import { NextRequest, NextResponse } from "next/server";

/** 支持：xiaohongshu.com/user/profile/xxx、xhslink.com/user/profile/xxx、xhslink.com/m/xxx 短链 */
const XH_PROFILE_PATTERN = /^https?:\/\/(www\.)?(xiaohongshu\.com|xhslink\.com)\/user\/profile\/[a-zA-Z0-9_-]+/i;
const XH_SHORT_PATTERN = /^https?:\/\/xhslink\.com\/m\/[a-zA-Z0-9_-]+/i;

function isValidUrl(url: string): boolean {
  return XH_PROFILE_PATTERN.test(url) || XH_SHORT_PATTERN.test(url);
}

export async function POST(request: NextRequest) {
  try {
    const body = await request.json();
    const url = String(body?.url || "").trim();

    if (!url) {
      return NextResponse.json({ valid: false, error: "请输入小红书链接" }, { status: 400 });
    }

    const valid = isValidUrl(url);
    if (!valid) {
      return NextResponse.json({ valid: false, error: "小红书link异常" }, { status: 200 });
    }

    return NextResponse.json({ valid: true });
  } catch {
    return NextResponse.json({ valid: false, error: "校验失败" }, { status: 500 });
  }
}