import logging
import os.path

import pytest
from mock import Mock
from pip._vendor import html5lib, requests

from pip._internal.download import PipSession
from pip._internal.index import (
    Link, PackageFinder, _clean_link, _determine_base_url, _egg_info_matches,
    _find_name_version_sep, _get_html_page,
)


def test_sort_locations_file_expand_dir(data):
    """
    Test that a file:// dir gets listdir run with expand_dir
    """
    finder = PackageFinder([data.find_links], [], session=PipSession())
    files, urls = finder._sort_locations([data.find_links], expand_dir=True)
    assert files and not urls, (
        "files and not urls should have been found at find-links url: %s" %
        data.find_links
    )


def test_sort_locations_file_not_find_link(data):
    """
    Test that a file:// url dir that's not a find-link, doesn't get a listdir
    run
    """
    finder = PackageFinder([], [], session=PipSession())
    files, urls = finder._sort_locations([data.index_url("empty_with_pkg")])
    assert urls and not files, "urls, but not files should have been found"


def test_sort_locations_non_existing_path():
    """
    Test that a non-existing path is ignored.
    """
    finder = PackageFinder([], [], session=PipSession())
    files, urls = finder._sort_locations(
        [os.path.join('this', 'doesnt', 'exist')])
    assert not urls and not files, "nothing should have been found"


class TestLink(object):

    def test_splitext(self):
        assert ('wheel', '.whl') == Link('http://yo/wheel.whl').splitext()

    @pytest.mark.parametrize(
        ("url", "expected"),
        [
            ("http://yo/wheel.whl", "wheel.whl"),
            ("http://yo/wheel", "wheel"),
            (
                "http://yo/myproject-1.0%2Bfoobar.0-py2.py3-none-any.whl",
                "myproject-1.0+foobar.0-py2.py3-none-any.whl",
            ),
        ],
    )
    def test_filename(self, url, expected):
        assert Link(url).filename == expected

    def test_no_ext(self):
        assert '' == Link('http://yo/wheel').ext

    def test_ext(self):
        assert '.whl' == Link('http://yo/wheel.whl').ext

    def test_ext_fragment(self):
        assert '.whl' == Link('http://yo/wheel.whl#frag').ext

    def test_ext_query(self):
        assert '.whl' == Link('http://yo/wheel.whl?a=b').ext

    def test_is_wheel(self):
        assert Link('http://yo/wheel.whl').is_wheel

    def test_is_wheel_false(self):
        assert not Link('http://yo/not_a_wheel').is_wheel

    def test_fragments(self):
        url = 'git+https://example.com/package#egg=eggname'
        assert 'eggname' == Link(url).egg_fragment
        assert None is Link(url).subdirectory_fragment
        url = 'git+https://example.com/package#egg=eggname&subdirectory=subdir'
        assert 'eggname' == Link(url).egg_fragment
        assert 'subdir' == Link(url).subdirectory_fragment
        url = 'git+https://example.com/package#subdirectory=subdir&egg=eggname'
        assert 'eggname' == Link(url).egg_fragment
        assert 'subdir' == Link(url).subdirectory_fragment


@pytest.mark.parametrize(
    ("html", "url", "expected"),
    [
        (b"<html></html>", "https://example.com/", "https://example.com/"),
        (
            b"<html><head>"
            b"<base href=\"https://foo.example.com/\">"
            b"</head></html>",
            "https://example.com/",
            "https://foo.example.com/",
        ),
        (
            b"<html><head>"
            b"<base><base href=\"https://foo.example.com/\">"
            b"</head></html>",
            "https://example.com/",
            "https://foo.example.com/",
        ),
    ],
)
def test_determine_base_url(html, url, expected):
    document = html5lib.parse(
        html, transport_encoding=None, namespaceHTMLElements=False,
    )
    assert _determine_base_url(document, url) == expected


class MockLogger(object):
    def __init__(self):
        self.called = False

    def warning(self, *args, **kwargs):
        self.called = True


@pytest.mark.parametrize(
    ("location", "trusted", "expected"),
    [
        ("http://pypi.org/something", [], True),
        ("https://pypi.org/something", [], False),
        ("git+http://pypi.org/something", [], True),
        ("git+https://pypi.org/something", [], False),
        ("git+ssh://git@pypi.org/something", [], False),
        ("http://localhost", [], False),
        ("http://127.0.0.1", [], False),
        ("http://example.com/something/", [], True),
        ("http://example.com/something/", ["example.com"], False),
        ("http://eXample.com/something/", ["example.cOm"], False),
    ],
)
def test_secure_origin(location, trusted, expected):
    finder = PackageFinder([], [], session=[], trusted_hosts=trusted)
    logger = MockLogger()
    finder._validate_secure_origin(logger, location)
    assert logger.called == expected


def test_get_formatted_locations_basic_auth():
    """
    Test that basic authentication credentials defined in URL
    is not included in formatted output.
    """
    index_urls = [
        'https://pypi.org/simple',
        'https://user:pass@repo.domain.com',
    ]
    finder = PackageFinder([], index_urls, session=[])

    result = finder.get_formatted_locations()
    assert 'user' in result
    assert '****' in result
    assert 'pass' not in result


@pytest.mark.parametrize(
    ("egg_info", "canonical_name", "expected"),
    [
        # Trivial.
        ("pip-18.0", "pip", 3),
        ("zope-interface-4.5.0", "zope-interface", 14),

        # Canonicalized name match non-canonicalized egg info. (pypa/pip#5870)
        ("Jinja2-2.10", "jinja2", 6),
        ("zope.interface-4.5.0", "zope-interface", 14),
        ("zope_interface-4.5.0", "zope-interface", 14),

        # Should be smart enough to parse ambiguous names from the provided
        # package name.
        ("foo-2-2", "foo", 3),
        ("foo-2-2", "foo-2", 5),

        # Should be able to detect collapsed characters in the egg info.
        ("foo--bar-1.0", "foo-bar", 8),
        ("foo-_bar-1.0", "foo-bar", 8),

        # The package name must not ends with a dash (PEP 508), so the first
        # dash would be the separator, not the second.
        ("zope.interface--4.5.0", "zope-interface", 14),
        ("zope.interface--", "zope-interface", 14),

        # The version part is missing, but the split function does not care.
        ("zope.interface-", "zope-interface", 14),
    ],
)
def test_find_name_version_sep(egg_info, canonical_name, expected):
    index = _find_name_version_sep(egg_info, canonical_name)
    assert index == expected


@pytest.mark.parametrize(
    ("egg_info", "canonical_name"),
    [
        # A dash must follow the package name.
        ("zope.interface4.5.0", "zope-interface"),
        ("zope.interface.4.5.0", "zope-interface"),
        ("zope.interface.-4.5.0", "zope-interface"),
        ("zope.interface", "zope-interface"),
    ],
)
def test_find_name_version_sep_failure(egg_info, canonical_name):
    with pytest.raises(ValueError) as ctx:
        _find_name_version_sep(egg_info, canonical_name)
    message = "{} does not match {}".format(egg_info, canonical_name)
    assert str(ctx.value) == message


@pytest.mark.parametrize(
    ("egg_info", "canonical_name", "expected"),
    [
        # Trivial.
        ("pip-18.0", "pip", "18.0"),
        ("zope-interface-4.5.0", "zope-interface", "4.5.0"),

        # Canonicalized name match non-canonicalized egg info. (pypa/pip#5870)
        ("Jinja2-2.10", "jinja2", "2.10"),
        ("zope.interface-4.5.0", "zope-interface", "4.5.0"),
        ("zope_interface-4.5.0", "zope-interface", "4.5.0"),

        # Should be smart enough to parse ambiguous names from the provided
        # package name.
        ("foo-2-2", "foo", "2-2"),
        ("foo-2-2", "foo-2", "2"),
        ("zope.interface--4.5.0", "zope-interface", "-4.5.0"),
        ("zope.interface--", "zope-interface", "-"),

        # Should be able to detect collapsed characters in the egg info.
        ("foo--bar-1.0", "foo-bar", "1.0"),
        ("foo-_bar-1.0", "foo-bar", "1.0"),

        # Invalid.
        ("the-package-name-8.19", "does-not-match", None),
        ("zope.interface.-4.5.0", "zope.interface", None),
        ("zope.interface-", "zope-interface", None),
        ("zope.interface4.5.0", "zope-interface", None),
        ("zope.interface.4.5.0", "zope-interface", None),
        ("zope.interface.-4.5.0", "zope-interface", None),
        ("zope.interface", "zope-interface", None),
    ],
)
def test_egg_info_matches(egg_info, canonical_name, expected):
    version = _egg_info_matches(egg_info, canonical_name)
    assert version == expected


def test_request_http_error(caplog):
    caplog.set_level(logging.DEBUG)
    link = Link('http://localhost')
    session = Mock(PipSession)
    session.get.return_value = resp = Mock()
    resp.raise_for_status.side_effect = requests.HTTPError('Http error')
    assert _get_html_page(link, session=session) is None
    assert (
        'Could not fetch URL http://localhost: Http error - skipping'
        in caplog.text
    )


def test_request_retries(caplog):
    caplog.set_level(logging.DEBUG)
    link = Link('http://localhost')
    session = Mock(PipSession)
    session.get.side_effect = requests.exceptions.RetryError('Retry error')
    assert _get_html_page(link, session=session) is None
    assert (
        'Could not fetch URL http://localhost: Retry error - skipping'
        in caplog.text
    )


@pytest.mark.parametrize(
    ("url", "clean_url"),
    [
        # URL with hostname and port. Port separator should not be quoted.
        ("https://localhost.localdomain:8181/path/with space/",
         "https://localhost.localdomain:8181/path/with%20space/"),
        # URL that is already properly quoted. The quoting `%`
        # characters should not be quoted again.
        ("https://localhost.localdomain:8181/path/with%20quoted%20space/",
         "https://localhost.localdomain:8181/path/with%20quoted%20space/"),
        # URL with IPv4 address and port.
        ("https://127.0.0.1:8181/path/with space/",
         "https://127.0.0.1:8181/path/with%20space/"),
        # URL with IPv6 address and port. The `[]` brackets around the
        # IPv6 address should not be quoted.
        ("https://[fd00:0:0:236::100]:8181/path/with space/",
         "https://[fd00:0:0:236::100]:8181/path/with%20space/"),
        # URL with query. The leading `?` should not be quoted.
        ("https://localhost.localdomain:8181/path/with/query?request=test",
         "https://localhost.localdomain:8181/path/with/query?request=test"),
        # URL with colon in the path portion.
        ("https://localhost.localdomain:8181/path:/with:/colon",
         "https://localhost.localdomain:8181/path%3A/with%3A/colon"),
        # URL with something that looks like a drive letter, but is
        # not. The `:` should be quoted.
        ("https://localhost.localdomain/T:/path/",
         "https://localhost.localdomain/T%3A/path/")
    ]
)
def test_clean_link(url, clean_url):
    assert(_clean_link(url) == clean_url)


@pytest.mark.parametrize(
    ("url", "clean_url"),
    [
        # URL with Windows drive letter. The `:` after the drive
        # letter should not be quoted. The trailing `/` should be
        # removed.
        ("file:///T:/path/with spaces/",
         "file:///T:/path/with%20spaces")
    ]
)
@pytest.mark.skipif("sys.platform != 'win32'")
def test_clean_link_windows(url, clean_url):
    assert(_clean_link(url) == clean_url)


@pytest.mark.parametrize(
    ("url", "clean_url"),
    [
        # URL with Windows drive letter, running on non-windows
        # platform. The `:` after the drive should be quoted.
        ("file:///T:/path/with spaces/",
         "file:///T%3A/path/with%20spaces/")
    ]
)
@pytest.mark.skipif("sys.platform == 'win32'")
def test_clean_link_non_windows(url, clean_url):
    assert(_clean_link(url) == clean_url)
