# test_swift.py -- Unittests for the Swift backend.
# Copyright (C) 2013 eNovance SAS <licensing@enovance.com>
#
# Author: Fabien Boucher <fabien.boucher@enovance.com>
#
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as public by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#

"""Tests for dulwich.contrib.swift."""

import posixpath

from time import time
from io import BytesIO
try:
    from StringIO import StringIO
except ImportError:
    from io import StringIO

import sys
from unittest import skipIf

from dulwich.tests import (
    TestCase,
    )
from dulwich.tests.test_object_store import (
    ObjectStoreTests,
    )
from dulwich.tests.utils import (
    build_pack,
    )
from dulwich.objects import (
    Blob,
    Commit,
    Tree,
    Tag,
    parse_timezone,
    )
from dulwich.pack import (
    REF_DELTA,
    write_pack_index_v2,
    PackData,
    load_pack_index_file,
    )

try:
    from simplejson import dumps as json_dumps
except ImportError:
    from json import dumps as json_dumps

missing_libs = []

try:
    import gevent  # noqa:F401
except ImportError:
    missing_libs.append("gevent")

try:
    import geventhttpclient  # noqa:F401
except ImportError:
    missing_libs.append("geventhttpclient")

try:
    from mock import patch
except ImportError:
    missing_libs.append("mock")

skipmsg = "Required libraries are not installed (%r)" % missing_libs

skipIfPY3 = skipIf(sys.version_info[0] == 3,
                   "SWIFT module not yet ported to python3.")

if not missing_libs:
    from dulwich.contrib import swift

config_file = """[swift]
auth_url = http://127.0.0.1:8080/auth/%(version_str)s
auth_ver = %(version_int)s
username = test;tester
password = testing
region_name = %(region_name)s
endpoint_type = %(endpoint_type)s
concurrency = %(concurrency)s
chunk_length = %(chunk_length)s
cache_length = %(cache_length)s
http_pool_length = %(http_pool_length)s
http_timeout = %(http_timeout)s
"""

def_config_file = {'version_str': 'v1.0',
                   'version_int': 1,
                   'concurrency': 1,
                   'chunk_length': 12228,
                   'cache_length': 1,
                   'region_name': 'test',
                   'endpoint_type': 'internalURL',
                   'http_pool_length': 1,
                   'http_timeout': 1}


def create_swift_connector(store={}):
    return lambda root, conf: FakeSwiftConnector(root,
                                                 conf=conf,
                                                 store=store)


class Response(object):

    def __init__(self, headers={}, status=200, content=None):
        self.headers = headers
        self.status_code = status
        self.content = content

    def __getitem__(self, key):
        return self.headers[key]

    def items(self):
        return self.headers.items()

    def read(self):
        return self.content


def fake_auth_request_v1(*args, **kwargs):
    ret = Response({'X-Storage-Url':
                    'http://127.0.0.1:8080/v1.0/AUTH_fakeuser',
                    'X-Auth-Token': '12' * 10},
                   200)
    return ret


def fake_auth_request_v1_error(*args, **kwargs):
    ret = Response({},
                   401)
    return ret


def fake_auth_request_v2(*args, **kwargs):
    s_url = 'http://127.0.0.1:8080/v1.0/AUTH_fakeuser'
    resp = {'access': {'token': {'id': '12' * 10},
                       'serviceCatalog':
                       [
                           {'type': 'object-store',
                            'endpoints': [{'region': 'test',
                                          'internalURL': s_url,
                                           },
                                          ]
                            },
                       ]
                       }
            }
    ret = Response(status=200, content=json_dumps(resp))
    return ret


def create_commit(data, marker=b'Default', blob=None):
    if not blob:
        blob = Blob.from_string(b'The blob content ' + marker)
    tree = Tree()
    tree.add(b"thefile_" + marker, 0o100644, blob.id)
    cmt = Commit()
    if data:
        assert isinstance(data[-1], Commit)
        cmt.parents = [data[-1].id]
    cmt.tree = tree.id
    author = b"John Doe " + marker + b" <john@doe.net>"
    cmt.author = cmt.committer = author
    tz = parse_timezone(b'-0200')[0]
    cmt.commit_time = cmt.author_time = int(time())
    cmt.commit_timezone = cmt.author_timezone = tz
    cmt.encoding = b"UTF-8"
    cmt.message = b"The commit message " + marker
    tag = Tag()
    tag.tagger = b"john@doe.net"
    tag.message = b"Annotated tag"
    tag.tag_timezone = parse_timezone(b'-0200')[0]
    tag.tag_time = cmt.author_time
    tag.object = (Commit, cmt.id)
    tag.name = b"v_" + marker + b"_0.1"
    return blob, tree, tag, cmt


def create_commits(length=1, marker=b'Default'):
    data = []
    for i in range(0, length):
        _marker = ("%s_%s" % (marker, i)).encode()
        blob, tree, tag, cmt = create_commit(data, _marker)
        data.extend([blob, tree, tag, cmt])
    return data


@skipIf(missing_libs, skipmsg)
class FakeSwiftConnector(object):

    def __init__(self, root, conf, store=None):
        if store:
            self.store = store
        else:
            self.store = {}
        self.conf = conf
        self.root = root
        self.concurrency = 1
        self.chunk_length = 12228
        self.cache_length = 1

    def put_object(self, name, content):
        name = posixpath.join(self.root, name)
        if hasattr(content, 'seek'):
            content.seek(0)
            content = content.read()
        self.store[name] = content

    def get_object(self, name, range=None):
        name = posixpath.join(self.root, name)
        if not range:
            try:
                return BytesIO(self.store[name])
            except KeyError:
                return None
        else:
            l, r = range.split('-')
            try:
                if not l:
                    r = -int(r)
                    return self.store[name][r:]
                else:
                    return self.store[name][int(l):int(r)]
            except KeyError:
                return None

    def get_container_objects(self):
        return [{'name': k.replace(self.root + '/', '')}
                for k in self.store]

    def create_root(self):
        if self.root in self.store.keys():
            pass
        else:
            self.store[self.root] = ''

    def get_object_stat(self, name):
        name = posixpath.join(self.root, name)
        if name not in self.store:
            return None
        return {'content-length': len(self.store[name])}


@skipIf(missing_libs, skipmsg)
@skipIfPY3
class TestSwiftObjectStore(TestCase):

    def setUp(self):
        super(TestSwiftObjectStore, self).setUp()
        self.conf = swift.load_conf(file=StringIO(config_file %
                                                  def_config_file))
        self.fsc = FakeSwiftConnector('fakerepo', conf=self.conf)

    def _put_pack(self, sos, commit_amount=1, marker='Default'):
        odata = create_commits(length=commit_amount, marker=marker)
        data = [(d.type_num, d.as_raw_string()) for d in odata]
        f = BytesIO()
        build_pack(f, data, store=sos)
        sos.add_thin_pack(f.read, None)
        return odata

    def test_load_packs(self):
        store = {'fakerepo/objects/pack/pack-'+'1'*40+'.idx': '',
                 'fakerepo/objects/pack/pack-'+'1'*40+'.pack': '',
                 'fakerepo/objects/pack/pack-'+'1'*40+'.info': '',
                 'fakerepo/objects/pack/pack-'+'2'*40+'.idx': '',
                 'fakerepo/objects/pack/pack-'+'2'*40+'.pack': '',
                 'fakerepo/objects/pack/pack-'+'2'*40+'.info': ''}
        fsc = FakeSwiftConnector('fakerepo', conf=self.conf, store=store)
        sos = swift.SwiftObjectStore(fsc)
        packs = sos.packs
        self.assertEqual(len(packs), 2)
        for pack in packs:
            self.assertTrue(isinstance(pack, swift.SwiftPack))

    def test_add_thin_pack(self):
        sos = swift.SwiftObjectStore(self.fsc)
        self._put_pack(sos, 1, 'Default')
        self.assertEqual(len(self.fsc.store), 3)

    def test_find_missing_objects(self):
        commit_amount = 3
        sos = swift.SwiftObjectStore(self.fsc)
        odata = self._put_pack(sos, commit_amount, 'Default')
        head = odata[-1].id
        i = sos.iter_shas(sos.find_missing_objects([],
                                                   [head, ],
                                                   progress=None,
                                                   get_tagged=None))
        self.assertEqual(len(i), commit_amount * 3)
        shas = [d.id for d in odata]
        for sha, path in i:
            self.assertIn(sha.id, shas)

    def test_find_missing_objects_with_tag(self):
        commit_amount = 3
        sos = swift.SwiftObjectStore(self.fsc)
        odata = self._put_pack(sos, commit_amount, 'Default')
        head = odata[-1].id
        peeled_sha = dict([(sha.object[1], sha.id)
                           for sha in odata if isinstance(sha, Tag)])

        def get_tagged():
            return peeled_sha
        i = sos.iter_shas(sos.find_missing_objects([],
                                                   [head, ],
                                                   progress=None,
                                                   get_tagged=get_tagged))
        self.assertEqual(len(i), commit_amount * 4)
        shas = [d.id for d in odata]
        for sha, path in i:
            self.assertIn(sha.id, shas)

    def test_find_missing_objects_with_common(self):
        commit_amount = 3
        sos = swift.SwiftObjectStore(self.fsc)
        odata = self._put_pack(sos, commit_amount, 'Default')
        head = odata[-1].id
        have = odata[7].id
        i = sos.iter_shas(sos.find_missing_objects([have, ],
                                                   [head, ],
                                                   progress=None,
                                                   get_tagged=None))
        self.assertEqual(len(i), 3)

    def test_find_missing_objects_multiple_packs(self):
        sos = swift.SwiftObjectStore(self.fsc)