from pathlib import Path
from PyTeX.errors import *
from .checksum import md5
from typing import Optional, List, Dict


def ensure_file_integrity(file: Path, output_file_name: str, build_info: Optional[List[Dict]] = None):
    if file.exists():
        if not build_info:
            raise UnknownFileInBuildDirectoryError(str(file))
        found = False
        for info in build_info:
            if info['name'] == output_file_name:
                if not md5(file) == info['md5sum']:
                    raise ModifiedFileInBuildDirectoryError(str(file))
                found = True
        if not found:
            raise UnknownFileInBuildDirectoryError(str(file))