# -*- coding: utf-8 eval: (blacken-mode 1) -*-
# SPDX-License-Identifier: ISC
#
# May 2 2023, Christian Hopps <chopps@labn.net>
#
# Copyright (c) 2023, LabN Consulting, L.L.C.
#

"""
Verify large set of routes present when staticd (backend client) is started after it's
startup config is present during launch.
"""

import logging
import os

import pytest
from lib.common_config import step
from lib.topogen import Topogen, TopoRouter
from munet.base import Timeout
from util import check_kernel, check_vtysh_up, write_big_route_conf

CWD = os.path.dirname(os.path.realpath(__file__))

pytestmark = [pytest.mark.staticd, pytest.mark.mgmtd]

track = Timeout(0)
ROUTE_COUNT = 2500
ROUTE_RANGE = [None, None]


@pytest.fixture(scope="module")
def tgen(request):
    "Setup/Teardown the environment and provide tgen argument to tests"

    global start_time
    topodef = {
        "s1": ("r1",),
    }

    tgen = Topogen(topodef, request.module.__name__)
    tgen.start_topology()

    prologue = open(f"{CWD}/r1/mgmtd.conf").read()

    confpath = f"{tgen.gears['r1'].gearlogdir}/r1-late-big.conf"
    start, end = write_big_route_conf("10.0.0.0/8", ROUTE_COUNT, confpath, prologue)
    ROUTE_RANGE[0] = start
    ROUTE_RANGE[1] = end

    # configure mgmtd using current mgmtd config file
    tgen.gears["r1"].load_config(TopoRouter.RD_ZEBRA, "zebra.conf")
    tgen.gears["r1"].load_config(TopoRouter.RD_MGMTD, confpath)

    # Explicit disable staticd now..
    tgen.gears["r1"].net.daemons["staticd"] = 0

    tgen.start_router()
    yield tgen
    tgen.stop_topology()


def test_staticd_latestart(tgen):
    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    r1 = tgen.routers()["r1"]

    check_vtysh_up(r1)
    logging.info("r1: vtysh connected after %ss", track.elapsed())

    result = check_kernel(r1, ROUTE_RANGE[0], retry_timeout=60, expected=False)
    assert result is not None, "first route present and should not be"
    result = check_kernel(r1, ROUTE_RANGE[1], retry_timeout=60, expected=False)
    assert result is not None, "last route present and should not be"

    step("Starting staticd")
    t2 = Timeout(0)
    r1.startDaemons(["staticd"])

    result = check_kernel(r1, ROUTE_RANGE[0], retry_timeout=60)
    assert result is None, "first route not present and should be"
    logging.info("r1: elapsed time for first route %ss", t2.elapsed())

    count = 0
    ocount = 0
    while count < ROUTE_COUNT:
        rc, o, e = r1.net.cmd_status("ip -o route | wc -l")
        if not rc:
            if count > ocount + 100:
                ocount = count
                logging.info("r1: elapsed time for %d routes %s", count, t2.elapsed())
            count = int(o)

    result = check_kernel(r1, ROUTE_RANGE[1], retry_timeout=1200)
    assert result is None, "last route not present and should be"
    logging.info("r1: elapsed time for last route %ss", t2.elapsed())