class Vacationer {
    constructor(fullName, creditCard) {
        this.fullName = fullName;
        this.creditCard = creditCard;
        this.wishList = [];
        this.idNumber = 0;
    }

    set creditCard(card) {
        this._creditCard = this.addCreditCardInfo(card);
    }

    get creditCard() {
        return this._creditCard;
    }

    set idNumber(num) {
        this._idNumber = this.generateIDNumber();
    }

    get idNumber() {
        return this._idNumber;
    }

    set fullName(value) {
        if (value.length !== 3) {
            throw new Error('Name must include first name, middle name and last name');
        }

        let firstName = value[0];
        let middleName = value[1];
        let lastName = value[2];
        let pattern = /^[A-Z][a-z]+$/;

        if (!(pattern.test(firstName) && pattern.test(middleName) && pattern.test(lastName))) {
            throw new Error('Invalid full name');
        }

        this._fullName = {
            firstName,
            middleName,
            lastName
        };
    }

    get fullName() {
        return this._fullName;
    }

    addCreditCardInfo(value) {

        if (value === undefined) {
            return {
                cardNumber: 1111,
                expirationDate: '',
                securityNumber: 111
            };
        } else {
            if (value.length !== 3) {
                throw new Error('Missing credit card information');
            } else {
                if (typeof value[0] !== 'number' || typeof value[2] !== 'number') {
                    throw new Error('Invalid credit card details');
                } else {
                    let cardNumber = value[0];
                    let expirationDate = value[1];
                    let securityNumber = value[2];
                    return {
                        cardNumber,
                        expirationDate,
                        securityNumber
                    };
                }
            }
        }
    }

    addDestinationToWishList(destination) {
        if (this.wishList.includes(destination)) {
            throw new Error('Destination already exists in wishlist');
        }

        return this.wishList.push(destination);
    }

    generateIDNumber() {
        let firstNameFirstLetterAscii = this._fullName.firstName.charAt(0).charCodeAt(0);
        let middleNameLength = this._fullName.middleName.length;
        let lastNameLetter = this._fullName.lastName.charAt(this._fullName.lastName.length - 1);
        let sum = 231 * firstNameFirstLetterAscii + 139 * middleNameLength;

        let add = "7";

        if (lastNameLetter === 'a' || lastNameLetter === 'e' || lastNameLetter === 'o' || lastNameLetter === 'i' || lastNameLetter === 'u') {
            add = "8";
        }

        return sum + add;
    }

    getVacationerInfo() {
        let destinations = this.wishList.sort((a, b) => a.length - b.length).join(', ');

        if (this.wishList.length === 0) {
            destinations = 'empty';
        }

        return `Name: ${this._fullName.firstName} ${this._fullName.middleName} ${this._fullName.lastName}\nID Number: ${this._idNumber}\nWishlist:\n${destinations}\nCredit Card:\nCard Number: ${this.creditCard.cardNumber}\nExpiration Date: ${this.creditCard.expirationDate}\nSecurity Number: ${this.creditCard.securityNumber}`;
    }
}