package com.erggroup.mass.ant;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import net.sourceforge.clearcase.api.IClearcase;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;

/**
 *
 */
public class Utils
{
	public static PackageVersion getHighestVersion( File packageDirectory )
	{
		return Utils.getHighestVersion(packageDirectory,"mas");
	}

	public static PackageVersion getHighestVersion( File packageDirectory, String scope)
	{
		File[] existing = packageDirectory.listFiles();

		ArrayList versions = new ArrayList(existing.length);
		for ( int i=0; i<existing.length; i++ )
		{
			try
			{
				PackageVersion version = new PackageVersion(existing[i].getName());
				if ( version.getScope().equals(scope) )
				{
					versions.add( version );
				}
			}
			catch ( NumberFormatException x )
			{
				// Ignore
			}
		}

		if ( versions.size() > 0 )
		{
			return (PackageVersion)Collections.max(versions);
		}

		return null;
	}

	/**
	 * Set the working directory for the current project to the VOB root
	 *
	 * @param project the project whose working directory will be set.
	 */
	public static void setWorkingDirectory( IClearcase clearcase, Project project )
	{
		File baseDirectory = project.getBaseDir().getParentFile();
		while ( baseDirectory != null && baseDirectory.getParentFile() != null && baseDirectory.getParentFile().getParentFile() != null )
		{
			baseDirectory = baseDirectory.getParentFile();
		}

		IClearcase.Status chdir = clearcase.cleartool( "cd " + baseDirectory.getAbsolutePath() );
		if ( !chdir.status )
		{
			project.log(chdir.message,Project.MSG_ERR);
			throw new BuildException("Could not change to VOB root directory \'" + baseDirectory.getAbsolutePath() + "\'.");
		}
	}

}