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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%
 */

import java.text.SimpleDateFormat;

/**
 * @author abifet
 */
public class DenseInstance extends SingleLabelInstance {

  private static final long serialVersionUID = 280360594027716737L;

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

  public DenseInstance(double weight, double[] res) {
    super(weight, res);
  }

  public DenseInstance(SingleLabelInstance inst) {
    super(inst);
  }

  public DenseInstance(Instance inst) {
    super((SingleLabelInstance) inst);
  }

  public DenseInstance(double numberAttributes) {
    super((int) numberAttributes);
    // super(1, new double[(int) numberAttributes-1]);
    // Add missing values
    // for (int i = 0; i < numberAttributes-1; i++) {
    // //this.setValue(i, Double.NaN);
    // }

  }

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

    //append all attributes except the class attribute.
    for (int attIndex = 0; attIndex < this.numAttributes()-1; attIndex++) {
      if (!this.isMissing(attIndex)) {
        if (this.attribute(attIndex).isNominal()) {
          int valueIndex = (int) this.value(attIndex);
          String stringValue = this.attribute(attIndex).value(valueIndex);
          text.append(stringValue).append(",");
        } else if (this.attribute(attIndex).isNumeric()) {
          text.append(this.value(attIndex)).append(",");
        } else if (this.attribute(attIndex).isDate()) {
          SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
          text.append(dateFormatter.format(this.value(attIndex))).append(",");
        }
      } else {
        text.append("?,");
      }
    }
    //append the class value at the end of the instance.
    text.append(this.classAttribute().value((int)classValue()));

    return text.toString();
  }
}