import { auth } from "~/lib/auth.server";
import { buildWebhookUrl, uploadAvatarImage } from "~/lib/cloudinary.server";
import { logger } from "~/lib/logger";
import type { Route } from "./+types/api.upload-avatar";

const MAX_UPLOAD_BYTES = 5 * 1024 * 1024;
const ACCEPTED_IMAGE_TYPES = new Set(["image/jpeg", "image/png", "image/webp", "image/gif"]);

export async function action({ request }: Route.ActionArgs) {
  const session = await auth.api.getSession({ headers: request.headers });
  if (!session) {
    return Response.json({ error: "Unauthorized" }, { status: 401 });
  }

  const formData = await request.formData();
  const file = formData.get("file");

  if (!(file instanceof File)) {
    return Response.json({ error: "Image file is required" }, { status: 400 });
  }

  if (!ACCEPTED_IMAGE_TYPES.has(file.type)) {
    return Response.json({ error: "Unsupported image type" }, { status: 400 });
  }

  if (file.size > MAX_UPLOAD_BYTES) {
    return Response.json({ error: "Image must be under 5 MB" }, { status: 400 });
  }

  try {
    const buffer = Buffer.from(await file.arrayBuffer());
    await uploadAvatarImage({
      buffer,
      contentType: file.type,
      target: "user",
      entityId: session.user.id,
      notificationUrl: buildWebhookUrl(request),
    });

    return Response.json({ status: "pending" });
  } catch (error) {
    logger.error("Avatar upload failed:", error);
    return Response.json({ error: "Upload failed" }, { status: 500 });
  }
}