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;
      }

  }