from contextlib import suppress

import filetype
from django.core.exceptions import ValidationError
from django.core.files.images import ImageFile, get_image_dimensions
from django.utils.translation import gettext_lazy as _

_BROWSER_VIDEO_MIMES = {"video/mp4", "video/webm", "video/ogg"}


def validate_browser_video(file) -> None:
    if not file:
        return
    kind = None
    with suppress(Exception):
        kind = filetype.guess(file)
    if not kind:
        raise ValidationError(_("could not determine file type"))
    file.seek(0)

    if kind is None or kind.mime not in _BROWSER_VIDEO_MIMES:
        supported = ", ".join(sorted(_BROWSER_VIDEO_MIMES))
        raise ValidationError(
            _(f"unsupported video format. supported formats: {supported}")
        )


def validate_category_image_dimensions(
    image: ImageFile, max_width: int | None = None, max_height: int | None = None
) -> None:
    max_width = max_width or 7680
    max_height = max_height or 4320

    if image:
        try:
            width, height = get_image_dimensions(image.file)  # ty: ignore[invalid-argument-type]
        except (FileNotFoundError, OSError, ValueError):
            return

        if width is None or height is None:
            return
        if int(width) > max_width or int(height) > max_height:
            raise ValidationError(
                _(
                    f"image dimensions should not exceed w{max_width} x h{max_height} pixels"
                )
            )