import Link from "next/link";

import { aiToolItems } from "@/lib/nav/ai-tools";
import type { ActiveNav } from "@/lib/nav/items";

interface AiToolbarProps {
  projectId: string;
  activeNav?: ActiveNav;
}

// T4-a · 项目内页常驻 AI 工具条（顶栏下，UX §3/§5）。
// 纯链接服务端组件：写本章=朱砂主动作，其余次级；激活项朱砂高亮。窄屏横向滚动。
export function AiToolbar({ projectId, activeNav }: AiToolbarProps) {
  return (
    <nav
      aria-label="AI 工具条"
      className="flex h-12 items-center gap-2 overflow-x-auto whitespace-nowrap border-b border-line bg-panel px-4 sm:px-6"
    >
      {aiToolItems(projectId).map((item) => {
        const isActive = item.key === activeNav;
        const className = toolClassName(item.primary === true, isActive);
        return (
          <Link
            key={item.href}
            href={item.href}
            aria-current={isActive ? "page" : undefined}
            className={className}
          >
            <span aria-hidden="true">{item.glyph}</span>
            <span>{item.label}</span>
          </Link>
        );
      })}
    </nav>
  );
}

function toolClassName(isPrimary: boolean, isActive: boolean): string {
  const base =
    "flex items-center gap-1.5 rounded border px-3 py-1.5 text-sm transition-colors";
  if (isActive) {
    return `${base} border-cinnabar text-cinnabar`;
  }
  if (isPrimary) {
    return `${base} border-cinnabar bg-cinnabar text-panel hover:border-cinnabar`;
  }
  return `${base} border-line text-ink-soft hover:border-cinnabar hover:text-cinnabar`;
}
