#include "PingPong.h"
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>

using namespace ariba;

namespace ariba {
namespace application {
namespace pingpong {

// logging
use_logging_cpp( PingPong );

// the service that the pingpong wants to use
ServiceID PingPong::PINGPONG_SERVICEID = ServiceID( 111 );

// construction
PingPong::PingPong( string config)  :
        node(),
        counter( 0 ),
        pingId( 0 ),
        config_file(config)
{
	Timer::setInterval( 5000 );
}

// destruction
PingPong::~PingPong() {
}

// implementation of the startup interface
void PingPong::startup()
{
    using boost::property_tree::ptree;
    using boost::property_tree::json_parser::read_json;
    
	// set up logging
	logging_rootlevel_debug();
	logging_classlevel_debug(PingPong);

	logging_info( "[PINGPONG]\t starting up PingPong service ... " );

    // read config
    ptree config;
    try
    {
        read_json(config_file, config);
    }
    catch ( exception& e )
    {
        logging_warn("ERROR: Failed to read config file »" << config_file << "«: ");
        logging_warn(e.what());
        logging_warn("---> Using fallback config.");
        
        config.put("ariba.spovnet_name", "pingpong");
    }
    
    // use node name also in the application
    name = config.get("ariba.node_name", "NO_NAME");
    
	// bind communication and node listener
	node.bind( this );                              /*NodeListener*/
	node.bind( this, PingPong::PINGPONG_SERVICEID); /*CommunicationListener*/

    // connecting
    logging_debug( "connecting ... " );

	node.connect(config.get_child("ariba"));

	// ping pong started up...
	logging_info( "[PINGPONG]\t pingpong starting up with"
			<< " [spovnetid " << node.getSpoVNetId().toString() << "]"
			<< " and [nodeid " << node.getNodeId().toString() << "]" );
}

// implementation of the startup interface
void PingPong::shutdown() {

	logging_info( "[PINGPONG]\t pingpong service starting shutdown sequence ..." );

	// stop timer
	Timer::stop();

	// leave spovnet
	node.leave();

	// unbind communication and node listener
	node.unbind( this );                               /*NodeListener*/
	node.unbind( this, PingPong::PINGPONG_SERVICEID ); /*CommunicationListener*/

	// now we are completely shut down
	logging_info( "pingpong service shut down" );
}

// timer event
void PingPong::eventFunction()
{
	// We ping all nodes that are known in the overlay structure
	// this can be all nodes (OneHop) overlay or just some neighbors
	// in case of a Chord or Kademlia structure
	// NOTE: Currently ariba only supports the Chord overlay.

	// In this sample we use auto-links: we just send out our message
	// to the node and the link is established automatically. for more
	// control we would use the node->establishLink function to create
	// a link and start using the link in the CommunicationListener::onLinkUp
	// function that is implemented further down in PingPong::onLinkUp
	
	// NOTE: This example still uses the old deprecated ariba::message messages 
	//   with the ariba built-in serialization. 
	// For future applications please use the new reboost::message_t messages. 
	//   Data is stored in high efficient zero-copy buffers of type 
	//   reboost::shared_buffer_t. These buffers hold plain data, so you have to 
	//   serialize the data "on your own".
	// We recommend third-party serialization libraries like:
	//   - Protocol Buffers (http://en.wikipedia.org/wiki/Protocol_Buffers)
	//   - MessagePack      (http://en.wikipedia.org/wiki/MessagePack)

	
	// don't do anything if we have no neighbors
	if ( node.getNeighborNodes().size() == 0)
    {
        logging_info( "[PINGPONG]\t +++ no neighbors +++" );
        return;
    }
    
    
	pingId++;
    logging_info( "\n|||||||||| >>>>>>>>>>\n"
	        << "[PINGPONG]\t PINGING overlay neighbors with ping id " << pingId );
	PingPongMessage pingmsg( pingId, name );
	
	//-----------------------------------------------------------------------
	// Option 1: get all neighboring nodes and send the message to each
	//-----------------------------------------------------------------------
	counter++;
	if (counter<0 || counter>4) {
		counter = 0;
		string s;
		for (int i=0; i<names.size();i++) {
			if (i!=0) s+= ", ";
			s = s+names[i];
		}
		logging_info("[PINGPONG]\t ----> I am " << name << " and I know " << s);
		names.clear();
	}

	vector<NodeID> nodes = node.getNeighborNodes();
	BOOST_FOREACH( NodeID nid, nodes ){
		logging_info( "[PINGPONG]\t sending ping message to " << nid.toString() );
		node.sendMessage( pingmsg, nid, PingPong::PINGPONG_SERVICEID );
	}

	//-----------------------------------------------------------------------
	// Option 2: send a "broadcast message" that actually does the same thing
	//           internally, gets all neighboring nodes and sends the message
	//-----------------------------------------------------------------------
	// node->sendBroadcastMessage( pingmsg, PingPong::PINGPONG_SERVICEID );
}

void PingPong::onJoinCompleted( const SpoVNetID& vid ) {
	logging_info( "pingpong node join completed, spovnetid=" << vid.toString() );

	// start the timer to ping every second
	Timer::start();
}

void PingPong::onJoinFailed( const SpoVNetID& vid ) {
	logging_error("pingpong node join failed, spovnetid=" << vid.toString() );
}

void PingPong::onLeaveCompleted( const SpoVNetID& vid ){
	logging_info("pingpong node leave completed, spovnetid=" << vid.toString() );
}

void PingPong::onLeaveFailed( const SpoVNetID& vid ){
	logging_error("pingpong node leave failed, spovnetid=" << vid.toString() );
}

void PingPong::onMessage(const DataMessage& msg, const NodeID& remote, const LinkID& lnk) {
	PingPongMessage* pingmsg = msg.getMessage()->convert<PingPongMessage> ();
	bool found=false;
	for (int i=0;i<names.size(); i++) if (names[i]==pingmsg->getName()) found=true;
	if (!found) names.push_back(pingmsg->getName());
	logging_info( "\n<<<<<<<<<< ||||||||||\n"
	        << "[PINGPONG]\t RECEIVED ping message on link "
	        << lnk.toString()
	        << " " << (node.isLinkDirect(lnk) ? "[DIRECT-LINK]" : "[INDIRECT-LINK]")
	        << " HopCount: " << node.getHopCount(lnk)
			<< " from node " << remote.toString()
			<< " (" << pingmsg->getName() << ")"
			<< ": " << pingmsg->info() );
	delete pingmsg;
}

void PingPong::onLinkUp(const LinkID& lnk, const NodeID& remote){
	logging_info( "received link-up event for link " << lnk.toString()
			<< " and node " << remote.toString() );
}

void PingPong::onLinkDown(const LinkID& lnk, const NodeID& remote){
	logging_info( "received link-down event for link " << lnk.toString()
			<< " and node " << remote.toString() );
}

void PingPong::onLinkChanged(const LinkID& lnk, const NodeID& remote){
	logging_info( "link-changed event for link " << lnk.toString()
			<< " and node " << remote.toString() );
}

bool PingPong::onLinkRequest(const NodeID& remote) {
	logging_info( "node " << remote.toString() << " wants to build up a link with us ... allowing" );
	return true;
}

void PingPong::onLinkFail(const LinkID& lnk, const NodeID& remote){
	logging_info( "received link-failed event for link " << lnk.toString()
			<< " and node " << remote.toString() );
}

}}} // namespace ariba, application, pingpong