class ChristmasDinner {
    constructor(budget) {
        if (budget < 0) {
            throw new Error("The budget cannot be a negative number");
        }
        this.budget = budget;
        this.dishes = [];
        this.products = [];
        this.guests = {};
    }

    shopping(productArr) {
        let [product, price] = productArr;
        price = Number(price);
        if (this.budget < price) {
            throw new Error(`Not enough money to buy this product`);
        }
        this.products.push(product);
        this.budget -= price;
        return `You have successfully bought ${product}! `
    }

    recipes(recipe) {
        let isHasProducts = true;
        recipe.productsList.forEach(product => {
            if (!this.products.includes(product)) {
                isHasProducts = false;
            }
        });

        if (!isHasProducts) {
            return `We do not have this product`;
        }

        this.dishes.push(recipe);
        return `${recipe.recipeName} has been successfully cooked!`;
    }

    inviteGuests(name, dish) {
        if (!this.dishes.some(x => x.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.entries(this.guests).forEach(guest => {
            this.dishes.forEach(dish => {
                if (dish.recipeName == guest[1]) {
                    result.push(`${guest[0]} will eat ${dish.recipeName}, which consists of ${dish.productsList.join(', ')}`);
                }
            });
        });
        return result.join('\n');
    }
}