import re
import pytest
import tornado
from jupyter_server.base.handlers import path_regex
from jupyter_server.utils import url_path_join

# build regexps that tornado uses:
path_pat = re.compile('^' + '/x%s' % path_regex + '$')

def test_path_regex():
    for path in (
        '/x',
        '/x/',
        '/x/foo',
        '/x/foo.ipynb',
        '/x/foo/bar',
        '/x/foo/bar.txt',
    ):
        assert re.match(path_pat, path)

def test_path_regex_bad():
    for path in (
        '/xfoo',
        '/xfoo/',
        '/xfoo/bar',
        '/xfoo/bar/',
        '/x/foo/bar/',
        '/x//foo',
        '/y',
        '/y/x/foo',
    ):
        assert re.match(path_pat, path) is None


@pytest.mark.parametrize(
    'uri,expected',
    [
        ("/notebooks/mynotebook/", "/notebooks/mynotebook"),
        ("////foo///", "/foo"),
        ("//example.com/", "/example.com"),
        ("/has/param/?hasparam=true", "/has/param?hasparam=true"),
    ]
)
async def test_trailing_slash(jp_ensure_app_fixture, uri, expected, http_server_client, jp_auth_header, jp_base_url):
    # http_server_client raises an exception when follow_redirects=False
    with pytest.raises(tornado.httpclient.HTTPClientError) as err:
        await http_server_client.fetch(
            url_path_join(jp_base_url, uri),
            headers=jp_auth_header,
            request_timeout=20,
            follow_redirects=False
        )
    # Capture the response from the raised exception value.
    response = err.value.response
    assert response.code == 302
    assert "Location" in response.headers
    assert response.headers["Location"] == url_path_join(jp_base_url, expected)
