import os
import configparser

from typing import Optional

class ConfigException(Exception):
    def __init__(self, path: str):
        self.path = path

    def __str__(self):
        return "Unable to locate file '" + self.path + "'"

class Config():
    SEARCH_PATHS = [
        './server.conf',
        '/etc/nntp-tiny/server.conf'
    ]

    @staticmethod
    def find():
        for path in Config.SEARCH_PATHS:
            if os.path.exists(path):
                return path

        return None

    def load(path: Optional[str]=None):
        if path is None:
            path = Config.find()
            
        if path is None:
            raise ConfigException(path)

        parser = configparser.ConfigParser()
        parser.read(path)

        return parser