import ftplib

def connect_ftp(server, username, password):
    """
    Membuat koneksi ke server FTP dan login.
    """
    try:
        ftp = ftplib.FTP(server)
        ftp.login(user=username, passwd=password)
        print(f"Berhasil terhubung ke {server}")
        return ftp
    except ftplib.error_perm as e:
        print(f"Login gagal: {e}")
        exit(1)
    except Exception as e:
        print(f"Kesalahan koneksi: {e}")
        exit(1)


def list_directory(ftp):
    """
    Menampilkan daftar file di direktori server FTP.
    """
    try:
        print("Daftar file di direktori server:")
        ftp.retrlines("LIST")
    except Exception as e:
        print(f"Kesalahan saat membaca direktori: {e}")


def upload_file(ftp, local_file, remote_file):
    """
    Mengunggah file ke server FTP.
    """
    try:
        with open(local_file, "rb") as f:
            ftp.storbinary(f"STOR {remote_file}", f)
        print(f"File {local_file} berhasil diunggah sebagai {remote_file}.")
    except Exception as e:
        print(f"Kesalahan saat mengunggah file: {e}")


def download_file(ftp, remote_file, local_file):
    """
    Mengunduh file dari server FTP.
    """
    try:
        with open(local_file, "wb") as f:
            ftp.retrbinary(f"RETR {remote_file}", f.write)
        print(f"File {remote_file} berhasil diunduh sebagai {local_file}.")
    except Exception as e:
        print(f"Kesalahan saat mengunduh file: {e}")


def main():
    server = "192.168.56.105"
    username = "anehinnn"
    password = "1234"

    ftp = connect_ftp(server, username, password)

    try:
        list_directory(ftp)

        upload_file(ftp, "220010178_ibnu.txt", "ibnu_upload.txt")

        download_file(ftp, "ibnu_upload.txt", "local_download.txt")

        list_directory(ftp)
    finally:
        ftp.quit()
        print("Koneksi FTP ditutup.")


if __name__ == "__main__":
    main()