3. Christmas Dinner

class ChristmasDinner {
  constructor(budget) {
    this.budget = budget;
    this.dishes = [];
    this.products = [];
    this.guests = {};
  }

  get budget() {
    return this._budget;
  }

  set budget(value) {
    if (value < 1) {
      throw new Error('The budget cannot be a negative number');
    } else {
      this._budget = value;
    }
  }

  shopping(productArr) {
    const [type, price] = [...productArr];
    if (Number(price) > this._budget) {
      throw new Error('Not enough money to buy this product');
    } else {
      this.products.push(type);
      this._budget -= Number(price);

      return `You have successfully bought ${type}!`;
    }
  }

  recipes(recipeObj) {
    const { productsList } = recipeObj;
    const { recipeName } = recipeObj;

    productsList.map((p) => {
      if (this.products.includes(p) === false) {
        throw new Error('We do not have this product');
      }
    });

    this.dishes.push({
      recipeName,
      productsList,
    });

    return `${recipeName} has been successfully cooked!`;
  }

  inviteGuests(name, dish) {
    if (!this.dishes.find((d) => d.recipeName === dish)) {
      throw new Error('We do not have this dish');
    }

    if (this.guests.hasOwnProperty(name)) {
      throw new Error('This guest has already been invited');
    }

    this.guests[name] = dish;

    return `You have successfully invited ${name}!`;
  }

  showAttendance() {
    let result = '';

    Object.keys(this.guests)
      .map((name) => {
        const dish = this.dishes.find((d) => d.recipeName === this.guests[name]);
        const dishProducts = dish.productsList.join(', ');

        result += `${name} will eat ${this.guests[name]}, which consists of ${dishProducts}\n`;
      });

    return result.trim();
  }
}