import ipaddress
import os
import pytest
import requests

from django.test import override_settings
from django.core.exceptions import ValidationError

from peeringdb_server.validators import (
    validate_address_space,
    validate_info_prefixes4,
    validate_info_prefixes6,
    validate_prefix_overlap,
    validate_phonenumber,
    validate_irr_as_set,
)

from peeringdb_server.models import (
    Organization,
    InternetExchange,
    IXLan,
    IXLanPrefix,
    Network,
    NetworkContact,
)

pytestmark = pytest.mark.django_db

INVALID_ADDRESS_SPACES = [
    "0.0.0.0/1",
    "0.0.0.0/8",
    "10.0.0.0/8",
    "127.0.0.0/8",
    "169.254.0.0/16",
    # FIXME: this fails still
    #'172.0.0.0/11',
    "172.16.0.0/12",
    "192.0.2.0/24",
    "192.168.0.0/16",
    "198.18.0.0/15",
    "198.51.100.0/24",
    "203.0.113.0/24",
    # FIXME: this fails still
    #'224.0.0.0/3',
    "224.0.0.0/4",
    "240.0.0.0/4",
    "100.64.0.0/10",
    "0000::/8",
    "0064:ff9b::/96",
    "0100::/8",
    "0200::/7",
    "0400::/6",
    "0800::/5",
    "1000::/4",
    "2001::/33",
    "2001:0:8000::/33",
    "2001:0002::/48",
    "2001:0003::/32",
    "2001:10::/28",
    "2001:20::/28",
    "2001:db8::/32",
    "2002::/16",
    "3ffe::/16",
    "4000::/2",
    "4000::/3",
    "5f00::/8",
    "6000::/3",
    "8000::/3",
    "a000::/3",
    "c000::/3",
    "e000::/4",
    "f000::/5",
    "f800::/6",
    "fc00::/7",
    "fe80::/10",
    "fec0::/10",
    "ff00::/8",
]


@pytest.fixture(params=INVALID_ADDRESS_SPACES)
def prefix(request):
    return request.param


# @pytest.mark.django_db
def test_validate_address_space(prefix):
    """
    Tests peeringdb_server.validators.validate_address_space
    """
    with pytest.raises(ValidationError) as exc:
        validate_address_space(ipaddress.ip_network(str(prefix)))


@override_settings(DATA_QUALITY_MAX_PREFIX_V4_LIMIT=500000)
def test_validate_info_prefixes4():
    """
    Tests peeringdb_server.validators.validate_info_prefixes4
    """
    with pytest.raises(ValidationError):
        validate_info_prefixes4(500001)
    with pytest.raises(ValidationError):
        validate_info_prefixes4(-1)
    validate_info_prefixes4(500000)


@override_settings(DATA_QUALITY_MAX_PREFIX_V6_LIMIT=500000)
def test_validate_info_prefixes6():
    """
    Tests peeringdb_server.validators.validate_info_prefixes6
    """
    with pytest.raises(ValidationError):
        validate_info_prefixes6(500001)
    with pytest.raises(ValidationError):
        validate_info_prefixes6(-1)
    validate_info_prefixes6(500000)


@override_settings(
    DATA_QUALITY_MIN_PREFIXLEN_V4=24,
    DATA_QUALITY_MAX_PREFIXLEN_V4=24,
    DATA_QUALITY_MIN_PREFIXLEN_V6=48,
    DATA_QUALITY_MAX_PREFIXLEN_V6=48,
)
def test_validate_prefixlen():
    """
    Tests prefix length limits
    """
    with pytest.raises(ValidationError):
        validate_address_space("37.77.32.0/20")
    with pytest.raises(ValidationError):
        validate_address_space("131.72.77.240/28")
    with pytest.raises(ValidationError):
        validate_address_space("2403:c240::/32")
    with pytest.raises(ValidationError):
        validate_address_space("2001:504:0:2::/64")


@pytest.mark.django_db
def test_validate_prefix_overlap():
    org = Organization.objects.create(name="Test org", status="ok")
    ix = InternetExchange.objects.create(name="Text exchange", status="ok", org=org)
    ixlan = ix.ixlan

    pfx1 = IXLanPrefix.objects.create(
        ixlan=ixlan,
        protocol="IPv4",
        prefix=ipaddress.ip_network("198.32.125.0/24"),
        status="ok",
    )

    with pytest.raises(ValidationError) as exc:
        validate_prefix_overlap("198.32.124.0/23")

@pytest.mark.parametrize("value,validated", [
    # success validation
    ("RIPE::AS-FOO", "RIPE::AS-FOO"),
    ("AS-FOO@RIPE", "AS-FOO@RIPE"),
    ("AS-FOO-BAR@RIPE", "AS-FOO-BAR@RIPE"),
    ("ripe::as-foo", "RIPE::AS-FOO"),
    ("as-foo@ripe", "AS-FOO@RIPE"),
    ("as-foo@ripe as-bar@ripe", "AS-FOO@RIPE AS-BAR@RIPE"),
    ("as-foo@ripe,as-bar@ripe", "AS-FOO@RIPE AS-BAR@RIPE"),
    ("as-foo@ripe, as-bar@ripe", "AS-FOO@RIPE AS-BAR@RIPE"),
    (
        "RIPE::AS12345:AS-FOO RIPE::AS12345:AS-FOO:AS9876",
        "RIPE::AS12345:AS-FOO RIPE::AS12345:AS-FOO:AS9876"
    ),
    ("ripe::as-foo:as123:as345", "RIPE::AS-FOO:AS123:AS345"),
    ("RIPE::AS12345", "RIPE::AS12345"),
    ("AS12345@RIPE", "AS12345@RIPE"),
    ("RIPE::AS123456:RS-FOO", "RIPE::AS123456:RS-FOO"),

    # fail validation
    ("AS-FOO", False),
    ("UNKNOWN::AS-FOO", False),
    ("AS-FOO@UNKNOWN", False),
    ("ASFOO@UNKNOWN", False),
    ("UNKNOWN::ASFOO", False),
    ("AS-FOO RIPE:AS-FOO", False),
    ("AS-FOO AS-FOO@RIPE", False),
    ("RIPE::RS15562:RS-FOO", False),
    ("RIPE::AS123456:RS-FOO:AS-FOO", False),

    # > DATA_QUALITY_MAX_IRR_DEPTH
    ("ripe::as-foo:as123:as345:as678", False),
])
def test_validate_irr_as_set(value, validated):
    if not validated:
        with pytest.raises(ValidationError):
            validate_irr_as_set(value)
    else:
        assert validate_irr_as_set(value) == validated


@pytest.mark.djangodb
def test_validate_phonenumber():

    # test standalone validator

    validate_phonenumber("+1 206 555 0199")
    validate_phonenumber("012065550199", "US")

    with pytest.raises(ValidationError):
        validate_phonenumber("invalid number")

    with pytest.raises(ValidationError):
        validate_phonenumber("012065550199")

    # test model field validation

    org = Organization.objects.create(name="Test org", status="ok")
    ix = InternetExchange.objects.create(
        name="Text exchange",
        status="ok",
        org=org,
        country="US",
        city="Some city",
        region_continent="North America",
        media="Ethernet",
    )
    net = Network.objects.create(name="Text network", asn=12345, status="ok", org=org)
    poc = NetworkContact.objects.create(network=net, status="ok", role="Abuse")

    # test poc phone validation

    with pytest.raises(ValidationError):
        poc.phone = "invalid"
        poc.full_clean()

    poc.phone = "+1 206 555 0199"
    poc.full_clean()

    # test ix phone validation

    with pytest.raises(ValidationError):
        ix.tech_phone = "invalid"
        ix.full_clean()

    ix.tech_phone = "+1 206 555 0199"
    ix.full_clean()

    with pytest.raises(ValidationError):
        ix.policy_phone = "invalid"
        ix.full_clean()

    ix.policy_phone = "+1 206 555 0199"
    ix.full_clean()