'use client';

import Link from 'next/link';
import { usePathname, useRouter } from 'next/navigation';
import { EDITABLE_SECTIONS } from '@/lib/content/sections';
import { cn } from '@/lib/utils';

export function AdminShell({ children }: { children: React.ReactNode }) {
  const pathname = usePathname();
  const router = useRouter();

  async function logout() {
    await fetch('/api/admin/logout', { method: 'POST' });
    router.replace('/admin/login');
    router.refresh();
  }

  return (
    <div dir="ltr" className="flex min-h-screen bg-base-900 text-slate-200">
      {/* Sidebar */}
      <aside className="hidden w-64 shrink-0 flex-col border-e border-white/8 bg-base-900/60 p-4 md:flex">
        <Link href="/admin" className="mb-6 flex items-center gap-2 px-2">
          <span className="grid h-8 w-8 place-items-center rounded-lg bg-electric/15 font-mono text-sm font-bold text-electric">
            SA
          </span>
          <span className="text-sm font-semibold text-white">Content CMS</span>
        </Link>

        <nav className="flex flex-col gap-0.5">
          <SideLink href="/admin" active={pathname === '/admin'}>
            Dashboard
          </SideLink>
          <div className="mt-3 px-3 pb-1 font-mono text-[0.6rem] uppercase tracking-wider text-slate-600">
            Sections
          </div>
          {EDITABLE_SECTIONS.map((s) => {
            const href = `/admin/sections/${s.key}`;
            return (
              <SideLink key={s.key} href={href} active={pathname === href}>
                {s.label.en}
              </SideLink>
            );
          })}
          <div className="mt-3 px-3 pb-1 font-mono text-[0.6rem] uppercase tracking-wider text-slate-600">
            Content
          </div>
          <SideLink href="/admin/posts" active={pathname.startsWith('/admin/posts')}>
            Journal articles
          </SideLink>
        </nav>

        <div className="mt-auto flex flex-col gap-1 pt-4">
          <a
            href="/"
            target="_blank"
            rel="noreferrer"
            className="rounded-lg px-3 py-2 text-sm text-slate-400 transition-colors hover:bg-white/[0.04] hover:text-white"
          >
            View site ↗
          </a>
          <button
            type="button"
            onClick={logout}
            className="rounded-lg px-3 py-2 text-start text-sm text-slate-400 transition-colors hover:bg-white/[0.04] hover:text-white"
          >
            Log out
          </button>
        </div>
      </aside>

      {/* Mobile top bar */}
      <div className="flex min-w-0 grow flex-col">
        <header className="flex items-center justify-between border-b border-white/8 px-5 py-3 md:hidden">
          <Link href="/admin" className="text-sm font-semibold text-white">
            Content CMS
          </Link>
          <button
            type="button"
            onClick={logout}
            className="text-sm text-slate-400 hover:text-white"
          >
            Log out
          </button>
        </header>

        {/* Mobile section selector */}
        <nav className="flex gap-2 overflow-x-auto border-b border-white/8 px-5 py-2 md:hidden">
          <MobileChip href="/admin" active={pathname === '/admin'} label="Dashboard" />
          {EDITABLE_SECTIONS.map((s) => (
            <MobileChip
              key={s.key}
              href={`/admin/sections/${s.key}`}
              active={pathname === `/admin/sections/${s.key}`}
              label={s.label.en}
            />
          ))}
          <MobileChip
            href="/admin/posts"
            active={pathname.startsWith('/admin/posts')}
            label="Articles"
          />
        </nav>

        <main className="grow px-6 py-6 sm:px-8">{children}</main>
      </div>
    </div>
  );
}

function SideLink({
  href,
  active,
  children,
}: {
  href: string;
  active: boolean;
  children: React.ReactNode;
}) {
  return (
    <Link
      href={href}
      className={cn(
        'rounded-lg px-3 py-2 text-sm transition-colors',
        active
          ? 'bg-electric/12 font-medium text-electric'
          : 'text-slate-400 hover:bg-white/[0.04] hover:text-white',
      )}
    >
      {children}
    </Link>
  );
}

function MobileChip({
  href,
  active,
  label,
}: {
  href: string;
  active: boolean;
  label: string;
}) {
  return (
    <Link
      href={href}
      className={cn(
        'shrink-0 rounded-full border px-3 py-1 text-xs transition-colors',
        active
          ? 'border-electric/40 bg-electric/10 text-electric'
          : 'border-white/10 text-slate-400',
      )}
    >
      {label}
    </Link>
  );
}