/*
 * Copyright (C) 2003-2011 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.etk.common.utils;

import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.Properties;

import org.etk.common.io.unsync.UnsyncBufferedReader;

/**
 * Created by The eXo Platform SAS
 * Author : eXoPlatform
 *          thanhvucong.78@google.com
 * Aug 5, 2011  
 */
public class SystemEnv {

  public static Properties getProperties() {
    Properties props = new Properties();

    try {
      Runtime runtime = Runtime.getRuntime();
      Process process = null;

      String osName = System.getProperty("os.name").toLowerCase();

      if (osName.indexOf("windows ") > -1) {
        if (osName.indexOf("windows 9") > -1) {
          process = runtime.exec("command.com /c set");
        }
        else {
          process = runtime.exec("cmd.exe /c set");
        }
      }
      else {
        process = runtime.exec("env");
      }

      UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(new InputStreamReader(process.getInputStream()));

      String line;

      while ((line = unsyncBufferedReader.readLine()) != null) {
        int pos = line.indexOf(CharPool.EQUAL);

        if (pos != -1) {
          String key = line.substring(0, pos);
          String value = line.substring(pos + 1);

          props.setProperty(key, value);
        }
      }
    }
    catch (IOException ioe) {
      ioe.printStackTrace();
    }

    return props;
  }

  public static void setProperties(Properties props) {
    Properties envProps = getProperties();

    Enumeration<String> enu = (Enumeration<String>)envProps.propertyNames();

    while (enu.hasMoreElements()) {
      String key = enu.nextElement();

      props.setProperty("env." + key, (String)envProps.get(key));
    }
  }

}