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from .icon_tool_button import IconToolButton


class BatteryDashWidget(IconToolButton):
    """
    A Widget which displays incremental battery state, including a status tip.
    To use this widget simply call :func:`update_perc` and :func:`update_time` to change the displayed charge percentage and time remaining, respectively.

    :param name: The name of this widget
    :type name: str
    """
    def __init__(self, name='Battery', icons=None, charge_icons=None, icon_paths=None):
        if icons == None:
            icons = []
            charge_icons = []
            for x in range(6):
                icons.append(['ic-battery-%s.svg' % (x * 20)])
                charge_icons.append(['ic-battery-charge-%s.svg' % (x * 20)])
        super(BatteryDashWidget, self).__init__(name, icons, charge_icons, icon_paths=icon_paths)
        self.setEnabled(False)

        self._charge_icons = self._clicked_icons
        self.setStyleSheet('QToolButton:disabled {}')

        self._charging = False

        self.update_perc(0)

    def set_charging(self, value):
        self._charging = value

    def update_perc(self, val):
        """Update the displayed battery percentage.
        The default implementation of this method displays in 20% increments

        :param val: The new value to be displayed.
        :type val: int
        """
        self.update_state(round(val / 20.0))

    def _update_state(self, state):
        if self._charging:
            self.setIcon(self._charge_icons[state])
        else:
            self.setIcon(self._icons[state])

    def update_time(self, value):
        self.setToolTip("%s%% remaining" % value)
