class Term {
    stringValue;

    constructor(stringValue) {
        this.stringValue = stringValue;
    }

    toString() {
        return `Term[${stringValue}]`;
    }

    valueOf() {
        return this.stringValue;
    }
}

export class NumberTerm extends Term {
    value;

    constructor(stringValue) {
        super(stringValue);

        const parsedValue = parseInt(stringValue);
        if (isNaN(parsedValue)) {
            throw new TypeError("Number value is not a valid number");
        }

        this.value = parsedValue;
    }

    valueOf() {
        return this.value;
    }

    toString() {
        return `Number[${this.value}]`;
    }
}

export class NameTerm extends Term {
    static regex = /[-\w]+/;

    constructor(stringValue) {
        if (!NameTerm.regex.test(stringValue)) {
            throw new TypeError("Name must be string with non-zero length");
        }

        super(stringValue);
    }

    toString() {
        return `Name[${this.stringValue}]`;
    }
}