# -*- coding: UTF-8 -*-
#
# Copyright 2010-2014 The pygit2 contributors
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2,
# as published by the Free Software Foundation.
#
# In addition to the permissions in the GNU General Public License,
# the authors give you unlimited permission to link the compiled
# version of this file into combinations with other programs,
# and to distribute those combinations without any restriction
# coming from the use of this file.  (The General Public License
# restrictions do apply in other respects; for example, they cover
# modification of the file, and distribution when not linked into
# a combined executable.)
#
# This file 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING.  If not, write to
# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.

"""Tests for reference objects."""

from __future__ import absolute_import
from __future__ import unicode_literals
import unittest

from pygit2 import GitError, GIT_REF_OID, GIT_REF_SYMBOLIC
from . import utils


LAST_COMMIT = '2be5719152d4f82c7302b1c0932d8e5f0a4a0e98'



class ReferencesTest(utils.RepoTestCase):

    def test_list_all_references(self):
        repo = self.repo

        # Without argument
        self.assertEqual(sorted(repo.listall_references()),
                         ['refs/heads/i18n', 'refs/heads/master'])

        # We add a symbolic reference
        repo.create_reference('refs/tags/version1', 'refs/heads/master')
        self.assertEqual(sorted(repo.listall_references()),
                         ['refs/heads/i18n', 'refs/heads/master',
                          'refs/tags/version1'])

    def test_head(self):
        head = self.repo.head
        self.assertEqual(LAST_COMMIT, self.repo[head.target].hex)

    def test_lookup_reference(self):
        repo = self.repo

        # Raise KeyError ?
        self.assertRaises(KeyError, repo.lookup_reference, 'refs/foo')

        # Test a lookup
        reference = repo.lookup_reference('refs/heads/master')
        self.assertEqual(reference.name, 'refs/heads/master')


    def test_reference_get_sha(self):
        reference = self.repo.lookup_reference('refs/heads/master')
        self.assertEqual(reference.target.hex, LAST_COMMIT)


    def test_reference_set_sha(self):
        NEW_COMMIT = '5ebeeebb320790caf276b9fc8b24546d63316533'
        reference = self.repo.lookup_reference('refs/heads/master')
        reference.target = NEW_COMMIT
        self.assertEqual(reference.target.hex, NEW_COMMIT)

    def test_reference_set_sha_prefix(self):
        NEW_COMMIT = '5ebeeebb320790caf276b9fc8b24546d63316533'
        reference = self.repo.lookup_reference('refs/heads/master')
        reference.target = NEW_COMMIT[0:6]
        self.assertEqual(reference.target.hex, NEW_COMMIT)


    def test_reference_get_type(self):
        reference = self.repo.lookup_reference('refs/heads/master')
        self.assertEqual(reference.type, GIT_REF_OID)


    def test_get_target(self):
        reference = self.repo.lookup_reference('HEAD')
        self.assertEqual(reference.target, 'refs/heads/master')


    def test_set_target(self):
        reference = self.repo.lookup_reference('HEAD')
        self.assertEqual(reference.target, 'refs/heads/master')
        reference.target = 'refs/heads/i18n'
        self.assertEqual(reference.target, 'refs/heads/i18n')

    def test_get_shorthand(self):
        reference = self.repo.lookup_reference('refs/heads/master')
        self.assertEqual(reference.shorthand, 'master')
        reference = self.repo.create_reference('refs/remotes/origin/master', LAST_COMMIT)
        self.assertEqual(reference.shorthand, 'origin/master')

    def test_delete(self):
        repo = self.repo

        # We add a tag as a new reference that points to "origin/master"
        reference = repo.create_reference('refs/tags/version1', LAST_COMMIT)
        self.assertTrue('refs/tags/version1' in repo.listall_references())

        # And we delete it
        reference.delete()
        self.assertFalse('refs/tags/version1' in repo.listall_references())

        # Access the deleted reference
        self.assertRaises(GitError, getattr, reference, 'name')
        self.assertRaises(GitError, getattr, reference, 'type')
        self.assertRaises(GitError, getattr, reference, 'target')
        self.assertRaises(GitError, setattr, reference, 'target', LAST_COMMIT)
        self.assertRaises(GitError, setattr, reference, 'target', "a/b/c")
        self.assertRaises(GitError, reference.delete)
        self.assertRaises(GitError, reference.resolve)
        self.assertRaises(GitError, reference.rename, "refs/tags/version2")


    def test_rename(self):
        # We add a tag as a new reference that points to "origin/master"
        reference = self.repo.create_reference('refs/tags/version1',
                                               LAST_COMMIT)
        self.assertEqual(reference.name, 'refs/tags/version1')
        reference.rename('refs/tags/version2')
        self.assertEqual(reference.name, 'refs/tags/version2')


#   def test_reload(self):
#       name = 'refs/tags/version1'

#       repo = self.repo
#       ref = repo.create_reference(name, "refs/heads/master", symbolic=True)
#       ref2 = repo.lookup_reference(name)
#       ref.delete()
#       self.assertEqual(ref2.name, name)
#       self.assertRaises(KeyError, ref2.reload)
#       self.assertRaises(GitError, getattr, ref2, 'name')


    def test_reference_resolve(self):
        reference = self.repo.lookup_reference('HEAD')
        self.assertEqual(reference.type, GIT_REF_SYMBOLIC)
        reference = reference.resolve()
        self.assertEqual(reference.type, GIT_REF_OID)
        self.assertEqual(reference.target.hex, LAST_COMMIT)


    def test_reference_resolve_identity(self):
        head = self.repo.lookup_reference('HEAD')
        ref = head.resolve()
        self.assertTrue(ref.resolve() is ref)


    def test_create_reference(self):
        # We add a tag as a new reference that points to "origin/master"
        reference = self.repo.create_reference('refs/tags/version1',
                                               LAST_COMMIT)
        refs = self.repo.listall_references()
        self.assertTrue('refs/tags/version1' in refs)
        reference = self.repo.lookup_reference('refs/tags/version1')
        self.assertEqual(reference.target.hex, LAST_COMMIT)

        # try to create existing reference
        self.assertRaises(ValueError, self.repo.create_reference,
                          'refs/tags/version1', LAST_COMMIT)

        # try to create existing reference with force
        reference = self.repo.create_reference('refs/tags/version1',
                                               LAST_COMMIT, force=True)
        self.assertEqual(reference.target.hex, LAST_COMMIT)


    def test_create_symbolic_reference(self):
        repo = self.repo
        # We add a tag as a new symbolic reference that always points to
        # "refs/heads/master"
        reference = repo.create_reference('refs/tags/beta',
                                          'refs/heads/master')
        self.assertEqual(reference.type, GIT_REF_SYMBOLIC)
        self.assertEqual(reference.target, 'refs/heads/master')


        # try to create existing symbolic reference
        self.assertRaises(ValueError, repo.create_reference,
                          'refs/tags/beta', 'refs/heads/master')

        # try to create existing symbolic reference with force
        reference = repo.create_reference('refs/tags/beta',
                                          'refs/heads/master', force=True)
        self.assertEqual(reference.type, GIT_REF_SYMBOLIC)
        self.assertEqual(reference.target, 'refs/heads/master')


#   def test_packall_references(self):
#       self.repo.packall_references()


    def test_get_object(self):
        repo = self.repo
        ref = repo.lookup_reference('refs/heads/master')
        self.assertEqual(repo[ref.target].id, ref.get_object().id)


if __name__ == '__main__':
    unittest.main()
