package com.sequencelogic;

import java.util.Date;

import com.sequencelogic.K2Client;
import com.sequencelogic.K2ClientConstants;

public class K2Client
{
	public static final int 	  PORT_DEFAULT = K2ClientConstants.DEFAULT_UDP_PORT;
	public static final String     INFO_PREFIX = K2ClientConstants.MESSAGE_PREFIX_FROM_CLOUD;
	public static final String      INT_PREFIX = K2ClientConstants.MESSAGE_PREFIX_INTERNAL;
	public static final String      ERR_PREFIX = K2ClientConstants.MESSAGE_PREFIX_INTERNAL+K2ClientConstants.MESSAGE_2ND_PREFIX_FOR_ERRORS;
	public static final String   STATUS_PREFIX = K2ClientConstants.MESSAGE_PREFIX_DEVICE_STATUS;
	
	/**
	 * The supplied class must provide a static method that takes a single String which is the "info" 
	 * sent by the Daemon to this client.
	 * E.g. initialize("localhost:32000", "SyncAndMessageDispatch", "k2dataReceived")
	 * @param classLoader null or classLoader (Tomcat)
	 * @param hosts bar delimited set of hosts with optional ports
	 * @param urn device URN
	 */
    public native void initialize(Object classLoader, String callbackClassNameDotted, String hosts, String urn);
    public native void shutdown();
    public native void login();
    public native void logout();
    public native String statistics();
    
    /**
     * Get notified when an office in the provided list changes online/offline state.
     * Your callbackClassNameDotted.k2dataReceived method will be invoked with:
     * <p>
     * 'status:' - <status value>:deviceURN for a device with a status change
     * within an office subscribed via K2_StatusSelect(offices).
	 * </p>
	 * <p>
     * <status value> may be one of the following:
     * <ul>
     * <li>'online' - device is online
     * <li>'offline' - device is offline
     * <li>Example: 'online:urn:sl:000000:F4685A6B:8F4D:'
     * </ul>
     * </p>
     * @param offices comma delimited list of "urn:iono:000000:12345678::"
     */
    public native void statusSelect(String offices);
    
    /**
     * Used only by CG.
     */
    public native void pollDB();

    static {
    	System.out.println("[JAVA] " + new Date() + " K2Client static init");
    	Exception here = new Exception("YOU ARE HERE: " + K2Client.class.getClassLoader());
    	here.fillInStackTrace();
    	//here.printStackTrace(System.out);
		System.out.println("[JAVA] LD_LIBRARY_PATH (Linux): " + System.getenv("LD_LIBRARY_PATH"));
		System.out.println("[JAVA] DYLD_LIBRARY_PATH (OSX): " + System.getenv("DYLD_LIBRARY_PATH"));
    	try
    	{
    		System.out.println("[JAVA] " + new Date() + " Loading K2Client... " + System.getProperty("java.library.path"));
    		System.loadLibrary("K2Client");
    		System.out.println("[JAVA] " + new Date() + " K2Client Loaded native libraries!");
    	}
    	catch (Throwable ex){
    		System.err.println("[JAVA] " + new Date() + " FATAL: K2Client Unable to load shared library: " + ex.getMessage());
    		ex.printStackTrace();
    		//throw ex;
    	}
    }
	
    public K2Client(){
    	//System.out.println("[JAVA] " + new Date() + " K2Client -CONSTRUCTED-");
    }
}