# -*- coding: utf-8 -*-
'''
Module for apcupsd
'''
from __future__ import absolute_import, print_function, unicode_literals

# Import Python libs
import logging

# Import Salt libs
import salt.utils.path
import salt.utils.decorators as decorators

log = logging.getLogger(__name__)

# Define the module's virtual name
__virtualname__ = 'apcups'


@decorators.memoize
def _check_apcaccess():
    '''
    Looks to see if apcaccess is present on the system
    '''
    return salt.utils.path.which('apcaccess')


def __virtual__():
    '''
    Provides apcupsd only if apcaccess is present
    '''
    if _check_apcaccess():
        return __virtualname__
    return (
        False,
        '{0} module can only be loaded on when apcupsd is installed'.format(
            __virtualname__
        )
    )


def status():
    '''
    Return apcaccess output

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status
    '''
    ret = {}
    apcaccess = _check_apcaccess()
    res = __salt__['cmd.run_all'](apcaccess)
    retcode = res['retcode']
    if retcode != 0:
        ret['Error'] = 'Something with wrong executing apcaccess, is apcupsd running?'
        return ret

    for line in res['stdout'].splitlines():
        line = line.split(':')
        ret[line[0].strip()] = line[1].strip()

    return ret


def status_load():
    '''
    Return load

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status_load
    '''
    data = status()
    if 'LOADPCT' in data:
        load = data['LOADPCT'].split()
        if load[1].lower() == 'percent':
            return float(load[0])

    return {'Error': 'Load not available.'}


def status_charge():
    '''
    Return battery charge

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status_charge
    '''
    data = status()
    if 'BCHARGE' in data:
        charge = data['BCHARGE'].split()
        if charge[1].lower() == 'percent':
            return float(charge[0])

    return {'Error': 'Load not available.'}


def status_battery():
    '''
    Return true if running on battery power

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status_battery
    '''
    data = status()
    if 'TONBATT' in data:
        return not data['TONBATT'] == '0 Seconds'

    return {'Error': 'Battery status not available.'}


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