import platform
from pathlib import Path
from typing import Optional

from .constants import def_paths, sc_pathpatterns


def get_screenshots(path: Optional[str | Path] = None) -> list[str]:
    """Find screenshot files for the current OS."""
    if path is None:
        path = def_paths.get(platform.system(), Path.home())
    path = Path(path)
    patterns = sc_pathpatterns.get(platform.system(), ["SCR*.png"])
    results = []
    for pattern in patterns:
        results.extend(str(f.absolute()) for f in path.glob(pattern))
    return sorted(set(results))