#include "math.h"

int ledPin1 = D2;
int ledPin2 = D1;
int ledPin3 = D0;
bool isEmitting;
int brightness1 = 0;    
int fadeAmount1 = 5;
int brightness2 = 85;   
int fadeAmount2 = 5;
int brightness3 = 170;  
int fadeAmount3 = 5;
int myValue;
int fan = A0;

void setup ()
{
    isEmitting = false;
    pinMode(fan, OUTPUT);
    pinMode(ledPin1,  OUTPUT);
    pinMode(ledPin2,  OUTPUT);
    pinMode(ledPin3,  OUTPUT);
    digitalWrite(fan,LOW);

    Particle.function("led",ledToggle);
}

void loop ()
{
  if(isEmitting){
    SendScent();
  }else{
    StopSendingScent();
  }
}
void SendScent(){
    myValue = random(255);
    // digitalWrite(ledPin2,HIGH);
    analogWrite(ledPin1, brightness1);
    analogWrite(ledPin2, brightness2);
    analogWrite(ledPin3, brightness3);
    digitalWrite(fan, HIGH);
    brightness1 = brightness1 + fadeAmount1;
    brightness2 = brightness2 + fadeAmount2;
    brightness3 = brightness3 + fadeAmount3;
    if (brightness1 <= -50 || brightness1 >= 255) {
       fadeAmount1 = -fadeAmount1;
    }
    if (brightness2 <= -50|| brightness2 >= 255) {
       fadeAmount2 = -fadeAmount2;
    }
    if (brightness3 <= -50 || brightness3 >= 255) {
       fadeAmount3 = -fadeAmount3;
    }
    delay(15);
}
void StopSendingScent(){

    analogWrite(ledPin1, 0);
    analogWrite(ledPin2, 0);
    analogWrite(ledPin3, 0);
    digitalWrite(fan, LOW);

}
int ledToggle(String command) {
  
    if (command=="on") {

        isEmitting = true;
        return 1;
    }
    else if (command=="off") {

        isEmitting = false;
        return 0;
    }
    else {
        return -1;
    }
}