package kernel.function;
  
  import kernel.Cell;
  import kernel.Formula;

  import kernel.Grid;
  import kernel.LanguageEnum;

  import java.io.Serializable;

  import java.util.HashMap;

  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;

  abstract public class Function implements Formula, Serializable {

  	
  	private static final long serialVersionUID = 1L;

  	private Map<LanguageEnum, String> names = new HashMap<>();
  	private List<Cell> listCells;

  	
  	public Function(List<Cell> listCells) {
  		this.listCells = listCells;
  	}
  	
  	abstract public double eval();
  	

  	public Map<LanguageEnum, String> getNames() {
  		return this.names;
  	}
  	
  	@Override

  	public String getDevelopedFormula() {
  		return names.get(Grid.language) + "("
  				+ this.listCells.stream()
  				.map(Cell::getDevelopedFormula)
  				.collect(Collectors.joining(",")) + ")";
  	}
  	

  	@Override

  	public String toString() {
  		return names.get(Grid.language) + "("
  				+ this.listCells.stream()
  				.map(Cell::getId)
  				.collect(Collectors.joining(",")) + ")";
  	}
  	

  	@Override

  	public boolean createCycle(Cell cell) {

  		return this.listCells.contains(cell) || this.generateIndirectCycle(cell);

  	}
  	

  	@Override

  	public List<Cell> getUtilisedCells() {
  		return this.listCells;
  	}

  	
  	private boolean generateIndirectCycle(Cell cell) {
  		for (Cell currentCell : this.listCells)
  			if (currentCell.containFormula() && currentCell.getFormula().createCycle(cell))
  				return true;
  		
  		return false;
  	}

  }