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                                                                                                                                                                                     import re
from logger_config import get_logger


def get_csf_config_value(
    var_name: str, config_file="/etc/csf/csf.conf"
) -> str | None:
    logger = get_logger()
    try:
        with open(config_file, "r") as f:
            for line in f:
                # Strip whitespace and skip empty lines and comments
                line = line.strip()
                if not line or line.startswith("#"):
                    continue

                # Match pattern: VAR_NAME = "value" (with flexible whitespace)
                # This regex handles:
                # - Optional whitespace around = (e.g. VAR_NAME="value" or VAR_NAME= "value")
                # - Quoted values (double quotes, single quotes are not valid in CSF config)
                # - Captures the value inside quotes (e.g. "value")
                pattern = rf'^{re.escape(var_name)}\s*=\s*["]([^"]*)["]'
                match = re.match(pattern, line)

                if match:
                    return match.group(1)

        # Variable not found
        return None

    except FileNotFoundError:
        logger.error(f"Config file {config_file} not found")
        return None
    except PermissionError:
        logger.error(f"Permission denied reading {config_file}")
        return None
    except Exception as e:
        logger.error(f"Error reading config file: {e}")
        return None