import { IUI } from '../Core/IUI.js';
import IUIElement from '../Core/IUIElement.js';
import Background from './Background.js';
import DropDown from './DropDown.js';

export default class Menu extends IUIElement {
    constructor(props) {
        super(IUI.extend(props, {
            index: "iid",
            layout: { field: "name", formatter: null },
            visible: false,
            static: false,
            "target-class": "selected"
        }));

        this._register("visible");
        this._register("select");

        IUI._menus.push(this); 
    }



    // clear() {
    //     this.innerHTML = "";
    //     this._uiBindings = null;
    // }

    hide() {
        return this.setVisible(false);
    }

    //show(x, y, element) {
      //   return this.setVisible(true, x, y, element);
    //}

    show(event) {
        event.preventDefault();

        let el = event.currentTarget;
        let x = event.pageX;
        let y = event.pageY;

        this.setVisible(true, x, y, el);
    }


    async showModal(element) {

        
        //super.data = this._getElementData(element);

        await super.setData(element.data);

        if (!this.background) {
            this.background = document.getElementById("iui_app_background");

            if (!this.background) {
                this.background = new Background();// document.createElement("div");
                this.background.id = "iui_app_background";
                document.body.insertAdjacentElement("afterBegin", this.background);
            }
        }

        this.background.show();
        this.classList.add(this.cssClass + "-modal");
        this.classList.add(this.cssClass + "-visible");

        var width = (window.innerWidth * 0.8);
        this.style.width = width + "px";

        this.style.top = (window.pageYOffset + window.innerHeight / 2 - this.offsetHeight / 2) + "px"; // (document.body.clientHeight / 2 - this.clientHeight / 2) + "px";
        this.style.left = (window.pageXOffset + window.innerWidth / 2 - this.offsetWidth / 2) + "px"; //(document.body.clientWidth / 2 - width / 2) + "px";


        this.visible = true;
        this._emit("visible", { visible: true });

        return this;
    }

    async setVisible(visible, x, y, element) {
        this.visible = visible;
        
        if (this.target) {
            if (this["target-class"] != null && this["target-class"] != "") 
                this.target.classList.remove(this["target-class"]);
            this.target = null;
        }

        if (visible) {

            //if (element)
            //let dt = super._getElementData(element);
            if (element) {
                //[super.data, this.target] = dt;

                await this.setData(element.data);
                this.target = element;

                if (this["target-class"] != null && this["target-class"] != "")
                    this.target.classList.add(this["target-class"]);

            }
            
            this._pass = true;

            if (IUI.responsive && !this.static)
                return this.showModal();

            this.classList.remove(this.cssClass + "-modal");

            var rect = this.getBoundingClientRect();

            if (y != null) {
                if (y + rect.height > document.documentElement.clientHeight)
                    this.style.top = (document.documentElement.clientHeight - rect.height) + "px";
                else
                    this.style.top = y + "px";
            }

            this.classList.add(this.cssClass + "-visible");


            if (x != null) {

                if (x + rect.width > document.body.scrollWidth)
                    this.style.left = (document.body.scrollWidth - rect.width) + "px";
                //else if (x < 0)
                //	this.style.left = "0px";
                else
                    this.style.left = x + "px";

            }


        }
        else {

            this.classList.remove(this.cssClass + "-visible");

            if (this.background)
                this.background.hide();

            //await super.setData({});// = {};

        }

        this._emit("visible", { visible });

        return this;
    }
};

IUI.module(Menu);

IUI.responsive = false;

window.addEventListener("load", function () {

    var handler = function (e) {
        if (e.target.id == "iui_app_background" && IUI.responsive) {
            for (var i = 0; i < IUI._menus.length; i++)
                if (IUI._menus[i] instanceof Menu)
                    IUI._menus[i].setVisible(false);

            e.preventDefault();
            return;
        }

        for (var i = 0; i < IUI._menus.length; i++) {
            if (IUI._menus[i].visible) {
                var x = e.target;
                var m = IUI._menus[i];
                if (m instanceof Menu) {
                    if (m._pass) {
                        m._pass = false;
                        continue;
                    }
                    else 
                    if (m.visible)
                        if (!m.contains(e.target))
                            m.setVisible(false);
                }
                else if (m instanceof DropDown) {
                    if (!(m.contains(e.target) || m.menu.contains(e.target)))
                        m.setVisible(false);
                }
            }
        }

    };

    document.body.addEventListener("click", handler);
    document.body.addEventListener("touchstart", handler);
});