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

#define LED1_PIN 7
#define LED2_PIN 8
#define BUTTON_MODE 2
#define BUTTON_LED1 3
#define BUTTON_LED2 4
#define BUTTON_AUTO 5
#define LED_DELAY 500
#define AUTO_DELAY 4000

LiquidCrystal_I2C lcd(0x27, 20, 4);

unsigned long last_led1_change_time = 0;
unsigned long last_led2_change_time = 0;
unsigned long last_auto_change_time = 0;
int current_mode = 0;
bool led1_status = false;
bool led2_status = false;
bool auto_mode_active = false;
bool auto_led1_status = false;
bool auto_led2_status = false;

void setup() {
  Serial.begin(9600);
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  pinMode(BUTTON_MODE, INPUT_PULLUP);
  pinMode(BUTTON_LED1, INPUT_PULLUP);
  pinMode(BUTTON_LED2, INPUT_PULLUP);
  pinMode(BUTTON_AUTO, INPUT_PULLUP);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("   Selamat Datang  ");
  lcd.setCursor(0, 1);
  lcd.print("  di Program Arduino");
  lcd.setCursor(0, 2);
  lcd.print("     LED Control    ");
  lcd.setCursor(0, 3);
  lcd.print("     Mode Manual    ");
}

void loop() {
  if (digitalRead(BUTTON_MODE) == LOW) {
    delay(250);
    if (current_mode == 0) {
      current_mode = 1;
      lcd.setCursor(0, 3);
      lcd.print("    Mode Otomatis   ");
      last_auto_change_time = millis();
    } else {
      current_mode = 0;
      lcd.setCursor(0, 3);
      lcd.print("     Mode Manual    ");
      digitalWrite(LED1_PIN, LOW);
      digitalWrite(LED2_PIN, LOW);
      led1_status = false;
      led2_status = false;
      auto_led1_status = false;
      auto_led2_status = false;
    }
  }

  if (current_mode == 0) {
    if (digitalRead(BUTTON_LED1) == LOW) {
      delay(250);
      led1_status = !led1_status;
      digitalWrite(LED1_PIN, led1_status);
      if (led1_status) {
        lcd.setCursor(0, 3);
        lcd.print(" LED1 ON   ");
      } else {
        lcd.setCursor(0, 3);
        lcd.print(" LED1 OFF  ");
      }
    }



    if (digitalRead(BUTTON_LED2) == LOW) {
      delay(250);
      led2_status = !led2_status;
      digitalWrite(LED2_PIN, led2_status);
      if (led2_status) {
        lcd.setCursor(11, 3);
        lcd.print(" LED2 ON   ");
      } else {
        lcd.setCursor(11, 3);
        lcd.print(" LED2 OFF  ");
      }
    }

    if (led1_status && millis() - last_led1_change_time >= AUTO_DELAY) {
      last_led1_change_time = millis();
      if (auto_led1_status) {
        auto_led1_status = false;
        digitalWrite(LED1_PIN, LOW);
      } else {
        auto_led1_status = true;
        digitalWrite(LED1_PIN, HIGH);
      }
    }

    if (led2_status && millis() - last_led2_change_time >= AUTO_DELAY) {
      last_led2_change_time = millis();
      if (auto_led2_status) {
        auto_led2_status = false;
        digitalWrite(LED2_PIN, LOW);
      } else {
        auto_led2_status = true;
        digitalWrite(LED2_PIN, HIGH);
      }
    }
  }

  if (current_mode == 1) {
    if (digitalRead(BUTTON_AUTO) == LOW) {
      delay(250);
      auto_mode_active = !auto_mode_active;
      if (auto_mode_active) {
        lcd.setCursor(0, 3);
        lcd.print(" Auto Mode Active ");
      } else {
        lcd.setCursor(0, 3);
        lcd.print(" Auto Mode Inactive ");
        digitalWrite(LED1_PIN, LOW);
        digitalWrite(LED2_PIN, LOW);
        auto_led1_status = true;
        auto_led2_status = true;
      }
      last_auto_change_time = millis();
    }

    if (auto_mode_active && millis() - last_auto_change_time >= AUTO_DELAY) {
      last_auto_change_time = millis();
      auto_led1_status = !auto_led1_status;
      auto_led2_status = !auto_led2_status;
      digitalWrite(LED1_PIN, auto_led1_status);
      digitalWrite(LED2_PIN, auto_led2_status);
    }
  }
}