/**
    * .
    */
   package com.github.mkolisnyk.aerial.expressions.value;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.junit.Assert;
  
  import com.github.mkolisnyk.aerial.document.InputRecord;
  import com.github.mkolisnyk.aerial.expressions.ValueExpression;
  import com.github.mkolisnyk.aerial.expressions.ValueExpressionType;
  
  /**
   * @author Myk Kolisnyk
   *
   */
  public class SingleNumericValueExpression extends ValueExpression {
  
      /**
       * @param inputValue
       */
      public SingleNumericValueExpression(InputRecord inputValue) {
          super(inputValue);
      }
  
      /* (non-Javadoc)
       * @see com.github.mkolisnyk.aerial.expressions.ValueExpression#generate()
       */
      @Override
      public List<InputRecord> generate() throws Exception {
          List<InputRecord> result = new ArrayList<InputRecord>();
          InputRecord testRecord = (InputRecord) this.getInput().clone();
          this.validate();
          // Value is set explicitly
          result.add(testRecord);
          result.add(nonCurrentValue(this.getInput()));
          return result;
      }
  
      private InputRecord nonCurrentValue(InputRecord input) {
          InputRecord testRecord;
          Integer intValue = new Integer(input.getValue());
          String updatedValue = "";
          if (intValue == 0) {
              updatedValue = "-1";
          } else {
              updatedValue = "0";
          }
          testRecord = new InputRecord(
                  input.getName(),
                  input.getType(),
                  updatedValue,
                  input.getCondition(),
                  false);
          return testRecord;
      }
  
      /* (non-Javadoc)
       * @see com.github.mkolisnyk.aerial.expressions.ValueExpression#getValueType()
       */
      @Override
      public ValueExpressionType getValueType() {
          return ValueExpressionType.INTEGER;
      }
  
      /* (non-Javadoc)
       * @see com.github.mkolisnyk.aerial.expressions.ValueExpression#getMatchPattern()
       */
      @Override
      public String getMatchPattern() {
          return "(([-0-9])(\\d*))";
      }
  
      /* (non-Javadoc)
       * @see com.github.mkolisnyk.aerial.expressions.ValueExpression#validate()
       */
      @Override
      public void validate() throws Exception {
          super.validate();
          Assert.assertFalse("Unique attribute isn't applicable for fixed value",
                  this.getInput().isUnique());
      }
  }