/**
 *  Copyright (C) 2010 Cloud.com, Inc.  All rights reserved.
 * 
 * This software is licensed under the GNU General Public License v3 or later.
 * 
 * It is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package com.cloud.user;

import org.apache.log4j.Logger;

import com.cloud.utils.ProcessUtil;


public class UserContext {
    private static final Logger s_logger = Logger.getLogger(UserContext.class);
	
	private static ThreadLocal<UserContext> s_currentContext = new ThreadLocal<UserContext>();
	
	private Long userId;
	private Long accountId;
	private String sessionId;

	private boolean apiServer;
	
	private static UserContext s_nullContext = new UserContext(); 
	
	public UserContext() {
	}
	
	public UserContext(Long userId, Long accountId, String sessionId, boolean apiServer) {
		this.userId = userId;
		this.accountId = accountId;
		this.sessionId = sessionId;
		this.apiServer = apiServer;
	}
	
	public long getUserId() {
		if(userId != null)
			return userId.longValue();

		if(!apiServer) 
			s_logger.warn("Null user id in UserContext " + ProcessUtil.dumpStack());
		
		return 0;
	}

	public void setUserId(Long userId) {
		this.userId = userId;
	}

	public long getAccountId() {
		if(accountId != null)
			return accountId.longValue();
		
		if(!apiServer)
			s_logger.warn("Null account id in UserContext " + ProcessUtil.dumpStack());
		return 0;
	}

	public void setAccountId(Long accountId) {
		this.accountId = accountId;
	}
	
	public String getSessionId() {
		return sessionId;
	}

	public void setSessionKey(String sessionId) {
		this.sessionId = sessionId;
	}
	
	public boolean isApiServer() {
		return apiServer;
	}

	public void setApiServer(boolean apiServer) {
		this.apiServer = apiServer;
	}

	public static UserContext current() {
		UserContext context = s_currentContext.get();
		if(context == null)
			return s_nullContext;
		return context;
	}
	
	public static void updateContext(Long userId, Long accountId, String sessionId) {
		UserContext context = current();
		assert(context != null) : "Context should be already setup before you can call this one";
		
		context.setUserId(userId);
		context.setAccountId(accountId);
		context.setSessionKey(sessionId);
	}
	
	public static void registerContext(Long userId, Long accountId, String sessionId, boolean apiServer) {
		s_currentContext.set(new UserContext(userId, accountId, sessionId, apiServer));
	}
	
	public static void unregisterContext() {
		s_currentContext.set(null);
	}
}