import dom = require("dojo/dom-construct");
import attr = require("dojo/dom-attr");
import { argumentNotNull } from "@implab/core-amd/safe";
import { BuildContextBase } from "./BuildContextBase";


export class FunctionComponentContext extends BuildContextBase<Element> {
    private _component: (props: any) => Element;

    private _element: Element | undefined;

    constructor(component: (props: any) => Element) {
        super();
        argumentNotNull(component, "component");

        this._component = component;
    }

    _create(attrs: object, children: any[]) {
        const _attrs: any = attrs || {};
        _attrs.children = children.map(x => this.getChildDom(x));

        this._element = this._component.call(null, _attrs);
    }

    _getDomNode() {
        if (!this._element)
            throw new Error("The instance of the widget isn't created");
        return this._element;
    }

}