import { auth } from "@/lib/auth";
import { getActiveApp } from "@/lib/active-app";
import { writeFile, mkdir } from "fs/promises";
import path from "path";
import { randomUUID } from "crypto";

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

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

  const formData = await request.formData();
  const files = formData.getAll("files") as File[];

  if (files.length === 0) {
    return Response.json({ error: "No files provided" }, { status: 400 });
  }

  // Determine upload path based on active app
  const activeApp = await getActiveApp();
  const screenshotsDir = activeApp
    ? path.join(PIPELINE_ROOT, "apps", activeApp.slug, "screenshots")
    : path.join(PIPELINE_ROOT, "assets", "screenshots");
  const relativeBase = activeApp
    ? `apps/${activeApp.slug}/screenshots`
    : "assets/screenshots";

  await mkdir(screenshotsDir, { recursive: true });

  const uploaded: { fileName: string; path: string }[] = [];

  for (const file of files) {
    if (!file.type.startsWith("image/")) continue;

    const ext = path.extname(file.name) || ".png";
    const uniqueName = `${randomUUID()}${ext}`;
    const filePath = path.join(screenshotsDir, uniqueName);

    const buffer = Buffer.from(await file.arrayBuffer());
    await writeFile(filePath, buffer);

    uploaded.push({
      fileName: file.name,
      path: `${relativeBase}/${uniqueName}`,
    });
  }

  return Response.json({ uploaded });
}