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

const int buttonPin1 = 2;
const int buttonPin2 = 3;
const int buttonPin3 = 4;
const int buttonPin4 = 5;
const int redLedPin = 6;
const int yellowLedPins[] = { 8, 9, 10, 11, 12 };

bool buttonPressed1 = false;
bool buttonPressed2 = false;
bool buttonPressed3 = false;
bool buttonPressed4 = false;

LiquidCrystal_I2C lcd(0x27, 16, 2);

const char* kota[] = { "Depok", "Klaten", "Bantul", "Sleman", "Solo" };
int indexkota = 0;
unsigned long previousMillis = 0;
const long interval = 2000;

const char* tulisan = "Terimakasih telah menggunakan layanan kami";
int indextulisan = 0;
bool runningText = false;
unsigned long previousMillisMessage = 0;
const long intervalMessage = 300;

void setup() {
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3, INPUT_PULLUP);
  pinMode(buttonPin4, INPUT_PULLUP);
  pinMode(redLedPin, OUTPUT);
  for (int i = 0; i < 5; i++) {
    pinMode(yellowLedPins[i], OUTPUT);
  }
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Kota Berikutnya:");
  lcd.setCursor(0, 1);
  lcd.print(kota[indexkota]);
}

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

  if (digitalRead(buttonPin1) == LOW && !buttonPressed1) {
    Serial.println("Button 1 ditekan.");
    buttonPressed1 = true;
    runningText = true;
    indextulisan = 0;
  }

  if (runningText) {
    if (currentMillis - previousMillisMessage >= intervalMessage) {
      previousMillisMessage = currentMillis;
      lcd.clear();
      lcd.setCursor(0, 0);
      for (int i = 0; i < 16; i++) {
        if (indextulisan + i < strlen(tulisan)) {
          lcd.print(tulisan[indextulisan + i]);
        }
      }
      indextulisan++;
      if (indextulisan >= strlen(tulisan)) {
        indextulisan = 0;
        runningText = false;
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Kota Berikutnya:");
        lcd.setCursor(0, 1);
        lcd.print(kota[indexkota]);
      }
    }
  } else {
    if (currentMillis - previousMillis >= interval) {
      previousMillis = currentMillis;
      indexkota = (indexkota + 1) % 5;
      lcd.setCursor(0, 0);
      lcd.print("Kota Berikutnya:");
      lcd.setCursor(0, 1);
      lcd.print("                ");
      lcd.setCursor(0, 1);
      lcd.print(kota[indexkota]);
    }
  }

  if (digitalRead(buttonPin2) == LOW && !buttonPressed2) {
    Serial.println("Button 2 ditekan.");
    buttonPressed2 = true;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("STOP");
    lcd.setCursor(0, 1);
    lcd.print("                ");
    for (int i = 0; i < 5; i++) {
      digitalWrite(redLedPin, HIGH);
      delay(500);
      digitalWrite(redLedPin, LOW);
      delay(500);
    }
  }

  if (digitalRead(buttonPin3) == LOW && !buttonPressed3) {
    Serial.println("Button 3 ditekan.");
    buttonPressed3 = true;
    for (int j = 0; j < 5; j++) {
      for (int i = 4; i >= 0; i--) {
        digitalWrite(yellowLedPins[i], HIGH);
        delay(200);
        digitalWrite(yellowLedPins[i], LOW);
      }
    }
  }

  if (digitalRead(buttonPin4) == LOW && !buttonPressed4) {
    Serial.println("Button 4 ditekan.");
    buttonPressed4 = true;
    for (int j = 0; j < 5; j++) {
      for (int i = 0; i < 5; i++) {
        digitalWrite(yellowLedPins[i], HIGH);
        delay(200);
        digitalWrite(yellowLedPins[i], LOW);
      }
    }
  }

  if (digitalRead(buttonPin1) == HIGH) {
    buttonPressed1 = false;
  }
  if (digitalRead(buttonPin2) == HIGH) {
    buttonPressed2 = false;
  }
  if (digitalRead(buttonPin3) == HIGH) {
    buttonPressed3 = false;
  }
  if (digitalRead(buttonPin4) == HIGH) {
    buttonPressed4 = false;
  }
}