#include <LiquidCrystal.h>

// Inisialisasi pin LCD
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Definisi pin
const int coinButton = 7;
const int coffeeButton = 6;
const int sugarButton = 13;

const int coffeeRelay = 10;
const int sugarRelay = 9;
const int waterRelay = 8;

// Variabel untuk koin
int coins = 0;

void setup() {
  // Inisialisasi pin tombol
    pinMode(coinButton, INPUT_PULLUP);
      pinMode(coffeeButton, INPUT_PULLUP);
        pinMode(sugarButton, INPUT_PULLUP);

          // Inisialisasi pin relay
            pinMode(coffeeRelay, OUTPUT);
              pinMode(sugarRelay, OUTPUT);
                pinMode(waterRelay, OUTPUT);

                  // Matikan relay di awal
                    digitalWrite(coffeeRelay, LOW);
                      digitalWrite(sugarRelay, LOW);
                        digitalWrite(waterRelay, LOW);

                          // Inisialisasi LCD
                            lcd.begin(16, 2);
                              lcd.setCursor(0, 0);
                                lcd.print("Selamat Datang!");
                                  lcd.setCursor(0, 1);
                                    lcd.print("Masukkan 4 coin");
                                    }

                                    void loop() {
                                      // Deteksi coin input
                                        if (digitalRead(coinButton) == LOW) {
                                            delay(200); // Debounce
                                                coins++;
                                                    lcd.clear();
                                                        lcd.setCursor(0, 0);
                                                            lcd.print("Koin: ");
                                                                lcd.print(coins);
                                                                    delay(500);
                                                                      }

                                                                        // Jika koin cukup
                                                                          if (coins >= 4) {
                                                                              lcd.clear();
                                                                                  lcd.setCursor(0, 0);
                                                                                      lcd.print("Pilih Minuman");

                                                                                          // Deteksi tombol kopi hitam
                                                                                              if (digitalRead(coffeeButton) == LOW) {
                                                                                                    delay(200); // Debounce
                                                                                                          lcd.clear();
                                                                                                                lcd.setCursor(0, 0);
                                                                                                                      lcd.print("Membuat Kopi...");
                                                                                                                            digitalWrite(coffeeRelay, HIGH);
                                                                                                                                  delay(3000); // Kopi keluar 3 detik
                                                                                                                                        digitalWrite(coffeeRelay, LOW);

                                                                                                                                              // Air panas
                                                                                                                                                    lcd.setCursor(0, 1);
                                                                                                                                                          lcd.print("Menambahkan Air");
                                                                                                                                                                digitalWrite(waterRelay, HIGH);
                                                                                                                                                                      delay(3000); // Air panas 3 detik
                                                                                                                                                                            digitalWrite(waterRelay, LOW);
                                                                                                                                                                                  lcd.clear();
                                                                                                                                                                                        lcd.setCursor(0, 0);
                                                                                                                                                                                              lcd.print("Kopi Siap!");
                                                                                                                                                                                                    lcd.setCursor(0, 1);
                                                                                                                                                                                                          lcd.print("Tambah gula?");
                                                                                                                                                                                                                delay(3000); // Tampilkan pesan selama 3 detik
                                                                                                                                                                                                                    }

                                                                                                                                                                                                                        // Deteksi tombol gula setelah kopi disiapkan
                                                                                                                                                                                                                            if (digitalRead(sugarButton) == LOW) {
                                                                                                                                                                                                                                  delay(200); // Debounce
                                                                                                                                                                                                                                        lcd.clear();
                                                                                                                                                                                                                                              lcd.setCursor(0, 0);
                                                                                                                                                                                                                                                    lcd.print("Menambah Gula...");
                                                                                                                                                                                                                                                          digitalWrite(sugarRelay, HIGH);
                                                                                                                                                                                                                                                                delay(2000); // Gula keluar 2 detik
                                                                                                                                                                                                                                                                      digitalWrite(sugarRelay, LOW);
                                                                                                                                                                                                                                                                            lcd.clear();
                                                                                                                                                                                                                                                                                  lcd.setCursor(0, 0);
                                                                                                                                                                                                                                                                                        lcd.print("Kopi Manis Siap!");
                                                                                                                                                                                                                                                                                              delay(2000);
                                                                                                                                                                                                                                                                                                  }
                                                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                                                    }