from datetime import datetime


class Aliases:
    def __init__(self, filepath):
        self.filepath = filepath
        self.users = {}
        self.load()

    def __getitem__(self, key):
        if key in self.users:
            return self.users[key]
        else:
            try:
                index = [key.lower() for key in self.users].index(key.lower())
                return self.users[list(self.users.keys())[index]]
            except ValueError:
                # key really not found
                pass
        return key

    def load(self):
        with open(self.filepath) as file_handle:
            lines = file_handle.read().splitlines()

        for line in lines:
            if line.strip() != "" and not line.startswith("#"):
                datas = line.split("=")
                real_name = datas[0]
                for nick in datas[1].split(","):
                    self.users[nick] = real_name