# Copyright 2012 Vincent Jacques
# vincent@vincent-jacques.net

# This file is part of PyGithub. http://vincent-jacques.net/PyGithub

# PyGithub is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

# PyGithub is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License along with PyGithub.  If not, see <http://www.gnu.org/licenses/>.

import datetime

import GithubException


class _NotSetType:
    pass
NotSet = _NotSetType()


class BasicGithubObject(object):
    def __init__(self, requester, attributes, completed):  # 'completed' may be removed if I find a way
        self._requester = requester
        self._initAttributes()
        self._useAttributes(attributes)

    @staticmethod
    def _parentUrl(url):
        return "/".join(url.split("/")[: -1])

    @staticmethod
    def _NoneIfNotSet(value):
        if value is NotSet:
            return None
        else:
            return value

    @staticmethod
    def _parseDatetime(s):
        if s is None:
            return None
        elif len(s) == 24:
            return datetime.datetime.strptime(s, "%Y-%m-%dT%H:%M:%S.000Z")
        elif len(s) == 25:
            return datetime.datetime.strptime(s[:19], "%Y-%m-%dT%H:%M:%S") + (1 if s[19] == '-' else -1) * datetime.timedelta(hours=int(s[20:22]), minutes=int(s[23:25]))
        else:
            return datetime.datetime.strptime(s, "%Y-%m-%dT%H:%M:%SZ")


class GithubObject(BasicGithubObject):
    def __init__(self, requester, attributes, completed):
        BasicGithubObject.__init__(self, requester, attributes, completed)
        self.__completed = completed

    def _completeIfNotSet(self, value):
        if not self.__completed and value is NotSet:
            self.__complete()

    def __complete(self):
        headers, data = self._requester.requestAndCheck(
            "GET",
            self._url,
            None,
            None
        )
        self._useAttributes(data)
        self._completed = True
