#
# Copyright(c) 2020-2021 Intel Corporation
# SPDX-License-Identifier: BSD-3-Clause-Clear
#

import pytest

from api.cas import casadm, cli, cli_messages
from core.test_run import TestRun
from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
from test_utils.size import Size, Unit


@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
def test_remove_multilevel_core():
    """
        title: Test of the ability to remove a core used in a multilevel cache.
        description: |
          Negative test if OpenCAS does not allow to remove a core when the related exported object
          is used as a core device for another cache instance.
        pass_criteria:
          - No system crash.
          - OpenCAS does not allow removing a core used in a multilevel cache instance.
    """
    with TestRun.step("Prepare two devices for cache and one for core."):
        cache_dev = TestRun.disks['cache']
        cache_dev.create_partitions([Size(512, Unit.MebiByte)] * 2)
        cache_part1 = cache_dev.partitions[0]
        cache_part2 = cache_dev.partitions[1]
        core_dev = TestRun.disks['core']
        core_dev.create_partitions([Size(1, Unit.GibiByte)])
        core_dev = core_dev.partitions[0]

    with TestRun.step("Start the first cache instance"):
        cache1 = casadm.start_cache(cache_part1, force=True)

    with TestRun.step("Add a core device to the first cache instance."):
        core1 = cache1.add_core(core_dev)

    with TestRun.step("Start the second cache instance"):
        cache2 = casadm.start_cache(cache_part2, force=True)

    with TestRun.step("Add the first cache's exported object as a core "
                      "to the second cache instance."):
        cache2.add_core(core1)

    with TestRun.step("Try to remove core from the first level cache."):
        output = TestRun.executor.run_expect_fail(cli.remove_core_cmd(cache_id=str(cache1.cache_id),
                                                                      core_id=str(core1.core_id),
                                                                      force=True))
        cli_messages.check_stderr_msg(output, cli_messages.remove_multilevel_core)

    with TestRun.step("Stop cache."):
        casadm.stop_all_caches()