/*

  *   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;

       }

     }

   }

 }