//UNO PWM pins are 3, 5, 6, 9, 10, 11
//MEGA PWM pins are 2 - 13, 44 - 46

const int redpin = 6;
const int greenpin = 5;
const int bluepin = 3;




void setup() {
  pinMode(redpin, OUTPUT);
  pinMode(greenpin, OUTPUT);
  pinMode(bluepin, OUTPUT);

  pinMode(A1, INPUT);
  pinMode(12, OUTPUT);
  Serial.begin(9600);
}


void loop() {
  int photoresist = analogRead(A1);
  //10000 lux and above= reading of 39 and lower
  //1000 lux and above = reading of 169 to 39
  //100 lux and lower = reading of 511 to 1015

  //from wokwi docs -- "conditions" (can change these later)
  //full daylight = 10000 lux ("good conditions")
  //overcast day = 1000 lux ("medium conditions")
  //stairway lighting = 100 lux  (calling this "poor conditions")

  Serial.println(photoresist);

  if (photoresist < 169){  //perf - fully green
   setColor(0,255,0);
  }
  else if (photoresist > 511){  // poor - fully red
   setColor(255,0,0);
  } 
  else{                   // med - yellow
    setColor(255,255,0);
  }

}

//analogWrite can be 0 to 225 (0=low, 225 = high)
//a function to set the analog value of the PWM pins so we get a diff color
void setColor(int redval, int greenval, int blueval){
  analogWrite(redpin, redval);
  analogWrite(greenpin, greenval);
  analogWrite(bluepin, blueval);
}