import os
from typing import Optional
from enhancer.utils.config import Files

def check_files(root_dir:str, files:Files):

    path_variables = [member_var for member_var in dir(files) if not member_var.startswith('__')]
    for variable in path_variables:
        path = getattr(files,variable)
        if not os.path.isdir(os.path.join(root_dir,path)):
            raise ValueError(f"Invalid {path}, is not a directory")
            
    return files,root_dir

def merge_dict(default_dict:dict, custom:Optional[dict]=None):
    params = dict(default_dict)
    if custom:
        params.update(custom)
    return params