class ChristmasDinner {
    constructor(budget){
        this.budget = Number(budget);
        this.dishes = [];
        this.products = [];
        this.guests = {};
    }
    get budget(){
        return this._budget;
    }
    set budget(budget){
        if(this.budget < 0){
         return 'The budget cannot be a negative number';
        }else{
            return this._budget = budget;
        }
    }
    shopping(product){
      if(this.budget > product[1]){
         this.products.push(product[0]);
         this.budget -= product[1];
         return `You have successfully bought ${product[0]}!`;
      }else{
          throw new Error ('Not enough money to buy this product');
      }
    }
    recipes(recipe){
     let checker = (arr, target) => target.every(v => arr.includes(v));
     if(checker(this.products, recipe.productsList)){
         this.dishes.push({recipeName:recipe.recipeName, productList: recipe.productsList});
         return `${recipe.recipeName} has been successfully cooked!`
     }else{
         throw new Error ('We do not have this product');
     }
    }
    inviteGuests(name, dish){
     const found = this.dishes.some(item => item.recipeName === dish);
        if(found){
          if(this.guests[name]){
             throw new Error('This guest has already been invited')
          }else{
              this.guests[name] = dish;
              return `You have successfully invited ${name}!`;
         }
       }else{
        throw new Error ('We do not have this dish');
       }
   }
   showAttendance(){
    let result = "";

        for (const name in this.guests) {
            const targetDish = this.dishes.find(d => d.recipeName === this.guests[name]);
            result += `${name} will eat ${this.guests[name]}, which consists of ${targetDish.productList.join(', ')}\n`;
        }

        return result.trim();
    }
 }