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---
features:
  - |
    Allow to configure the Message Queue notification driver.
    By default, we'll configure 'messagingv2' but we can now
    override NotificationDriver parameter and set 'noop' when
    we don't want notifications, which is the case when
    we disable Telemetry services.
deprecations:
  - KeystoneNotificationDriver is deprecated in favor of NotificationDriver.
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# Copyright 2015-2016 Intel Corporation.
#
# 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.

"""Tools for access to OS details
"""

import os
import platform
import subprocess
import locale
import re

from conf import settings as S

def match_line(file_name, pattern):
    """ loops through given file and returns first line matching given pattern

    :returns: string with the matching line without end of line or None
    """
    try:
        with open(file_name, encoding="latin-1") as file_:
            for line in file_:
                if not line.strip():
                    continue
                if not line.strip().startswith(pattern):
                    continue

                return line.strip().rstrip('\n')
        return None
    except OSError:
        return None

def get_os():
    """Get distro name.

    :returns: Return distro name as a string
    """
    return ' '.join(platform.dist())

def get_kernel():
    """Get kernel version.

    :returns: Return kernel version as a string
    """
    return platform.release()

def get_cpu():
    """Get CPU information.

    :returns: Return CPU information as a string
    """
    cpu = match_line('/proc/cpuinfo', 'model name')
    return cpu.split(':')[1] if cpu else cpu

def get_nic():
    """Get NIC(s) information.

    :returns: Return NIC(s) information as a list
    """
    nics = []
    output = subprocess.check_output('lspci', shell=True)
    output = output.decode(locale.getdefaultlocale()[1])
    for line in output.split('\n'):
        for nic in S.getValue('NICS'):
            # lspci shows PCI addresses without domain part, i.e. last 7 chars
            if line.startswith(nic['pci'][-7:]):
                nics.append(''.join(line.split(':')[2:]).strip())
    return nics

def get_platform():
    """Get platform information.

    Currently this is the motherboard vendor, name and socket
    count.

    :returns: Return platform information as a string
    """
    output = []

    with open('/sys/class/dmi/id/board_vendor', 'r') as file_:
        output.append(file_.readline().rstrip())

    with open('/sys/class/dmi/id/board_name', 'r') as file_:
        output.append(file_.readline().rstrip())

    num_nodes = len([name for name in os.listdir(
        '/sys/devices/system/node/') if name.startswith('node')])
    output.append(''.join(['[', str(num_nodes), ' sockets]']))

    return ' '.join(output).strip()

def get_cpu_cores():
    """Get number of CPU cores.

    :returns: Return number of CPU cores
    """
    cores = 0
    with open('/proc/cpuinfo') as file_:
        for line in file_:
            if line.rstrip('\n').startswith('processor'):
                cores += 1
            continue

    # this code must be executed by at leat one core...
    if cores < 1:
        cores = 1
    return cores

def get_memory():
    """Get memory information.

    :returns: amount of system memory as string together with unit
    """
    memory = match_line('/proc/meminfo', 'MemTotal')
    return memory.split(':')[1].strip() if memory else memory

def get_memory_bytes():
    """Get memory information in bytes

    :returns: amount of system memory
    """
    mem_list = get_memory().split(' ')
    mem = float(mem_list[0].strip())
    if mem_list.__len__() > 1:
        unit = mem_list[1].strip().lower()
        if unit == 'kb':
            mem *= 1024
        elif unit == 'mb':
            mem *= 1024 ** 2
        elif unit == 'gb':
            mem *= 1024 ** 3
        elif unit == 'tb':
            mem *= 1024 ** 4

    return int(mem)

def get_pids(proc_names_list):
    """ Get pid(s) of process(es) with given name(s)

    :returns: list with pid(s) of given processes or None if processes
        with given names are not running
    """

    try:
        pids = subprocess.check_output(['sudo', 'LC_ALL=' + S.getValue('DEFAULT_CMD_LOCALE'), 'pidof']
                                       + proc_names_list)
    except subprocess.CalledProcessError:
        # such process isn't running
        return None

    return list(map(str, map(int, pids.split())))

def get_pid(proc_name_str):
    """ Get pid(s) of process with given name

    :returns: list with pid(s) of given process or None if process
        with given name is not running
    """
    return get_pids([proc_name_str])

def pid_isalive(pid):
    """ Checks if given PID is alive

    :param pid: PID of the process
    :returns: True if given process is running, False otherwise
    """
    return os.path.isdir('/proc/' + str(pid))

def get_bin_version(binary, regex):
    """ get version of given binary selected by given regex

    :returns: version string or None
    """
    try:
        output = subprocess.check_output(binary, shell=True).decode().rstrip('\n')
    except subprocess.CalledProcessError:
        return None

    versions = re.findall(regex, output)
    if len(versions):
        return versions[0]
    else:
        return None

def get_git_tag(path):
    """ get tag of recent commit from repository located at 'path'

    :returns: git tag in form of string with commit hash or None if there
        isn't any git repository at given path
    """
    try:
        if os.path.isdir(path):
            return subprocess.check_output('cd {}; git rev-parse HEAD'.format(path), shell=True,
                                           stderr=subprocess.DEVNULL).decode().rstrip('\n')
        elif os.path.isfile(path):
            return subprocess.check_output('cd $(dirname {}); git log -1 --pretty="%H" {}'.format(path, path),
                                           shell=True, stderr=subprocess.DEVNULL).decode().rstrip('\n')
        else:
            return None
    except subprocess.CalledProcessError:
        return None

# This function uses long switch per purpose, so let us suppress pylint warning too-many-branches
# pylint: disable=R0912
def get_version(app_name):
    """ Get version of given application and its git tag

    :returns: dictionary {'name' : app_name, 'version' : app_version, 'git_tag' : app_git_tag) in case that
        version or git tag are not known or not applicaple, than None is returned for any unknown value

    """
    app_version_file = {
        'ovs' : r'Open vSwitch\) ([0-9.]+)',
        'testpmd' : r'RTE Version: \'\S+ ([0-9.]+)',
        'qemu' : r'QEMU emulator version ([0-9.]+)',
        'loopback_l2fwd' : os.path.join(S.getValue('ROOT_DIR'), 'src/l2fwd/l2fwd.c'),
        'loopback_testpmd' : os.path.join(S.getValue('TOOLS')['dpdk_src'],
                                          'lib/librte_eal/common/include/rte_version.h'),
        'ixnet' : os.path.join(S.getValue('TRAFFICGEN_IXNET_LIB_PATH'), 'pkgIndex.tcl'),
    }



    app_version = None
    app_git_tag = None

    if app_name.lower().startswith('ovs'):
        app_version = get_bin_version('{} --version'.format(S.getValue('TOOLS')['ovs-vswitchd']),
                                      app_version_file['ovs'])
        if 'vswitch_src' in S.getValue('TOOLS'):
            app_git_tag = get_git_tag(S.getValue('TOOLS')['vswitch_src'])
    elif app_name.lower() in ['dpdk', 'testpmd']:
        app_version = get_bin_version('{} -v -h'.format(S.getValue('TOOLS')['testpmd']),
                                      app_version_file['testpmd'])
        # we have to consult PATHS settings to be sure, that dpdk/testpmd
        # were build from the sources
        if S.getValue('PATHS')[app_name.lower()]['type'] == 'src':
            app_git_tag = get_git_tag(S.getValue('TOOLS')['dpdk_src'])
    elif app_name.lower() == 'loopback_testpmd':
        # testpmd inside the guest is compiled from downloaded sources
        # stored at TOOS['dpdk_src'] directory
        tmp_ver = ['', '', '']
        dpdk_16 = False
        with open(app_version_file['loopback_testpmd']) as file_:
            for line in file_:
                if not line.strip():
                    continue
                # DPDK version < 16
                if line.startswith('#define RTE_VER_MAJOR'):
                    tmp_ver[0] = line.rstrip('\n').split(' ')[2]
                # DPDK version < 16
                elif line.startswith('#define RTE_VER_PATCH_LEVEL'):
                    tmp_ver[2] = line.rstrip('\n').split(' ')[2]
                # DPDK version < 16
                elif line.startswith('#define RTE_VER_PATCH_RELEASE'):
                    release = line.rstrip('\n').split(' ')[2]
                    if not '16' in release:
                        tmp_ver[2] += line.rstrip('\n').split(' ')[2]
                # DPDK all versions
                elif line.startswith('#define RTE_VER_MINOR'):
                    if dpdk_16:
                        tmp_ver[2] = line.rstrip('\n').split(' ')[2]
                    else:
                        tmp_ver[1] = line.rstrip('\n').split(' ')[2]
                # DPDK all versions
                elif line.startswith('#define RTE_VER_SUFFIX'):
                    tmp_ver[2] += line.rstrip('\n').split('"')[1]
                # DPDK version >= 16
                elif line.startswith('#define RTE_VER_YEAR'):
                    dpdk_16 = True
                    tmp_ver[0] = line.rstrip('\n').split(' ')[2]
                # DPDK version >= 16
                elif line.startswith('#define RTE_VER_MONTH'):
                    tmp_ver[1] = '{:0>2}'.format(line.rstrip('\n').split(' ')[2])
                # DPDK version >= 16
                elif line.startswith('#define RTE_VER_RELEASE'):
                    release = line.rstrip('\n').split(' ')[2]
                    if not '16' in release:
                        tmp_ver[2] += line.rstrip('\n').split(' ')[2]

        if len(tmp_ver[0]):
            app_version = '.'.join(tmp_ver)
        app_git_tag = get_git_tag(S.getValue('TOOLS')['dpdk_src'])
    elif app_name.lower().startswith('qemu'):
        app_version = get_bin_version('{} --version'.format(S.getValue('TOOLS')['qemu-system']),
                                      app_version_file['qemu'])
        if 'qemu_src' in S.getValue('TOOLS'):
            app_git_tag = get_git_tag(S.getValue('TOOLS')['qemu_src'])
    elif app_name.lower() == 'ixnet':
        app_version = match_line(app_version_file['ixnet'], 'package provide IxTclNetwork')
        if app_version:
            app_version = app_version.split(' ')[3]
    elif app_name.lower() == 'xena':
        try:
            app_version = S.getValue('XENA_VERSION')
        except AttributeError:
            # setting was not available after execution
            app_version = 'N/A'
    elif app_name.lower() == 'dummy':
        # get git tag of file with Dummy implementation
        app_git_tag = get_git_tag(os.path.join(S.getValue('ROOT_DIR'), 'tools/pkt_gen/dummy/dummy.py'))
    elif app_name.lower() == 'vswitchperf':
        app_git_tag = get_git_tag(S.getValue('ROOT_DIR'))
    elif app_name.lower() == 'l2fwd':
        app_version = match_line(app_version_file['loopback_l2fwd'], 'MODULE_VERSION')
        if app_version:
            app_version = app_version.split('"')[1]
        app_git_tag = get_git_tag(app_version_file['loopback_l2fwd'])
    elif app_name.lower() in ['linux_bridge', 'buildin']:
        # without login into running VM, it is not possible to check bridge_utils version
        app_version = 'NA'
        app_git_tag = 'NA'

    return {'name' : app_name, 'version' : app_version, 'git_tag' : app_git_tag}

def get_loopback_version(loopback_app_name):
    """ Get version of given guest loopback application and its git tag

    :returns: dictionary {'name' : app_name, 'version' : app_version, 'git_tag' : app_git_tag) in case that
        version or git tag are not known or not applicaple, than None is returned for any unknown value
    """
    version = get_version("loopback_{}".format(loopback_app_name))
    version['name'] = loopback_app_name
    return version