#include <Arduino.h>

// --- Deklarasi Pin (Sesuai JSON terbaru) ---
const int BTN_PIN = 4;       // Tombol
const int LED_MERAH = 2;     // LED Merah
const int LED_BIRU = 5;      // LED Biru (Sebagai Output Analog/PWM)
const int LDR_PIN = 34;      // Sensor LDR

// --- Variabel Debounce ---
int statusLedMerah = LOW;         
int statusTombol;            
int statusTombolSebelumnya = HIGH; 
unsigned long waktuDebounceTerakhir = 0;   
const unsigned long jedaDebounce = 50; 

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

  pinMode(BTN_PIN, INPUT_PULLUP);
  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_BIRU, OUTPUT);
  pinMode(LDR_PIN, INPUT);
  
  digitalWrite(LED_MERAH, LOW);
  analogWrite(LED_BIRU, 0);
  
  Serial.println("Sistem Berjalan...");
}

void loop() {
  // 1. DEBOUNCE TOMBOL
  int bacaTombol = digitalRead(BTN_PIN);

  if (bacaTombol != statusTombolSebelumnya) {
    waktuDebounceTerakhir = millis();
  }

  if ((millis() - waktuDebounceTerakhir) > jedaDebounce) {
    if (bacaTombol != statusTombol) {
      statusTombol = bacaTombol;
      if (statusTombol == LOW) {
        statusLedMerah = !statusLedMerah; 
      }
    }
  }
  digitalWrite(LED_MERAH, statusLedMerah);
  statusTombolSebelumnya = bacaTombol;

  // 2. BACA SENSOR & KONTROL PWM
  int nilaiLDR = analogRead(LDR_PIN);
  int kecerahanPWM = map(nilaiLDR, 0, 4095, 0, 255);
  analogWrite(LED_BIRU, kecerahanPWM);

  // 3. DEBUGGING
  Serial.print("LED Merah: ");
  Serial.print(statusLedMerah == HIGH ? "NYALA" : "MATI ");
  Serial.print(" | Nilai LDR: ");
  Serial.print(nilaiLDR);
  Serial.print(" | PWM Biru: ");
  Serial.println(kecerahanPWM);

  delay(50); 
}