import os
import logging
from dotenv import load_dotenv

log = logging.getLogger("ainventory")

def load_config():
    """
    Centralized environment loader for TFM aInventory.
    Prioritizes existing environment variables (Docker), 
    then inventory.env at project root, then backend/.env.
    """
    # Base directory is backend/
    base_dir = os.path.dirname(os.path.abspath(__file__))
    # Project root is one level up
    project_root = os.path.dirname(base_dir)
    
    inventory_env_path = os.path.join(project_root, "inventory.env")
    backend_env_path = os.path.join(base_dir, ".env")
    
    # Check for inventory.env in root (Master Config)
    if os.path.exists(inventory_env_path):
        load_dotenv(inventory_env_path)
        log.info(f"✅ Loaded master configuration from {inventory_env_path}")
    
    # Check for local backend/.env (Legacy/Fragmented)
    elif os.path.exists(backend_env_path):
        load_dotenv(backend_env_path)
        log.info(f"ℹ️ Loaded local configuration from {backend_env_path}")
    else:
        log.info("ℹ️ [CONFIG] Using system environment variables (Docker/Server environment).")

# Auto-run if imported
load_config()