# pylint: disable=C0111,R0903

"""Displays the number of todo items from a text file

Parameters:
    * todo.file: File to read TODOs from (defaults to ~/Documents/todo.txt)
"""

import os.path

import core.module
import core.widget
import core.input

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

        self.__doc = os.path.expanduser(self.parameter('file', '~/Documents/todo.txt'))
        self.__todos = self.count_items()
        core.input.register(self, button=core.input.LEFT_MOUSE, cmd='xdg-open {}'.format(self.__doc))

    def output(self, widget):
       return str(self.__todos)

    def update(self):
       self.__todos = self.count_items()

    def state(self, widgets):
        if self.__todos == 0:
            return 'empty'
        return 'items'

    def count_items(self):
        try:
            i = -1
            with open(self.__doc) as f:
                for i, l in enumerate(f):
                    pass
            return i+1
        except Exception:
            return 0

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