import java.util.ArrayList;
import java.util.Scanner;

public class NoteManager {
    public static void main(String[] args) {
        ArrayList notes = new ArrayList<>();
        Scanner input = new Scanner(System.in);
        int pilihan;

        do {
            System.out.println("\n=== Note Manager ===");
            System.out.println("1. Tambah Catatan");
            System.out.println("2. Lihat Semua Catatan");
            System.out.println("3. Hapus Catatan");
            System.out.println("4. Keluar");
            System.out.print("Pilih menu: ");
            pilihan = input.nextInt();
            input.nextLine(); // clear buffer

            switch (pilihan) {
                case 1:
                    System.out.print("Masukkan judul catatan: ");
                    String judul = input.nextLine();
                    System.out.print("Masukkan isi catatan: ");
                    String isi = input.nextLine();
                    notes.add(new Note(judul, isi));
                    System.out.println("Catatan berhasil ditambahkan!");
                    break;
                case 2:
                    System.out.println("\nDaftar Catatan:");
                    if (notes.isEmpty()) {
                        System.out.println("Belum ada catatan.");
                    } else {
                        for (int i = 0; i < notes.size(); i++) {
                            System.out.println((i + 1) + ". " + notes.get(i));
                        }
                    }
                    break;
                case 3:
                    System.out.print("Masukkan nomor catatan yang akan dihapus: ");
                    int index = input.nextInt();
                    if (index > 0 && index <= notes.size()) {
                        notes.remove(index - 1);
                        System.out.println("Catatan berhasil dihapus!");
                    } else {
                        System.out.println("Nomor tidak valid.");
                    }
                    break;
                case 4:
                    System.out.println("Terima kasih! Program selesai.");
                    break;
                default:
                    System.out.println("Pilihan tidak valid.");
            }
        } while (pilihan != 4);

        input.close();
    }
}