package com.magicpigeon.adf.util;

import javax.faces.context.FacesContext;

import oracle.adf.view.rich.component.rich.RichPopup;

import org.apache.myfaces.trinidad.render.ExtendedRenderKitService;
import org.apache.myfaces.trinidad.util.Service;

/**
 * Class that contains utility methods for manipulating the client-side
 * rich components in server-side code using the Extended render Kit Services
 */
public final class RichClientUtils {

    /**
     * Default Constructor
     */
    private RichClientUtils() {
    }

    /** Show popup window.
     * @param popup The popup to be shown
     * @param alignId If specified, align after end with this id.
     * If null, no alignment is configured (and by default the popup will open
     * in the middle of the browser window).
     */
    public static void showPopup(RichPopup popup, String alignId) {
        FacesContext context = FacesContext.getCurrentInstance();
        String popupClientId =
            popup.getClientId(FacesContext.getCurrentInstance());

        // Send Javascript to the client to open the popup window, since
        // opening an <af:popup> is totally on the client side.
        StringBuilder script = new StringBuilder();
        script.append("var popup = AdfPage.PAGE.findComponent('").append(popupClientId).append("'); ").append("if (!popup.isPopupVisible()) { ").append("var hints = {}; ");
        if (alignId != null) {
            script.append("hints[AdfRichPopup.HINT_ALIGN_ID] = '").append(alignId).append("'; ").append("hints[AdfRichPopup.HINT_ALIGN] = AdfRichPopup.ALIGN_AFTER_END; ");
        }
        script.append("popup.show(hints);}");
        ExtendedRenderKitService erks =
            Service.getService(context.getRenderKit(),
                               ExtendedRenderKitService.class);
        erks.addScript(context, script.toString());

    }

    /**
     * Hides the popup given by parameter
     * @param popup
     */
    public static void hidePopup(RichPopup popup) {
        FacesContext context = FacesContext.getCurrentInstance();
        String popupClientId = popup.getClientId(context);
        StringBuilder script = new StringBuilder();
        script.append("var popup = AdfPage.PAGE.findComponent('").append(popupClientId).append("'); ").append("popup.hide();");
        ExtendedRenderKitService erks =
            Service.getService(context.getRenderKit(),
                               ExtendedRenderKitService.class);
        erks.addScript(context, script.toString());
    }

    /**
     * Write JavaScript to the Client
     * @param script
     */
    public static void writeJavaScriptToClient(String script) {
        FacesContext fctx = FacesContext.getCurrentInstance();
        ExtendedRenderKitService erks =
            Service.getRenderKitService(fctx, ExtendedRenderKitService.class);
        erks.addScript(fctx, script);
    }

}