package civitas.common.ballotdesign;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Controller;
   
   import civitas.common.CommonConstants;
   import civitas.common.VoteChoice;
   import civitas.common.ballot.Ballot;
   
  @Controller
  public class CheckBallotAgainstBallotDesign implements CommonConstants {
  
  	@Autowired
  	CalculateBallotLength calculateBallotLength;
  
  	@Autowired
  	CalculatePositionInBallot calculatePositionInBallot;
  
  	public void apply(final BallotDesign that, final Ballot b) {
  
  		if (b.k != that.candidates.length || b.matrix.length != calculateBallotLength.apply(b.k)) {
  			throw new IllegalArgumentException("The ballot's matrix size is not correct.");
  		}
  		for (int i = 0; i < b.k; i++) {
  			for (int j = i + 1; j < b.k; j++) {
  				VoteChoice choice = b.matrix[calculatePositionInBallot.apply(i, j, b.k)];
  				if (null == choice) {
  					throw new IllegalArgumentException("Illegal choice for (" + i + "," + j + ")");
  				}
  			}
  		}
  	}
  }