const fs = require('fs')
const util = require("util");
const multer = require("multer");
const { customAlphabet } = require("nanoid");


const maxSize = 20 * 4096 * 4096;

let storage = multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, __basedir + "/static/uploads/");
    },
    filename: (req, file, cb) => {
        const nanoid = customAlphabet('1234567890abcdefghijklmnoprst', 10);
        cb(null, `${nanoid().toString()}-${Date.now()}`);
    },
});


let uploadFile = multer({
    storage: storage,
    limits: { fileSize: maxSize },
}).single("wasteDoc");

let uploadFileMiddleware = util.promisify(uploadFile);

module.exports = uploadFileMiddleware;