/*
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2018 Sensnology AB
 * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * 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.
 */

#include "MyConfig.h"
#include "MyProtocol.h"
#include "MyGatewayTransport.h"
#include "MyMessage.h"
#include "MyProtocol.h"

// global variables
extern MyMessage _msgTmp;

char _serialInputString[MY_GATEWAY_MAX_RECEIVE_LENGTH];    // A buffer for incoming commands from serial interface
uint8_t _serialInputPos;
MyMessage _serialMsg;

bool gatewayTransportSend(MyMessage &message)
{
	setIndication(INDICATION_GW_TX);
	MY_SERIALDEVICE.print(protocolFormat(message));
	// Serial print is always successful
	return true;
}

bool gatewayTransportInit(void)
{
	(void)gatewayTransportSend(buildGw(_msgTmp, I_GATEWAY_READY).set(MSG_GW_STARTUP_COMPLETE));
	// Send presentation of locally attached sensors (and node if applicable)
	presentNode();
	return true;
}

bool gatewayTransportAvailable(void)
{
	while (MY_SERIALDEVICE.available()) {
		// get the new byte:
		const char inChar = (char)MY_SERIALDEVICE.read();
		// if the incoming character is a newline, set a flag
		// so the main loop can do something about it:
		if (_serialInputPos < MY_GATEWAY_MAX_RECEIVE_LENGTH - 1) {
			if (inChar == '\n') {
				_serialInputString[_serialInputPos] = 0;
				const bool ok = protocolParse(_serialMsg, _serialInputString);
				if (ok) {
					setIndication(INDICATION_GW_RX);
				}
				_serialInputPos = 0;
				return ok;
			} else {
				// add it to the inputString:
				_serialInputString[_serialInputPos] = inChar;
				_serialInputPos++;
			}
		} else {
			// Incoming message too long. Throw away
			_serialInputPos = 0;
		}
	}
	return false;
}

MyMessage & gatewayTransportReceive(void)
{
	// Return the last parsed message
	return _serialMsg;
}