// --- LDRs (Entradas Analógicas) ---
#define P1_ENT 34
#define P1_SAI 35
#define P2_ENT 32
#define P2_SAI 33

// --- LEDs das portas (sempre acesos) ---
#define LED_P1_ENT 25
#define LED_P1_SAI 26
#define LED_P2_ENT 27
#define LED_P2_SAI 14

// --- LEDs de status ---
#define LED_VERM 13     // Sistema funcionando
#define LED_VERDE 12    // Entrada completa
#define LED_AMARELO 15  // Saída completa

// --- Configurações ---
int contador = 0;
int threshold = 100; // valor para detectar interrupção do LDR
unsigned long debounceTime = 150;

// --- Controle de tempo ---
unsigned long lastRedBlink = 0;
unsigned long redInterval = 500;

unsigned long lastVerdeBlink = 0;
unsigned long verdeDuration = 200;

unsigned long lastAmareloBlink = 0;
unsigned long amareloDuration = 200;

// Variáveis de debounce
unsigned long lastTriggerP1 = 0;
unsigned long lastTriggerP2 = 0;

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

  // LEDs das portas sempre acesos
  pinMode(LED_P1_ENT, OUTPUT); digitalWrite(LED_P1_ENT, HIGH);
  pinMode(LED_P1_SAI, OUTPUT); digitalWrite(LED_P1_SAI, HIGH);
  pinMode(LED_P2_ENT, OUTPUT); digitalWrite(LED_P2_ENT, HIGH);
  pinMode(LED_P2_SAI, OUTPUT); digitalWrite(LED_P2_SAI, HIGH);

  // LEDs de status
  pinMode(LED_VERM, OUTPUT); digitalWrite(LED_VERM, LOW);
  pinMode(LED_VERDE, OUTPUT); digitalWrite(LED_VERDE, LOW);
  pinMode(LED_AMARELO, OUTPUT); digitalWrite(LED_AMARELO, LOW);
}

void loop() {
  unsigned long now = millis();

  // --- LED vermelho pisca continuamente ---
  if(now - lastRedBlink >= redInterval) {
    digitalWrite(LED_VERM, !digitalRead(LED_VERM));
    lastRedBlink = now;
  }

  // --- Leitura sensores ---
  int valP1Ent = analogRead(P1_ENT);
  int valP1Sai = analogRead(P1_SAI);
  int valP2Ent = analogRead(P2_ENT);
  int valP2Sai = analogRead(P2_SAI);

  // --- Porta 1 ---
  if(now - lastTriggerP1 > debounceTime) {
    // Detecta entrada completa Porta 1
    if(valP1Ent < threshold && valP1Sai >= threshold) {
      contador++;
      lastVerdeBlink = now;
      digitalWrite(LED_VERDE, HIGH);
    }
    // Detecta saída completa Porta 1
    if(valP1Sai < threshold && valP1Ent >= threshold) {
      contador--;
      lastAmareloBlink = now;
      digitalWrite(LED_AMARELO, HIGH);
    }
    lastTriggerP1 = now;
  }

  // --- Porta 2 (corrigida) ---
  if(now - lastTriggerP2 > debounceTime) {
    // Detecta entrada completa Porta 2
    if(valP2Sai < threshold && valP2Ent >= threshold) {  // invertido para corrigir
      contador++;
      lastVerdeBlink = now;
      digitalWrite(LED_VERDE, HIGH);
    }
    // Detecta saída completa Porta 2
    if(valP2Ent < threshold && valP2Sai >= threshold) {  // invertido para corrigir
      contador--;
      lastAmareloBlink = now;
      digitalWrite(LED_AMARELO, HIGH);
    }
    lastTriggerP2 = now;
  }

  // --- Apaga LEDs de status após duração ---
  if(digitalRead(LED_VERDE) == HIGH && now - lastVerdeBlink >= verdeDuration) {
    digitalWrite(LED_VERDE, LOW);
  }
  if(digitalRead(LED_AMARELO) == HIGH && now - lastAmareloBlink >= amareloDuration) {
    digitalWrite(LED_AMARELO, LOW);
  }

  // --- Exibe contador ---
  Serial.print("Contador atual: ");
  Serial.println(contador);
}