//  Copyright 2009-2010 Aurora Feint, Inc.
// 
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  
//  	http://www.apache.org/licenses/LICENSE-2.0
//  	
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

#pragma once

#import <SystemConfiguration/SystemConfiguration.h>

#import <list>
#import "OFBase.h"
#import "OFIReachabilityObserver.h"

class OFReachability
{
OFDeclareSingleton(OFReachability);
public:
	~OFReachability();

	NetworkReachability gameServerReachability();
	bool isGameServerReachable();
	
	// Warning: You cannot invoke these from an OFIReachabilityObserver callback
	void addObserver(OFIReachabilityObserver* observer);
	void removeObserver(OFIReachabilityObserver* observer);
	
private:
	static void setIsTargetReachableAccordingToFlags(OFReachability* me, SCNetworkReachabilityFlags flags);
	static void networkReachabilityCallBack(SCNetworkReachabilityRef target, SCNetworkReachabilityFlags flags, void *info);
	void updateNetworkReachabilityNow();
	void notifyObservers(NetworkReachability oldReachbilityFlags);
	
	NetworkReachability mGameServerReachability;
	SCNetworkReachabilityRef mReachabilityRef;
	
	typedef std::list<OFIReachabilityObserver*> ObserverSeries;
	ObserverSeries mObservers;
};