import re

CONVENTIONAL_PATTERN = re.compile(r'^(\w+)(?:\((\w+)\))?: (.+)$')

def validate_conventional(message):
    """Validate if message follows conventional commit format."""
    match = CONVENTIONAL_PATTERN.match(message.strip())
    return bool(match), match.group(0) if match else message

def fix_conventional(message, diff):
    """Attempt to fix conventional commit format."""
    message = message.strip()
    
    if not message:
        return None
    
    if ':' in message:
        parts = message.split(':', 1)
        return f"feat: {parts[1].strip()}"
    
    return f"feat: {message}"