int LED_PIN[] = {25, 26, 27};
#define BTN 14
#define POT 12

int btn_value = 0;
int btn_count = 0;
int pot_value = 0;

int r_value[] = {255, 0, 0};
int g_value[] = {0, 255, 0};
int b_value[] = {0, 0, 255};

int PWM_CHANEL[] = {0, 1, 2};
int PWM_FREQUENCY = 1000;
int PWM_RESOLUTION = 8;

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

  Serial.println("Hello CPE345!!!");

  pinMode(BTN, INPUT);
  pinMode(POT, INPUT);
  for(int i = 0; i < 3; i++){
    pinMode(LED_PIN[i], OUTPUT);
  }

  for(int i = 0; i < 3; i++){
    ledcSetup(PWM_CHANEL[i], PWM_FREQUENCY, PWM_RESOLUTION);
    ledcAttachPin(LED_PIN[i], PWM_CHANEL[i]);
  }
}

void loop() {

  btn_value = digitalRead(BTN); 
  pot_value = analogRead(POT);
  int map_value = map(pot_value, 0, 4095, 0, 255);

  if(btn_value != 1){

    btn_count++;
    if(btn_count > 3){
      btn_count = 1;
    }
    
    for(int i = 0; i < 3; i++){
      if(btn_count == 1){
        ledcWrite(PWM_CHANEL[i], r_value[i]);
      }
      if(btn_count == 2){
        ledcWrite(PWM_CHANEL[i], g_value[i]);
      }
      if(btn_count == 3){
        ledcWrite(PWM_CHANEL[i], b_value[i]);
      }
      delay(500);     
    }

  }else if(btn_count == 1){
    if(btn_value == 1){
      ledcWrite(PWM_CHANEL[0], map_value);
      Serial.print("--> It's RED!!");
      Serial.println("--> It's VALUE FROM ANALOG : " + String(pot_value));
      delay(100);
    }
  }else if(btn_count == 2){
    if(btn_value == 1){
      ledcWrite(PWM_CHANEL[1], map_value);
      Serial.print("--> It's GREEN!!");
      Serial.println("--> It's VALUE FROM ANALOG : " + String(pot_value));
      delay(100);
    }
  }else if(btn_count == 3){
    if(btn_value == 1){
      ledcWrite(PWM_CHANEL[2], map_value);
      Serial.print("--> It's BLUE!!");
      Serial.println("--> It's VALUE FROM ANALOG : " + String(pot_value));
      delay(100);
    }
  }
}