/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  The ASF 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.  For additional information regarding
 * copyright in this work, please see the NOTICE file in the top level
 * directory of this distribution.
 */

package org.apache.roller.weblogger.ui.struts2.editor;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.roller.weblogger.WebloggerException;
import org.apache.roller.weblogger.business.WeblogManager;
import org.apache.roller.weblogger.business.WebloggerFactory;
import org.apache.roller.weblogger.pojos.ThemeTemplate;
import org.apache.roller.weblogger.pojos.Weblog;
import org.apache.roller.weblogger.pojos.WeblogTemplate;
import org.apache.roller.weblogger.pojos.WeblogTheme;
import org.apache.roller.weblogger.ui.struts2.util.UIAction;
import org.apache.roller.weblogger.util.Utilities;
import org.apache.roller.weblogger.util.cache.CacheManager;
import org.apache.struts2.convention.annotation.AllowedMethods;

/**
 * Remove a template.
 */
// TODO: make this work @AllowedMethods({"execute","remove","cancel"})
public class TemplateRemove extends UIAction {

    private static Log log = LogFactory.getLog(TemplateRemove.class);

    // id of template to remove
    private String removeId = null;

    // template object that we will remove
    private WeblogTemplate template = null;

    public TemplateRemove() {
        this.actionName = "templateRemove";
        this.desiredMenu = "editor";
        this.pageTitle = "editPages.title.removeOK";
    }

    @Override
    public void myPrepare() {
        if (StringUtils.isNotEmpty(getRemoveId())) {
            try {
                setTemplate(
                    WebloggerFactory.getWeblogger().getWeblogManager().getTemplate(getRemoveId()));
            } catch (WebloggerException ex) {
                log.error("Error looking up template by id - " + getRemoveId(), ex);
                addError("editPages.remove.notFound", getRemoveId());
            }
        }
    }

    /**
     * Display the remove template confirmation.
     */
    @Override
    public String execute() {
        return "confirm";
    }

    /**
     * Remove a new template.
     */
    public String remove() {

        if (getTemplate() != null) {
            try {
                if (!getTemplate().isRequired()
                    || !WeblogTheme.CUSTOM.equals(getActionWeblog().getEditorTheme())) {

                    WeblogManager mgr = WebloggerFactory.getWeblogger().getWeblogManager();

                    // if weblog template remove custom style sheet also
                    if (getTemplate().getName().equals(WeblogTemplate.DEFAULT_PAGE)) {

                        Weblog weblog = getActionWeblog();

                        ThemeTemplate stylesheet = getActionWeblog().getTheme().getStylesheet();

                        // Delete style sheet if the same name
                        if (stylesheet != null
                            && getActionWeblog().getTheme().getStylesheet() != null
                            && stylesheet.getLink().equals(
                            getActionWeblog().getTheme().getStylesheet().getLink())) {

                            // Same so OK to delete
                            WeblogTemplate css =
                                mgr.getTemplateByLink(getActionWeblog(), stylesheet.getLink());

                            if (css != null) {
                                mgr.removeTemplate(css);
                            }
                        }
                    }

                    // notify cache
                    CacheManager.invalidate(getTemplate());
                    mgr.removeTemplate(getTemplate());
                    WebloggerFactory.getWeblogger().flush();

                    return SUCCESS;
                } else {
                    addError("editPages.remove.requiredTemplate");
                }

            } catch (Exception ex) {
                log.error("Error removing page - " + getRemoveId(), ex);
                addError("editPages.remove.error");
            }
        }

        return "confirm";
    }


    @Override
    public String cancel() {
        return CANCEL;
    }

    public String getRemoveId() {
        return removeId;
    }

    public void setRemoveId(String removeId) {
        this.removeId = removeId;
    }

    public WeblogTemplate getTemplate() {
        return template;
    }

    public void setTemplate(WeblogTemplate template) {
        this.template = template;
    }

}