/**
 * Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite 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 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */
/**
 * 
 */
package org.evosuite.assertion;

import java.util.HashSet;
import java.util.Set;

import org.evosuite.Properties;
import org.evosuite.regression.ObjectDistanceCalculator;
import org.evosuite.testcase.variable.VariableReference;


/**
 * <p>PrimitiveTraceEntry class.</p>
 *
 * @author Gordon Fraser
 */
public class PrimitiveTraceEntry implements OutputTraceEntry {

	protected VariableReference var;

	protected Object value;

	/**
	 * <p>Constructor for PrimitiveTraceEntry.</p>
	 *
	 * @param var a {@link org.evosuite.testcase.variable.VariableReference} object.
	 * @param value a {@link java.lang.Object} object.
	 */
	public PrimitiveTraceEntry(VariableReference var, Object value) {
		this.var = var;
		this.value = value;
	}

	/* (non-Javadoc)
	 * @see org.evosuite.assertion.OutputTraceEntry#differs(org.evosuite.assertion.OutputTraceEntry)
	 */
	/** {@inheritDoc} */
	@Override
	public boolean differs(OutputTraceEntry other) {
		if (other instanceof PrimitiveTraceEntry) {
			PrimitiveTraceEntry otherEntry = (PrimitiveTraceEntry) other;
			if (!value.equals(otherEntry.value))
				return true;
		}
		return false;
	}

	/* (non-Javadoc)
	 * @see org.evosuite.assertion.OutputTraceEntry#getAssertion(org.evosuite.assertion.OutputTraceEntry)
	 */
	/** {@inheritDoc} */
	@Override
	public Set<Assertion> getAssertions(OutputTraceEntry other) {
		Set<Assertion> assertions = new HashSet<Assertion>();
		if (other instanceof PrimitiveTraceEntry) {
			PrimitiveTraceEntry otherEntry = (PrimitiveTraceEntry) other;
			if (otherEntry != null && otherEntry.value != null && value != null
					&& var.getStPosition() == otherEntry.var.getStPosition())
				if (!value.equals(otherEntry.value)) {
					double distance = ObjectDistanceCalculator.getObjectDistance(value, otherEntry.value);
					if(distance==0)
						return assertions;
					PrimitiveAssertion assertion = new PrimitiveAssertion();
					assertion.value = value;
					assertion.source = var;
					if(Properties.isRegression())
						assertion.setComment("// (Primitive) Original Value: " + value
								+ " | Regression Value: " + otherEntry.value);
					assertions.add(assertion);
					assert (assertion.isValid());
				}
		}
		return assertions;
	}

	/* (non-Javadoc)
	 * @see org.evosuite.assertion.OutputTraceEntry#getAssertion()
	 */
	/** {@inheritDoc} */
	@Override
	public Set<Assertion> getAssertions() {
		Set<Assertion> assertions = new HashSet<Assertion>();
		PrimitiveAssertion assertion = new PrimitiveAssertion();
		assertion.source = var;
		assertion.value = value;
		assertions.add(assertion);
		assert (assertion.isValid());

		return assertions;
	}

	/* (non-Javadoc)
	 * @see org.evosuite.assertion.OutputTraceEntry#isDetectedBy(org.evosuite.assertion.Assertion)
	 */
	/** {@inheritDoc} */
	@Override
	public boolean isDetectedBy(Assertion assertion) {
		if (assertion instanceof PrimitiveAssertion) {
			PrimitiveAssertion ass = (PrimitiveAssertion) assertion;
			if (var.same(ass.source))
				return !value.equals(ass.value);
		}
		return false;
	}

	/* (non-Javadoc)
	 * @see org.evosuite.assertion.OutputTraceEntry#cloneEntry()
	 */
	/** {@inheritDoc} */
	@Override
	public OutputTraceEntry cloneEntry() {
		return new PrimitiveTraceEntry(var, value);
	}

}