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;
  	protected Cell leftCell;
  	protected Cell rightCell;
  	
  	public BinaryOperation(Cell leftCell, Cell rightCell) {
  		this.leftCell = leftCell;
  		this.rightCell = rightCell;
  	}
  	
  	abstract public double eval();
  	
  	abstract public String getOperator();
  	
  	public String getDevelopedFormula() {
  		return "(" + this.leftCell.getDevelopedFormula() + this.getOperator() + this.rightCell.getDevelopedFormula() + ")";
  	}
  	
  	public String toString() {
  		return "(" + this.leftCell.getId() + this.getOperator() + this.rightCell.getId() + ")";
  	}
  	
  	public boolean createCycle(Cell cell) {
  		if (this.leftCell.containFormula() && !this.rightCell.containFormula())
  			return this.leftCell.getFormula().createCycle(cell);
  		
  		if (!this.leftCell.containFormula() && this.rightCell.containFormula())
  			return this.rightCell.getFormula().createCycle(cell);
  		
  		if (this.leftCell.containFormula() && this.rightCell.containFormula())
  			return this.leftCell.getFormula().createCycle(cell) && this.rightCell.getFormula().createCycle(cell);
  		
  		return (cell.getId().equals(this.rightCell.getId()) || cell.getId().equals(this.leftCell.getId()));
  	}
  	
  	public List<Cell> getUtilisedCells() {
  		List<Cell> cells = new ArrayList<>();
  		cells.add(this.leftCell);
  		cells.add(this.rightCell);
  		
  		return cells;
  	}

  }