import { UIWindow } from "./window";

export class ViewManager {
    private currentWindow: UIWindow;
    private windows: UIWindow[];
    private viewElement: HTMLDivElement;
    public constructor() {
        this.windows = [];
        this.viewElement = document.createElement("div");
    }

    public add(window: UIWindow) {
        this.windows.push(window);
        window.onConnect();
        this.viewElement.appendChild(window.show());
    }

    public remove(window: UIWindow) {
        this.windows.splice(this.windows.indexOf(window), 1);
        window.onDisconnect();
        this.viewElement.removeChild(window.show());
    }

    public switchTo(window: UIWindow) {
        if (this.currentWindow !== undefined) {
            this.currentWindow.onDisconnect();
        }
        this.currentWindow = window;
        this.currentWindow.onConnect();
    }

    public render() {
        return this.viewElement;
    }
}