package civitas.common.encryptedchoice;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Controller;
   
   import civitas.common.VoteChoice;
   import civitas.crypto.ciphertextlist.CiphertextList;
   import civitas.crypto.oneoflreencryption.ConstructElGamal1OfLReencryption;
   import civitas.crypto.oneoflreencryption.ElGamal1OfLReencryption;
  import civitas.crypto.publickey.ElGamalPublicKey;
  import civitas.crypto.reencryptfactor.ElGamalReencryptFactor;
  import civitas.crypto.reencryptfactor.GenerateElGamalReencryptFactor;
  
  @Controller
  public class EncryptChoice {
  
  	@Autowired
  	ConstructElGamal1OfLReencryption constructElGamal1OfLReencryption;
  
  	@Autowired
  	GenerateElGamalReencryptFactor generateElGamalReencryptFactor;
  
  	public EncryptedChoice apply(
  			final ElGamalPublicKey key, final CiphertextList ciphertexts, final VoteChoice[] cbMatrix, final int pos) {
  		VoteChoice choice = cbMatrix[pos];
  		ElGamalReencryptFactor encChoiceFactor = generateElGamalReencryptFactor.apply(key.params);
  		ElGamal1OfLReencryption encChoice =
  				constructElGamal1OfLReencryption.apply(key, ciphertexts, choice.ordinal(), encChoiceFactor);
  		return new EncryptedChoice(encChoiceFactor, encChoice);
  	}
  }