import { auth } from "@/lib/auth";
import { prisma } from "@/lib/prisma";
import { writeFile, mkdir } from "fs/promises";
import path from "path";

const PIPELINE_ROOT = process.env.PIPELINE_ROOT || path.join(process.cwd(), "pipeline");

export async function POST(
  request: Request,
  { params }: { params: Promise<{ slug: string }> }
) {
  const session = await auth();
  if (!session) return new Response("Unauthorized", { status: 401 });

  const { slug } = await params;
  const app = await prisma.app.findUnique({ where: { slug } });
  if (!app) return Response.json({ error: "App not found" }, { status: 404 });

  const formData = await request.formData();
  const type = formData.get("type") as string; // "icon", "phone", or "screenshot"
  const file = formData.get("file") as File | null;

  if (!file || !file.type.startsWith("image/")) {
    return Response.json({ error: "No valid image file provided" }, { status: 400 });
  }

  const appDir = path.join(PIPELINE_ROOT, "apps", slug);
  const buffer = Buffer.from(await file.arrayBuffer());

  if (type === "icon" || type === "phone") {
    const filePath = path.join(appDir, `${type}.png`);
    await mkdir(appDir, { recursive: true });
    await writeFile(filePath, buffer);
    return Response.json({ path: `apps/${slug}/${type}.png` });
  }

  if (type === "screenshot") {
    const screenshotsDir = path.join(appDir, "screenshots");
    await mkdir(screenshotsDir, { recursive: true });
    const fileName = file.name || "screenshot.png";
    const filePath = path.join(screenshotsDir, fileName);
    await writeFile(filePath, buffer);
    return Response.json({ path: `apps/${slug}/screenshots/${fileName}` });
  }

  return Response.json({ error: "Invalid type. Use: icon, phone, or screenshot" }, { status: 400 });
}