from zipfile import BadZipfile

from pip._vendor.pkg_resources import Requirement
from pytest import fixture, mark, raises

from pip._internal.network.lazy_wheel import (
    HTTPRangeRequestUnsupported,
    dist_from_wheel_url,
)
from pip._internal.network.session import PipSession
from tests.lib.server import file_response

MYPY_0_782_WHL = (
    'https://files.pythonhosted.org/packages/9d/65/'
    'b96e844150ce18b9892b155b780248955ded13a2581d31872e7daa90a503/'
    'mypy-0.782-py3-none-any.whl'
)
MYPY_0_782_REQS = {
    Requirement('typed-ast (<1.5.0,>=1.4.0)'),
    Requirement('typing-extensions (>=3.7.4)'),
    Requirement('mypy-extensions (<0.5.0,>=0.4.3)'),
    Requirement('psutil (>=4.0); extra == "dmypy"'),
}


@fixture
def session():
    return PipSession()


@fixture
def mypy_whl_no_range(mock_server, shared_data):
    mypy_whl = shared_data.packages / 'mypy-0.782-py3-none-any.whl'
    mock_server.set_responses([file_response(mypy_whl)])
    mock_server.start()
    base_address = 'http://{}:{}'.format(mock_server.host, mock_server.port)
    yield "{}/{}".format(base_address, 'mypy-0.782-py3-none-any.whl')
    mock_server.stop()


@mark.network
def test_dist_from_wheel_url(session):
    """Test if the acquired distribution contain correct information."""
    dist = dist_from_wheel_url('mypy', MYPY_0_782_WHL, session)
    assert dist.key == 'mypy'
    assert dist.version == '0.782'
    assert dist.extras == ['dmypy']
    assert set(dist.requires(dist.extras)) == MYPY_0_782_REQS


def test_dist_from_wheel_url_no_range(session, mypy_whl_no_range):
    """Test handling when HTTP range requests are not supported."""
    with raises(HTTPRangeRequestUnsupported):
        dist_from_wheel_url('mypy', mypy_whl_no_range, session)


@mark.network
def test_dist_from_wheel_url_not_zip(session):
    """Test handling with the given URL does not point to a ZIP."""
    with raises(BadZipfile):
        dist_from_wheel_url('python', 'https://www.python.org/', session)