#!/usr/bin/python3
#
# Copyright: 2021 Sipwise Development Team <support@sipwise.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This package is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# On Debian systems, the complete text of the GNU General
# Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".
#
import os
import sys
import logging
from collections import namedtuple
import filecmp
import difflib

lib_path = os.path.abspath("bin")
sys.path.append(lib_path)

from generate_test_tt2 import load_msg, load_yaml  # noqa
from generate_test_tt2 import Generator  # noqa

Args = namedtuple(
    "GenratorArgs", ["scen_ids", "sipp_msg", "filter", "filter_common"]
)
IDS_FILE = "tests/fixtures/{}/scenario_ids.yml"
MSG_FILE = "tests/fixtures/{}/sipp_scenario{}.msg"
TT2_FILE = "tests/fixtures/{}/sipp_scenario{}_test.yml.tt2"


def check_filecontent(a, b):
    with open(a, "r") as fa, open(b, "r") as fb:
        lines_a = fa.readlines()
        lines_b = fb.readlines()
    diff = difflib.unified_diff(lines_a, lines_b, a, str(b))
    sys.stderr.write("diff:\n")
    sys.stderr.writelines(diff)
    return filecmp.cmp(a, b)


def test_load_msg():
    res = load_msg(MSG_FILE.format("auth_fail", "00"))

    for i in range(len(res)):
        print("res[{}][0]:{}".format(i, res[i][0]))

    assert len(res) == 5
    for i in range(4):
        assert res[i][0] == "SIP/2.0 401 Unauthorized\n"
        assert len(res[i]) == 11
    assert res[4][0] == "SIP/2.0 403 Try again later\n"
    assert len(res[4]) == 10
    for i in range(5):
        assert (
            res[i][2] == "From: <sip:testuser1003@"
            "auth-fail.scenarios.test>;tag=29092SIPpTag001\n"
        )


def test_get_header():
    hdr = Generator.get_header(
        "ViA: SIP/2.0/UDP 10.20.29.2:51602"
        ";rport=51602;branch=z9hG4bK-29092-1-6"
    )
    assert hdr == "via"
    assert Generator.get_header("not a header...no no via:") == None


def test_filter_hdr():
    msgs = load_msg(MSG_FILE.format("auth_fail", "00"))
    ids = load_yaml(IDS_FILE.format("auth_fail", "00"))
    g = Generator(Generator.common_hdrs, msgs, ids)
    assert g.filter_hdr(
        "ViA: SIP/2.0/UDP 10.20.29.2:51602;"
        "rport=51602;branch=z9hG4bK-29092-1-6"
    )
    assert g.filter_hdr("SIP/2.0 401 Unauthorized") == (False, None)
    assert g.filter_hdr("CSeq: 1 REGISTER") == (False, "cseq")


def test_process_msg():
    msgs = load_msg(MSG_FILE.format("auth_fail", "00"))
    ids = load_yaml(IDS_FILE.format("auth_fail", "00"))
    g = Generator(Generator.common_hdrs, msgs, ids)
    res = g.process_msg(msgs[0])
    assert len(res) == 7


def test_empty_args(generate_test_tt2):
    res = generate_test_tt2("--filter", "CSeq")
    assert res.returncode != 0


def test_hdrs_common():
    assert len(Generator.common_hdrs) == 5


def test_get_filters(generate_test_tt2):
    args = Args(None, None, ["CSeq", "WWW-Authenticate"], None)
    res = Generator.get_filters(args)

    assert res == set(
        [
            "CSeq",
            "WWW-Authenticate",
            "Via",
            "Route",
            "Call-ID",
            "Expires",
            "Max-Forwards",
        ]
    )
    assert Generator.common_hdrs == set(
        ["Via", "Route", "Call-ID", "Expires", "Max-Forwards"]
    )

    args = Args(None, None, None, None)
    res = Generator.get_filters(args)
    assert Generator.common_hdrs == set(
        ["Via", "Route", "Call-ID", "Expires", "Max-Forwards"]
    )


def test_ok_auth_fail(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("auth_fail"), MSG_FILE.format("auth_fail", "00")
    )

    assert check_filecontent(TT2_FILE.format("auth_fail", "00"), res.out_file)
    assert res.returncode == 0


def test_ok_incoming_foreign_dom(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_foreign_dom"),
        MSG_FILE.format("incoming_foreign_dom", "00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_foreign_dom", "00"), res.out_file
    )
    assert res.returncode == 0


def test_ok_incoming_foreign_dom_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_foreign_dom"),
        MSG_FILE.format("incoming_foreign_dom", "_responder00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_foreign_dom", "_responder00"), res.out_file
    )
    assert res.returncode == 0


def test_ok_invite_redirect_tel_uri(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("invite_redirect_tel_uri"),
        MSG_FILE.format("invite_redirect_tel_uri", "00"),
    )

    assert check_filecontent(
        TT2_FILE.format("invite_redirect_tel_uri", "00"), res.out_file
    )
    assert res.returncode == 0


def test_invite_redirect_tel_uri_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("invite_redirect_tel_uri"),
        MSG_FILE.format("invite_redirect_tel_uri", "_responder00"),
    )

    assert check_filecontent(
        TT2_FILE.format("invite_redirect_tel_uri", "_responder00"),
        res.out_file,
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("invite_redirect_tel_uri"),
        MSG_FILE.format("invite_redirect_tel_uri", "_responder01"),
    )

    assert check_filecontent(
        TT2_FILE.format("invite_redirect_tel_uri", "_responder01"),
        res.out_file,
    )
    assert res.returncode == 0


def test_ok_incoming_hih(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_hih"), MSG_FILE.format("incoming_hih", "00")
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_hih", "00"), res.out_file
    )
    assert res.returncode == 0


def test_incoming_hih_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_hih"),
        MSG_FILE.format("incoming_hih", "_responder01"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_hih", "_responder01"), res.out_file
    )
    assert res.returncode == 0


def test_mix(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("mix"), MSG_FILE.format("mix", "00")
    )

    assert check_filecontent(TT2_FILE.format("mix", "00"), res.out_file)
    assert res.returncode == 0


def test_mix_alias(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("mix"), MSG_FILE.format("mix", "01")
    )

    assert check_filecontent(TT2_FILE.format("mix", "01"), res.out_file)
    assert res.returncode == 0


def test_mix_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("mix"), MSG_FILE.format("mix", "_responder00")
    )

    assert check_filecontent(
        TT2_FILE.format("mix", "_responder00"), res.out_file
    )
    assert res.returncode == 0


def test_ok_invite_alias_devid(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    for i in range(0, 3):
        res = generate_test_tt2_file(
            IDS_FILE.format("invite_alias_devid"),
            MSG_FILE.format("invite_alias_devid", f"0{i}"),
        )

        assert check_filecontent(
            TT2_FILE.format("invite_alias_devid", f"0{i}"), res.out_file
        )
        assert res.returncode == 0


def test_invite_alias_devid_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("invite_alias_devid"),
        MSG_FILE.format("invite_alias_devid", "_responder02"),
    )

    assert check_filecontent(
        TT2_FILE.format("invite_alias_devid", "_responder02"), res.out_file
    )
    assert res.returncode == 0


def test_ok_incoming_peer(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_peer"),
        MSG_FILE.format("incoming_peer", "00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_peer", "00"), res.out_file
    )
    assert res.returncode == 0


def test_incoming_peer_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_peer"),
        MSG_FILE.format("incoming_peer", "_responder00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_peer", "_responder00"), res.out_file
    )
    assert res.returncode == 0


def test_ok_incoming_shared_line(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "00"), res.out_file
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "01"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "01"), res.out_file
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "02"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "02"), res.out_file
    )
    assert res.returncode == 0


def test_incoming_shared_line_resp(generate_test_tt2_file, caplog):
    caplog.set_level(logging.DEBUG)
    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "_responder00"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "_responder00"),
        res.out_file,
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "_responder01"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "_responder01"),
        res.out_file,
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "_responder02"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "_responder02"),
        res.out_file,
    )
    assert res.returncode == 0

    res = generate_test_tt2_file(
        IDS_FILE.format("incoming_shared_line"),
        MSG_FILE.format("incoming_shared_line", "_responder03"),
    )

    assert check_filecontent(
        TT2_FILE.format("incoming_shared_line", "_responder03"),
        res.out_file,
    )
    assert res.returncode == 0