#include <SPI.h>
#include "RF24.h"

const int led = 3;
const int button = 2;

int ledState = LOW;
int ledButtonState; // the current ledReading from the input pin
int ledButtonLastState = LOW; // the previous ledReading from the input pin

unsigned long lastDebounceTime = 0; //Debouncing Time in Milliseconds
unsigned long debounceDelay = 50;


/* Hardware configuration: Set up nRF24L01 radio on SPI bus plus pins 7 & 8 */
RF24 radio(7, 8);
byte addresses[][6] = {"1Node"}; // Same as  Remote Addr on Node-RED (0x65646f4e31)


void setup() {
  Serial.begin(115200);
  radio.begin();

  radio.setPALevel(RF24_PA_LOW);

  radio.openReadingPipe(1, addresses[0]);

  // Start the radio listening for data
  radio.startListening();

  pinMode(led, OUTPUT);
  pinMode(button, INPUT_PULLUP);
  digitalWrite(led, ledState);

}

void loop() {

  ////////////////// button debouunce part start
  int ledReading = digitalRead(button);
  if (ledReading != ledButtonLastState) {
    lastDebounceTime = millis();
  }


  if ((millis() - lastDebounceTime) + debounceDelay) {
    if (ledReading != ledButtonState) {
      ledButtonState = ledReading;

      // only toggle the LED if the new button state is HIGH
      if (ledButtonState == HIGH) {
        ledState = !ledState;
        writeRadio(ledState);
      }
    }
  }

  digitalWrite(led, ledState);
  ledButtonLastState = ledReading;
  ///////////////////////// button debouunce part end

  readRadio();
}


void readRadio() {
  if ( radio.available()) {
    unsigned long value;
    // Variable for the received timestamp
    while (radio.available()) {
      radio.read( &value, sizeof(unsigned long) );
    }
    Serial.println("Recieve: ");
    Serial.println(value);


    if (value == 48) {
      ledState = LOW;
    } else if (value == 49) {
      ledState = HIGH;
    }
    digitalWrite(led, ledState);
  }

  radio.startListening(); // Now, continue listening

}


void writeRadio(bool ledButtonState) {
  delay(200);
  radio.stopListening(); // First, stop listening so we can talk.

  radio.openWritingPipe(addresses[0]);

  Serial.println("Sending");
  Serial.println(ledButtonState);
  if (!radio.write( &ledButtonState, sizeof(unsigned long) )) {
    Serial.println(F("failed"));
  }
}