# coding: utf8

""" Progress bar """

import logging
import progressbar


log = logging.getLogger(__name__)

class Pbar(object):  # pylint: disable=useless-object-inheritance
    """
    Progress bar

    This class abstract a progress bar that could be enable/disable by
    configuration/script parameters.
    """

    __pbar = None
    __count = None

    def __init__(self, name, maxval, enabled=True):
        if enabled and maxval:
            self.__count = 0
            self.__pbar = progressbar.ProgressBar(
                widgets=[
                    name + ': ',
                    progressbar.Percentage(),
                    ' ',
                    progressbar.Bar(),
                    ' ',
                    progressbar.SimpleProgress(),
                    progressbar.ETA()
                ],
                maxval=maxval
            ).start()
        else:
            log.info(name)

    def increment(self, step=None):
        """
        Increment the progress bar

        :param step:  The step (optional, default: 1)
        """
        if self.__pbar:
            self.__count += step if step else 1
            self.__pbar.update(self.__count)

    def finish(self):
        """ Finish the progress bar """
        if self.__pbar:
            self.__pbar.finish()