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package org.netbeans.server.uihandler.statistics;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.TreeMap;

import java.util.logging.Level;

import java.util.logging.LogRecord;

import java.util.logging.Logger;

import java.util.prefs.BackingStoreException;

import java.util.prefs.Preferences;

import javax.servlet.jsp.PageContext;

import org.netbeans.modules.exceptions.entity.Exceptions;

import org.netbeans.modules.exceptions.utils.PersistenceUtils;

import org.netbeans.server.uihandler.Statistics;

import org.netbeans.server.uihandler.Utils;

import org.netbeans.server.uihandler.statistics.ExceptionReports.Data;

/**

 *

 * @author Jindrich Sedek

 */

public class ExceptionReports extends Statistics<ExceptionReports.Data>{

    private static Logger LOG = Logger.getLogger(ExceptionReports.class.getName());

    public ExceptionReports() {

        super("ExceptionReports");

    }

    protected Data newData() {

        return null;

    }

    protected Data process(LogRecord rec) {

        return null;

    }

    protected Data join(Data one, Data two) {

        return null;

    }

    protected Data finishSessionUpload(String userId, int sessionNumber, boolean initialParse, Data data) {

        return null;

    }

    @Override

    protected void registerPageContext(PageContext page, String name, Data data) {

        Data dat = new Data();

        Map<String, Integer> result = new TreeMap<String, Integer>();

        try {

            PersistenceUtils pUtils = Utils.getPersistenceUtils();

            dat.globalReportsNumber = pUtils.count(Exceptions.class);

            List<String> list = pUtils.getDistinct(Exceptions.class, "component");

            Iterator<String> iter = list.iterator();

            int minimumToShow = dat.globalReportsNumber / 50; // 2%

            while (iter.hasNext()){

                //List<String> list =  iter.next();

                String str = iter.next();

                int count = pUtils.count(Exceptions.class, "entity.component = '" + str+"'");

                if ((str != null)&&(count > minimumToShow)) result.put(str, count);

            }

        } catch (Exception ex) {

            // requires database and that is not present

            LOG.log(Level.WARNING, ex.getMessage(), ex);

        }

        dat.components = result;

        super.registerPageContext(page, name, dat);

    }

    public static final class Data{

        int globalReportsNumber;

        Map<String, Integer> components;

        public Data(){

            globalReportsNumber = 0;

        }

        public Data(int global){

            globalReportsNumber = global;

        }

        public int getGlobalReportsNumber(){

            return globalReportsNumber;

        }

        public Map<String, Integer> getComponents(){

            if (components!= null) return components;

            else return Collections.emptyMap();

        }

        public List<String> getSortedKeys(){

            List<String> list = new ArrayList(components.keySet());

            Collections.sort(list, new ReportsComparator());

            return list;

        }

        private final class ReportsComparator implements Comparator<String>{

            public int compare(String o1, String o2) {

                return components.get(o2).compareTo(components.get(o1));

            }

        }

    }

    protected void write(Preferences pref, Data d) throws BackingStoreException {

        // data are saved in DB for this statistics

    }

    protected Data read(Preferences pref) throws BackingStoreException {

        return null; // nothing is needed to be done

    }

}