"""
Pomodoro countdown on i3bar originally written by @Fandekasp (Adrien Lemaire)
"""
from subprocess import call
from time import time

MAX_BREAKS = 4
POSITION = 0
TIMER_POMODORO = 25 * 60
TIMER_BREAK = 5 * 60
TIMER_LONG_BREAK = 15 * 60


class Py3status:
    """
    """
    def __init__(self):
        self.__setup('stop')
        self.alert = False
        self.run = False

    def on_click(self, json, i3status_config, event):
        """
        Handles click events
        """
        if event['button'] == 1:
            if self.status == 'stop':
                self.status = 'start'
            self.run = True

        elif event['button'] == 2:
            self.__setup('stop')
            self.run = False

        elif event['button'] == 3:
            self.__setup('pause')
            self.run = False

    @property
    def response(self):
        """
        Return the response full_text string
        """
        return {
            'full_text': '{} ({})'.format(self.prefix, self.timer),
            'name': 'pomodoro'
        }

    def __setup(self, status):
        """
        Setup a step
        """
        self.status = status
        if status == 'stop':
            self.prefix = 'Pomodoro'
            self.status = 'stop'
            self.timer = TIMER_POMODORO
            self.breaks = 1

        elif status == 'start':
            self.prefix = 'Pomodoro'
            self.timer = TIMER_POMODORO

        elif status == 'pause':
            self.prefix = 'Break #%d' % self.breaks
            if self.breaks > MAX_BREAKS:
                self.timer = TIMER_LONG_BREAK
                self.breaks = 1
            else:
                self.breaks += 1
                self.timer = TIMER_BREAK

    def __decrement(self):
        """
        Countdown handler
        """
        self.timer -= 1
        if self.timer < 0:
            self.alert = True
            self.run = False
            self.__i3_nagbar()
            if self.status == 'start':
                self.__setup('pause')
                self.status = 'pause'
            elif self.status == 'pause':
                self.__setup('start')
                self.status = 'start'

    def __i3_nagbar(self, level='warning'):
        """
        Make use of i3-nagbar to display warnings to the user.
        """
        msg = '{} time is up !'.format(self.prefix)
        try:
            call(
                ['i3-nagbar', '-m', msg, '-t', level],
                stdout=open('/dev/null', 'w'),
                stderr=open('/dev/null', 'w')
            )
        except:
            pass

    def pomodoro(self, json, i3status_config):
        """
        Pomodoro response handling and countdown
        """
        if self.run:
            self.__decrement()

        response = self.response
        if self.alert:
            response['urgent'] = True
            self.alert = False

        if self.status == 'start':
            response['color'] = i3status_config['color_good']
        elif self.status == 'pause':
            response['color'] = i3status_config['color_degraded']
        else:
            response['color'] = i3status_config['color_bad']

        response['cached_until'] = time()
        return (POSITION, response)