from __future__ import annotations

from pip._internal.distributions.base import AbstractDistribution
from pip._internal.index.package_finder import PackageFinder
from pip._internal.metadata import BaseDistribution
from pip._internal.metadata import FilesystemWheel
from pip._internal.metadata import get_wheel_distribution
from pip._vendor.packaging.utils import canonicalize_name


class WheelDistribution(AbstractDistribution):
    """Represents a wheel distribution.

    This does not need any preparation as wheels can be directly unpacked.
    """

    def get_metadata_distribution(self) -> BaseDistribution:
        """Loads the metadata from the wheel file into memory and returns a
        Distribution that uses it, not relying on the wheel file or
        requirement.
        """
        assert self.req.local_file_path, 'Set as part of preparation during download'
        assert self.req.name, 'Wheels are never unnamed'
        wheel = FilesystemWheel(self.req.local_file_path)
        return get_wheel_distribution(wheel, canonicalize_name(self.req.name))

    def prepare_distribution_metadata(
        self, finder: PackageFinder, build_isolation: bool,
    ) -> None:
        pass