# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright (c) 2015-2016 Western Digital Corporation or its affiliates.
#
# 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 2
# of the License, or (at your option) any later version.
#
# This program 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA  02110-1301, USA.
#
#   Author: Chaitanya Kulkarni <chaitanya.kulkarni@hgst.com>
#
"""
NVMe Namespace Management Testcase:-

    1. Create Maximum number of Namespaces and validate.
    2. Attach all Namespaces to controller.
    3. Run IOs on Namespace under test.
    4. Detach Maximum number of Namespaces from controller.
    5. Delete all Namespaces.
"""

import time

from nvme_test import TestNVMe


class TestNVMeCreateMaxNS(TestNVMe):

    """
    Represents Attach, Detach namespace testcase.

        - Attributes:
              - dps : data protection information.
              - flbas : LBA format information.
              - nsze : namespace size.
              - ncap : namespace capacity.
              - ctrl_id : controller id.
    """

    def setUp(self):
        """ Pre Section for TestNVMeAttachDetachNSCmd """
        super().setUp()
        self.dps = 0
        self.flbas = 0
        self.nsze = int(self.get_ncap() /
                        self.get_format() / self.get_max_ns())
        # Make sure that we have enough capacity for each ns.
        # Creating a ns might allocate more bits (NVMCAP) than specified by
        # nsze and ncap.
        self.nsze = int(self.nsze / 2)
        self.ncap = self.nsze
        self.setup_log_dir(self.__class__.__name__)
        self.max_ns = self.get_max_ns()
        self.ctrl_id = self.get_ctrl_id()
        self.delete_all_ns()
        time.sleep(1)

    def tearDown(self):
        """
        Post Section for TestNVMeAttachDetachNSCmd

            - Create primary namespace.
            - Attach it to controller.
            - Call super class's destructor.
        """
        self.assertEqual(self.create_and_validate_ns(self.default_nsid,
                                                     self.nsze,
                                                     self.ncap,
                                                     self.flbas,
                                                     self.dps), 0)
        self.attach_ns(self.ctrl_id, self.default_nsid)
        super().tearDown()

    def test_attach_detach_ns(self):
        """ Testcase main """
        print(f"##### Testing max_ns: {self.max_ns}")
        for nsid in range(1, self.max_ns + 1):
            print("##### Creating " + str(nsid))
            err = self.create_and_validate_ns(nsid,
                                              self.nsze,
                                              self.ncap,
                                              self.flbas,
                                              self.dps)
            self.assertEqual(err, 0)
            print("##### Attaching " + str(nsid))
            self.assertEqual(self.attach_ns(self.ctrl_id, nsid), 0)
            print("##### Running IOs in " + str(nsid))
            self.run_ns_io(nsid, 9, 1)

        for nsid in range(1, self.max_ns + 1):
            print("##### Detaching " + str(nsid))
            self.assertEqual(self.detach_ns(self.ctrl_id, nsid), 0)
            print("#### Deleting " + str(nsid))
            self.assertEqual(self.delete_and_validate_ns(nsid), 0)
        self.nvme_reset_ctrl()
