06. Breakfast Robot Exercise: Advanced Functions

const robot = (function result() {
    const ingredients = { protein: 0, carbohydrate: 0, fat: 0, flavour: 0 }

    const recipes = {
        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 }
    }

    const checkIngredients = (recipes, meal, quantity, ingredients) => {
        return neededIngredients = Object.keys(recipes[meal]).reduce((neededIngredients, ingredient, ind) => {
            if (neededIngredients.thereIsEnoughtIngredients && recipes[meal][ingredient] * quantity > ingredients[ingredient]) {
                neededIngredients.thereIsEnoughtIngredients = false;
                neededIngredients.ingredientWhichIsNotEnought = ingredient;
            } else {
                neededIngredients[ingredient] = recipes[meal][ingredient] * quantity;
            }
            return neededIngredients
        }, { thereIsEnoughtIngredients: true, ingredientWhichIsNotEnought: '' });
    }

    const reduceIngredients = (recipes, meal, neededIngredients, ingredients) => {
        if (neededIngredients.thereIsEnoughtIngredients)
            Object.keys(recipes[meal]).forEach(ingredient => ingredients[ingredient] -= neededIngredients[ingredient])
    }

    return function solve(string) {
        const tokens = string.split(' ');
        const command = tokens[0];

        if (command === 'restock') {
            ingredients[tokens[1]] += Number(tokens[2]);
            return 'Success';
        } else if (command === 'prepare') {
            const meal = tokens[1];
            const quantity = Number(tokens[2]);
            checkIngredients(recipes, meal, quantity, ingredients);
            reduceIngredients(recipes, meal, neededIngredients, ingredients);

            return (neededIngredients.thereIsEnoughtIngredients)
                ? 'Success'
                : `Error: not enough ${neededIngredients.ingredientWhichIsNotEnought} in stock`

        } else if (command === 'report') {
            return `protein=${ingredients.protein} carbohydrate=${ingredients.carbohydrate} fat=${ingredients.fat} flavour=${ingredients.flavour}`;
        }
    }
})();

console.log(robot("restock carbohydrate 10"));
console.log(robot("restock flavour 10"));
console.log(robot("prepare apple 1"));
console.log(robot("restock fat 10"));
console.log(robot("prepare burger 1"));
console.log(robot("report"));
// Result is:
// Success
// Success
// Success
// Success
// Success
// protein=0 carbohydrate=4 fat=3 flavour=5

console.log(robot("prepare turkey 1"));
console.log(robot("restock protein 10"));
console.log(robot("prepare turkey 1"));
console.log(robot("restock carbohydrate 10"));
console.log(robot("prepare turkey 1"));
console.log(robot("restock fat 10"));
console.log(robot("prepare turkey 1"));
console.log(robot("restock flavour 10"));
console.log(robot("prepare turkey 1"));
console.log(robot("report"));
// Result is:
// Error: not enough protein in stock
// Success
// Error: not enough carbohydrate in stock
// Success
// Error: not enough fat in stock
// Success
// Error: not enough flavour in stock
// Success
// Success
// protein=0 carbohydrate=0 fat=0 flavour=0