Koce - Breakfast Robot

function solve() {
  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,
      fat: 10,
      carbohydrates: 10,
      flavour: 10,
    }
  }

  const stocks = {
    protein: 0,
    carbohydrate: 0,
    fat: 0,
    flavour: 0
  };

  const commands = {
    restock : (microelement, quantity) =>  {
      stocks[microelement] += quantity
      return 'Success';
    },
    prepare: (product, quanity) => {
      let recipe = Object.entries(recipes[product]);

      for(let[item,countNeeded] of recipe) {
          if(stocks[item] < countNeeded * quanity) {
            return `Error: not enough ${item} in stock`;
          }
      }

      recipe.forEach(([item, countNeeded]) => {
        stocks[item] -= countNeeded * quanity;
      });

      return 'Success'

    },
    report : () => Object.
                    entries(stocks).
                    map(([microelement, count]) => `${microelement}=${count}` ).
                    join(' ')

  };

  return (input) => {
    let [command, item, count] = input.split(' ');
    return commands[command](item, +count);
  }
}