from __future__ import annotations

import platform
import sys
from importlib.metadata import version
from warnings import warn

import lxml.etree

from scrapy.exceptions import ScrapyDeprecationWarning
from scrapy.settings.default_settings import LOG_VERSIONS
from scrapy.utils.ssl import get_openssl_version

_DEFAULT_SOFTWARE: list[str] = ["Scrapy", *LOG_VERSIONS]


def _version(item: str) -> str:
    lowercase_item = item.lower()
    if lowercase_item == "libxml2":
        return ".".join(map(str, lxml.etree.LIBXML_VERSION))
    if lowercase_item == "platform":
        return platform.platform()
    if lowercase_item == "pyopenssl":
        return get_openssl_version()
    if lowercase_item == "python":
        return sys.version.replace("\n", "- ")
    return version(item)


def get_versions(
    software: list[str] | None = None,
) -> list[tuple[str, str]]:
    software = software or _DEFAULT_SOFTWARE
    return [(item, _version(item)) for item in software]


def scrapy_components_versions() -> list[tuple[str, str]]:  # pragma: no cover
    warn(
        (
            "scrapy.utils.versions.scrapy_components_versions() is deprecated, "
            "use scrapy.utils.versions.get_versions() instead."
        ),
        ScrapyDeprecationWarning,
        stacklevel=2,
    )
    return get_versions()
