#pragma once

#include <RCSwitch.h>

class ContactSensor {
	short id;
	short senderPin;
	RCSwitch mySwitch = RCSwitch();

public:
	ContactSensor(short id, short senderPin) {
		this->id = id;
		this->senderPin = senderPin;
	}

	void setup() {
		mySwitch.enableTransmit(senderPin);
		mySwitch.setProtocol(2);
	}

	void sendStateAndVoltage(bool state) {
		unsigned long value = 0x70000000;
		value |= readVcc() << 6;
		value |= !state << 5;
		value |= id;
		mySwitch.send(value, 32);
	}

	long readVcc() {
		// Read 1.1V reference against AVcc
		// set the reference to Vcc and the measurement to the internal 1.1V reference
#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
		ADMUX = _BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
#elif defined (__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
		ADMUX = _BV(MUX5) | _BV(MUX0);
#elif defined (__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
		ADMUX = _BV(MUX3) | _BV(MUX2);
#else
		ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
#endif

		delay(2); // Wait for Vref to settle
		ADCSRA |= _BV(ADSC); // Start conversion
		while (bit_is_set(ADCSRA, ADSC))
			; // measuring

		uint8_t low = ADCL; // must read ADCL first - it then locks ADCH
		uint8_t high = ADCH; // unlocks both

		long result = (high << 8) | low;

		result = 1125300L / result; // Calculate Vcc (in mV); 1125300 = 1.1*1023*1000
		return result; // Vcc in millivolts
	}
};