package echo;

import java.io.*;
import java.net.*;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import utils.PropertyHandler;


/**
 * Simple Echo Client
 * 
 * @author wolfdieterotte
 */
public class EchoClient implements Runnable 
{
    
    // references to receiver/sender
    static EchoClientThread sender = null;

    // server connectivity information
    private static String serverIP = null;
    private static int serverPort = 0;
    
    // socket to server
    private static Socket socket = null;
    
    
    /**
     * Constructor, initializing connectivity information to EchoServer
     * 
     * @param propertiesFile Properties file name 
     */
    public EchoClient (String propertiesFile)
    {
        Properties properties = null;
        
        // open properties
        try
        {
            properties = new PropertyHandler(propertiesFile);
        }
        catch (IOException ex)
        {
            Logger.getLogger(EchoClient.class.getName()).log(Level.SEVERE, "Cannot open properties file", ex);
            System.exit(1);
        }

        // get server IP
        try
        {
            serverIP = properties.getProperty("SERVER_IP");
        }
        catch (Exception ex)
        {
            Logger.getLogger(EchoClient.class.getName()).log(Level.SEVERE, "Cannot read server IP", ex);
            System.exit(1);
        }
        
        // get server port
        try
        {
            serverPort = Integer.parseInt(properties.getProperty("SERVER_PORT"));
        }
        catch (NumberFormatException ex)
        {
            Logger.getLogger(EchoClient.class.getName()).log(Level.SEVERE, "Cannot read server port", ex);
            System.exit(1);
        }
    }
    
    
    @Override
    /**
     * Implementation of interface Runnable
     * 
     * Called by main() to start the EchoClientThread
     */
    public void run() {
        // start the receiver
        (new EchoClientThread(serverIP, serverPort)).start();
    }


    /**
     * Get the ball rolling
     * 
     * @param args
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {

        String propertiesFile = null;
        
        try
        {
            propertiesFile = args[0];
        }
        catch (ArrayIndexOutOfBoundsException ex)
        {
            propertiesFile = "config/Server.properties";
        }

        // start EchoClient
        (new EchoClient(propertiesFile)).run();
    }
}