#  Copyright (c) 2019. Vinci Consulting Corp. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

import ipaddress
import socket
import unittest

try:
    text_type = unicode
except NameError:
    text_type = str

from vpp_papi import vpp_format

from parameterized import parameterized

ip4_addr = "1.2.3.4"
ip4_addrn = b"\x01\x02\x03\x04"
ip4_prefix_len = 32
ip4_prefix = "%s/%s" % (ip4_addr, ip4_prefix_len)
ipv4_network = ipaddress.IPv4Network(text_type(ip4_prefix))
ip4_addr_format_vl_api_address_t = {"un": {"ip4": b"\x01\x02\x03\x04"}, "af": 0}
ip4_addr_format_vl_api_prefix_t = {
    "address": {"un": {"ip4": b"\x01\x02\x03\x04"}, "af": 0},  # noqa: E127,E501
    "len": ip4_prefix_len,
}
ip4_addr_format_vl_api_prefix_packed_t = {
    "address": b"\x01\x02\x03\x04",
    "len": ip4_prefix_len,
}

ip6_addr = "dead::"
ip6_addrn = b"\xde\xad\x00\x00\x00\x00\x00\x00" b"\x00\x00\x00\x00\x00\x00\x00\x00"
ip6_prefix_len = 127
ip6_prefix = "%s/%s" % (ip6_addr, ip6_prefix_len)
ipv6_network = ipaddress.IPv6Network(text_type(ip6_prefix))
ip6_addr_format_vl_api_address_t = {
    "un": {
        "ip6": b"\xde\xad\x00\x00"
        b"\x00\x00\x00\x00"
        b"\x00\x00\x00\x00"
        b"\x00\x00\x00\x00"
    },
    "af": 1,
}
ip6_addr_format_vl_api_prefix_t = {
    "address": {  # noqa: E127
        "af": 1,
        "un": {
            "ip6": b"\xde\xad\x00\x00"
            b"\x00\x00\x00\x00"
            b"\x00\x00\x00\x00"
            b"\x00\x00\x00\x00"
        },
    },
    "len": ip6_prefix_len,
}
ip6_addr_format_vl_api_prefix_packed_t = {
    "address": b"\xde\xad\x00\x00"  # noqa: E127,E501
    b"\x00\x00\x00\x00"
    b"\x00\x00\x00\x00"
    b"\x00\x00\x00\x00",
    "len": ip6_prefix_len,
}


class TestVppFormat(unittest.TestCase):
    def test_format_vl_api_address_t(self):
        res = vpp_format.format_vl_api_address_t(ip4_addr)
        self.assertEqual(res, ip4_addr_format_vl_api_address_t)

        # PY2: raises socket.error
        # PY3: raises OSError
        with self.assertRaises((TypeError, socket.error, OSError)):
            res = vpp_format.format_vl_api_address_t(ip4_addrn)

        res = vpp_format.format_vl_api_address_t(ip6_addr)
        self.assertEqual(res, ip6_addr_format_vl_api_address_t)

        with self.assertRaises(TypeError):
            es = vpp_format.format_vl_api_address_t(ip6_addrn)

    @parameterized.expand(
        [
            ("ip4 prefix", ip4_prefix, ip4_addr_format_vl_api_prefix_t),
            ("ip6 prefix", ip6_prefix, ip6_addr_format_vl_api_prefix_t),
            ("IPv4Network", ipv4_network, ip4_addr_format_vl_api_prefix_t),
            ("IPv6Network", ipv6_network, ip6_addr_format_vl_api_prefix_t),
        ]
    )
    def test_format_vl_api_prefix_t(self, _, arg, expected):
        res = vpp_format.format_vl_api_prefix_t(arg)
        self.assertEqual(res, expected)

    def test_format_vl_api_ip6_prefix_t(self):
        res = vpp_format.format_vl_api_ip6_prefix_t(ip6_prefix)
        self.assertEqual(res, ip6_addr_format_vl_api_prefix_packed_t)

        res = vpp_format.format_vl_api_ip6_prefix_t(ipv6_network)
        self.assertEqual(res, ip6_addr_format_vl_api_prefix_packed_t)

    def test_format_vl_api_ip4_prefix_t(self):
        res = vpp_format.format_vl_api_ip4_prefix_t(ip4_prefix)
        self.assertEqual(res, ip4_addr_format_vl_api_prefix_packed_t)

        res = vpp_format.format_vl_api_ip4_prefix_t(ipv4_network)
        self.assertEqual(res, ip4_addr_format_vl_api_prefix_packed_t)

    def test_format_vl_api_ip6_prefix_t_raises(self):
        # PY2: raises socket.error
        # PY3: raises OSError
        with self.assertRaises((socket.error, OSError)):
            res = vpp_format.format_vl_api_ip6_prefix_t(ip4_prefix)

    def test_format_vl_api_ip4_prefix_t_raises(self):
        # PY2: raises socket.error
        # PY3: raises OSError
        with self.assertRaises((socket.error, OSError)):
            res = vpp_format.format_vl_api_ip4_prefix_t(ip6_prefix)