# RhodeCode VCSServer provides access to different vcs backends via network.
# Copyright (C) 2014-2023 RhodeCode GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

import threading
import msgpack

from http.server import BaseHTTPRequestHandler
from socketserver import TCPServer

import mercurial.ui
import mock
import pytest

from vcsserver.hooks import HooksHttpClient
from vcsserver.lib.rc_json import json
from vcsserver import hooks


def get_hg_ui(extras=None):
    """Create a Config object with a valid RC_SCM_DATA entry."""
    extras = extras or {}
    required_extras = {
        'username': '',
        'repository': '',
        'locked_by': '',
        'scm': '',
        'make_lock': '',
        'action': '',
        'ip': '',
        'hooks_uri': 'fake_hooks_uri',
    }
    required_extras.update(extras)
    hg_ui = mercurial.ui.ui()
    hg_ui.setconfig(b'rhodecode', b'RC_SCM_DATA', json.dumps(required_extras))

    return hg_ui


def test_git_pre_receive_is_disabled():
    extras = {'hooks': ['pull']}
    response = hooks.git_pre_receive(None, None,
                                     {'RC_SCM_DATA': json.dumps(extras)})

    assert response == 0


def test_git_post_receive_is_disabled():
    extras = {'hooks': ['pull']}
    response = hooks.git_post_receive(None, '',
                                      {'RC_SCM_DATA': json.dumps(extras)})

    assert response == 0


def test_git_post_receive_calls_repo_size():
    extras = {'hooks': ['push', 'repo_size']}

    with mock.patch.object(hooks, '_call_hook') as call_hook_mock:
        hooks.git_post_receive(
            None, '', {'RC_SCM_DATA': json.dumps(extras)})
    extras.update({'commit_ids': [], 'hook_type': 'post_receive',
                   'new_refs': {'bookmarks': [], 'branches': [], 'tags': []}})
    expected_calls = [
        mock.call('repo_size', extras, mock.ANY),
        mock.call('post_push', extras, mock.ANY),
    ]
    assert call_hook_mock.call_args_list == expected_calls


def test_git_post_receive_does_not_call_disabled_repo_size():
    extras = {'hooks': ['push']}

    with mock.patch.object(hooks, '_call_hook') as call_hook_mock:
        hooks.git_post_receive(
            None, '', {'RC_SCM_DATA': json.dumps(extras)})
    extras.update({'commit_ids': [], 'hook_type': 'post_receive',
                   'new_refs': {'bookmarks': [], 'branches': [], 'tags': []}})
    expected_calls = [
        mock.call('post_push', extras, mock.ANY)
    ]
    assert call_hook_mock.call_args_list == expected_calls


def test_repo_size_exception_does_not_affect_git_post_receive():
    extras = {'hooks': ['push', 'repo_size']}
    status = 0

    def side_effect(name, *args, **kwargs):
        if name == 'repo_size':
            raise Exception('Fake exception')
        else:
            return status

    with mock.patch.object(hooks, '_call_hook') as call_hook_mock:
        call_hook_mock.side_effect = side_effect
        result = hooks.git_post_receive(
            None, '', {'RC_SCM_DATA': json.dumps(extras)})
    assert result == status


def test_git_pre_pull_is_disabled():
    assert hooks.git_pre_pull({'hooks': ['push']}) == hooks.HookResponse(0, '')


def test_git_post_pull_is_disabled():
    assert (
        hooks.git_post_pull({'hooks': ['push']}) == hooks.HookResponse(0, ''))


class TestGetHooksClient:

    def test_returns_http_client_when_protocol_matches(self):
        hooks_uri = 'localhost:8000'
        result = hooks._get_hooks_client({
            'hooks_uri': hooks_uri,
            'hooks_protocol': 'http'
        })
        assert isinstance(result, hooks.HooksHttpClient)
        assert result.hooks_uri == hooks_uri

    def test_return_celery_client_when_queue_and_backend_provided(self):
        task_queue = 'redis://task_queue:0'
        task_backend = task_queue
        result = hooks._get_hooks_client({
            'task_queue': task_queue,
            'task_backend': task_backend
        })
        assert isinstance(result, hooks.HooksCeleryClient)


class TestHooksHttpClient:
    def test_init_sets_hooks_uri(self):
        uri = 'localhost:3000'
        client = hooks.HooksHttpClient(uri)
        assert client.hooks_uri == uri

    def test_serialize_returns_serialized_string(self):
        client = hooks.HooksHttpClient('localhost:3000')
        hook_name = 'test'
        extras = {
            'first': 1,
            'second': 'two'
        }
        hooks_proto, result = client._serialize(hook_name, extras)
        expected_result = msgpack.packb({
            'method': hook_name,
            'extras': extras,
        })
        assert hooks_proto == {'rc-hooks-protocol': 'msgpack.v1', 'Connection': 'keep-alive'}
        assert result == expected_result

    def test_call_queries_http_server(self, http_mirror):
        client = hooks.HooksHttpClient(http_mirror.uri)
        hook_name = 'test'
        extras = {
            'first': 1,
            'second': 'two'
        }
        result = client(hook_name, extras)
        expected_result = msgpack.unpackb(msgpack.packb({
            'method': hook_name,
            'extras': extras
        }), raw=False)
        assert result == expected_result


@pytest.fixture
def http_mirror(request):
    server = MirrorHttpServer()
    request.addfinalizer(server.stop)
    return server


class MirrorHttpHandler(BaseHTTPRequestHandler):

    def do_POST(self):
        length = int(self.headers['Content-Length'])
        body = self.rfile.read(length)
        self.send_response(200)
        self.end_headers()
        self.wfile.write(body)


class MirrorHttpServer:
    ip_address = '127.0.0.1'
    port = 0

    def __init__(self):
        self._daemon = TCPServer((self.ip_address, 0), MirrorHttpHandler)
        _, self.port = self._daemon.server_address
        self._thread = threading.Thread(target=self._daemon.serve_forever)
        self._thread.daemon = True
        self._thread.start()

    def stop(self):
        self._daemon.shutdown()
        self._thread.join()
        self._daemon = None
        self._thread = None

    @property
    def uri(self):
        return '{}:{}'.format(self.ip_address, self.port)


def test_hooks_http_client_init():
    hooks_uri = 'http://localhost:8000'
    client = HooksHttpClient(hooks_uri)
    assert client.hooks_uri == hooks_uri


def test_hooks_http_client_call():
    hooks_uri = 'http://localhost:8000'

    method = 'test_method'
    extras = {'key': 'value'}

    with \
        mock.patch('http.client.HTTPConnection') as mock_connection,\
        mock.patch('msgpack.load') as mock_load:

        client = HooksHttpClient(hooks_uri)

        mock_load.return_value = {'result': 'success'}
        response = mock.MagicMock()
        response.status = 200
        mock_connection.request.side_effect = None
        mock_connection.getresponse.return_value = response

        result = client(method, extras)

        mock_connection.assert_called_with(hooks_uri)
        mock_connection.return_value.request.assert_called_once()
        assert result == {'result': 'success'}


def test_hooks_http_client_serialize():
    method = 'test_method'
    extras = {'key': 'value'}
    headers, body = HooksHttpClient._serialize(method, extras)

    assert headers == {'rc-hooks-protocol': HooksHttpClient.proto, 'Connection': 'keep-alive'}
    assert msgpack.unpackb(body) == {'method': method, 'extras': extras}