import pytest
from pydu.network import (dotted_netmask, is_ipv4, is_ipv6, get_free_port,
                          ip2int, int2ip)


@pytest.mark.parametrize(
    'mask, expected', (
        (8, '255.0.0.0'),
        (24, '255.255.255.0'),
        (25, '255.255.255.128'),
    ))
def test_dotted_netmask(mask, expected):
    assert dotted_netmask(mask) == expected


class TestIsIPv4Address:

    def test_valid(self):
        assert is_ipv4('8.8.8.8')

    @pytest.mark.parametrize('value', ('8.8.8.8.8', 'localhost.localdomain'))
    def test_invalid(self, value):
        assert not is_ipv4(value)


class TestIsIPv6Address:

    def test_valid(self):
        assert is_ipv6('fe80::9e5b:b149:e187:1a18')

    @pytest.mark.parametrize('value', ('fe80::9e5b:b149:e187::', 'localhost.localdomain'))
    def test_invalid(self, value):
        assert not is_ipv6(value)


def test_get_free_port():
    port = get_free_port()
    assert isinstance(port, int)
    assert 65536 > port > 0


def test_ip2int():
    assert ip2int('10.1.1.1') == 167837953
    with pytest.raises(ValueError):
        ip2int('255.255.255.256')

    assert ip2int('fe80::9e5b:b149:e187:1a18') == 338288524927261089665429805853095434776
    with pytest.raises(ValueError):
        ip2int('fe80::9e5b:b149:e187::')


def test_int2ip():
    assert int2ip(167837953) == '10.1.1.1'
    assert int2ip(338288524927261089665429805853095434776) == 'fe80::9e5b:b149:e187:1a18'
    with pytest.raises(ValueError):
        int2ip(10**50)