#include <FastLED.h>
#include <PubSubClient.h>

#define NUM_LEDS_EYES 2
#define NUM_LEDS_LIGHT 1
#define DATA_PIN_EYES 4 
#define DATA_PIN_LIGHT 2
#define BTN_PIN 5

CRGB eyes[NUM_LEDS_EYES];
CRGB light[NUM_LEDS_LIGHT];

// previous time for the tasks depending upon time.
unsigned long prevTime_T1 = millis(); 

long interval_T1 = 1000; 

enum EyeSide {
  RIGHT,
  LEFT,
};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(BTN_PIN, INPUT_PULLUP);

  FastLED.addLeds<NEOPIXEL, DATA_PIN_EYES>(eyes, NUM_LEDS_EYES);
  FastLED.addLeds<NEOPIXEL, DATA_PIN_LIGHT>(light, NUM_LEDS_LIGHT);

  // Eyes open
  eyes[0] = CHSV(145, 255, 255);
  eyes[1] = CHSV(145, 255, 255);
}

void EyesBlink()
{  
  // Close eyes
  eyes[0] = CHSV(145, 255, 0);
  eyes[1] = CHSV(145, 255, 0);
  FastLED.show();

  // Open eyes
  for (int i = 0; i < 255; i+=5)
  {
    eyes[0] = CHSV(145, 255, i);
    eyes[1] = CHSV(145, 255, i);
    FastLED.show();
  }

  interval_T1 = random(800, 8000); // generate a new random interval after each blink
}


void MouthAction()
{
  if (digitalRead(BTN_PIN) == LOW)
  {
    light[0] = CRGB::SkyBlue;
  }
  else
  {
    light[0] = CRGB::Red; 
  }
  FastLED.show();
}


void loop() 
{

  unsigned long currentTime = millis();

  // Task 1 : Blink LED1 (T1)
  if (currentTime - prevTime_T1 > interval_T1) 
  {
    EyesBlink();
    prevTime_T1 = currentTime;
    //Serial.println(interval_T1);
  }
  
  MouthAction();

  delay(10);

}