#encoding = utf8
import logging

from action_handler.ppt import PPTController
from eventbus import EventBus

logger = logging.getLogger(__name__)


class PPTAction:
    def __init__(self):
        self.ppt_controller = None
        EventBus().register("ppt_open", self.open)
        EventBus().register("ppt_goto", self.goto)
        EventBus().register("ppt_next", self.goto)
        EventBus().register("ppt_pre", self.goto)

    def __del__(self):
        EventBus().unregister("ppt_open", self.open)
        EventBus().unregister("ppt_goto", self.goto)
        EventBus().unregister("ppt_next", self.goto)
        EventBus().unregister("ppt_pre", self.goto)
        del self.ppt_controller

    def open(self, *args, **kwargs):
        path = args[0]
        if path is None or len(path) == 0:
            logger.warning('path is empty')
            return
        if self.ppt_controller is not None:
            del self.ppt_controller

        self.ppt_controller = PPTController()
        self.ppt_controller.open(path)
        self.ppt_controller.full_screen()

    def goto(self, *args, **kwargs):
        page = args[0]
        if page is None or self.ppt_controller is None:
            logger.warning('page is none or ppt controller is none')
            return

        self.ppt_controller.goto_slide(page)

    def next(self, *args, **kwargs):
        if self.ppt_controller is None:
            logger.warning('page is none or ppt controller is none')
            return
        self.ppt_controller.next_page()

    def pre(self, *args, **kwargs):
        if self.ppt_controller is None:
            logger.warning('page is none or ppt controller is none')
            return
        self.ppt_controller.pre_page()