/**********************************************************
* Filename      : GameClient.java 
* Original Author :  Andrew Miller
* Modified by   : Dr. Roger Webster 
*                       (fixed up some exception handling)
* This class interfaces the network classes of the
* GameServer.  Most members are quite self explanatory
**********************************************************/
import java.net.*;
import java.io.*;

// class declaration of GameClient
class GameClient 
{

        private boolean connect_state = false;
        private Socket to_server;
        private DataInputStream in = null;              
        private PrintStream out = null;

public boolean is_connected() 
{
        return connect_state;
}

public boolean running() 
{       
        if (!connect_state || in == null || out == null)
                return true;
        else return false;
}

// return whether or not the string is a names message from the server
public boolean is_nameslist(String text) 
{
        if (text.startsWith("!!names!!")) return true;
        else return false;
}

// return whether or not the string is a directive message from the server
public boolean is_directive(String text) {

        if (text.startsWith("!!directive!!")) return true;
        else return false;
        
}

// return whether or not there is an input stream available
public boolean input_stream_available() {

        try {
                if (in.available() > 0) return true;
        } catch (Exception e) {}
        return false;
}

// return whether or not any of the IO streams are not functioning
public boolean stream_down() {
        if (out == null || in == null) return true;
        else return false;
}

public void disconnect() 
{

   if (out != null && in != null){
        out.println("!!quit!!");         
        out.flush();
        try{
                        out.close();
                        in.close();
                        if (to_server != null)
                        to_server.close();
        }catch(Exception e){}
        connect_state = false;          
    }
   
}

// sends string through socket to server
public void send_stream(String text) 
{

        out.println(text);
        out.flush();
}

// receives string through the socket and returns it
public String get_input() 
{
        try 
        {
                return (in.readLine() + '\n'); 
        } catch (IOException e) {}
        return null;
}


public boolean connect(String host, int port) 
{
        System.out.println("Trying to connect to host is " + host);
        System.out.println("On port  " + port);
        try
        { 
                try
                {  
                        to_server = new Socket(host,port);
                }
                catch(Exception e)
                {
                        System.out.println("new Socket error" + e.toString());
                        return false;
                }

                in = new DataInputStream(new BufferedInputStream(to_server.getInputStream()));
                out = new PrintStream (new
                BufferedOutputStream(to_server.getOutputStream(),1024), false);
        }        
        catch(Exception e)
        {
                System.out.println("Socket error" + e.toString());
                return false;
        }
 
        connect_state = true;
        return true;
}

// cleanup routine that shuts things down 
public void cleanup() 
{

        if (out != null)
        {
                out.println("!!quit!!");
                out.flush();
        }
        try
        {
                if (out != null)
                out.close();
                if (in != null)
                in.close();
                if (to_server != null)
                to_server.close();
        }catch(IOException e){}
        connect_state = false;          // no longer connected
}

} // end class