import pandas as pd
import argparse

def check_and_add_entry(file_path, host, database, username, password):
    # Read the existing CSV file
    try:
        df = pd.read_csv(file_path, sep=';', header=None, names=['host', 'database', 'username', 'password'])
    except FileNotFoundError:
        df = pd.DataFrame(columns=['host', 'database', 'username', 'password'])

    # Check if the entry exists
    mask = (df['host'] == host) & (df['database'] == database) & (df['username'] == username) & (df['password'] == password)
    if not df[mask].empty:
        print("Entry already exists.")
    else:
        # Add the new entry
        new_entry = {'host': host, 'database': database, 'username': username, 'password': password}
        df = df.append(new_entry, ignore_index=True)
        # Save the updated CSV file
        df.to_csv(file_path, sep=';', index=False)
        print("New entry added.")

def main():
    parser = argparse.ArgumentParser(description="Check and add a database entry to a CSV file.")
    parser.add_argument("file_path", help="Path to the CSV file")
    parser.add_argument("host", help="Database host")
    parser.add_argument("database", help="Database name")
    parser.add_argument("username", help="Username")
    parser.add_argument("password", help="Password")

    args = parser.parse_args()

    check_and_add_entry(args.file_path, args.host, args.database, args.username, args.password)

if __name__ == "__main__":
    main()