import { NextResponse } from "next/server";
import { requireAdmin } from "@/lib/session";
import prisma from "@/lib/prisma";
import { writeFile, mkdir } from "fs/promises";
import path from "path";

export async function POST(request: Request) {
  const { error } = await requireAdmin();
  if (error) return error;

  try {
    const formData = await request.formData();
    const file = formData.get("file") as File;
    const type = formData.get("type") as string;

    if (!file) {
      return NextResponse.json({ error: "No file provided" }, { status: 400 });
    }

    const bytes = await file.arrayBuffer();
    const buffer = Buffer.from(bytes);

    const uploadDir = path.join(process.cwd(), "public", "uploads");
    await mkdir(uploadDir, { recursive: true });

    const ext = file.name.split(".").pop() || "jpg";
    const filename = `${type}-${Date.now()}.${ext}`;
    const filepath = path.join(uploadDir, filename);

    await writeFile(filepath, buffer);

    const url = `/uploads/${filename}`;

    if (type === "logo" || type === "favicon" || type === "hero" || type === "og") {
      const fieldMap: Record<string, string> = {
        logo: "logoUrl",
        favicon: "faviconUrl",
        hero: "heroImageUrl",
        og: "ogImageUrl",
      };
      await prisma.siteSettings.update({
        where: { id: "default" },
        data: { [fieldMap[type]]: url },
      });
    }

    return NextResponse.json({ url });
  } catch (err) {
    console.error(err);
    return NextResponse.json({ error: "Upload failed" }, { status: 500 });
  }
}