import IUIElement from "../Core/IUIElement.js";
import { IUI } from "../Core/IUI.js";

export default IUI.module(class SelectList extends IUIElement {
    constructor() {
        super({
            selected: null,
            list: [],
            query: (x) => null,
            formatter: (x) => x["name"]
        });

        var self = this;

        this._register("select");
        this.classList.add(this.cssClass);

//        this.menu = iui(menu[0]).menu({ customClass: this.customClass + "-menu", layout: this.layout.menu });
        this.menu = new Menu({ cssClass: this.cssClass + "-menu", "target-class": "" });

        this.menu.on("visible", function (v) {
            if (v)
                self.classList.add(self.cssClass + "-active");
            else
                self.classList.remove(self.cssClass + "-active");
        });

        this.menu.on("click", (e) => {
            let [data, element] = self.menu._getElementData(e.target);
            if (data != undefined)
                self.data = data;
        });


        document.body.appendChild(this.menu);

        this.label = document.createElement("div");
        this.label.className = this.cssClass + "-label";


        this.appendChild(this.label);

        this.label.addEventListener("click", function (e) {
            self.show();
        });

        this.arrow = document.createElement("div");
        this.arrow.className = this.customClass + "-arrow";

        this.header = document.createElement("div");
        this.header.className = this.customClass + "-header";

        this.header.appendChild(this.label);
        this.header.appendChild(this.arrow);

        this.appendChild(this.header);

        this.arrow.addEventListener("click", function (e) {
            self.show();
        });
    }

    clear() {
        this.menu.clear();
        return this;
    }

    add(item) {
        this.menu.add(item);
        return this;
    }

    set(item) {
        if (typeof item == "string" || typeof item == "number") {
            for (var i = 0; i < this.menu.list.length; i++) {
                if (this.menu.list[i][this.menu.index] == item) {
                    item = this.menu.list[i];
                    break;
                }
            }
        }

        // item is action
        this.label.innerHTML = this.layout.text.formatter ? this.layout.text.formatter(item[this.layout.text.field], item) : item[this.layout.text.field];
        this.selected = item;

        this._emit("select", item);
        return this;
    }

    show() {
        return this.setVisible(true);
    }

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

    _computeMenuOuterWidth() {
        return this.menu.offsetWidth - this.menu.clientWidth;
    }

    setVisible(visible) {
        if (visible) {
            this.response.start = 0;
            this._emit("query", null, this.response);

            // show menu
            var rect = this.el.getBoundingClientRect();
            this.menu.el.style.width = (rect.width - this._computeMenuOuterWidth()) + "px";
            this.menu.setVisible(true, rect.left, rect.top + rect.height);
        }
        else {
            this.menu.hide();
        }

        return this;
    }
});