import socket
from .testing import mockserver
import pydu.request
from pydu.network import get_free_port
from pydu.request import FileName, check_connect, update_query_params, cookies_str_to_dict


def test_filename_from_url():
    url = 'http://www.example.com/test.txt'
    assert FileName.from_url(url) == 'test.txt'

    url = 'http://www.example.com/'
    assert FileName.from_url(url) is None


def test_filename_from_headers():
    headers = {'Content-Disposition': 'attachment; filename=test.txt'}
    assert FileName.from_headers(headers) == 'test.txt'

    headers = [('Content-Disposition', 'attachment; filename=test.txt')]
    assert FileName.from_headers(headers) == 'test.txt'

    headers = 'Content-Disposition: attachment; filename=test.txt'
    assert FileName.from_headers(headers) == 'test.txt'

    headers = 'Content-Disposition: attachment; filename=abc/test.txt'
    assert FileName.from_headers(headers) == 'test.txt'

    headers = ''
    assert FileName.from_headers(headers) is None

    headers = 'Content-Disposition: abc'
    assert FileName.from_headers(headers) is None

    headers = 'Content-Disposition: abc;'
    assert FileName.from_headers(headers) is None

    headers = 'Content-Disposition: attachment; filename=test.txt; filename=test2.txt'
    assert FileName.from_headers(headers) is None

    headers = 'Content-Disposition: attachment; filename='
    assert FileName.from_headers(headers) is None


@mockserver
def test_check_connect(port=None):
    assert check_connect('127.0.0.1', port=port, timeout=0.01)
    assert not check_connect('127.0.0.1', port=get_free_port(), timeout=0.01)

    def mock_socket(*args):
        raise socket.error

    old_socket = pydu.request.socket.socket
    pydu.request.socket.socket = mock_socket
    assert not check_connect('127.0.0.1', port=port, timeout=0.01)
    pydu.request.socket.socket = old_socket


def test_update_query_params():
    base = 'http://example.com/'
    assert update_query_params(base, {'foo': 1}) == base + '?foo=1'
    assert update_query_params(base + '?foo=1', {'foo': 2}) == base + '?foo=2'
    assert update_query_params(base + '?foo=1', {'foo': 2, 'bar': 3}) in \
           (base + '?foo=2&bar=3', base + '?bar=3&foo=2')


def test_cookies_str_to_dict():
    cookies = cookies_str_to_dict('a=a;  \tb=b;\nc=c;d;e=')
    assert cookies['a'] == 'a'
    assert cookies['b'] == 'b'
    assert cookies['c'] == 'c'
    assert cookies['e'] == ''