/*
 * Copyright (C) 2012 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.chat.utils;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;
import java.util.logging.Logger;

import org.apache.commons.lang3.StringUtils;

public class PropertyManager {
  private static final Logger LOG = Logger.getLogger(PropertyManager.class.getName());

  private static Properties properties;

  public static final String PROPERTIES_PATH;
  static {
    String chatConf = System.getProperty("exo.chat.conf");
    if (StringUtils.isNotEmpty(chatConf)) {
      PROPERTIES_PATH = chatConf;
    } else {
      String exoConfDir = System.getProperty("exo.conf.dir");
      String tomcatConfDir = System.getProperty("catalina.base");
      String jbossConfDir = System.getProperty("jboss.server.config.dir");
  
      if (StringUtils.isNotEmpty(exoConfDir)) {
        // One-server mode
        PROPERTIES_PATH = exoConfDir + "/chat.properties";
      } else { // Two-server mode
        if (StringUtils.isNotEmpty(tomcatConfDir)) {
          PROPERTIES_PATH = tomcatConfDir + "/conf/chat.properties";
        } else if (StringUtils.isNotEmpty(jbossConfDir)) {
          PROPERTIES_PATH = jbossConfDir + "/chat.properties";
        } else {
          LOG.warning("Impossible to get the path of chat.properties. Use the current folder.");
          PROPERTIES_PATH= "./chat.properties";
        }
      }
    }
  }

  public static final String PROPERTY_SYSTEM_PREFIX = "chat.";
  public static final String EXO_PROPERTY_SYSTEM_PREFIX = "exo.";
  public static final String PROPERTY_SERVICES_IMPLEMENTATION = "servicesImplementation";
  public static final String EXO_BASE_URL = "exo.base.url";
  public static final String PROPERTY_SERVER_TYPE = "dbServerType";
  public static final String PROPERTY_SERVER_HOST = "dbServerHost";
  public static final String PROPERTY_SERVERS_HOSTS = "dbServerHosts";
  public static final String PROPERTY_SERVER_PORT = "dbServerPort";
  public static final String PROPERTY_DB_NAME = "dbName";
  public static final String PROPERTY_DB_AUTHENTICATION = "dbAuthentication";
  public static final String PROPERTY_DB_USER = "dbUser";
  public static final String PROPERTY_DB_PASSWORD = "dbPassword";
  public static final String PROPERTY_CHAT_SERVER_BASE = "chatServerBase";
  public static final String PROPERTY_CHAT_SERVER_URL = "chatServerUrl";
  public static final String PROPERTY_CHAT_PORTAL_PAGE = "chatPortalPage";
  public static final String PROPERTY_INTERVAL_SESSION = "chatIntervalSession";
  public static final String PROPERTY_PASSPHRASE = "chatPassPhrase";
  public static final String PROPERTY_CRON_NOTIF_CLEANUP = "chatCronNotifCleanup";
  public static final String PROPERTY_PUBLIC_ADMIN_GROUP = "publicAdminGroup";
  public static final String PROPERTY_TEAM_ADMIN_GROUP = "teamAdminGroup";
  public static final String PROPERTY_TOKEN_VALIDITY = "chatTokenValidity";
  public static final String PROPERTY_READ_TOTAL_JSON = "chatReadTotalJson";
  public static final String PROPERTY_READ_TOTAL_TXT = "chatReadTotalTxt";

  public static final String PROPERTY_SERVER_TYPE_EMBED = "embed";
  public static final String PROPERTY_SERVER_TYPE_MONGO = "mongo";

  public static final String PROPERTY_SERVICE_IMPL_MONGO = "mongo";
  public static final String PROPERTY_SERVICE_IMPL_JCR = "jcr";

  public static final String PROPERTY_MAIL_PROTOCAL               = "email.smtp.protocal";
  public static final String PROPERTY_MAIL_HOST                   = "email.smtp.host";
  public static final String PROPERTY_MAIL_PORT                   = "email.smtp.port";
  public static final String PROPERTY_MAIL_USER                   = "email.smtp.username";
  public static final String PROPERTY_MAIL_PASSWORD               = "email.smtp.password";
  public static final String PROPERTY_MAIL_FROM                   = "email.smtp.from";
  public static final String PROPERTY_MAIL_STARTTLS_ENABLE        = "email.smtp.starttls.enable";
  public static final String PROPERTY_MAIL_ENABLE_SSL_ENABLE      = "email.smtp.EnableSSL.enable";
  public static final String PROPERTY_MAIL_AUTH                   = "email.smtp.auth";
  public static final String PROPERTY_MAIL_SOCKET_FACTORY_PORT    = "email.smtp.socketFactory.port";
  public static final String PROPERTY_MAIL_SOCKET_FACTORY_CLASS   = "email.smtp.socketFactory.class";
  public static final String PROPERTY_MAIL_SOCKET_FACTORY_FALLBACK= "email.smtp.socketFactory.fallback";
  public static final String PROPERTY_MAIL_SENDER                 = "email.smtp.from";

  public static final String PROPERTY_PLF_USER_STATUS_UPDATE_URL = "plfUsrStatUpdUrl";

  public static final String PROPERTY_REQUEST_TIMEOUT = "request.timeout";

  public static String getProperty(String key)
  {
    String value = (String)properties().get(key);
    if(value!=null){
      return value.trim();
    }
    return null;
  }

  private synchronized static Properties properties()
  {
    if (properties==null)
    {
      properties = new Properties();
      InputStream stream = null;
      try
      {
        stream = new FileInputStream(PROPERTIES_PATH);
        properties.load(stream);
        stream.close();
      }
      catch (Exception e)
      {
        LOG.warning(e.getMessage());
      }

      overridePropertyIfNotSet(PROPERTY_SERVICES_IMPLEMENTATION, PROPERTY_SERVICE_IMPL_MONGO);
      overridePropertyIfNotSet(PROPERTY_SERVER_TYPE, "mongo");
      overridePropertyIfNotSet(PROPERTY_SERVER_HOST, "");
      overridePropertyIfNotSet(PROPERTY_SERVERS_HOSTS, "");
      overridePropertyIfNotSet(PROPERTY_SERVER_PORT, "");
      overridePropertyIfNotSet(PROPERTY_DB_NAME, "chat");
      overridePropertyIfNotSet(PROPERTY_DB_AUTHENTICATION, "false");
      overridePropertyIfNotSet(PROPERTY_DB_USER, "");
      overridePropertyIfNotSet(PROPERTY_DB_PASSWORD, "");
      overridePropertyIfNotSet(PROPERTY_CHAT_SERVER_BASE, "");
      overridePropertyIfNotSet(PROPERTY_CHAT_SERVER_URL, "/chatServer");
      overridePropertyIfNotSet(PROPERTY_CHAT_PORTAL_PAGE, "/portal/intranet/chat");
      overridePropertyIfNotSet(PROPERTY_INTERVAL_SESSION, "60000");
      overridePropertyIfNotSet(PROPERTY_PASSPHRASE, "chat");
      overridePropertyIfNotSet(PROPERTY_CRON_NOTIF_CLEANUP, "0 0/60 * * * ?");
      overridePropertyIfNotSet(PROPERTY_PUBLIC_ADMIN_GROUP, "/platform/administrators");
      overridePropertyIfNotSet(PROPERTY_TEAM_ADMIN_GROUP, "/platform/users");
      overridePropertyIfNotSet(PROPERTY_TOKEN_VALIDITY, "60000");
      overridePropertyIfNotSet(PROPERTY_READ_TOTAL_JSON, "200");
      overridePropertyIfNotSet(PROPERTY_READ_TOTAL_TXT, "2000");

      overridePropertyIfNotSet(PROPERTY_MAIL_PROTOCAL, "smtp");
      overridePropertyIfNotSet(PROPERTY_MAIL_HOST, "localhost");
      overridePropertyIfNotSet(PROPERTY_MAIL_PORT, "25");
      overridePropertyIfNotSet(PROPERTY_MAIL_USER, "");
      overridePropertyIfNotSet(PROPERTY_MAIL_PASSWORD, "");
      overridePropertyIfNotSet(PROPERTY_MAIL_FROM, "eXo Platform");
      overridePropertyIfNotSet(PROPERTY_MAIL_STARTTLS_ENABLE, "false");
      overridePropertyIfNotSet(PROPERTY_MAIL_ENABLE_SSL_ENABLE, "true");
      overridePropertyIfNotSet(PROPERTY_MAIL_AUTH, "false");
      overridePropertyIfNotSet(PROPERTY_MAIL_SOCKET_FACTORY_PORT, "");
      overridePropertyIfNotSet(PROPERTY_MAIL_SOCKET_FACTORY_CLASS, "");
      overridePropertyIfNotSet(PROPERTY_MAIL_SOCKET_FACTORY_FALLBACK, "false");
      overridePropertyIfNotSet(PROPERTY_MAIL_SENDER, "chat@localhost.com");
      
      overridePropertyIfNotSet(PROPERTY_PLF_USER_STATUS_UPDATE_URL, "/rest/state/status/");

      overridePropertyIfNotSet(PROPERTY_REQUEST_TIMEOUT, "15000");
    }
    return properties;
  }

  private static void overridePropertyIfNotSet(String key, String value) {
    if (properties().getProperty(key)==null)
    {
      properties().setProperty(key, value);
    }
    if (System.getProperty(PROPERTY_SYSTEM_PREFIX+key)!=null) {
      properties().setProperty(key, System.getProperty(PROPERTY_SYSTEM_PREFIX+key));
    }
    if (System.getProperty(EXO_PROPERTY_SYSTEM_PREFIX+key)!=null) {
      properties().setProperty(key, System.getProperty(EXO_PROPERTY_SYSTEM_PREFIX+key));
    }

  }

  public static void overrideProperty(String key, String value) {
    properties().setProperty(key, value);
  }

  /**
   * Add ability to re-initialize PropertyManager
   * This method is for making unit test
   */
  public static void forceReload() {
    PropertyManager.properties = null;
  }
}
