import { element } from "./element.js";
import { type_manager } from "./functions.js";

class elements_list {
    #content;

    constructor() {
        this.#content = {};
    }

    append(target) {
        if (!(target instanceof element)) {
            throw "New target on list must be instance of an element.";
        }

        if (this.exists(target)) {
            throw "This element already exists on list.";
        }

        this.#content[target.name] = target;
    }

    exists(target) {
        if (target instanceof element) {
            target = target.name;
        }

        if (!(type_manager.is_string(target))) {
            throw "Target must be instance of string or element.";
        }

        return this.#content.hasOwnProperty(target);
    }

    get(target) {
        if (!this.exists(target)) {
            throw "Element with that name not exists on list.";
        }

        return this.#content[target];
    }

    get content() {
        return Object.assign({}, this.#content);
    }
}

export { elements_list };