from typing import Optional
from os import path
from . import cktype


class FILE:
    def __init__(self, fpath: str, esum: Optional[str] = None):
        self.fpath = fpath
        self.fname = path.basename(fpath)
        self.csum, self.esum = cktype.resolve(self.fname, esum)

    def __repr__(self):
        return self.fname

    def verify(self) -> Optional[bool]:
        if self.esum is None:
            return None
        return self.csum.__repr__() == self.esum