/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apereo.portal.portlets.dynamicskin;

import java.io.IOException;
import java.util.Enumeration;
import java.util.SortedSet;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletMode;
import javax.portlet.PortletModeException;
import javax.portlet.PortletPreferences;
import javax.portlet.ReadOnlyException;
import javax.portlet.RenderRequest;
import javax.portlet.ValidatorException;
import javax.portlet.WindowState;
import javax.portlet.WindowStateException;

import org.apereo.portal.portlets.dynamicskin.storage.DynamicSkinService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.portlet.bind.annotation.ActionMapping;
import org.springframework.web.portlet.bind.annotation.RenderMapping;

/**
 * DynamicRespondrSkin portlet includes a CONFIG mode interface that allows an admin to set various
 * skin properties. Supports the optional 'dynamic' strategy for skinning Respondr.
 *
 * @since 4.1.0
 */
@Controller
@RequestMapping("CONFIG")
public class DynamicRespondrSkinConfigController {
    protected final Logger log = LoggerFactory.getLogger(getClass());

    @Autowired private DynamicSkinService skinService;

    @ActionMapping(params = "action=update")
    public void updateSkinConfiguration(
            ActionRequest request, ActionResponse response, PortletPreferences prefs)
            throws IOException, ReadOnlyException, ValidatorException, PortletModeException {

        // Get the list of preferences and pull them from the request and store into preferences
        Enumeration<String> preferenceNames = prefs.getNames();
        while (preferenceNames.hasMoreElements()) {
            String name = preferenceNames.nextElement();
            if ("PREFdynamicSkinName".equals(name)) {
                SortedSet<String> skins = skinService.getSkinNames(request);
                String formValue = request.getParameter(name);
                if (skins.contains(formValue)) {
                    log.debug("Skin name {} found", formValue);
                    prefs.setValue(name, formValue != null ? formValue : "");
                } else {
                    log.warn("Skin name {} is not recognized", formValue);
                }
            } else if (name.startsWith(DynamicRespondrSkinConstants.CONFIGURABLE_PREFIX)) {
                String formValue = request.getParameter(name);
                prefs.setValue(name, formValue != null ? formValue : "");
            }
        }

        prefs.store();
        log.debug("Saved updated configuration");

        response.setPortletMode(PortletMode.VIEW);
    }

    @ActionMapping(params = "action=cancel")
    public void cancelUpdate(ActionResponse response)
            throws IOException, ReadOnlyException, ValidatorException, PortletModeException,
                    WindowStateException {
        response.setPortletMode(PortletMode.VIEW);

        // When the config is displayed in a lightbox, need
        // to make sure we break out of exclusive mode.  Normally,
        // this is handled via the lightbox JS code.  The lightbox
        // JS doesn't support rewriting URLs set via JS though.  So,
        // instead just do it here.
        response.setWindowState(WindowState.NORMAL);
    }

    /** Display a form to manage skin choices. */
    @RenderMapping
    public String showConfigPage(
            RenderRequest request, PortletPreferences preferences, Model model) {
        // Add skin names
        SortedSet<String> skins = skinService.getSkinNames(request);
        model.addAttribute("skinNames", skins);

        // Get the list of preferences and add them to the model
        Enumeration<String> preferenceNames = preferences.getNames();
        while (preferenceNames.hasMoreElements()) {
            String name = preferenceNames.nextElement();
            if (name.startsWith(DynamicRespondrSkinConstants.CONFIGURABLE_PREFIX)) {
                model.addAttribute(name, preferences.getValue(name, ""));
            }
        }

        return "jsp/DynamicRespondrSkin/skinConfig";
    }
}