/*
 * Copyright (C) 2011 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.gatein.portal.samples.api;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;

import javax.portlet.GenericPortlet;
import javax.portlet.PortletException;
import javax.portlet.PortletURL;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;
import javax.portlet.ResourceURL;


/**
 * This portlet shows how to leverage the portlet URL <code>gtn:lang</code> property to set the language for render urls.
 *
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class LocaleURLPortlet extends GenericPortlet {

    @Override
    public void serveResource(ResourceRequest req, ResourceResponse resp) throws PortletException, IOException {
        resp.setContentType("text/html");
        PrintWriter writer = resp.getWriter();
        String namespace = "n_" + resp.getNamespace();
        ResourceURL resourceURL = resp.createResourceURL();
        resourceURL.setCacheability(ResourceURL.PAGE);
        PortletURL renderURL = resp.createRenderURL();
        Locale current = req.getLocale();

        //
        writer.print("<html>" + "<head>" + "<script type='text/javascript'>" + "function openLinkInParent(){"
                + "var e = document.getElementById(\"" + namespace + "\");" + "var url = e.options[e.selectedIndex].value;"
                + "window.open(url,'" + namespace + "_parent');" + "window.focus();" + "}\n");

        writer.print("</script>" + "</head>" + "<body>");

        writer.print("<p>Selecting a language will update the main portal window with the language in URL</p>");

        writer.print("<p><form action=\"javascript:openLinkInParent()\">");
        writer.print("<select id=\"" + namespace + "\">");
        renderURL.setProperty("gtn:lang", "");
        writer.print("<option value='" + renderURL + "'> </option>");
        for (String lang : new String[] { "en", "fr", "it", "vi" }) {
            renderURL.setProperty("gtn:lang", lang);
            writer.print("<option value=\"" + renderURL + "\">" + new Locale(lang).getDisplayName(current) + "</option>");
        }
        writer.print("</select>");
        writer.print("<input type='submit' value=\"Change\"/>");
        writer.print("</form></p>");
        writer.print("</body></html>");
    }

    @Override
    protected void doView(RenderRequest req, RenderResponse resp) throws PortletException, IOException {
        resp.setContentType("text/html");
        PrintWriter writer = resp.getWriter();
        Locale current = req.getLocale();
        ResourceURL resource = resp.createResourceURL();
        resource.setCacheability(ResourceURL.PAGE);
        String namespace = "n_" + resp.getNamespace();
        String remoteWindowName = namespace + "_remote";

        writer.print("<script type='text/javascript'>" + "var " + remoteWindowName + "; function " + namespace + "_popup(url){"
                + "window.name='" + namespace + "_parent';" + "window.open(url, '" + remoteWindowName
                + "', 'width=256,height=128,scrollable=yes')" + "}" + "onload = function() {" + "if (typeof "
                + remoteWindowName + " != 'undefined') " + "{" + remoteWindowName + ".location.reload(true);" + "}" + "}"
                + "</script>");

        writer.print("<p><a href='#' onclick=\"" + namespace + "_remote=" + namespace + "_popup('" + resource + "')\">"
                + "Language controller</a></p>");

        writer.print("<p>Current locale is " + current.getDisplayName(current) + "</p>");

        //
        writer.close();
    }
}