/*
 * bitdht/bdmgr_multitest.cc
 *
 * BitDHT: An Flexible DHT library.
 *
 * Copyright 2010 by Robert Fernie
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License Version 3 as published by the Free Software Foundation.
 *
 * 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * Please report all bugs and problems to "bitdht@lunamutt.com".
 *
 */


#include "bitdht/bdmanager.h"
#include "bitdht/bdstddht.h"
#include "udp/udplayer.h"
#include "util/bdrandom.h"

#include <stdlib.h>

/**********************************************************************************
 * tests of multi bdnodes all connected together.
 * in these cases, the networking step is shortcut and the ip addresses ignored.
 * instead the port number is used as an index to peers.
 *
 * test1() 
 *     Small cross seeding, and static list of peers.
 *     Set it going - and see what happens.
 */
 
std::map<bdId, bdNodeManager *> nodes;
std::map<struct sockaddr_in, bdId> addrIdx;

int main(int argc, char **argv)
{
	time_t sim_time = 600;
	time_t starttime = time(NULL);
	int    n_nodes = 1000;
	std::map<bdId, bdNodeManager *>::iterator it;
	std::map<bdId, bdNodeManager *>::iterator nit;
	std::map<struct sockaddr_in, bdId>::iterator ait;

	int i, j;

	bdDhtFunctions *fns = new bdStdDht();

	std::cerr << "bdmgr_multitest() Setting up Nodes" << std::endl;
	/* setup nodes */
	for(i = 0; i < n_nodes; i++)
	{
		bdId id;

		bdStdRandomId(&id);

		//id.addr.sin_port = htons(i);
		//((uint32_t *) (id.id.data))[0] = i * 16 * 16; /* force this so the sort order is maintained! */
		std::cerr << "bdmgr_multitest() Id: ";
		fns->bdPrintId(std::cerr, &id);
		std::cerr << std::endl;

		bdNodeManager *mgr = new bdNodeManager(&(id.id), "bdTEST", "", fns);

		/* Store in nodes */
		nodes[id] = mgr;
		/* Store in indices */
		addrIdx[id.addr] = id;

	}

	std::cerr << "bdmgr_multitest() Cross Seeding" << std::endl;
	/* do a little cross seeding */
	for(nit = nodes.begin(); nit != nodes.end(); nit++)
	{
		for(j = 0; j < 2; j++)
		{
			int peeridx = bdRandom::random_u32() % n_nodes;
			for(i = 0, it = nodes.begin(); 
				(i < peeridx) && (it != nodes.end()); i++, it++)
			{
				/* empty */
			}
			if (it != nodes.end())
			{
				nit->second->addPotentialPeer((bdId *) &(it->first), NULL);
			}
		}
	}

	/* ready to run */
	
	std::cerr << "bdmgr_multitest() Simulation Time....." << std::endl;
	i = 0;
	while(time(NULL) < starttime + sim_time)
	{
		i++;
		std::cerr << "bdmgr_multitest() Iteration: " << i << std::endl;

		for(it = nodes.begin(), j = 0; it != nodes.end(); it++, j++)
		{
			/* extract messages to go -> and deliver */
#define MAX_MSG_SIZE	10240
			struct sockaddr_in addr;
			char data[MAX_MSG_SIZE];
			int len = MAX_MSG_SIZE;

			while(it->second->outgoingMsg(&addr, data, &len))
			{
				std::cerr << "bdmgr_multitest() Msg from Peer: " << j;

				/* find the peer */
				ait = addrIdx.find(addr);
				nit = nodes.end();
				if (ait != addrIdx.end())
				{
					nit = nodes.find(ait->second);
					std::cerr << " For: ";
					fns->bdPrintId(std::cerr, &(nit->first));
					std::cerr << std::endl;
				}
				else
				{
					std::cerr << " For Unknown Destination";
					std::cerr << std::endl;

				}

				if (nit != nodes.end())
				{
					/* set from address */
					nit->second->incomingMsg( (sockaddr_in *) &(it->first.addr), data, len);
				}
				/* reset message size */
				len = MAX_MSG_SIZE;
			}
		}

		for(it = nodes.begin(), j = 0; it != nodes.end(); it++, j++)
		{
			/* tick */
			std::cerr << "bdmgr_multitest() Ticking peer: " << j << std::endl;
			it->second->iteration();
		}


		/* have a rest */
		sleep(1);
	}

	std::cerr << "bdmgr_multitest() Displying States"<< std::endl;
	for(it = nodes.begin(), j = 0; it != nodes.end(); it++, j++)
	{
		/* tick */
		std::cerr << "bdmgr_multitest() Peer State: " << j << std::endl;
		it->second->printState();
	}

}