package kernel.operation;

  import kernel.Cell;
  import kernel.Formula;
  

  import java.io.Serializable;

  import java.util.ArrayList;
  import java.util.List;
  

  abstract public class BinaryOperation implements Formula, Serializable {

  	
  	private static final long serialVersionUID = 1L;

  	private Cell leftCell;
  	private Cell rightCell;

  	
  	public BinaryOperation(Cell leftCell, Cell rightCell) {
  		this.leftCell = leftCell;
  		this.rightCell = rightCell;
  	}
  	
  	abstract public double eval();
  	
  	abstract public String getOperator();
  	

  	public Cell getLeftCell() {
  		return this.leftCell;
  	}
  	
  	public Cell getRightCell() {
  		return this.rightCell;
  	}
  	
  	@Override

  	public String getDevelopedFormula() {
  		return "(" + this.leftCell.getDevelopedFormula() + this.getOperator() + this.rightCell.getDevelopedFormula() + ")";
  	}
  	

  	@Override

  	public String toString() {
  		return "(" + this.leftCell.getId() + this.getOperator() + this.rightCell.getId() + ")";
  	}
  	

  	@Override

  	public boolean createCycle(Cell cell) {

  		if (this.createCycleWith(this.leftCell, cell) || this.createCycleWith(this.rightCell, cell))
  			return true;

  		return this.rightCell.equals(cell) || this.leftCell.equals(cell);

  	}
  	

  	@Override

  	public List<Cell> getUtilisedCells() {
  		List<Cell> cells = new ArrayList<>();
  		cells.add(this.leftCell);
  		cells.add(this.rightCell);
  		
  		return cells;
  	}

  	
  	private boolean createCycleWith(Cell cell, Cell current) {
  		return cell.containFormula() && cell.getFormula().createCycle(current);
  	}

  }