// a client for ZipCodeRList.
// it uses ZipCodeRList as an interface, and test
// all methods by printing all data.

// It reads data from a file containing the service name and city-zip 
// pairs in the following way:
//   city1
//   zip1
//   ...
//   ...
//   end.

import java.io.*;

public class ZipCodeRListClient { 

    // the main takes three arguments:
    // (0) a host. 
    // (1) a port.
    // (2) a service name.
    // (3) a file name as above. 
    public static void main(String[] args) 
	throws IOException
    {
	String host = args[0];
	int port = Integer.parseInt(args[1]);
	String serviceName = args[2];
	BufferedReader in = new BufferedReader(new FileReader(args[3]));

	// locate the registry and get ror.
	SimpleRegistry sr = 
	    LocateSimpleRegistry.getRegistry(host, port);
	RemoteObjectRef ror = sr.lookup(serviceName);

	// get (create) the stub out of ror.
 	ZipCodeRList rl = (ZipCodeRList) ror.localise();

	// reads the data and make a "local" zip code list.
	// later this is sent to the server.
	// again no error check!
	ZipCodeList l = null;
	boolean flag = true;
	while (flag)
	    {
		String city = in.readLine();
		String code = in.readLine();
		if (city == null)
		    flag = false;
		else
		    l = new ZipCodeList(city.trim(), code.trim(), l);
	    }
	// the final value of l should be the initial head of 
	// the list.
	
	// we print out the local zipcodelist.
	System.out.println("This is the original list.");
	ZipCodeList temp = l;
	while (temp !=null)            
	    {
		System.out.println
		    ("city: "+temp.city+", "+
		     "code: "+temp.ZipCode);       
		temp = temp.next;                        
	    }
	
	// test "add".
	System.out.println("testing add.");
	temp = l;
	ZipCodeRList rtemp = rl;
	while (temp !=null)            
	    {
		rl=rl.add(temp.city, temp.ZipCode);
		temp = temp.next;                        
	    }
	System.out.println("add tested.");
	// rl should contain the initial head of the list.

	// test "find" and "next" by printing all. 
	// This is also the test that "add" performed all right.
	System.out.println("\n This is the remote list, printed using find/next.");
	temp = l;
	rtemp = rl;
	while (temp !=null)
	    {
		// here is a test.
		String res = rtemp.find(temp.city);
		System.out.println("city: "+temp.city+", "+
				   "code: "+res);
		temp=temp.next;
		rtemp = rtemp.next();
	    }        		
    }
}