package org.openslx.imagemaster;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.openslx.imagemaster.util.Util;

/**
 * Class to hold global constants and properties from 'config/global.properties'.
 */
public class Globals
{

	private static Logger log = Logger.getLogger( Globals.class );
	private static final Properties properties = new Properties();

	/* CONSTANTS */
	/**
	 * The blocksize used for crc'ing.
	 */
	public final static int blockSize = 16 * 1024 * 1024;

	/**
	 * Loads the properties from config/global.properties
	 */
	static
	{
		try {
			// Load properties
			BufferedInputStream stream = new BufferedInputStream( new FileInputStream( "config/global.properties" ) );
			properties.load( stream );
			stream.close();

			// check properties
			Util.notNullOrEmptyFatal( getImageDir(), "Image directory must be set." );
			Util.notNullOrEmptyFatal( getLdapHost(), "Ldap host must be set." );
			Util.notNullOrEmptyFatal( getLdapBindQuery(), "Ldap bind query must be set." );
			Util.notNullOrEmptyFatal( getLdapSearchBaseDn(), "Ldap search base dn must be set." );
			Util.notNullOrEmptyFatal( getLdapSearchFilter(), "Ldap search filter must be set." );
			Util.notNullFatal( getLdapKeystorePassword(), "Ldap keystore password must be set." );
			Util.notNullOrEmptyFatal( getLdapKeystorePath(), "Ldap keystore path must be set." );
			Util.notNullOrEmptyFatal( getSslKeystoreFile(), "SSL keystore file must be set." );
			Util.notNullOrEmptyFatal( getSslKeystoreAlias(), "SSL keystore alias must be set." );
			Util.notNullOrEmptyFatal( getSslKeystorePassword(), "SSL keystore password must be set." );

			Util.notNullFatal( getLdapPort(), "Ldap port must be set." );
			Util.notNullFatal( getSessionTimeoutUser(), "Session timeout user must be set." );
			Util.notNullFatal( getSessionTimeoutServer(), "Session timeout server must be set." );
			Util.notNullFatal( getSslSocketPort(), "SSL socket port must be set." );
			Util.notNullFatal( getSslTimeout(), "SSL socket timeout must be set." );

			if ( getSslTransmitTimes() <= 0 )
				log.fatal( "SSL socket transmitted times must be greater than 0." );

			// check ldap_bind_query
			if ( StringUtils.countMatches( getLdapBindQuery(), "%" ) == 0 ) {
				log.fatal( "ldap_bind_query does not contain '%'" );
				System.exit( 2 );
			}

			// check ldap_search_filter
			if ( StringUtils.countMatches( getLdapSearchFilter(), "%" ) == 0 ) {
				log.fatal( "ldap_search_filter does not contain '%'" );
				System.exit( 2 );
			}

			// check keystore
			if ( !getSslKeystoreFile().endsWith( ".jks" ) ) {
				log.fatal( "Keystore is not in jks format." );
				System.exit( 2 );
			}

			// remove "/" at the end of the paths
			String image = getImageDir();
			if ( image.endsWith( "/" ) ) {
				Globals.properties.put( "image_dir", image.substring( 0, image.length() - 1 ) );
			}

		} catch ( IOException e ) {
			log.fatal( "Could not load properties!" );
			log.warn( e.getStackTrace().toString() );
			System.exit( 2 );
		}
		log.info( "Loaded properties successfully" );
	}

	/* INTEGERS */

	public static int getLdapPort()
	{
		return Util.tryToParseInt( properties.getProperty( "ldap_port" ) );
	}

	public static int getSessionTimeoutUser()
	{
		return Util.tryToParseInt( properties.getProperty( "session_timeout_user" ) );
	}

	public static int getSessionTimeoutServer()
	{
		return Util.tryToParseInt( properties.getProperty( "session_timeout_user" ) );
	}

	public static int getSslSocketPort()
	{
		return Util.tryToParseInt( properties.getProperty( "ssl_socket_port" ) );
	}

	public static int getSslTimeout()
	{
		return Util.tryToParseInt( properties.getProperty( "ssl_socket_timeout" ) );
	}

	public static int getSslTransmitTimes()
	{
		return Util.tryToParseInt( properties.getProperty( "ssl_socket_transmit_times" ) );
	}

	public static int getCrcSchedulingInterval()
	{
		return Util.tryToParseInt( properties.getProperty( "crc_scheduling_interval" ) );
	}

	/* STRINGS */

	public static String getImageDir()
	{
		return properties.getProperty( "image_dir" );
	}

	public static String getSslKeystoreFile()
	{
		return properties.getProperty( "ssl_keystore_file" );
	}

	public static String getSslKeystoreAlias()
	{
		return properties.getProperty( "ssl_keystore_alias" );
	}

	public static String getSslKeystorePassword()
	{
		return properties.getProperty( "ssl_keystore_password" );
	}

	public static String getLdapHost()
	{
		return properties.getProperty( "ldap_host" );
	}

	public static String getLdapBindQuery()
	{
		return properties.getProperty( "ldap_bind_query" );
	}

	public static String getLdapSearchBaseDn()
	{
		return properties.getProperty( "ldap_search_base_dn" );
	}

	public static String getLdapSearchFilter()
	{
		return properties.getProperty( "ldap_search_filter" );
	}

	public static String getLdapKeystorePassword()
	{
		return properties.getProperty( "ldap_keystore_password" );
	}

	public static String getLdapKeystorePath()
	{
		return properties.getProperty( "ldap_keystore_path" );
	}

	/* BOOLEANS */

	public static boolean getLdapSsl()
	{
		return Boolean.valueOf( properties.getProperty( "ldap_ssl" ) );
	}
}