/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * 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.
 */
package org.apache.sling.sample.slingshot.comments.impl;

import java.io.IOException;

import javax.servlet.ServletException;

import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.sling.SlingServlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.LoginException;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.apache.sling.sample.slingshot.SlingshotConstants;
import org.apache.sling.sample.slingshot.comments.Comment;
import org.apache.sling.sample.slingshot.comments.CommentsService;
import org.apache.sling.sample.slingshot.comments.CommentsUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SlingServlet(methods="POST", extensions="comments", resourceTypes=SlingshotConstants.RESOURCETYPE_ITEM)
public class CommentPostServlet extends SlingAllMethodsServlet {

    private static final long serialVersionUID = 1L;

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Reference
    private ResourceResolverFactory factory;

    @Reference
    private CommentsService commentsService;

    @Override
    protected void doPost(final SlingHttpServletRequest request,
            final SlingHttpServletResponse response)
    throws ServletException, IOException {
        final String title = request.getParameter(CommentsUtil.PROPERTY_TITLE);
        final String text = request.getParameter(CommentsUtil.PROPERTY_TEXT);

        final String userId = request.getRemoteUser();

        logger.debug("New comment from {} : {} - {}", new Object[] {userId, title, text});
        // TODO - check values

        // save comment
        ResourceResolver resolver = null;
        try {
            resolver = factory.getServiceResourceResolver(null);

            final Resource reqResource = resolver.getResource(request.getResource().getPath());

            final Comment c = new Comment();
            c.setTitle(title);
            c.setText(text);
            c.setCreatedBy(userId);

            this.commentsService.addComment(reqResource, c);
        } catch ( final LoginException le ) {
            throw new ServletException("Unable to login", le);
        } finally {
            if ( resolver != null ) {
                resolver.close();
            }
        }

        // send redirect at the end
        final String path = request.getResource().getParent().getPath();

        response.sendRedirect(request.getContextPath() + path + ".html");
    }

}