const menu = {
  _courses: {
    _appetizers:[],
    _mains: [],
    _desserts: [],
    get appetizers() {
      return this._appetizers;
    },
    set appetizers(appetizerIn) {
       this._appetizers.push(appetizerIn);
    },
    get mains() {
       return this._mains;
    },
    set mains(mainIn) {
       this._mains.push(mainIn);
    },
    get desserts() {
       return this._desserts;
    },
    set desserts(dessertIn) {
       this._desserts.push(dessertIn);
    }
  },
  get courses() {
    return {
      appetizers: this._courses.appetizers,
      mains: this._courses.mains,
      desserts: this._courses.desserts
    };
  },
  addDishToCourse(courseName, dishName, dishPrice) {
    const dish = {
      name: dishName,
      price: dishPrice
    };
    this._courses[courseName].push(dish);
  },
  getRandomDishFromCourse(courseName) {
    const dishes = this._courses[courseName];
    const randomIndex = Math.floor(Math.random() * dishes.length);
    return dishes[randomIndex];
  },
  generateRandomMeal: function() {
    const appetizer = this.getRandomDishFromCourse('appetizers');
    const main = this.getRandomDishFromCourse('mains');
    const dessert = this.getRandomDishFromCourse('desserts');
    const totalPrice = appetizer.price + main.price + dessert.price;
    return `Your meal is ${appetizer.name}, ${main.name}, ${dessert.name}. The price is $${totalPrice}.`;
  }
};

menu.addDishToCourse('appetizers', 'Caesar Salad', 8.50);
menu.addDishToCourse('mains', 'Scallopina al Funghi', 24.50);
menu.addDishToCourse('desserts', 'tiramisu', 6.50);

let meal = menu.generateRandomMeal();
console.log(meal);