/* ======================================================================
   Parts Copyright 2006 University of Leeds, Oxford University, University of the Highlands and Islands.

   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.bodington.servlet.facilities;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Collections;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;
import org.bodington.server.BuildingServerException;
import org.bodington.server.realm.Permission;
import org.bodington.server.resources.Resource;
import org.bodington.server.resources.TextBlockResource;
import org.bodington.servlet.Request;


/**
 * Class to handle the web interface to Text Block resources.
 * @author Colin Tatham
 */


public class TextBlockFacility extends Facility
{
    private static Logger log = Logger.getLogger(TextBlockFacility.class);

    public Resource newResource()
    {
        return new TextBlockResource();
    }

    public boolean canCopy( Resource resource )
    {
        return true;
    }
    
    public List initResource( HttpServletRequest request, Resource newResource )
    {
        if (newResource instanceof TextBlockResource)
        {
            TextBlockResource textBlock = (TextBlockResource) newResource;
            String displayTitle = request.getParameter( "displayTitle" );
            if ( displayTitle != null )
            {
                textBlock.setDisplayTitle( true );
            }            
        }
        else
        {
            throw new IllegalArgumentException("Resource must be a TextBlockResource");
        }
        return super.initResource(request, newResource);
    }
    
    public boolean initResource( Resource original_resource, Resource new_resource )
    throws BuildingServerException
    {
        if ( !(new_resource instanceof TextBlockResource) )
            throw new BuildingServerException(
                "Error: The wrong type of resource was created." );
        
        int flags;
        
        flags = ((TextBlockResource)original_resource).getTextBlockFlags();
        ((TextBlockResource)new_resource).setTextBlockFlags( flags );
        
        return true;
    }
    
    public void insert(Request req, PrintWriter out, String command, String insertname)
    throws ServletException, IOException
    {
        log.debug(" TextBlockFacility insert()");

        if (!(req.getResource() instanceof TextBlockResource))
        {
            String message = "Wrong type of resource found, expecting TextBlock resource";
            log.error(message);
            return;
        }

        TextBlockResource textblock = (TextBlockResource) req.getResource();

        if (command.equalsIgnoreCase("modifyproperties"))
        {
            if (req.getParameter("savesettings") != null)
            {
                // Save button has been pushed...   
                if (req.getParameter("displayTitle") != null && !textblock.isDisplayTitle())
                {
                    textblock.setDisplayTitle(true);
                    textblock.setUnsaved();
                }
                else if (req.getParameter("displayTitle") == null && textblock.isDisplayTitle())
                {
                    textblock.setDisplayTitle(false);
                    textblock.setUnsaved();
                }
                
                if (textblock.isUnsaved())
                {
                    try
                    {
                        textblock.save();
                    }
                    catch (BuildingServerException e)
                    {
                        log.debug( "Error updating TextBlock resource.", e );
                    }
                }
            }
            return;
        }
        
        if (command.equalsIgnoreCase("displayTitle"))
        {
            if (textblock.isDisplayTitle()) out.print("checked");
            return;
        }
        
        super.insert(req, out, command, insertname);
    }

    protected void resourceMenuItem(Resource resource, Request breq,
        PrintWriter out, ResourceMenuOutputState state, int depth, int highlight)
        throws IOException, BuildingServerException
    {
        String title, href = null, target = null, content;
        boolean displayTitle = false, manage = false;

        manage = resource.checkPermission(Permission.MANAGE);
        displayTitle = ((TextBlockResource)resource).isDisplayTitle();

        href = (!state.rootless && depth == 1) ? null : (breq.getContextPath()
            + breq.getServletPath() + resource.getFullName());

        target = "_top";

        // heading level for title line matches depth but there are only
        // six heading levels in HTML so stop there.
        int hlevel = (depth > 6) ? 6 : depth;
        int level = ((depth - 1) % 10) + 1;

        // title in heading with appropriate class attribute
        out.print("          <h");
        out.print(hlevel);

        /* TODO:
         *  - Create CSS class for textblock display?.
         */
        out.print(" class=\"" + state.css_class_prefix
            + "_heading_node_title\">");

        if (displayTitle)
        {
            title = resource.getTitle();
            out.print("<strong>");
            out.print(title);
            out.print("</strong>");
        }

        if (href != null && manage)
        {
            out.print("&nbsp;<a");
            if (target != null)
            {
                out.print(" target=\"");
                out.print(target);
                out.print("\"");
            }
            out.print(" href=\"");
            out.print(href);
            out.print("\" title=\"Manage Text Block.\"><span style=\"font-size: x-small\"><sup>Manage</sup></span></a>");
        }

        out.print("</h"); // end of node_title
        out.print(hlevel);
        out.println(">");

        content = resource.getDescription();

        content = (content == null) ? "" : content;

        out.print("<div class=\"" + state.css_class_prefix + "_node_content");

        if (depth == 1)
        {// was commented out in orig code??
            out.print("_without_stalk");
        }
        out.print("_lev");
        out.print(level);
        out.print("_hl");
        out.print(highlight);
        out.print("\">");

        out.print(content);

        String markup = timedResourceText(resource);
        if (markup != null)
            out.print("<div>" + markup + "</div>");

        out.print("</div>");
        out.print( "<div class=\"clearer\">&nbsp;</div>\n");
    }
    
    public boolean isResourceAtDefaultURL()
    {
        return false;
    }
}
