/* This file is part of VoltDB.
 * Copyright (C) 2008-2010 VoltDB L.L.C.
 *
 * VoltDB is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * VoltDB 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with VoltDB.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.voltdb.utils;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;

import edu.brown.hstore.conf.HStoreConf;

/**
 * This class just lets you get a PrintStream backed by a file
 * in a standard-ish place. It will create the directory structure
 * if it doesn't exist.
 *
 */
public abstract class BuildDirectoryUtils {

    private static String rootPath;

    public static PrintStream getDebugOutputPrintStream(final String dir, final String filename) {
        String path;
        if (System.getenv("TEST_DIR") != null) {
            path = System.getenv("TEST_DIR") + File.separator + rootPath + dir;
        } else {
            String temp_rootPath = "/tmp/";
            if (rootPath == null && HStoreConf.isInitialized()) {
                synchronized (BuildDirectoryUtils.class) {
                    if (rootPath == null) {
                        rootPath = HStoreConf.singleton().global.temp_dir +
                                   File.separator +
                                   "debugoutput/";
                    }
                } // SYNCH
            }
            if (rootPath != null) temp_rootPath = rootPath;
            assert(temp_rootPath != null);
            path = temp_rootPath + dir;
        }
        File d = new File(path);
        d.mkdirs();
        //if (!success) return null;
        String filepath = path + "/" + filename;
        File f = new File(filepath);
        if (f.exists()) f.delete();
        //if (f.canWrite() == false) return null;
        try {
            return new PrintStream(f);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String getBuildDirectoryPath() {
        String envPath = System.getenv("TEST_DIR");
        if (envPath != null) {
            return envPath;
        } else {
            return ".";
        }
    }
}