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package com.sun.enterprise.webservice;

import com.sun.logging.LogDomains;
import com.sun.enterprise.util.SystemPropertyConstants;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.ServerHelper;
import com.sun.enterprise.config.serverbeans.HttpListener;
import com.sun.enterprise.server.ApplicationServer;
import java.util.logging.Level;

import java.util.logging.Logger;

/**
 * This class contains utility code used by the WS-TX system apps (such as
 * calculating the addresses of their ws endpoints).
 *
 * @author Ryan.Shoemaker@Sun.COM
 * @version $Revision: 1.3 $
 * @since 1.0
 */
public class WsTxUtils {

    private static Logger logger = 
        LogDomains.getLogger(LogDomains.EJB_LOGGER);
    
    /**
     * Get the hostname and port of the secure or non-secure http listener for the default
     * virtual server in this server instance.  The string representation will be of the
     * form 'hostname:port'.
     *
     * @param secure true if you want the secure port, false if you want the non-secure port
     * @return the 'hostname:port' combination or null if there were any errors calculating the address
     */
    public static String getDefaultVirtualServerHostAndPort(boolean secure) {
        final String host = getHostName();
        final String port = getPort(secure);
        if ((host == null) || (port == null)) {
            return null;
        }
        return host + ":" + port;
    }

    /**
     * Lookup the canonical host name of the system this server instance is running on.
     *
     * @return the canonical host name or null if there was an error retrieving it
     */
    private static String getHostName() {
        // this value is calculated from InetAddress.getCanonicalHostName when the AS is
        // installed.  asadmin then passes this value as a system property when the server
        // is started.
        return System.getProperty(SystemPropertyConstants.HOST_NAME_PROPERTY);
    }

    /**
     * Get the http/https port number for the default virtual server of this server instance.
     * <p/>
     * If the 'secure' parameter is true, then return the secure http listener port, otherwise
     * return the non-secure http listener port.
     *
     * @param secure true if you want the secure port, false if you want the non-secure port
     * @return the port or null if there was an error retrieving it.
     */
    private static String getPort(boolean secure) {
        try {
            ConfigContext configContext = ApplicationServer.getServerContext().getConfigContext();
            final String serverName = System.getProperty(SystemPropertyConstants.SERVER_NAME);
            Config config = ServerHelper.getConfigForServer(configContext, serverName);
            final HttpListener[] listeners = config.getHttpService().getHttpListener();
            for (HttpListener listener : listeners) {
                if ((secure) && (listener.isSecurityEnabled())) {
                    return listener.getPort();
                } else if ((!secure) && (!listener.isSecurityEnabled())) {
                    return listener.getPort();
                }
            }
        } catch (Throwable t) {
            // error condition handled in wsit code
            logger.log(Level.FINEST, "Exception occurred retrieving port " +
                "configuration for WSTX service", t);
        }
        return null;
    }
}