# This file is part of Ansible
#
# Ansible 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 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import re

from ansible.module_utils._text import to_text


def get_sysctl(module, prefixes):
    sysctl_cmd = module.get_bin_path('sysctl')
    cmd = [sysctl_cmd]
    cmd.extend(prefixes)

    sysctl = dict()

    try:
        rc, out, err = module.run_command(cmd)
    except (IOError, OSError) as e:
        module.warn('Unable to read sysctl: %s' % to_text(e))
        rc = 1

    if rc == 0:
        key = ''
        value = ''
        for line in out.splitlines():
            if not line.strip():
                continue

            if line.startswith(' '):
                # handle multiline values, they will not have a starting key
                # Add the newline back in so people can split on it to parse
                # lines if they need to.
                value += '\n' + line
                continue

            if key:
                sysctl[key] = value.strip()

            try:
                (key, value) = re.split(r'\s?=\s?|: ', line, maxsplit=1)
            except Exception as e:
                module.warn('Unable to split sysctl line (%s): %s' % (to_text(line), to_text(e)))

        if key:
            sysctl[key] = value.strip()

    return sysctl
