/*
 * ClientShell.java
 *
 * Copyright (c) 2013, The CRISTAL Consortium. All rights reserved.
 *
 * CRISTAL kernel is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library. If not, see:
 * http://www.gnu.org/licenses/
 */

package com.c2kernel.process;

import java.util.Scanner;

import com.c2kernel.entity.proxy.AgentProxy;
import com.c2kernel.scripting.Script;

public class ClientShell extends StandardClient {

	AgentProxy user;
	Script console;
	
	public ClientShell(String username, String pass) throws Exception {
		user = Gateway.connect(username, pass);
		console = new Script("javascript", user, System.out);
	}
	
	public void run() {
		@SuppressWarnings("resource") // closing the scanner closes system.in
		Scanner scan = new Scanner(System.in);
		System.out.print("> ");
		while (scan.hasNextLine()) {
			String command = scan.nextLine();
			console.setScript(command);
			try {
	        	Object response = console.execute();
	        	if (response == null)
	        		System.out.println("Ok");
	        	else
	        		System.out.println(response);
			} catch (Throwable ex) {
				ex.printStackTrace();
			}
			System.out.print("> ");
		}
		close();
	}

	public static void main(String[] args) throws Exception {
		Gateway.init(readC2KArgs(args));
		@SuppressWarnings("resource") // closing the scanner closes system.in
		Scanner scan = new Scanner(System.in);
		int loginAttempts = 0;
		ClientShell shell = null;
		while (shell == null && loginAttempts++ < 3) {
			System.out.print("User:");
			String username = scan.nextLine();
			System.out.print("Password:");
			String pass = scan.nextLine();
			try {
				shell = new ClientShell(username, pass);
			} catch (Exception ex) {
				System.err.println(ex.getMessage());
			}
		}
		if (shell == null) {
			System.err.println("Bye");
			System.exit(0);
		}
		shell.run();
			
	}

}