// [Licence]
// The Ariba-Underlay Copyright
//
// Copyright (c) 2008-2009, Institute of Telematics, Universität Karlsruhe (TH)
//
// Institute of Telematics
// Universität Karlsruhe (TH)
// Zirkel 2, 76128 Karlsruhe
// Germany
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation
// are those of the authors and should not be interpreted as representing
// official policies, either expressed or implied, of the Institute of
// Telematics.
// [Licence]

#ifndef _ONE_HOP_H
#define _ONE_HOP_H

#include <map>
#include "ariba/overlay/modules/OverlayInterface.h"
#include "ariba/overlay/modules/onehop/messages/OneHopMessage.h"
#include "ariba/overlay/modules/onehop/messages/NodeListingRequest.h"
#include "ariba/overlay/modules/onehop/messages/NodeListingReply.h"
#include "ariba/utility/logging/Logging.h"

using std::map;
using ariba::overlay::OverlayInterface;
using ariba::overlay::OneHopMessage;
using ariba::overlay::NodeListingRequest;
using ariba::overlay::NodeListingReply;

namespace ariba {
namespace overlay {

class OneHop : public OverlayInterface {
	use_logging_h( OneHop );
public:
	OneHop(
		BaseOverlay& _overlay,
		const NodeID& _nodeid,
		OverlayStructureEvents* _eventsReceiver
	);

	virtual ~OneHop();

protected:

	//
	// OverlayInterface.h
	//

	virtual void createOverlay();
	virtual void deleteOverlay();

	virtual void joinOverlay(const EndpointDescriptor& bootstrapEp = EndpointDescriptor::UNSPECIFIED);
	virtual void leaveOverlay();

	virtual const EndpointDescriptor& resolveNode( const NodeID& node );
	virtual void routeMessage( const NodeID& destnode, Message* msg );

	virtual NodeList getKnownNodes() const;

	//
	// see ServiceInterface.h and OverlayInterface.h
	//

	virtual void onLinkUp( const LinkID& link, const NodeID& local, const NodeID& remote );
	virtual void onLinkDown( const LinkID& link, const NodeID& local, const NodeID& remote );
	virtual bool receiveMessage( const Message* message, const LinkID& link, const NodeID& node );

private:

	/**
	 * The other nodes in the overlay
	 */
	typedef map<const NodeID,const LinkID> OverlayNodeMapping;
	OverlayNodeMapping overlayNodes;

	/**
	 * The current state of the overlay
	 */
	typedef enum _OneHopState {
		OneHopStateInvalid                = 0,
		OneHopStateJoinInitiated          = 1,
		OneHopStateJoinListingRequested   = 2,
		OneHopStateCompleted              = 3,
	} OneHopState;

	OneHopState state;

	uint16_t pendingLinks;
	LinkID bootstrapLink;

};

}} // namespace ariba, overlay

#endif // _ONE_HOP_H