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package org.apache.samoa.instances;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2014 - 2015 Apache Software Foundation
 * %%
 * 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%
 */

/**
 * 
 * @author abifet
 */
// public int[] m_AttValues; // for DataPoint

public class SingleLabelInstance implements Instance {

  protected double weight;

  protected InstanceData instanceData;

  protected InstanceData classData;

  // Fast implementation without using Objects
  // protected double[] attributeValues;
  // protected double classValue;

  protected InstancesHeader instanceInformation;

  public SingleLabelInstance() {
    // necessary for kryo serializer
  }

  public SingleLabelInstance(SingleLabelInstance inst) {
    this.weight = inst.weight;
    this.instanceData = inst.instanceData; // copy
    this.classData = inst.classData; // copy
    // this.classValue = inst.classValue;
    // this.attributeValues = inst.attributeValues;
    this.instanceInformation = inst.instanceInformation;
  }

  // Dense
  public SingleLabelInstance(double weight, double[] res) {
    this.weight = weight;
    this.instanceData = new DenseInstanceData(res);
    // this.attributeValues = res;
    this.classData = new SingleClassInstanceData();
    // this.classValue = Double.NaN;

  }

  // Sparse
  public SingleLabelInstance(double weight, double[] attributeValues,
      int[] indexValues, int numberAttributes) {
    this.weight = weight;
    this.instanceData = new SparseInstanceData(attributeValues,
        indexValues, numberAttributes); // ???
    this.classData = new SingleClassInstanceData();
    // this.classValue = Double.NaN;
    // this.instanceInformation = new InstancesHeader();

  }

  public SingleLabelInstance(double weight, InstanceData instanceData) {
    this.weight = weight;
    this.instanceData = instanceData; // ???
    // this.classValue = Double.NaN;
    this.classData = new SingleClassInstanceData();
    // this.instanceInformation = new InstancesHeader();
  }

  public SingleLabelInstance(int numAttributes) {
    this.instanceData = new DenseInstanceData(new double[numAttributes]);
    // m_AttValues = new double[numAttributes];
    /*
     * for (int i = 0; i < m_AttValues.length; i++) { m_AttValues[i] =
     * Utils.missingValue(); }
     */
    this.weight = 1;
    this.classData = new SingleClassInstanceData();
    this.instanceInformation = new InstancesHeader();
  }

  @Override
  public double weight() {
    return weight;
  }

  @Override
  public void setWeight(double weight) {
    this.weight = weight;
  }

  @Override
  public Attribute attribute(int instAttIndex) {
    return this.instanceInformation.attribute(instAttIndex);
  }

  @Override
  public void deleteAttributeAt(int i) {
    // throw new UnsupportedOperationException("Not yet implemented");
  }

  @Override
  public void insertAttributeAt(int i) {
    throw new UnsupportedOperationException("Not yet implemented");
  }

  @Override
  public int numAttributes() {
    return this.instanceInformation.numAttributes();
  }

  @Override
  public double value(int instAttIndex) {
    return // attributeValues[instAttIndex]; //
    this.instanceData.value(instAttIndex);
  }

  @Override
  public boolean isMissing(int instAttIndex) {
    return // Double.isNaN(value(instAttIndex)); //
    this.instanceData.isMissing(instAttIndex);
  }

  @Override
  public int numValues() {
    return // this.attributeValues.length; //
    this.instanceData.numValues();
  }

  @Override
  public int index(int i) {
    return // i; //
    this.instanceData.index(i);
  }

  @Override
  public double valueSparse(int i) {
    return this.instanceData.valueSparse(i);
  }

  @Override
  public boolean isMissingSparse(int p) {
    return this.instanceData.isMissingSparse(p);
  }

  @Override
  public double value(Attribute attribute) {
    // throw new UnsupportedOperationException("Not yet implemented");
    // //Predicates.java
    return value(attribute.index());

  }

  @Override
  public String stringValue(int i) {
    throw new UnsupportedOperationException("Not yet implemented");
  }

  @Override
  public double[] toDoubleArray() {
    return // this.attributeValues; //
    this.instanceData.toDoubleArray();
  }

  @Override
  public void setValue(int numAttribute, double d) {
    this.instanceData.setValue(numAttribute, d);
    // this.attributeValues[numAttribute] = d;
  }

  @Override
  public double classValue() {
    return this.classData.value(0);
    // return classValue;
  }

  @Override
  public int classIndex() {
    return instanceInformation.classIndex();
  }

  @Override
  public int numClasses() {
    return this.instanceInformation.numClasses();
  }

  @Override
  public boolean classIsMissing() {
    return // Double.isNaN(this.classValue);//
    this.classData.isMissing(0);
  }

  @Override
  public Attribute classAttribute() {
    return this.instanceInformation.attribute(0);
  }

  @Override
  public void setClassValue(double d) {
    this.classData.setValue(0, d);
    // this.classValue = d;
  }

  @Override
  public Instance copy() {
    SingleLabelInstance inst = new SingleLabelInstance(this);
    return inst;
  }

  @Override
  public Instances dataset() {
    return this.instanceInformation;
  }

  @Override
  public void setDataset(Instances dataset) {
    this.instanceInformation = new InstancesHeader(dataset);
  }

  public void addSparseValues(int[] indexValues, double[] attributeValues,
      int numberAttributes) {
    this.instanceData = new SparseInstanceData(attributeValues,
        indexValues, numberAttributes); // ???
  }

  @Override
  public String toString() {
    StringBuffer text = new StringBuffer();

    for (int i = 0; i < this.numValues(); i++) {
      if (i > 0)
        text.append(",");
      text.append(this.value(i));
    }
    text.append(",").append(this.weight());

    return text.toString();
  }

}