/**
 * POST /api/keyword-research/bulk-volume
 * Returns search volume + difficulty for multiple keywords at once.
 * Used by Content Brief to populate keyword data.
 */

import { NextResponse } from "next/server";
import { getCurrentUser } from "@/lib/auth";
import { prisma } from "@/lib/prisma";
import { bulkVolume } from "@/lib/services/keyword-research";

export const dynamic = "force-dynamic";
export const maxDuration = 60;

export async function POST(req: Request) {
  const user = await getCurrentUser();
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });

  const body = await req.json().catch(() => null) as { brandId?: string; keywords?: string[]; location?: string } | null;
  if (!body?.brandId || !Array.isArray(body.keywords) || body.keywords.length === 0) {
    return NextResponse.json({ error: "brandId and keywords[] required" }, { status: 400 });
  }

  const brand = await prisma.brand.findUnique({
    where: { id: body.brandId },
    include: { organization: { include: { memberships: true } } },
  });
  if (!brand) return NextResponse.json({ error: "Brand not found" }, { status: 404 });
  if (!brand.organization.memberships.some((m) => m.userId === user.id)) {
    return NextResponse.json({ error: "Access denied" }, { status: 403 });
  }

  const results = await bulkVolume(body.keywords.slice(0, 100), body.location || "United States");
  return NextResponse.json({ keywords: results });
}
