package kernel.function;
  
  import kernel.Cell;

  import kernel.LanguageEnum;

  import java.util.List;

  import java.util.OptionalDouble;

  
  public class Average extends Function {

  	
  	public Average(List<Cell> listCells) {
  		super(listCells);

  		this.getNames().put(LanguageEnum.FR, "MOYENNE");
  		this.getNames().put(LanguageEnum.EN, "AVERAGE");

  	}
  	

  	@Override

  	public double eval() {

  		OptionalDouble average = this.getUtilisedCells().stream().mapToDouble(Cell::getValue).average();

  		
  		return average.isPresent() ? average.getAsDouble() : 0.;
  	}

  }