from models.database import Database

class UserModel:
    def __init__(self, database):
        self.db = database

    def authenticate(self, login, password):
        sql = """
        SELECT u.login, u.password, u.full_name, r.role_name
        FROM users u
        JOIN roles r ON u.role_id = r.role_id
        WHERE u.login = %s AND u.password = %s
        """
        row = self.db.fetch_one(sql, (login, password))
        if row:
            return {
                "login": row[0],
                "password": row[1],
                "full_name": row[2],
                "role_name": row[3],
            }
        return None