# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import absolute_import, division, print_function

import pytest

from cryptography.hazmat.backends.openssl import backend as openssl_backend

from .utils import (
    check_backend_support, load_wycheproof_tests, skip_if_wycheproof_none
)


def pytest_report_header(config):
    return "OpenSSL: {}".format(openssl_backend.openssl_version_text())


def pytest_addoption(parser):
    parser.addoption("--wycheproof-root", default=None)


def pytest_generate_tests(metafunc):
    if "wycheproof" in metafunc.fixturenames:
        wycheproof = metafunc.config.getoption("--wycheproof-root")
        skip_if_wycheproof_none(wycheproof)

        testcases = []
        marker = metafunc.definition.get_closest_marker("wycheproof_tests")
        for path in marker.args:
            testcases.extend(load_wycheproof_tests(wycheproof, path))
        metafunc.parametrize("wycheproof", testcases)


@pytest.fixture()
def backend(request):
    required_interfaces = [
        mark.kwargs["interface"]
        for mark in request.node.iter_markers("requires_backend_interface")
    ]
    if not all(
        isinstance(openssl_backend, iface) for iface in required_interfaces
    ):
        pytest.skip(
            "OpenSSL doesn't implement required interfaces: {}".format(
                required_interfaces
            )
        )

    check_backend_support(openssl_backend, request)
    return openssl_backend
