import os
import configparser
from pathlib import Path

# Base directory for the component
BASE_DIR = Path(__file__).resolve().parent.parent
CONFIG_FILE = BASE_DIR / 'config.ini'

def get_config_value(section: str, key: str, fallback: str = None) -> str:
    """
    Get a configuration value with priority:
    1. Environment Variable (OVPMON_{SECTION}_{KEY})
    2. config.ini in the component root
    3. Fallback value
    """
    # 1. Check Environment Variable
    env_key = f"OVPMON_{section.upper()}_{key.upper()}".replace('-', '_').replace(' ', '_')
    env_val = os.getenv(env_key)
    if env_val is not None:
        return env_val

    # 2. Check config.ini
    if CONFIG_FILE.exists():
        try:
            config = configparser.ConfigParser()
            config.read(CONFIG_FILE)
            if config.has_section(section) and config.has_option(section, key):
                return config.get(section, key)
        except Exception as e:
            print(f"[CONFIG] Error reading {CONFIG_FILE}: {e}")

    return fallback