"""get volume level

Parameters:
    * amixer.device: Device to use, defaults to "Master,0"
"""
import re

import core.module
import core.widget

import util.cli

class Module(core.module.Module):
    def __init__(self, config, theme):
        super().__init__(config, theme, core.widget.Widget(self.volume))

        self.__level = 'n/a'
        self.__muted = True
        device = self.parameter('device', 'Master,0')
        self._cmdString = 'amixer get {}'.format(device)

    def volume(self, widget):
        if self.__level == 'n/a':
            return self.__level
        m = re.search(r'([\d]+)\%', self.__level)
        self.__muted = True
        if m:
            if m.group(1) != '0' and '[on]' in self.__level:
                self.__muted = False
            return '{}%'.format(m.group(1))
        else:
            return '0%'

    def update(self):
        try:
            self.__level = util.cli.execute('amixer get {}'.format(self.parameter('device', 'Master,0')))
        except Exception as e:
            self.__level = 'n/a'

    def state(self, widget):
        if self.__muted:
            return ['warning', 'muted']
        return ['unmuted']

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