# pylint: disable=C0111,R0903

"""Displays the unread GitHub notifications for a GitHub user

Requires the following library:
    * requests

Parameters:
    * github.token: GitHub user access token, the token needs to have the 'notifications' scope.
                    The value of the token can also be set using a 'GITHUB_TOKEN' environment variable.
    * github.interval: Interval in minutes
"""

import os
import time
import functools
import bumblebee.input
import bumblebee.output
import bumblebee.engine

try:
    import requests
except ImportError:
    pass

class Module(bumblebee.engine.Module):
    def __init__(self, engine, config):
        super(Module, self).__init__(engine, config,
                                     bumblebee.output.Widget(full_text=self.github)
                                    )
        self._count = 0
        self._interval = int(self.parameter("interval", "5"))
        self._nextcheck = 0
        engine.input.register_callback(self, button=bumblebee.input.LEFT_MOUSE,
            cmd="x-www-browser https://github.com/notifications")
        immediate_update = functools.partial(self.update, immediate=True)
        engine.input.register_callback(self, button=bumblebee.input.RIGHT_MOUSE,
            cmd=immediate_update)

    def github(self, _):
        return str(self._count)

    def update(self, _, immediate=False):
        if immediate or self._nextcheck < int(time.time()):
            self._nextcheck = int(time.time()) + self._interval * 60
            token = self.parameter("token", os.environ.get("GITHUB_TOKEN"))

            if not token:
                self._count = "n/a"
                return
              
            try:
                notifications = requests.get("https://api.github.com/notifications", headers={"Authorization":"token {}".format(token)}).json()
                self._count = len(filter(lambda notification: notification.get("unread", False), notifications))
            except Exception:
                self._count = "n/a"


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