/*
 * 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.exoplatform.portal.application;

import java.util.Enumeration;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.exoplatform.portal.config.UserPortalConfig;
import org.exoplatform.portal.config.UserPortalConfigService;
import org.exoplatform.portal.mop.SiteKey;
import org.exoplatform.portal.mop.user.UserNavigation;
import org.exoplatform.portal.mop.user.UserNode;
import org.exoplatform.portal.mop.user.UserNodeFilterConfig;
import org.exoplatform.portal.mop.user.UserPortal;
import org.exoplatform.portal.mop.user.UserPortalContext;
import org.exoplatform.portal.url.PortalURLContext;
import org.exoplatform.web.ControllerContext;
import org.exoplatform.web.WebRequestHandler;
import org.exoplatform.web.url.MimeType;
import org.exoplatform.web.url.URLFactoryService;
import org.exoplatform.web.url.navigation.NavigationResource;
import org.exoplatform.web.url.navigation.NodeURL;

/**
 * This handler resolves legacy request and redirect them to the new URL computed dynamically against the routing table.
 *
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class LegacyRequestHandler extends WebRequestHandler {

    /** . */
    private final URLFactoryService urlFactory;

    /** . */
    private final UserPortalConfigService userPortalService;

    /** . */
    private final UserPortalContext userPortalContext = new UserPortalContext() {
        public ResourceBundle getBundle(UserNavigation navigation) {
            return null;
        }

        public Locale getUserLocale() {
            return Locale.ENGLISH;
        }
    };

    public LegacyRequestHandler(URLFactoryService urlFactory, UserPortalConfigService userPortalService) {
        this.urlFactory = urlFactory;
        this.userPortalService = userPortalService;
    }

    @Override
    public String getHandlerName() {
        return "legacy";
    }

    @Override
    public boolean execute(ControllerContext context) throws Exception {
        String requestSiteName = context.getParameter(PortalRequestHandler.REQUEST_SITE_NAME);
        String requestPath = context.getParameter(PortalRequestHandler.REQUEST_PATH);
        String requestURI = context.getRequest().getRequestURI();

        HttpServletRequest request = context.getRequest();
        HttpServletResponse response = context.getResponse();

        if (requestURI.startsWith(request.getContextPath() + "/private/") && request.getRemoteUser() == null) {
            String doLoginPath = request.getContextPath() + "/login" + "?initialURI=" + request.getRequestURI();
            response.sendRedirect(response.encodeRedirectURL(doLoginPath));
            return true;
        }

        SiteKey siteKey = SiteKey.portal(requestSiteName);
        String uri = requestPath;

        // Resolve the user node if node path is indicated
        if (!requestPath.equals("")) {
            UserPortalConfig cfg = userPortalService.getUserPortalConfig(requestSiteName, request.getRemoteUser(),
                    userPortalContext);
            if (cfg != null) {
                UserPortal userPortal = cfg.getUserPortal();
                UserNodeFilterConfig.Builder builder = UserNodeFilterConfig.builder().withAuthMode(
                        UserNodeFilterConfig.AUTH_READ);
                UserNode userNode = userPortal.resolvePath(builder.build(), requestPath);

                if (userNode != null) {
                    siteKey = userNode.getNavigation().getKey();
                    uri = userNode.getURI();
                }
            }
        }

        //
        PortalURLContext urlContext = new PortalURLContext(context, siteKey);
        NodeURL url = urlFactory.newURL(NodeURL.TYPE, urlContext);

        url.setResource(new NavigationResource(siteKey.getType(), siteKey.getName(), uri));
        url.setMimeType(MimeType.PLAIN);

        Enumeration paraNames = request.getParameterNames();
        while (paraNames.hasMoreElements()) {
            String parameter = paraNames.nextElement().toString();
            url.setQueryParameterValues(parameter, request.getParameterValues(parameter));
        }

        String s = url.toString();

        response.sendRedirect(response.encodeRedirectURL(s));
        return true;
    }

    @Override
    protected boolean getRequiresLifeCycle() {
        return true;
    }
}
