/*
	Portions of this code written by Gregory Fenton
	http://labby.co.uk/2012/08/arduino-visual-icmp-ping-server-monitor-icmp-echo-request/
*/

#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h> // UDP library from: bjoern@cs.stanford.edu 12/30/2008
#include <ICMPPing.h>

byte mac[] = {0xDE, 0xAD, 0xBE, 0xDD, 0xFE, 0xED}; // mac address for ethernet shield
byte ip[] = {192,168,0,177}; // ip address for ethernet shield
byte pingAddr[] = {192,168,0,10}; // ip address to ping

bool pingStatus = false;

SOCKET pingSocket = 0;

char buffer [256];

int delayMS = 5 * 1000; // delay between successive pings (60 * 1000 = 60 seconds)

#define serialOut 1
#define ledOut 1

#ifdef ledOut
	#define ledPing 2
	#define ledOk 3
	#define ledFail 4
#endif

//udp stuff
unsigned int localPort = 8888;			// local port to listen on

// buffers for receiving and sending data
// greg: unused in this code?
//char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
//char ReplyBuffer[] = "acknowledged";			 // a string to send back

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
//end udp stuff

// greg: unused in this code?
// int val=0;

bool connected = false;

void setup()
{
	#ifdef serialOut
		// start serial port:
		Serial.begin(9600);
		Serial.println("Starting ethernet connection");
	#endif
	//start Ethernet
	// if (Ethernet.begin(mac) == 0) {
	#ifdef serialOut
		// Serial.println("Failed to configure Ethernet using DHCP");
	#endif
	// DHCP failed, so use a fixed IP address:
	Ethernet.begin(mac, ip);
	// start udp connection
	Udp.begin(localPort);
	// }
}

#ifdef serialOut
	void startPing()
	{
		Serial.println("Ping begin");
	}

	void endPing()
	{
		Serial.println("Ping fin");
	}
#endif

#ifdef ledOut
	void pingSuccess()
	{
		#ifdef serialOut
			Serial.println("Ping great success");
		#endif
		if(pingStatus == false) // we don't need to constantly turn the light on
		{
			#ifdef serialOut
				Serial.println("Living Room - Sofa light ON");
			#endif
			Udp.beginPacket("192.168.0.7", 9760);
			Udp.write("678,!R2D1F1|");
			Udp.endPacket();
			// greg: unused in this code?
			// val = random(300);
			pingStatus = true;
		}
	}

	void pingFail()
	{
		#ifdef serialOut
			Serial.println("Ping fail");
		#endif
		if(pingStatus == true) // we don't need to constantly turn the light off
		{
			#ifdef serialOut
				Serial.println("Living Room - Sofa light OFF");
			#endif
			Udp.beginPacket("192.168.0.7", 9760);
			Udp.write("678,!R2D1F0|");
			Udp.endPacket();
			// greg: unused in this code?
			// val = random(300);
			pingStatus = false;
		}
	}
#endif

void loop()
{
	bool pingRet; // pingRet stores the ping() success (true/false)

	#ifdef ledOut
		startPing();
	#endif
	ICMPPing ping(pingSocket);
	pingRet = ping(4, pingAddr, buffer);
	#ifdef ledOut
		delay(250);
		endPing();
	#endif

	#ifdef seriallOut
		Serial.println(buffer);
	#endif
	#ifdef ledOut
		if(pingRet) // Failure
			pingSuccess();
		else
			pingFail();
	#endif
	delay(delayMS);
}