// yacysearchitem.java
// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 28.08.2007 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// LICENSE
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.util.EventTracker;

import de.anomic.data.LibraryProvider;
import de.anomic.search.Navigator;
import de.anomic.search.QueryParams;
import de.anomic.search.SearchEvent;
import de.anomic.search.SearchEventCache;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.graphics.ProfilingGraph;


public class yacysearchtrailer {

    private static final int MAX_TOPWORDS = 10;
    
    public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
        final serverObjects prop = new serverObjects();
        
        final String eventID = post.get("eventID", "");
        final int display = post.getInt("display", 0);
        
        // find search event
        final SearchEvent theSearch = SearchEventCache.getEvent(eventID);
        if (theSearch == null) {
            // the event does not exist, show empty page
            return prop;
        }
        final QueryParams theQuery = theSearch.getQuery();
        
        // compose search navigation

        // namespace navigators
        List<Navigator.Item> namespaceNavigator = theSearch.getNamespaceNavigator(10);
        if (namespaceNavigator == null || namespaceNavigator.isEmpty()) {
            prop.put("nav-namespace", 0);
        } else {
            prop.put("nav-namespace", 1);
            Navigator.Item entry;
            int i;
            for (i = 0; i < Math.min(10, namespaceNavigator.size()); i++) {
                entry = namespaceNavigator.get(i);
                prop.put("nav-namespace_element_" + i + "_name", entry.name);
                prop.put("nav-namespace_element_" + i + "_url", "<a href=\"" + QueryParams.navurl("html", 0, display, theQuery, theQuery.urlMask.toString(), "inurl:" + entry.name, theQuery.navigators) + "\">" + entry.name + " (" + entry.count + ")</a>");
                prop.putJSON("nav-namespace_element_" + i + "_url-json", QueryParams.navurl("json", 0, display, theQuery, theQuery.urlMask.toString(), "inurl:" + entry.name, theQuery.navigators));
                prop.put("nav-namespace_element_" + i + "_count", entry.count);
                prop.put("nav-namespace_element_" + i + "_modifier", "inurl:" + entry.name);
                prop.put("nav-namespace_element_" + i + "_nl", 1);
            }
            i--;
            prop.put("nav-namespace_element_" + i + "_nl", 0);
            prop.put("nav-namespace_element", namespaceNavigator.size());
        }
        
        // host navigators
        List<Navigator.Item> hostNavigator = theSearch.getHostNavigator(10);
        if (hostNavigator == null || hostNavigator.isEmpty()) {
            prop.put("nav-domains", 0);
        } else {
            prop.put("nav-domains", 1);
            Navigator.Item entry;
            int i;
            for (i = 0; i < Math.min(10, hostNavigator.size()); i++) {
                entry = hostNavigator.get(i);
                prop.put("nav-domains_element_" + i + "_name", entry.name);
                prop.put("nav-domains_element_" + i + "_url", "<a href=\"" + QueryParams.navurl("html", 0, display, theQuery, theQuery.urlMask.toString(), "site:" + entry.name, theQuery.navigators) + "\">" + entry.name + " (" + entry.count + ")</a>");
                prop.putJSON("nav-domains_element_" + i + "_url-json", QueryParams.navurl("json", 0, display, theQuery, theQuery.urlMask.toString(), "site:" + entry.name, theQuery.navigators));
                prop.put("nav-domains_element_" + i + "_count", entry.count);
                prop.put("nav-domains_element_" + i + "_modifier", "site:" + entry.name);
                prop.put("nav-domains_element_" + i + "_nl", 1);
            }
            i--;
            prop.put("nav-domains_element_" + i + "_nl", 0);
            prop.put("nav-domains_element", hostNavigator.size());
        }
        
        // author navigators
        List<Navigator.Item> authorNavigator = theSearch.getAuthorNavigator(10);
        if (authorNavigator == null || authorNavigator.isEmpty()) {
            prop.put("nav-authors", 0);
        } else {
            prop.put("nav-authors", 1);
            Navigator.Item entry;
            int i;
            String anav;
            for (i = 0; i < Math.min(10, authorNavigator.size()); i++) {
                entry = authorNavigator.get(i);
                anav = (entry.name.indexOf(' ') < 0) ? "author:" + entry.name : "author:'" + entry.name + "'";
                prop.put("nav-authors_element_" + i + "_name", entry.name);
                prop.put("nav-authors_element_" + i + "_url", "<a href=\"" + QueryParams.navurl("html", 0, display, theQuery, theQuery.urlMask.toString(), anav, theQuery.navigators) + "\">" + entry.name + " (" + entry.count + ")</a>");
                prop.putJSON("nav-authors_element_" + i + "_url-json", QueryParams.navurl("json", 0, display, theQuery, theQuery.urlMask.toString(), anav, theQuery.navigators));
                prop.put("nav-authors_element_" + i + "_count", entry.count);
                prop.put("nav-authors_element_" + i + "_modifier", "author:'" + entry.name + "'");
                prop.put("nav-authors_element_" + i + "_nl", 1);
            }
            i--;
            prop.put("nav-authors_element_" + i + "_nl", 0);
            prop.put("nav-authors_element", authorNavigator.size());
        }

        // topics navigator
        List<Navigator.Item> topicNavigator = theSearch.getTopicNavigator(10);
        if (topicNavigator == null || topicNavigator.isEmpty()) {
            topicNavigator = new ArrayList<Navigator.Item>(); 
            prop.put("nav-topics", "0");
        } else {
            prop.put("nav-topics", "1");
            int i = 0;
            Navigator.Item e;
            Iterator<Navigator.Item> iter = topicNavigator.iterator();
            while (iter.hasNext()) {
                e = iter.next();
                if (/*(theQuery == null) ||*/ (theQuery.queryString == null)) break;
                if (e != null && e.name != null) {
                    prop.putHTML("nav-topics_element_" + i + "_name", e.name);
                    prop.put("nav-topics_element_" + i + "_url", "<a href=\"" + QueryParams.navurl("html", 0, display, theQuery, theQuery.urlMask.toString(), e.name, theQuery.navigators) + "\">" + e.name + " (" + e.count + ")</a>");
                    prop.putJSON("nav-topics_element_" + i + "_url-json", QueryParams.navurl("json", 0, display, theQuery, theQuery.urlMask.toString(), e.name, theQuery.navigators));
                    prop.put("nav-topics_element_" + i + "_count", e.count);
                    prop.put("nav-topics_element_" + i + "_modifier", e.name);
                    prop.put("nav-topics_element_" + i + "_nl", (iter.hasNext() && i < MAX_TOPWORDS) ? 1 : 0);
                }
                if (i++ > MAX_TOPWORDS) {
                    break;
                }
            }
            prop.put("nav-topics_element", i);
        }
        
        // about box
        String aboutBody = env.getConfig("about.body", "");
        String aboutHeadline = env.getConfig("about.headline", "");
        if ((aboutBody.length() == 0 && aboutHeadline.length() == 0) ||
            theSearch.getRankingResult().getLocalIndexCount() +
            theSearch.getRankingResult().getRemoteResourceSize() == 0) {
            prop.put("nav-about", 0);
        } else {
            prop.put("nav-about", 1);
            prop.put("nav-about_headline", aboutHeadline);
            prop.put("nav-about_body", aboutBody);
        }
        
        // category: location search
        // show only if there is a location database present and if there had been any search results
        if (LibraryProvider.geoLoc.locations() == 0 ||
            theSearch.getRankingResult().getLocalIndexCount() == 0) {
            prop.put("cat-location", 0);
        } else {
            prop.put("cat-location", 1);
            prop.put("cat-location_query", theQuery.queryString(true));
            prop.put("cat-location_queryenc", theQuery.queryString(true).replace(' ', '+'));
            prop.put("cat-location_display", display);
        }
        
        EventTracker.update(EventTracker.EClass.SEARCH, new ProfilingGraph.searchEvent(theQuery.id(true), SearchEvent.Type.FINALIZATION, "bottomline", 0, 0), false);
        
        return prop;
    }

}