#!/usr/bin/env python3
#
# Copyright (C) 2016-2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.

import json

from jinja2 import Template
from sys import exit
from vyos.util import popen, DEVNULL

OUT_TMPL_SRC = """
{%- if cpu -%}
{% if 'vendor' in cpu %}CPU Vendor:       {{cpu.vendor}}{% endif %}
{% if 'model' in cpu %}Model:            {{cpu.model}}{% endif %}
{% if 'cpus' in cpu %}Total CPUs:       {{cpu.cpus}}{% endif %}
{% if 'sockets' in cpu %}Sockets:          {{cpu.sockets}}{% endif %}
{% if 'cores' in cpu %}Cores:            {{cpu.cores}}{% endif %}
{% if 'threads' in cpu %}Threads:          {{cpu.threads}}{% endif %}
{% if 'mhz' in cpu %}Current MHz:      {{cpu.mhz}}{% endif %}
{% if 'mhz_min' in cpu %}Minimum MHz:      {{cpu.mhz_min}}{% endif %}
{% if 'mhz_max' in cpu %}Maximum MHz:      {{cpu.mhz_max}}{% endif %}
{%- endif -%}
"""

def get_raw_data():
    cpu = {}
    cpu_json, code = popen('lscpu -J', stderr=DEVNULL)

    if code == 0:
        cpu_info = json.loads(cpu_json)
        if len(cpu_info) > 0 and 'lscpu' in cpu_info:
            for prop in cpu_info['lscpu']:
                if (prop['field'].find('Thread(s)') > -1): cpu['threads'] = prop['data']
                if (prop['field'].find('Core(s)')) > -1: cpu['cores'] = prop['data']
                if (prop['field'].find('Socket(s)')) > -1: cpu['sockets'] = prop['data']
                if (prop['field'].find('CPU(s):')) > -1: cpu['cpus'] = prop['data']
                if (prop['field'].find('CPU MHz')) > -1: cpu['mhz'] = prop['data']
                if (prop['field'].find('CPU min MHz')) > -1: cpu['mhz_min'] = prop['data']
                if (prop['field'].find('CPU max MHz')) > -1: cpu['mhz_max'] = prop['data']
                if (prop['field'].find('Vendor ID')) > -1: cpu['vendor'] = prop['data']
                if (prop['field'].find('Model name')) > -1: cpu['model'] = prop['data']

    return cpu

def get_formatted_output():
    cpu = get_raw_data()

    tmp = {'cpu':cpu}
    tmpl = Template(OUT_TMPL_SRC)
    return tmpl.render(tmp)

if __name__ == '__main__':
    cpu = get_raw_data()

    if len(cpu) > 0:
        print(get_formatted_output())
    else:
        print('CPU information could not be determined\n')
        exit(1)