/*
    * #%L
    * prolobjectlink-jpi-tuprolog
    * %%
    * Copyright (C) 2019 Prolobjectlink Project
    * %%
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Lesser General Public License as 
    * published by the Free Software Foundation, either version 2.1 of the 
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Lesser Public License for more details.
   * 
   * You should have received a copy of the GNU General Lesser Public 
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/lgpl-2.1.html>.
   * #L%
   */
  package io.github.prolobjectlink.prolog.tuprolog;
  
  import java.util.AbstractSet;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Set;
  
  import alice.tuprolog.Operator;
  import alice.tuprolog.Prolog;
  import io.github.prolobjectlink.prolog.AbstractOperator;
  import io.github.prolobjectlink.prolog.PrologOperator;
  import io.github.prolobjectlink.prolog.PrologOperatorSet;
  
  /**
   * 
   * @author Jose Zalacain
   * @since 1.0
   */
  final class TuPrologOperatorSet extends AbstractSet<PrologOperator> implements PrologOperatorSet {
  
  	private final Set<PrologOperator> operators;
  	private final List<Operator> operatorsList;
  
  	public TuPrologOperatorSet() {
  		Prolog engine = new Prolog();
  		operatorsList = engine.getOperatorManager().getOperators();
  		operators = new HashSet<PrologOperator>(operatorsList.size());
  		for (Operator operator : operatorsList) {
  			String name = operator.name;
  			int priority = operator.prio;
  			String specifier = operator.type;
  			AbstractOperator op = new TuPrologOperator(priority, specifier, name);
  			operators.add(op);
  		}
  	}
  
  	public boolean currentOp(String opreator) {
  		for (Operator op : operatorsList) {
  			if (op.name.equals(opreator)) {
  				return true;
  			}
  		}
  		return false;
  	}
  
  	@Override
  	public Iterator<PrologOperator> iterator() {
  		return operators.iterator();
  	}
  
  	@Override
  	public int size() {
  		return operators.size();
  	}
  
  	@Override
  	public int hashCode() {
  		final int prime = 31;
  		int result = super.hashCode();
  		result = prime * result + operators.hashCode();
  		return result;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		if (this == obj)
  			return true;
  		if (!super.equals(obj))
  			return false;
  		TuPrologOperatorSet other = (TuPrologOperatorSet) obj;
  		return operators.equals(other.operators);
  
  	}
  
  }