interface ApiUser {
	firstname: string
	lastname: string
	age: number
	isSuperUser: boolean
	authorities: string[]
	createdOn: Date
	lastModifiedOn: Date
}

class User {
	public constructor(
		protected firstname: string,
        protected lastname: string,
		protected age: number) {}

    private (api: ApiUser) {
        if (!api.isSuperUser) {
            return new User(
                api.firstname,
                api.lastname,
                api.age
            )
        } else {
            return SuperUser.of(new User(User));
        }
    }

	displayInfos() {
		console.info(`${this.firstname} - ${this.lastname} - ${this.age}`)
	}
}

class SuperUser extends User {
    private constructor(firstname: string, lastname: string, age: number, private authorities: string[]) {
        super(firstname, lastname, age);
    }

    public static of(api: ApiUser) {
        if (!api.isSuperUser) {
            throw new Error('Cannot instantiate if not super user')
        } else {
            return new SuperUser(
                api.firstname,
                api.lastname,
                api.age,
                api.authorities
            )
        }
    }
	displayInfos() {
		console.info(`${this.firstname} - ${this.lastname} - ${this.age} - ${this.authorities}`)
	}
}