"""
Simple dotenv implementation for loading environment variables from .env files.
This is a compatibility layer for the agent-zero framework.
"""

import os
import re
from typing import Optional, Dict

def load_dotenv(path: Optional[str] = None) -> bool:
    """
    Load environment variables from a .env file.
    
    Args:
        path: Path to the .env file. If None, looks for .env in current directory.
        
    Returns:
        True if the file was loaded successfully, False otherwise.
    """
    if path is None:
        path = ".env"
    
    if not os.path.exists(path):
        return False
    
    try:
        with open(path, "r") as f:
            for line in f:
                line = line.strip()
                # Skip empty lines and comments
                if not line or line.startswith("#"):
                    continue
                
                # Match KEY=VALUE or KEY="VALUE" or KEY='VALUE'
                match = re.match(r'^([A-Za-z_][A-Za-z0-9_]*)=(.*)$', line)
                if match:
                    key = match.group(1)
                    value = match.group(2)
                    
                    # Remove quotes if present
                    if (value.startswith('"') and value.endswith('"')) or \
                       (value.startswith("'") and value.endswith("'")):
                        value = value[1:-1]
                    
                    # Set environment variable
                    os.environ[key] = value
        
        return True
    except Exception:
        return False