#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

// Definisi Pin Relay & LDR
#define LDR_PIN    PA0  // Terhubung ke DO / AO LDR
#define RELAY1_PIN PA5  // Lampu 1 (01.00 - 08.00)
#define RELAY2_PIN PA6  // Lampu 2 (09.00 - 16.00)
#define RELAY3_PIN PA7  // Lampu 3 (17.00 - 24.00)

int currentHour = 1;
int currentMinute = 0;

void setup() {
  pinMode(LDR_PIN, INPUT);
    pinMode(RELAY1_PIN, OUTPUT);
      pinMode(RELAY2_PIN, OUTPUT);
        pinMode(RELAY3_PIN, OUTPUT);
          
            digitalWrite(RELAY1_PIN, LOW);
              digitalWrite(RELAY2_PIN, LOW);
                digitalWrite(RELAY3_PIN, LOW);

                  Wire.setSDA(PA10);
                    Wire.setSCL(PA9);
                      Wire.begin();
                        
                          lcd.init();
                            lcd.backlight();
                              lcd.setCursor(0, 0);
                                lcd.print("System Control");
                                  lcd.setCursor(0, 1);
                                    lcd.print("STM32 Ready...");
                                      delay(1500);
                                        lcd.clear();
                                        }

                                        void loop() {
                                          // Membaca status LDR (0 = Gelap, 1 = Terang atau sebaliknya tergantung modul)
                                            int ldrState = digitalRead(LDR_PIN); 
                                              
                                                // Asumsi: LDR bernilai LOW (0) atau HIGH (1) saat gelap/terang
                                                  // Ubah '== LOW' jika di Wokwi slider gelap bernilai HIGH
                                                    bool isDark = (ldrState == LOW); 

                                                      bool l1_active = false;
                                                        bool l2_active = false;
                                                          bool l3_active = false;

                                                            // Syarat: Lampu menyala HANYA jika masuk Jam Jadwal DAN kondisi GELAP
                                                              if (isDark) {
                                                                  if (currentHour >= 1 && currentHour <= 8) {
                                                                        l1_active = true;
                                                                            } 
                                                                                else if (currentHour >= 9 && currentHour <= 16) {
                                                                                      l2_active = true;
                                                                                          } 
                                                                                              else if ((currentHour >= 17 && currentHour <= 23) || currentHour == 0) {
                                                                                                    l3_active = true;
                                                                                                        }
                                                                                                          }

                                                                                                            // Eksekusi Relay (Menyalakan Lampu)
                                                                                                              digitalWrite(RELAY1_PIN, l1_active ? HIGH : LOW);
                                                                                                                digitalWrite(RELAY2_PIN, l2_active ? HIGH : LOW);
                                                                                                                  digitalWrite(RELAY3_PIN, l3_active ? HIGH : LOW);

                                                                                                                    // Tampilkan di LCD
                                                                                                                      lcd.setCursor(0, 0);
                                                                                                                        char timeBuffer[16];
                                                                                                                          sprintf(timeBuffer, "Jam:%02d:%02d LDR:%d", currentHour, currentMinute, ldrState);
                                                                                                                            lcd.print(timeBuffer);

                                                                                                                              lcd.setCursor(0, 1);
                                                                                                                                if (l1_active)      lcd.print("L1:ON  L2:OFF L3:OFF");
                                                                                                                                  else if (l2_active) lcd.print("L1:OFF L2:ON  L3:OFF");
                                                                                                                                    else if (l3_active) lcd.print("L1:OFF L2:OFF L3:ON ");
                                                                                                                                      else                lcd.print("GELAP/TERANG: OFF ");

                                                                                                                                        // Simulasi Waktu
                                                                                                                                          delay(100);
                                                                                                                                            currentMinute += 10;
                                                                                                                                              if (currentMinute >= 60) {
                                                                                                                                                  currentMinute = 0;
                                                                                                                                                      currentHour++;
                                                                                                                                                          if (currentHour >= 24) currentHour = 0;
                                                                                                                                                            }
                                                                                                                                                            }