from __future__ import annotations

from fnmatch import fnmatch
from pathlib import Path

IGNORE_FILE_NAME = '.nanoshareignore'

def load_ignore_patterns(root: Path, extra_patterns: list[str] | None = None) -> list[str]:
  patterns = [IGNORE_FILE_NAME]
  ignore_file = root / IGNORE_FILE_NAME
  if ignore_file.is_file():
    for line in ignore_file.read_text().splitlines():
      pattern = line.strip()
      if pattern and not pattern.startswith('#'):
        patterns.append(pattern)
  patterns.extend(pattern for pattern in extra_patterns or [] if pattern)
  return patterns

def is_ignored(rel_path: str, patterns: list[str]) -> bool:
  path = rel_path.strip('/')
  parts = path.split('/')
  for pattern in patterns:
    normalized = pattern.strip().replace('\\', '/').strip('/')
    if not normalized:
      continue
    if pattern.endswith('/'):
      if path == normalized or path.startswith(f'{normalized}/'):
        return True
      continue
    if '/' in normalized:
      if fnmatch(path, normalized):
        return True
    elif any(fnmatch(part, normalized) for part in parts):
      return True
  return False