/*

 *   SONEWS News Server

 *   see AUTHORS for the list of contributors

 *

 *   This program 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.

 *

 *   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 General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.sonews.config;

/**

 * Configuration facade class.

 * @author Christian Lins

 * @since sonews/1.0

 */

public class Config extends AbstractConfig

{

  public static final int LEVEL_CLI     = 1;

  public static final int LEVEL_FILE    = 2;

  public static final int LEVEL_BACKEND = 3;

  public static final String CONFIGFILE = "sonews.configfile";

    /** BackendConfig key constant. Value is the maximum article size in kilobytes. */

  public static final String ARTICLE_MAXSIZE   = "sonews.article.maxsize";

  /** BackendConfig key constant. Value: Amount of news that are feeded per run. */

  public static final String EVENTLOG          = "sonews.eventlog";

  public static final String FEED_NEWSPERRUN   = "sonews.feed.newsperrun";

  public static final String FEED_PULLINTERVAL = "sonews.feed.pullinterval";

  public static final String HOSTNAME          = "sonews.hostname";

  public static final String PORT              = "sonews.port";

  public static final String TIMEOUT           = "sonews.timeout";

  public static final String LOGLEVEL          = "sonews.loglevel";

  public static final String MLPOLL_DELETEUNKNOWN = "sonews.mlpoll.deleteunknown";

  public static final String MLPOLL_HOST       = "sonews.mlpoll.host";

  public static final String MLPOLL_PASSWORD   = "sonews.mlpoll.password";

  public static final String MLPOLL_USER       = "sonews.mlpoll.user";

  public static final String MLSEND_ADDRESS    = "sonews.mlsend.address";

  public static final String MLSEND_RW_FROM    = "sonews.mlsend.rewrite.from";

  public static final String MLSEND_RW_SENDER  = "sonews.mlsend.rewrite.sender";

  public static final String MLSEND_HOST       = "sonews.mlsend.host";

  public static final String MLSEND_PASSWORD   = "sonews.mlsend.password";

  public static final String MLSEND_PORT       = "sonews.mlsend.port";

  public static final String MLSEND_USER       = "sonews.mlsend.user";

  /** Key constant. If value is "true" every I/O is written to logfile

   * (which is a lot!)

   */

  public static final String DEBUG              = "sonews.debug";

  /** Key constant. Value is classname of the JDBC driver */

  public static final String STORAGE_DBMSDRIVER = "sonews.storage.dbmsdriver";

  /** Key constant. Value is JDBC connect String to the database. */

  public static final String STORAGE_DATABASE   = "sonews.storage.database";

  /** Key constant. Value is the username for the DBMS. */

  public static final String STORAGE_USER       = "sonews.storage.user";

  /** Key constant. Value is the password for the DBMS. */

  public static final String STORAGE_PASSWORD   = "sonews.storage.password";

  /** Key constant. Value is the name of the host which is allowed to use the

   *  XDAEMON command; default: "localhost" */

  public static final String XDAEMON_HOST       = "sonews.xdaemon.host";

  /** The config key for the filename of the logfile */

  public static final String LOGFILE = "sonews.log";

  public static final String[] AVAILABLE_KEYS = {

      ARTICLE_MAXSIZE,

      EVENTLOG,

      FEED_NEWSPERRUN,

      FEED_PULLINTERVAL,

      HOSTNAME,

      MLPOLL_DELETEUNKNOWN,

      MLPOLL_HOST,

      MLPOLL_PASSWORD,

      MLPOLL_USER,

      MLSEND_ADDRESS,

      MLSEND_HOST,

      MLSEND_PASSWORD,

      MLSEND_PORT,

      MLSEND_RW_FROM,

      MLSEND_RW_SENDER,

      MLSEND_USER,

      PORT,

      TIMEOUT,

      XDAEMON_HOST

  };

  private static Config instance = new Config();

  public static Config inst()

  {

    return instance;

  }

  private Config(){}

  @Override

  public String get(String key, String def)

  {

    String val = CommandLineConfig.getInstance().get(key, null);

    if(val == null)

    {

      val = FileConfig.getInstance().get(key, null);

    }

    if(val == null)

    {

      val = BackendConfig.getInstance().get(key, def);

    }

    return val;

  }

  public String get(int maxLevel, String key, String def)

  {

    String val = CommandLineConfig.getInstance().get(key, null);

    if(val == null && maxLevel >= LEVEL_FILE)

    {

      val = FileConfig.getInstance().get(key, null);

      if(val == null && maxLevel >= LEVEL_BACKEND)

      {

        val = BackendConfig.getInstance().get(key, def);

      }

    }

    return val != null ? val : def;

  }

  @Override

  public void set(String key, String val)

  {

    set(LEVEL_BACKEND, key, val);

  }

  public void set(int level, String key, String val)

  {

    switch(level)

    {

      case LEVEL_CLI:

      {

        CommandLineConfig.getInstance().set(key, val);

        break;

      }

      case LEVEL_FILE:

      {

        FileConfig.getInstance().set(key, val);

        break;

      }

      case LEVEL_BACKEND:

      {

        BackendConfig.getInstance().set(key, val);

        break;

      }

    }

  }

}