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package com.bpodgursky.jbool_expressions.rules;

import com.bpodgursky.jbool_expressions.Expression;
import com.bpodgursky.jbool_expressions.Literal;
import com.bpodgursky.jbool_expressions.Not;

public class SimplifyNot extends Rule, K> {

  @Override
  public Expression applyInternal(Not input) {
    Expression e = input.getE();

      if(e instanceof Literal){
        Literal l = (Literal) e;
        return Literal.of(!l.getValue());
      }

      if(e instanceof Not){
        Not internal = (Not) e;
        return internal.getE();
      }
    return input;
  }

  @Override
  protected boolean isApply(Expression input) {
    return input instanceof Not;
  }
}