#define ldrPin 35

#define PIN_TRIG 25
#define PIN_ECHO 32

#define buttomPin 5

bool buttomState = 0;
bool buttomLastState = 0;
bool sytemState = false;

#define ledPin 19

#define relayPin 17

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(ldrPin, INPUT);

  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);

  pinMode(buttomPin, INPUT_PULLDOWN);

  buttomState = digitalRead(buttomPin);

  pinMode(ledPin, OUTPUT);

  pinMode(relayPin, OUTPUT);

}

void loop() {
  buttomLastState = buttomState;
  buttomState = digitalRead(buttomPin);
  // put your main code here, to run repeatedly:
  // Essas constantes devem corresponder aos atributos "gama" e "rl10" do fotoresistor
  const float GAMMA = 0.7;
  const float RL10 = 50;

  if(buttomState == 0 && buttomLastState == 1){
    sytemState = !sytemState;
  }

  Serial.println(buttomState);

  // Converte o valor analógico em valor lux:
  int analogValue = analogRead(ldrPin);
  // Serial.println("Analog Value: " + String(analogValue));
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  // Serial.println("Lux Value: " + String(lux));


  // Inicia uma nova medição:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Leia o resultado:
  int duration = pulseIn(PIN_ECHO, HIGH);
  float distance = duration / 58;
  // Serial.print("Distância em CM: ");
  // Serial.println(distance);
  // Serial.print("Distância em polegadas: ");
  // Serial.println(duration / 148);

  if(sytemState){
    Serial.println("Sistema Ligado");

    Serial.print("Distância em CM: ");
    Serial.println(distance);


    Serial.println("Lux Value: " + String(lux));

    if(distance < 80 && lux < 90){
      digitalWrite(ledPin, HIGH);
      digitalWrite(relayPin, LOW);

    }else{
      digitalWrite(ledPin, LOW);
      digitalWrite(relayPin, HIGH);

    }



  } else{
    Serial.println("Sistema Desligado");
    digitalWrite(relayPin, LOW);
    digitalWrite(ledPin, LOW);

  }

  delay(10); // this speeds up the simulation
}