# 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 GithubObject

import GitObject

class GitRef( GithubObject.GithubObject ):
    @property
    def object( self ):
        self._completeIfNotSet( self._object )
        return self._NoneIfNotSet( self._object )

    @property
    def ref( self ):
        self._completeIfNotSet( self._ref )
        return self._NoneIfNotSet( self._ref )

    @property
    def url( self ):
        self._completeIfNotSet( self._url )
        return self._NoneIfNotSet( self._url )

    def delete( self ):
        headers, data = self._requester.requestAndCheck(
            "DELETE",
            self.url,
            None,
            None
        )

    def edit( self, sha, force = GithubObject.NotSet ):
        assert isinstance( sha, ( str, unicode ) ), sha
        assert force is GithubObject.NotSet or isinstance( force, bool ), force
        post_parameters = {
            "sha": sha,
        }
        if force is not GithubObject.NotSet:
            post_parameters[ "force" ] = force
        headers, data = self._requester.requestAndCheck(
            "PATCH",
            self.url,
            None,
            post_parameters
        )
        self._useAttributes( data )

    def _initAttributes( self ):
        self._object = GithubObject.NotSet
        self._ref = GithubObject.NotSet
        self._url = GithubObject.NotSet

    def _useAttributes( self, attributes ):
        if "object" in attributes: # pragma no branch
            assert attributes[ "object" ] is None or isinstance( attributes[ "object" ], dict ), attributes[ "object" ]
            self._object = None if attributes[ "object" ] is None else GitObject.GitObject( self._requester, attributes[ "object" ], completed = False )
        if "ref" in attributes: # pragma no branch
            assert attributes[ "ref" ] is None or isinstance( attributes[ "ref" ], ( str, unicode ) ), attributes[ "ref" ]
            self._ref = attributes[ "ref" ]
        if "url" in attributes: # pragma no branch
            assert attributes[ "url" ] is None or isinstance( attributes[ "url" ], ( str, unicode ) ), attributes[ "url" ]
            self._url = attributes[ "url" ]