin-page";
import { redirect } from "next/navigation";

// adminOnly items are hidden from moderators (and, redundantly but safely,
// each of those pages also redirects moderators away server-side via
// requireFullAdminPage — the nav filter here is UX, not the real gate).
const adminNav = [
  { href: "/admin", label: "Overview", icon: BarChart3, adminOnly: true },
  { href: "/admin/insights", label: "Insights", icon: TrendingUp, adminOnly: true },
  { href: "/admin/users", label: "Users", icon: Users, adminOnly: true },
  { href: "/admin/invites", label: "Invites", icon: Mail, adminOnly: true },
  { href: "/admin/recipes", label: "Recipes", icon: BookOpen, adminOnly: false },
  { href: "/admin/reports", label: "Reports", icon: Flag, adminOnly: false },
  { href: "/admin/support", label: "Support", icon: LifeBuoy, adminOnly: true },
  { href: "/admin/tiers", label: "Tier Limits", icon: Gauge, adminOnly: true },
  { href: "/admin/ingredients", label: "Ingredients", icon: Tag, adminOnly: true },
  { href: "/admin/billing", label: "Billing", icon: CreditCard, adminOnly: true },
  { href: "/admin/webhooks", label: "Webhooks", icon: Webhook, adminOnly: true },
  { href: "/admin/audit-logs", label: "Audit Logs", icon: ClipboardList, adminOnly: true },
  { href: "/admin/storage", label: "Storage", icon: HardDrive, adminOnly: true },
  { href: "/admin/ai-config", label: "AI Config", icon: Bot, adminOnly: true },
  { href: "/admin/settings", label: "Settings", icon: Settings, adminOnly: true },
  { href: "/admin/changelog", label: "Changelog", icon: History, adminOnly: true },
];

export default async function AdminLayout({ children }: { children: React.ReactNode }) {
  const role = await getStaffRole();
  if (!role) redirect("/recipes");

  const visibleNav = role === "admin" ? adminNav : adminNav.filter((item) => !item.adminOnly);

  return (
    <div className="flex flex-col md:flex-row min-h-screen">
      <aside className="w-full md:w-56 md:shrink-0 border-b md:border-b-0 md:border-r bg-muted/30 flex flex-col md:sticky md:top-0 md:h-screen">
        <div className="flex items-center justify-between gap-2 p-4 border-b font-semibold">
          <span className="flex items-center gap-2">
            <Shield className="h-4 w-4 text-destructive" />
            {role === "admin" ? "Admin" : "Moderator"}
          </span>
          <Link
            href="/recipes"
            className="md:hidden flex items-center gap-1 text-xs font-normal text-muted-foreground hover:text-foreground"
          >
            <ArrowLeft className="h-3.5 w-3.5" />
            Back to app
          </Link>
        </div>
        <nav className="flex overflow-x-auto gap-1 p-2 md:flex-col md:overflow-visible md:flex-1 [scrollbar-width:none] [&::-webkit-scrollbar]:hidden">
          {visibleNav.map(({ href, label, icon: Icon }) => (
            <Link
              key={href}
              href={href}
              className={cn(
                "flex items-center gap-2 rounded-md px-3 py-2 text-sm whitespace-nowrap shrink-0 md:shrink transition-colors",
                "hover:bg-accent hover:text-accent-foreground"
              )}
            >
              <Icon className="h-4 w-4" />
              {label}
            </Link>
          ))}
        </nav>
        <div className="p-2 border-t hidden md:block">
          <Link
            href="/recipes"
            className="flex items-center gap-2 rounded-md px-3 py-2 text-sm text-muted-foreground hover:text-foreground hover:bg-accent transition-colors"
          >
            <ArrowLeft className="h-4 w-4" />
            Back to app
          </Link>
        </div>
      </aside>
      <main className="flex-1 p-4 md:p-8 overflow-auto min-w-0">{children}</main>
    </div>
  );
}
