/*
* Copyright (C) 2013 Henrik Ekblad <henrik.ekblad@gmail.com>
*
* Contribution by a-lurker
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* DESCRIPTION
* The EthernetGateway sends data received from sensors to the ethernet link.
* The gateway also accepts input on ethernet interface, which is then sent out to the radio network.
*
* The GW code is designed for Arduino 328p / 16MHz.  ATmega168 does not have enough memory to run this program.
*
* COMPILING
* You must make sure to disable DEBUG in Sensor.h before compiling this sketch. Othervise the sketch won't fit in program space when downloading.
* For UIPEthernet(ENC28J60) usage: Note that I had to disable UDP and DHCP support in uipethernet-conf.h to reduce space. (which meas you ave to choose a static IP)
* For WizNET usage: Do *not* install the provided UIPEthernet-library. Remove UIPEthernet-include below and uncomment the Ethernet.h.
*
* VERA CONFIGURATION:
* Enter "ip-number:port" in the ip-field of the Arduino GW device. This will temporarily override any serial configuration for the Vera plugin.
* E.g. If you want to use the defualt values in this sketch enter: 192.168.178.66:5003
*
* LED purposes:
* - RX (green) - blink fast on radio message recieved. In inclusion mode will blink fast only on presentation recieved
* - TX (yellow) - blink fast on radio message transmitted. In inclusion mode will blink slowly
* - ERR (red) - fast blink on error during transmission error or recieve crc error
*
*  ----------- Connection guide ---------------------------------------------------------------------------
*  13  Radio & Ethernet SPI SCK
*  12  Radio & Ethernet SPI MISO (SO)
*  11  Radio & Ethernet SPI MOSI (SI)
*  10  Ethernet SPI Slave Select (CS)    Pin 10, the SS pin, must be an o/p to put SPI in master mode
*  9   Radio TX LED using on board LED   (optional)  +5V -> LED -> 270-330 Ohm resistor -> pin 9.
*  8   Radio RX LED                      (optional)  +5V -> LED -> 270-330 Ohm resistor -> pin 8.
*  7   Radio error LED                   (optional)  +5V -> LED -> 270-330 Ohm resistor -> pin 7.
*  6   Radio SPI Slave Select
*  5   Radio Chip Enable
*  3   Inclusion mode button             (optional), 10K pull down to GND, button to VCC)
*  2   Radio IRQ pin                     (optional), W5100 Int, if linked to pin 2)
* -----------------------------------------------------------------------------------------------------------
* Powering: both NRF24l01 radio and Ethernet(ENC28J60) uses 3.3V
*/




#include <SPI.h>  
#include <EEPROM.h>  
//#include <RF24.h>
#include <MsTimer2.h>
#include <PinChangeInt.h>
#include <MyGateway.h>  
#include <stdarg.h>

//#include <UIPEthernet.h>  // Use this if you have attached a Ethernet ENC28J60 shields  
#include <Ethernet.h>   // Use this fo WizNET module and Arduino Ethernet Shield 


#define INCLUSION_MODE_TIME 1 // Number of minutes inclusion mode is enabled
#define INCLUSION_MODE_PIN  3 // Digital pin used for inclusion mode button

#define RADIO_CE_PIN        5  // radio chip enable
#define RADIO_SPI_SS_PIN    6  // radio SPI serial select
#define RADIO_ERROR_LED_PIN 7  // Error led pin
#define RADIO_RX_LED_PIN    8  // Receive led pin
#define RADIO_TX_LED_PIN    9  // the PCB, on board LED

#define IP_PORT 5003        // The port you want to open 
IPAddress myIp(192, 168, 1, 13);  // Configure your static ip-address here

// The MAC address can be anything you want but should be unique on your network.
// Newer boards have a MAC address printed on the underside of the PCB, which you can (optionally) use.
// Note that most of the Ardunio examples use  "DEAD BEEF FEED" for the MAC address.
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  // DEAD BEEF FEED

// a R/W server on the port
EthernetServer server = EthernetServer(IP_PORT);

// No blink or button functionality. Use the vanilla constructor.
//MyGateway gw(RADIO_CE_PIN, RADIO_SPI_SS_PIN, INCLUSION_MODE_TIME);

// Uncomment this constructor if you have leds and include button attached to your gateway 
MyGateway gw(RADIO_CE_PIN, RADIO_SPI_SS_PIN, INCLUSION_MODE_TIME, INCLUSION_MODE_PIN, RADIO_RX_LED_PIN, RADIO_TX_LED_PIN, RADIO_ERROR_LED_PIN);


char inputString[MAX_RECEIVE_LENGTH] = "";    // A string to hold incoming commands from serial/ethernet interface
int inputPos = 0;

void setup()
{
	// Initialize gateway at maximum PA level, channel 70 and callback for write operations 
	gw.begin(RF24_PA_LEVEL_GW, RF24_CHANNEL, RF24_DATARATE, writeEthernet);

	Ethernet.begin(mac, myIp);

	// give the Ethernet interface a second to initialize
	delay(1000);

	// start listening for clients
	server.begin();

	// C++ classes and interrupts really sucks. Need to attach interrupt 
	// outside thw Gateway class due to language shortcomings! Gah! 

	if (gw.isLedMode()) {
		// Add led timer interrupt
		MsTimer2::set(300, ledTimersInterrupt);
		MsTimer2::start();
		// Add interrupt for inclustion button to pin 
		PCintPort::attachInterrupt(INCLUSION_MODE_PIN, startInclusionInterrupt, RISING);
	}
}

// This will be called when data should be written to ethernet 
void writeEthernet(char *writeBuffer) {
	server.write(writeBuffer);
}


void processEthernetMessages()
{
	// if an incoming client connects, there will be
	// bytes available to read via the client object
	EthernetClient client = server.available();

	if (client)
	{
		// if got 1 or more bytes
		if (client.available())
		{
			// read the bytes incoming from the client
			char inChar = client.read();

			if (inputPos<MAX_RECEIVE_LENGTH - 1) {
				// if newline then command is complete
				if (inChar == '\n')
				{  // a command was issued by the client
					// we will now try to send it to the actuator
					inputString[inputPos] = 0;

					// echo the string to the serial port
					Serial.print(inputString);

					gw.parseAndSend(inputString);

					// clear the string:
					inputPos = 0;
				}
				else
				{  // add it to the inputString:
					inputString[inputPos] = inChar;
					inputPos++;
				}
			}
			else {
				// Incoming message too long. Throw away 
				inputPos = 0;
			}
		}
	}
}



void loop()
{
	// check for incoming commands from clients
	processEthernetMessages();

	gw.processRadioMessage();
}

void startInclusionInterrupt() {
	gw.startInclusionInterrupt();
}

void ledTimersInterrupt() {
	gw.ledTimersInterrupt();
}