import { auth } from "~/lib/auth.server";
import { uploadSportIcon } from "~/lib/cloudinary.server";
import { logger } from "~/lib/logger";
import { isUserAdmin } from "~/models/user";
import type { Route } from "./+types/api.upload-sport-icon";

const MAX_UPLOAD_BYTES = 1024 * 1024;

function isSvgFile(file: File): boolean {
  return file.type === "image/svg+xml" || file.name.toLowerCase().endsWith(".svg");
}

function looksLikeSvg(buffer: Buffer): boolean {
  return buffer.toString("utf8", 0, Math.min(buffer.length, 1024)).includes("<svg");
}

export async function action({ request }: Route.ActionArgs) {
  const session = await auth.api.getSession({ headers: request.headers });
  const userId = session?.user.id ?? null;

  if (!userId) {
    return Response.json({ error: "Unauthorized" }, { status: 401 });
  }

  if (!(await isUserAdmin(userId))) {
    return Response.json({ error: "Forbidden" }, { status: 403 });
  }

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

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

  if (!isSvgFile(file)) {
    return Response.json({ error: "Icon must be an SVG file" }, { status: 400 });
  }

  if (file.size > MAX_UPLOAD_BYTES) {
    return Response.json({ error: "Icon must be under 1 MB" }, { status: 400 });
  }

  try {
    const buffer = Buffer.from(await file.arrayBuffer());
    if (!looksLikeSvg(buffer)) {
      return Response.json({ error: "Icon must be a valid SVG file" }, { status: 400 });
    }

    const result = await uploadSportIcon({
      buffer,
      slug: typeof slug === "string" ? slug : null,
    });

    return Response.json({ iconUrl: result.secure_url });
  } catch (error) {
    logger.error("Sport icon upload failed:", error);
    return Response.json({ error: "Upload failed" }, { status: 500 });
  }
}