const multer = require("multer");
const path = require("path");
const fs = require("fs");

const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    const patientId = req.params.id;
    const dir = path.join("uploads", "patients", String(patientId));

    fs.mkdirSync(dir, { recursive: true });
    cb(null, dir);
  },

  filename: (req, file, cb) => {
    const safeName = file.originalname.replace(/\s+/g, "_");
    cb(null, Date.now() + "_" + safeName);
  }
});

const upload = multer({
  storage,
  limits: { fileSize: 20 * 1024 * 1024 } // 20 MB
});

module.exports = upload;