Breakfast Robot

function solution() {
    let storage = {
        protein: 0,
        carbohydrate: 0,
        fat: 0,
        flavour: 0,
    }

    let foodInfo = {
        apple: {
            carbohydrate: 1,
            flavour: 2,
        },
        lemonade: {
            carbohydrate: 10,
            flavour: 20,
        },
        burger: {
            carbohydrate: 5,
            fat: 7,
            flavour: 3,
        },
        eggs: {
            protein: 5,
            fat: 1,
            flavour: 1,
        },
        turkey: {
            protein: 10,
            carbohydrate: 10,
            fat: 10,
            flavour: 10,
        }
    }

    let handler = {
        restock(microelement, quantity) {
            storage[microelement] += quantity;
            return "Success"
        },
        prepare(recipe, quantity) {
            let requiredAmmountPerUnit = foodInfo[recipe];
            let items = Object.entries(requiredAmmountPerUnit);

            let canCook = true;

            for (const pair of items) {
                let ingredient = pair[0];
                let ammount = pair[1];

                if (storage[ingredient] < ammount * quantity) {
                    canCook = false;
                    return `Error: not enough ${ingredient} in stock`
                }
            }

            if (canCook) {
                items.forEach(x => storage[x[0]] -= x[1] * quantity);
                return `Success`;
            }
        },
        report() {
            let entries = Object.entries(storage);
            return `${entries[0][0]}=${entries[0][1]} ${entries[1][0]}=${entries[1][1]} ${entries[2][0]}=${entries[2][1]} ${entries[3][0]}=${entries[3][1]}`
        }
    }

    return function management(param) {
        let [action, token, quantity] = param.split(' ');
        quantity = +quantity;
        if (action !== 'report') {
            return handler[action](token, quantity);
        } else {
            return handler[action]();
        }
    }
}