package com.yahoo.labs.samoa.moa.core;

/*
 * #%L
 * SAMOA
 * %%
 *    Copyright (C) 2013 RWTH Aachen University, Germany
 * %%
 * 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.
 * #L%
 */

import java.util.HashMap;
import java.util.Iterator;
import java.util.TreeSet;

import com.yahoo.labs.samoa.instances.Attribute;
import com.yahoo.labs.samoa.instances.DenseInstance;
import com.yahoo.labs.samoa.instances.Instance;

public class DataPoint extends DenseInstance{
    
	private static final long serialVersionUID = 1L;
	
	protected int timestamp;
    private HashMap<String, String> measure_values;
    
    protected int noiseLabel;

    public DataPoint(Instance nextInstance, Integer timestamp) {
        super(nextInstance);
        this.setDataset(nextInstance.dataset());
        this.timestamp = timestamp;
        measure_values = new HashMap<String, String>();
        
        Attribute classLabel = dataset().classAttribute();
        noiseLabel = classLabel.indexOfValue("noise");		// -1 returned if there is no noise
    }

    public void updateWeight(int cur_timestamp, double decay_rate){
        setWeight(Math.pow(2,(-1.0)*decay_rate*(cur_timestamp-timestamp)));
    }

    public void setMeasureValue(String measureKey, double value){
        synchronized(measure_values){
            measure_values.put(measureKey, Double.toString(value));
        }
    }

    public void setMeasureValue(String measureKey,String value){
        synchronized(measure_values){
            measure_values.put(measureKey, value);
        }
    }

    public String getMeasureValue(String measureKey){
        if(measure_values.containsKey(measureKey))
            synchronized(measure_values){
                return measure_values.get(measureKey);
            }
        else
            return "";
    }

    public int getTimestamp(){
        return timestamp;
    }
    
    public String getInfo(int x_dim, int y_dim) {
        StringBuffer sb = new StringBuffer();
        sb.append("<html><table>");
        sb.append("<tr><td>Point</td><td>"+timestamp+"</td></tr>");
        for (int i = 0; i < numAttributes() - 1; i++) { //m_AttValues.length
            String label = "Dim "+i;
            if(i == x_dim)
                 label = "<b>X</b>";
            if(i == y_dim)
                 label = "<b>Y</b>";
            sb.append("<tr><td>"+label+"</td><td>"+value(i)+"</td></tr>");
        }
        sb.append("<tr><td>Decay</td><td>"+weight()+"</td></tr>");
        sb.append("<tr><td>True cluster</td><td>"+classValue()+"</td></tr>");
        sb.append("</table>");
        sb.append("<br>");
        sb.append("<b>Evaluation</b><br>");
        sb.append("<table>");

        TreeSet<String> sortedset;
        synchronized(measure_values){
            sortedset = new TreeSet<String>(measure_values.keySet());
        }

        Iterator miterator = sortedset.iterator();
         while(miterator.hasNext()) {
             String key = (String)miterator.next();
             sb.append("<tr><td>"+key+"</td><td>"+measure_values.get(key)+"</td></tr>");
         }

        sb.append("</table></html>");
        return sb.toString();
    }

    public double getDistance(DataPoint other){
        double distance = 0.0;
        int numDims = numAttributes();
        if(classIndex()!=0) numDims--;

        for (int i = 0; i < numDims; i++) {
            double d = value(i) - other.value(i);
            distance += d * d;
        }
        return Math.sqrt(distance);
    }

    
    public boolean isNoise() {
		return (int)classValue() == noiseLabel;
	}
    
    public double getNoiseLabel() {
    	return noiseLabel;
    }
}