import config from "../../config";
import Component, { IComponent, IComponentSelector } from "../core/Component";

const selectors = {
    element: `.${config.prefix}-dropdown`,
    content: `.${config.prefix}-dropdown-content`,
    wrapper: `.${config.prefix}-dropdown-wrapper`,
    header: `.${config.prefix}-dropdown-header`,
};

interface IDropdownSelector extends IComponentSelector {
    content: string;
    wrapper: string;
    header: string;
}

interface IDropdown extends IComponent {
    selectors?: IDropdownSelector;
}

let index = 0;

class Dropdown extends Component {
    id: string;

    constructor(props: IDropdown = {}) {
        super({
            ...props,
            Component: Dropdown,
            selectors: Object.assign(selectors, props.selectors || {}),
        });

        this.id = String(index++);

        if (this.options && this.options.mount) {
            this.mount();
        }
    }

    mount() {
        if (!this.$element || this._mount || this.$element.attr("data-mount")) {
            return;
        }

        super.mount();

        this.options = Object.assign({}, this.options);

        this.handlers = {
            documentClickHandler: this.documentClickHandler.bind(this),
            clickHandler: this.clickHandler.bind(this),
        };

        this.addEvents();

        this.$element.attr("data-id", this.id);

        this.on.mount(this);
        this.emitter.emit("mount", this);
    }

    addEvents() {
        this.$element.on("click", this.handlers.clickHandler);
        document.addEventListener("click", this.handlers.documentClickHandler);
    }

    documentClickHandler(e: Event) {
        const target = e.target.closest(this.selectors.element);
        const id = target ? target.getAttribute("data-id") == this.id : null;

        if (
            (!target && this.$element.attr("data-active") !== null) ||
            (target && !id)
        ) {
            this.$element.attr("data-active", null);
            this.on.destroy(this);
            this.emitter.emit("destroy", this);
        }
    }

    clickHandler() {
        if (this.$element.attr("data-active") === null) {
            this.$element.attr("data-active", "");
            this.on.render(this);
            this.emitter.emit("render", this);
        } else {
            this.$element.attr("data-active", null);
            this.on.destroy(this);
            this.emitter.emit("destroy", this);
        }
    }

    unmount() {
        super.unmount();

        document.removeEventListener(
            "click",
            this.handlers.documentClickHandler
        );
        this.$element.off("click", this.handlers.clickHandler, null);

        this.on.unmount(this);
        this.emitter.emit("unmount", this);
    }
}

export default Dropdown;