import path from "path";
import fs from "fs";

const UPLOAD_DIR = process.env.UPLOAD_DIR || path.join(process.cwd(), "public", "uploads");

export function getUploadDir(subdir = "") {
  const dir = path.join(UPLOAD_DIR, subdir);
  if (!fs.existsSync(dir)) {
    fs.mkdirSync(dir, { recursive: true });
  }
  return dir;
}

export function getPublicUrl(filename: string, subdir = "") {
  const base = subdir ? `/${subdir}` : "";
  return `${base}/${filename}`;
}

export function sanitizeFilename(name: string) {
  return name
    .normalize("NFD")
    .replace(/[\u0300-\u036f]/g, "")
    .replace(/[^a-zA-Z0-9._-]/g, "_")
    .toLowerCase();
}