/*
 *  Copyright 2010 Anyware Services
 *
 *  Licensed 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.
 */
package org.ametys.web.workflow;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.cocoon.components.ContextHelper;

import org.ametys.cms.repository.WorkflowAwareContent;
import org.ametys.core.ui.mail.StandardMailBodyHelper.MailBodyBuilder;
import org.ametys.core.user.User;
import org.ametys.core.util.HttpUtils;
import org.ametys.core.util.URIUtils;
import org.ametys.runtime.config.Config;
import org.ametys.runtime.i18n.I18nizableText;
import org.ametys.web.WebHelper;
import org.ametys.web.repository.content.WebContent;
import org.ametys.web.repository.page.Page;
import org.ametys.web.repository.site.Site;
import org.ametys.web.repository.site.SiteManager;

/**
 * OS workflow function to send mail after an action is triggered.
 */
public class SendMailFunction extends org.ametys.cms.workflow.SendMailFunction
{
    private SiteManager _siteManager;

    @Override
    public void service(ServiceManager smanager) throws ServiceException
    {
        super.service(smanager);
        _siteManager = (SiteManager) smanager.lookup(SiteManager.ROLE);
    }
    @Override
    protected List<String> getSubjectI18nParams (User user, WorkflowAwareContent content)
    {
        List<String> params = super.getSubjectI18nParams(user, content); // {0}
        Site site = _getSite(content);
        if (site != null)
        {
            params.add(site.getTitle());  // {1}
        }
        else
        {
            // fallback to the current site if no site is provided
            String currentSiteName = WebHelper.getSiteName(ContextHelper.getRequest(_context));
            params.add(_siteManager.getSite(currentSiteName).getTitle()); // {1}
        }
        return params;
    }
    
    @Override
    protected MailBodyBuilder getMailBody(String subjectI18nKey, String bodyI18nKey, User user, WorkflowAwareContent content, Map transientVars) throws IOException
    {
        String i18nKey = bodyI18nKey;
        
        Site site = _getSite(content);
        if (site == null)
        {
            i18nKey += "_NOSITE";
        }
        else if (_getPage(content, site) == null)
        {
            // Orphan content
            i18nKey += "_ORPHAN";
        }
        
        return super.getMailBody(subjectI18nKey, i18nKey, user, content, transientVars);
    }
    
    @Override
    protected List<String> getBodyI18nParams(User user, WorkflowAwareContent content)
    {
        List<String> params = new ArrayList<>();
        
        params.add(user.getFullName()); // {0}
        params.add(_contentHelper.getTitle(content)); // {1}
        
        Site site = _getSite(content);
        if (site != null)
        {
            params.add(site.getTitle());  // {2}
        }
        
        Page page = _getPage(content, site);
        if (page != null)
        {
            params.add(page.getTitle());  // {3}
        }
        
        params.add(_getContentUri(content, page, site));  // {2}, {3} or {4} depending on page and site value
        
        return params;
    }
    
    /**
     * Get the site name
     * @param content The content
     * @return the site name
     */
    protected Site _getSite(WorkflowAwareContent content)
    {
        if (content instanceof WebContent)
        {
            return ((WebContent) content).getSite();
        }
        
        return null;
    }

    /**
     * Get the page referenced by this content
     * @param content The content
     * @param site the site
     * @return the page or null.
     */
    protected Page _getPage(WorkflowAwareContent content, Site site)
    {
        if (content instanceof WebContent)
        {
            Iterator<Page> pages = ((WebContent) content).getReferencingPages().iterator();
            if (pages.hasNext())
            {
                return pages.next();
            }
        }
        return null;
    }
    
    /**
     * Get the content uri
     * @param content the content
     * @param page the referencing page. Can be null.
     * @param site The site
     * @return the content uri
     */
    protected String _getContentUri(WorkflowAwareContent content, Page page, Site site)
    {
        String siteName;
        if (site != null)
        {
            siteName = site.getName();
        }
        else
        {
            // fallback to the current site if no site is provided
            siteName = WebHelper.getSiteName(ContextHelper.getRequest(_context));
        }
        
        if (page != null)
        {
            return _getRequestUri() + "/" + siteName + "/index.html?uitool=uitool-page,id:%27" + URIUtils.encodeParameter(page.getId()) + "%27";
        }
        else
        {
            return _contentHelper.getContentBOUrl(content, Map.of("siteName", siteName));
        }
    }
    
    /**
     * Get the request URI.
     * @return the full request URI.
     */
    protected String _getRequestUri()
    {
        return HttpUtils.sanitize(Config.getInstance().getValue("cms.url"));
    }
    
    @Override
    public I18nizableText getLabel()
    {
        return new I18nizableText("plugin.web", "PLUGINS_WEB_SEND_MAIL_FUNCTION_LABEL");
    }
    
}