/**
 * 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.testcase.statements.environment;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.evosuite.runtime.testdata.EvoSuiteFile;
import org.evosuite.testcase.TestCase;
import org.evosuite.testcase.variable.VariableReference;
import org.evosuite.utils.Randomness;
import org.evosuite.utils.StringUtil;
import org.objectweb.asm.commons.GeneratorAdapter;


/**
 * This class is a wrapper for a string that represents a filename
 *
 * @author fraser
 */
public class FileNamePrimitiveStatement extends EnvironmentDataStatement<EvoSuiteFile> {

	private static final long serialVersionUID = 4402006999670328128L;

	/**
	 * <p>Constructor for FileNamePrimitiveStatement.</p>
	 *
	 * @param tc a {@link org.evosuite.testcase.TestCase} object.
	 * @param value a {@link org.evosuite.runtime.testdata.EvoSuiteFile} object.
	 */
	public FileNamePrimitiveStatement(TestCase tc, EvoSuiteFile value) {
		super(tc, EvoSuiteFile.class, value);
	}

    @Override
    public String getTestCode(String varName){
        String testCode = "";
        VariableReference retval = getReturnValue();
        Object value = getValue();

        if (value != null) {
            String escapedPath = StringUtil.getEscapedString(((EvoSuiteFile) value).getPath());
            testCode += ((Class<?>) retval.getType()).getSimpleName() + " "
                    + varName + " = new "
                    + ((Class<?>) retval.getType()).getSimpleName() + "(\""
                    + escapedPath + "\");\n";
        } else {
            testCode += ((Class<?>) retval.getType()).getSimpleName() + " "
                    + varName + " = null;\n";
        }
        return testCode;
    }

	/* (non-Javadoc)
	 * @see org.evosuite.testcase.PrimitiveStatement#delta()
	 */
	/** {@inheritDoc} */
	@Override
	public void delta() {
		randomize();
	}

	/* (non-Javadoc)
	 * @see org.evosuite.testcase.PrimitiveStatement#zero()
	 */
	/** {@inheritDoc} */
	@Override
	public void zero() {
		// there does not exist a zero value for files
	}

	/* (non-Javadoc)
	 * @see org.evosuite.testcase.PrimitiveStatement#randomize()
	 */
	/** {@inheritDoc} */
	@Override
	public void randomize() {
		String path = Randomness.choice(tc.getAccessedEnvironment().getViewOfAccessedFiles());
		if (path != null) {
			setValue(new EvoSuiteFile(path));
		} else {
			setValue(null); // FIXME find out why this case can actually happen! (I don't think we want this?)
		}
		logger.debug("Randomized filename: " + value);
	}

	private void writeObject(ObjectOutputStream oos) throws IOException {
		oos.defaultWriteObject();		
		oos.writeObject(value);
	}

	private void readObject(ObjectInputStream ois) throws ClassNotFoundException,
	        IOException {
		ois.defaultReadObject();
		value = (EvoSuiteFile) ois.readObject();
	}
}