const { isObject } = require("lodash");

const validateCanvasRequestMiddleware = (req, res, next) => {
  const { w, h, values, keys, override } = req.body;
  if (!values || !keys) {
    return res.status(400).send("Missing required data");
  }
  if (override && !isObject(override)) {
    return res.status(400).send("Override must be an object");
  }
  if (w && (!Number.isFinite(w) || w <= 0)) {
    return res.status(400).send("Width must be a positive number");
  }
  if (h && (!Number.isFinite(h) || h <= 0)) {
    return res.status(400).send("Height must be a positive number");
  }
  next();
};

module.exports = validateCanvasRequestMiddleware;