/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.tools;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.httpclient.HttpClient;
import org.apache.xmlrpc.XmlRpcException;
import org.apache.xmlrpc.client.XmlRpcClient;
import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;
import org.apache.xmlrpc.client.XmlRpcCommonsTransportFactory;

/**
 * Handles XMLRPC connections to BugZilla.
 * 
 * @author Marco Boeck
 */
public class XmlRpcHandler {
	
	public static final String BUGZILLA_URL = "http://bugs.rapid-i.com";
	
	private static final String BUGZILLA_APPENDIX = "xmlrpc.cgi";
	
	
	/**
	 * Handles the login to a given BugZilla XmlRpc server.
	 * 
	 * @param serverURL the URL to the server, e.g. "http://my.bug-server.com"
	 * @param login the BugZilla login
	 * @param password the BugZilla password
	 * @return the logged in XmlRpcClient instance
	 * @throws MalformedURLException
	 * @throws XmlRpcException
	 */
	public static synchronized XmlRpcClient login(String serverURL, String login, char[] password) throws MalformedURLException, XmlRpcException {
		String server;
		if (serverURL.endsWith("/")) {
			server = serverURL + BUGZILLA_APPENDIX;
		} else {
			server = serverURL + "/" + BUGZILLA_APPENDIX;
		}
		
		HttpClient httpClient = new HttpClient();
        XmlRpcClient rpcClient = new XmlRpcClient();
        XmlRpcCommonsTransportFactory factory = new XmlRpcCommonsTransportFactory(rpcClient);
        XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();

        factory.setHttpClient(httpClient);
        rpcClient.setTransportFactory(factory);
        config.setServerURL(new URL(server));
        rpcClient.setConfig(config);

        // map of the login data
        Map<String, String> loginMap = new HashMap<String, String>();
        loginMap.put("login", login);
        loginMap.put("password", new String(password));
        loginMap.put("rememberlogin", "true");
        
        Map resultMap = (Map)rpcClient.execute("User.login", new Object[]{ loginMap });
        LogService.getRoot().fine("Logged into BugZilla at '" + serverURL + "' as user '" + resultMap.get("id") + "'.");
        
        for (int i=0; i<password.length; i++) {
        	password[i] = 0;
		}
        
        return rpcClient;
	}

}