#!/usr/bin/env python3

# Libervia: an XMPP client
# Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

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

from copy import deepcopy
from unittest.mock import MagicMock, AsyncMock, patch
from urllib import parse
from functools import partial

import pytest
from pytest_twisted import ensureDeferred as ed
from twisted.internet import defer
from twisted.words.protocols.jabber import jid
from twisted.web.server import Request
from twisted.words.xish import domish
from wokkel import rsm, pubsub

from sat.core import exceptions
from sat.core.constants import Const as C
from sat.plugins import plugin_comp_ap_gateway
from sat.plugins.plugin_comp_ap_gateway import constants as ap_const
from sat.plugins.plugin_comp_ap_gateway.http_server import HTTPServer
from sat.plugins.plugin_xep_0277 import NS_ATOM
from sat.plugins.plugin_xep_0465 import NS_PPS
from sat.tools.utils import xmpp_date
from sat.tools import xml_tools
from sat.plugins.plugin_comp_ap_gateway import TYPE_ACTOR


TEST_BASE_URL = "https://example.org"
TEST_USER = "test_user"
TEST_AP_ACCOUNT = f"{TEST_USER}@example.org"
TEST_AP_ACTOR_ID = f"{TEST_BASE_URL}/users/{TEST_USER}"
PUBLIC_URL = "test.example"
TEST_JID = jid.JID(f"some_user@{PUBLIC_URL}")

AP_REQUESTS = {
    f"{TEST_BASE_URL}/.well-known/webfinger?"
    f"resource=acct:{parse.quote(TEST_AP_ACCOUNT)}": {
        "aliases": [
            f"{TEST_BASE_URL}/@{TEST_USER}",
            f"{TEST_BASE_URL}/users/{TEST_USER}"
        ],
        "links": [
            {
                "href": f"{TEST_BASE_URL}/users/{TEST_USER}",
                "rel": "self",
                "type": "application/activity+json"
            },
        ],
        "subject": f"acct:{TEST_AP_ACCOUNT}"
    },

    f"{TEST_BASE_URL}/users/{TEST_USER}": {
        "@context": [
            "https://www.w3.org/ns/activitystreams",
        ],
        "endpoints": {
            "sharedInbox": f"{TEST_BASE_URL}/inbox"
        },
        "followers": f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
        "following": f"{TEST_BASE_URL}/users/{TEST_USER}/following",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}",
        "inbox": f"{TEST_BASE_URL}/users/{TEST_USER}/inbox",
        "name": "",
        "outbox": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox",
        "preferredUsername": f"{TEST_USER}",
        "type": "Person",
        "url": f"{TEST_BASE_URL}/@{TEST_USER}"
    },
    f"{TEST_BASE_URL}/.well-known/webfinger?"
    f"resource=acct:{parse.quote('ext_user@example.org')}": {
        "aliases": [
            f"{TEST_BASE_URL}/@ext_user",
            f"{TEST_BASE_URL}/users/ext_user"
        ],
        "links": [
            {
                "href": f"{TEST_BASE_URL}/users/ext_user",
                "rel": "self",
                "type": "application/activity+json"
            },
        ],
        "subject": f"acct:ext_user@example.org"
    },
    f"{TEST_BASE_URL}/users/ext_user": {
        "@context": [
            "https://www.w3.org/ns/activitystreams",
        ],
        "endpoints": {
            "sharedInbox": f"{TEST_BASE_URL}/inbox"
        },
        "followers": f"{TEST_BASE_URL}/users/ext_user/followers",
        "following": f"{TEST_BASE_URL}/users/ext_user/following",
        "id": f"{TEST_BASE_URL}/users/ext_user",
        "inbox": f"{TEST_BASE_URL}/users/ext_user/inbox",
        "name": "",
        "outbox": f"{TEST_BASE_URL}/users/ext_user/outbox",
        "preferredUsername": f"ext_user",
        "type": "Person",
        "url": f"{TEST_BASE_URL}/@ext_user"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/outbox": {
        "@context": "https://www.w3.org/ns/activitystreams",
        "first": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox?page=true",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox",
        "last": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox?page=true",
        "totalItems": 4,
        "type": "OrderedCollection"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/outbox?page=true": {
        "@context": [
            "https://www.w3.org/ns/activitystreams",
        ],
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox?page=true",
        "orderedItems": [
            {
                "actor": f"{TEST_BASE_URL}/users/{TEST_USER}",
                "cc": [
                    f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                ],
                "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/1/activity",
                "object": {
                    "attributedTo": f"{TEST_BASE_URL}/users/{TEST_USER}",
                    "cc": [
                        f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                    ],
                    "content": "<p>test message 1</p>",
                    "contentMap": {
                        "en": "<p>test message 1</p>"
                    },
                    "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/1",
                    "inReplyTo": None,
                    "published": "2021-12-16T17:28:03Z",
                    "sensitive": False,
                    "summary": None,
                    "tag": [],
                    "to": [
                        "https://www.w3.org/ns/activitystreams#Public"
                    ],
                    "type": "Note",
                    "url": f"{TEST_BASE_URL}/@{TEST_USER}/1"
                },
                "published": "2021-12-16T17:28:03Z",
                "to": [
                    "https://www.w3.org/ns/activitystreams#Public"
                ],
                "type": "Create"
            },
            {
                "actor": f"{TEST_BASE_URL}/users/{TEST_USER}",
                "cc": [
                    f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                ],
                "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/2/activity",
                "object": {
                    "attributedTo": f"{TEST_BASE_URL}/users/{TEST_USER}",
                    "cc": [
                        f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                    ],
                    "content": "<p>test message 2</p>",
                    "contentMap": {
                        "en": "<p>test message 2</p>"
                    },
                    "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/2",
                    "inReplyTo": None,
                    "published": "2021-12-16T17:27:03Z",
                    "sensitive": False,
                    "summary": None,
                    "tag": [],
                    "to": [
                        "https://www.w3.org/ns/activitystreams#Public"
                    ],
                    "type": "Note",
                    "url": f"{TEST_BASE_URL}/@{TEST_USER}/2"
                },
                "published": "2021-12-16T17:27:03Z",
                "to": [
                    "https://www.w3.org/ns/activitystreams#Public"
                ],
                "type": "Create"
            },
            {
                "actor": f"{TEST_BASE_URL}/users/{TEST_USER}",
                "cc": [
                    f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                ],
                "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/3/activity",
                "object": {
                    "attributedTo": f"{TEST_BASE_URL}/users/{TEST_USER}",
                    "cc": [
                        f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                    ],
                    "content": "<p>test message 3</p>",
                    "contentMap": {
                        "en": "<p>test message 3</p>"
                    },
                    "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/3",
                    "inReplyTo": None,
                    "published": "2021-12-16T17:26:03Z",
                    "sensitive": False,
                    "summary": None,
                    "tag": [],
                    "to": [
                        "https://www.w3.org/ns/activitystreams#Public"
                    ],
                    "type": "Note",
                    "url": f"{TEST_BASE_URL}/@{TEST_USER}/3"
                },
                "published": "2021-12-16T17:26:03Z",
                "to": [
                    "https://www.w3.org/ns/activitystreams#Public"
                ],
                "type": "Create"
            },
            {
                "actor": f"{TEST_BASE_URL}/users/{TEST_USER}",
                "cc": [
                    f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                ],
                "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/4/activity",
                "object": {
                    "attributedTo": f"{TEST_BASE_URL}/users/{TEST_USER}",
                    "cc": [
                        f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
                    ],
                    "content": "<p>test message 4</p>",
                    "contentMap": {
                        "en": "<p>test message 4</p>"
                    },
                    "id": f"{TEST_BASE_URL}/users/{TEST_USER}/statuses/4",
                    "inReplyTo": None,
                    "published": "2021-12-16T17:25:03Z",
                    "sensitive": False,
                    "summary": None,
                    "tag": [],
                    "to": [
                        "https://www.w3.org/ns/activitystreams#Public"
                    ],
                    "type": "Note",
                    "url": f"{TEST_BASE_URL}/@{TEST_USER}/4"
                },
                "published": "2021-12-16T17:25:03Z",
                "to": [
                    "https://www.w3.org/ns/activitystreams#Public"
                ],
                "type": "Create"
            },
    ],
        "partOf": f"{TEST_BASE_URL}/users/{TEST_USER}/outbox",
        "prev": None,
        "type": "OrderedCollectionPage"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/following": {
        "@context": "https://www.w3.org/ns/activitystreams",
        "first": f"{TEST_BASE_URL}/users/{TEST_USER}/following?page=1",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/following",
        "totalItems": 2,
        "type": "OrderedCollection"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/following?page=1": {
        "@context": "https://www.w3.org/ns/activitystreams",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/following?page=1",
        "orderedItems": [
            f"{TEST_BASE_URL}/users/ext_user",
            f"https://{PUBLIC_URL}/_ap/{TYPE_ACTOR}/local_user%40{PUBLIC_URL}",
        ],
        "partOf": "{TEST_BASE_URL}/users/{TEST_USER}/following",
        "totalItems": 2,
        "type": "OrderedCollectionPage"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/followers": {
        "@context": "https://www.w3.org/ns/activitystreams",
        "first": f"{TEST_BASE_URL}/users/{TEST_USER}/followers?page=1",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/followers",
        "totalItems": 2,
        "type": "OrderedCollection"
    },
    f"{TEST_BASE_URL}/users/{TEST_USER}/followers?page=1": {
        "@context": "https://www.w3.org/ns/activitystreams",
        "id": f"{TEST_BASE_URL}/users/{TEST_USER}/followers?page=1",
        "orderedItems": [
            f"{TEST_BASE_URL}/users/ext_user",
            f"https://{PUBLIC_URL}/_ap/{TYPE_ACTOR}/local_user%40{PUBLIC_URL}",
        ],
        "partOf": "{TEST_BASE_URL}/users/{TEST_USER}/followers",
        "totalItems": 2,
        "type": "OrderedCollectionPage"
    },

}

XMPP_ITEM_TPL = """
<item id='{id}' publisher='{publisher_jid}'>
  <entry xmlns='http://www.w3.org/2005/Atom' xml:lang='en'>
    <title type='xhtml'>
      <div xmlns='http://www.w3.org/1999/xhtml'>
        <p>
          XMPP item {id}
        </p>
      </div>
    </title>
    <title type='text'>
      XMPP item {id}
    </title>
    <author>
      <name>
        test_user
      </name>
      <uri>
        xmpp:{publisher_jid}
      </uri>
    </author>
    <updated>
      {updated}
    </updated>
    <published>
      {published}
    </published>
    <id>
      xmpp:{publisher_jid}?;node=urn%3Axmpp%3Amicroblog%3A0;item={id}
    </id>
  </entry>
</item>
"""

ITEM_BASE_TS = 1643385499
XMPP_ITEMS = [
    xml_tools.parse(
        "".join(
            l.strip() for l in XMPP_ITEM_TPL.format(
                id=i,
                publisher_jid="some_user@test.example",
                updated=xmpp_date(ITEM_BASE_TS + i * 60),
                published=xmpp_date(ITEM_BASE_TS + i * 60),
            ).split("\n")
        ),
        namespace=pubsub.NS_PUBSUB
    )
    for i in range(1, 5)
]


async def mock_ap_get(url):
    return deepcopy(AP_REQUESTS[url])


async def mock_treq_json(data):
    return dict(data)


async def mock_getItems(*args, **kwargs):
    ret_items = kwargs.pop("ret_items", XMPP_ITEMS)
    rsm_resp = rsm.RSMResponse(
        first=ret_items[0]["id"],
        last=ret_items[-1]["id"],
        index=0,
        count=len(ret_items)
    )
    return ret_items, {"rsm": rsm_resp.toDict(), "complete": True}


def getVirtualClient(jid):
    client = MagicMock()
    client.jid = jid
    return client


@pytest.fixture(scope="session")
def ap_gateway(host):
    gateway = plugin_comp_ap_gateway.APGateway(host)
    gateway.initialised = True
    gateway.isPubsub = AsyncMock()
    gateway.isPubsub.return_value = False
    client = MagicMock()
    client.jid = jid.JID("ap.test.example")
    client.host = "test.example"
    client.getVirtualClient = getVirtualClient
    gateway.client = client
    gateway.local_only = True
    gateway.public_url = PUBLIC_URL
    gateway.ap_path = '_ap'
    gateway.base_ap_url = parse.urljoin(
        f"https://{gateway.public_url}",
        f"{gateway.ap_path}/"
    )
    gateway.server = HTTPServer(gateway)
    return gateway


class TestActivityPubGateway:

    def getTitleXHTML(self, item_elt: domish.Element) -> domish.Element:
        return next(
            t for t in item_elt.entry.elements(NS_ATOM, "title")
            if t.getAttribute("type") == "xhtml"
        )


    @ed
    async def test_jid_and_node_convert_to_ap_handle(self, ap_gateway):
        """JID and pubsub node are converted correctly to an AP actor handle"""
        get_account = ap_gateway.getAPAccountFromJidAndNode

        # local jid
        assert await get_account(
            jid_ = jid.JID("simple@test.example"),
            node = None
        ) == "simple@test.example"

        # non local jid
        assert await get_account(
            jid_ = jid.JID("simple@example.org"),
            node = None
        ) == "___simple.40example.2eorg@ap.test.example"

        # local jid with non microblog node
        assert await get_account(
            jid_ = jid.JID("simple@test.example"),
            node = "some_other_node"
        ) == "some_other_node---simple@test.example"

        # local pubsub node
        with patch.object(ap_gateway, "isPubsub") as isPubsub:
            isPubsub.return_value = True
            assert await get_account(
                jid_ = jid.JID("pubsub.test.example"),
                node = "some_node"
            ) == "some_node@pubsub.test.example"

        # non local pubsub node
        with patch.object(ap_gateway, "isPubsub") as isPubsub:
            isPubsub.return_value = True
            assert await get_account(
                jid_ = jid.JID("pubsub.example.org"),
                node = "some_node"
            ) == "___some_node.40pubsub.2eexample.2eorg@ap.test.example"

    @ed
    async def test_ap_handle_convert_to_jid_and_node(self, ap_gateway, monkeypatch):
        """AP actor handle convert correctly to JID and pubsub node"""
        get_jid_node = ap_gateway.getJIDAndNode

        # for following assertion, host is not a pubsub service
        with patch.object(ap_gateway, "isPubsub") as isPubsub:
            isPubsub.return_value = False

            # simple local jid
            assert await get_jid_node(
                "toto@test.example"
            ) == (jid.JID("toto@test.example"), None)

            # simple external jid

            ## with "local_only" set, it should raise an exception
            with pytest.raises(exceptions.PermissionError):
                await get_jid_node("toto@example.org")

            ## with "local_only" unset, it should work
            with monkeypatch.context() as m:
                m.setattr(ap_gateway, "local_only", False, raising=True)
                assert await get_jid_node(
                    "toto@example.org"
                ) == (jid.JID("toto@example.org"), None)

            # explicit node
            assert await get_jid_node(
                "tata---toto@test.example"
            ) == (jid.JID("toto@test.example"), "tata")

        # for following assertion, host is a pubsub service
        with patch.object(ap_gateway, "isPubsub") as isPubsub:
            isPubsub.return_value = True

            # simple local node
            assert await get_jid_node(
                "toto@pubsub.test.example"
            ) == (jid.JID("pubsub.test.example"), "toto")

            # encoded local node
            assert await get_jid_node(
                "___urn.3axmpp.3amicroblog.3a0@pubsub.test.example"
            ) == (jid.JID("pubsub.test.example"), "urn:xmpp:microblog:0")

    @ed
    async def test_ap_to_pubsub_conversion(self, ap_gateway, monkeypatch):
        """AP requests are converted to pubsub"""
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "get", mock_ap_get)
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "json_content", mock_treq_json)
        monkeypatch.setattr(ap_gateway, "apGet", mock_ap_get)

        actor_data = await ap_gateway.getAPActorDataFromAccount(TEST_AP_ACCOUNT)
        outbox = await ap_gateway.apGetObject(actor_data, "outbox")
        items, rsm_resp = await ap_gateway.getAPItems(outbox, 2)

        assert rsm_resp.count == 4
        assert rsm_resp.index == 0
        assert rsm_resp.first == "https://example.org/users/test_user/statuses/4"
        assert rsm_resp.last == "https://example.org/users/test_user/statuses/3"

        title_xhtml = self.getTitleXHTML(items[0])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 4</p></div>"
            "</title>"
        )
        author_uri = str(
            [e for e in items[0].entry.author.elements() if e.name == "uri"][0]
        )
        assert author_uri == "xmpp:test_user\\40example.org@ap.test.example"
        assert str(items[0].entry.published) == "2021-12-16T17:25:03Z"

        title_xhtml = self.getTitleXHTML(items[1])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 3</p></div>"
            "</title>"
        )
        author_uri = str(
            [e for e in items[1].entry.author.elements() if e.name == "uri"][0]
        )
        assert author_uri == "xmpp:test_user\\40example.org@ap.test.example"
        assert str(items[1].entry.published) == "2021-12-16T17:26:03Z"

        items, rsm_resp = await ap_gateway.getAPItems(
            outbox,
            max_items=2,
            after_id="https://example.org/users/test_user/statuses/3",
        )

        assert rsm_resp.count == 4
        assert rsm_resp.index == 2
        assert rsm_resp.first == "https://example.org/users/test_user/statuses/2"
        assert rsm_resp.last == "https://example.org/users/test_user/statuses/1"

        title_xhtml = self.getTitleXHTML(items[0])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 2</p></div>"
            "</title>"
        )
        author_uri = str(
            [e for e in items[0].entry.author.elements() if e.name == "uri"][0]
        )
        assert author_uri == "xmpp:test_user\\40example.org@ap.test.example"
        assert str(items[0].entry.published) == "2021-12-16T17:27:03Z"

        title_xhtml = self.getTitleXHTML(items[1])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 1</p></div>"
            "</title>"
        )
        author_uri = str(
            [e for e in items[1].entry.author.elements() if e.name == "uri"][0]
        )
        assert author_uri == "xmpp:test_user\\40example.org@ap.test.example"
        assert str(items[1].entry.published) == "2021-12-16T17:28:03Z"

        items, rsm_resp = await ap_gateway.getAPItems(
            outbox,
            max_items=1,
            start_index=2
        )

        assert rsm_resp.count == 4
        assert rsm_resp.index == 2
        assert rsm_resp.first == "https://example.org/users/test_user/statuses/2"
        assert rsm_resp.last == "https://example.org/users/test_user/statuses/2"
        assert len(items) == 1

        title_xhtml = self.getTitleXHTML(items[0])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 2</p></div>"
            "</title>"
        )
        assert str(items[0].entry.published) == "2021-12-16T17:27:03Z"

        items, rsm_resp = await ap_gateway.getAPItems(
            outbox,
            max_items=3,
            chronological_pagination=False
        )
        assert rsm_resp.count == 4
        assert rsm_resp.index == 1
        assert rsm_resp.first == "https://example.org/users/test_user/statuses/3"
        assert rsm_resp.last == "https://example.org/users/test_user/statuses/1"
        assert len(items) == 3
        title_xhtml = self.getTitleXHTML(items[0])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 3</p></div>"
            "</title>"
        )
        title_xhtml = self.getTitleXHTML(items[2])
        assert title_xhtml.toXml() == (
            "<title xmlns='http://www.w3.org/2005/Atom' type='xhtml'>"
            "<div xmlns='http://www.w3.org/1999/xhtml'><p>test message 1</p></div>"
            "</title>"
        )

    def ap_request_params(self, ap_gateway, type_=None, url=None, query_data=None):
        """Generate parameters for HTTPAPGServer's AP*Request

        @param type_: one of the AP query type (e.g. "outbox")
        @param url: URL to query (mutually exclusif with type_)
        @param query_data: query data as returned by parse.parse_qs
        @return dict with kw params to use
        """
        assert type_ and url is None or url and type_ is None
        if type_ is not None:
            path = f"_ap/{type_}/some_user%40test.example"
        else:
            url_parsed = parse.urlparse(url)
            path = url_parsed.path.lstrip("/")
            type_ = path.split("/")[1]
            if query_data is None:
                query_data = parse.parse_qs(url_parsed.query)

        if query_data:
            uri = f"{path}?{parse.urlencode(query_data, doseq=True)}"
        else:
            uri = path

        test_jid = jid.JID("some_user@test.example")
        request = Request(MagicMock())
        request.path = path.encode()
        request.uri = uri.encode()
        ap_url = parse.urljoin(
            f"https://{ap_gateway.public_url}",
            path
        )
        kwargs = {
            "request": request,
            "account_jid": test_jid,
            "node": None,
            "ap_account": test_jid.full(),
            "ap_url": ap_url,
            "signing_actor": None
        }
        if type_ == "outbox" and query_data:
            kwargs["query_data"] = query_data
            # signing_actor is not used for page requests
            del kwargs["signing_actor"]
        return kwargs

    @ed
    async def test_pubsub_to_ap_conversion(self, ap_gateway, monkeypatch):
        """Pubsub nodes are converted to AP collections"""
        monkeypatch.setattr(ap_gateway._p, "getItems", mock_getItems)
        outbox = await ap_gateway.server.resource.APOutboxRequest(
            **self.ap_request_params(ap_gateway, "outbox")
        )
        assert outbox["@context"] == "https://www.w3.org/ns/activitystreams"
        assert outbox["id"] == "https://test.example/_ap/outbox/some_user%40test.example"
        assert outbox["totalItems"] == len(XMPP_ITEMS)
        assert outbox["type"] == "OrderedCollection"
        assert outbox["first"]
        assert outbox["last"]

        first_page = await ap_gateway.server.resource.APOutboxPageRequest(
            **self.ap_request_params(ap_gateway, url=outbox["first"])
        )
        assert first_page["@context"] == "https://www.w3.org/ns/activitystreams"
        assert first_page["id"] == "https://test.example/_ap/outbox/some_user%40test.example?page=first"
        assert first_page["type"] == "OrderedCollectionPage"
        assert first_page["partOf"] == outbox["id"]
        assert len(first_page["orderedItems"]) == len(XMPP_ITEMS)
        first_item = first_page["orderedItems"][0]
        assert first_item["@context"] == "https://www.w3.org/ns/activitystreams"
        assert first_item["id"] == "https://test.example/_ap/item/some_user%40test.example/4"
        assert first_item["actor"] == "https://test.example/_ap/actor/some_user%40test.example"
        assert first_item["type"] == "Create"
        first_item_obj = first_item["object"]
        assert first_item_obj["id"] == first_item["id"]
        assert first_item_obj["type"] == "Note"
        assert first_item_obj["published"] == "2022-01-28T16:02:19Z"
        assert first_item_obj["attributedTo"] == first_item["actor"]
        assert first_item_obj["content"] == "<div><p>XMPP item 4</p></div>"
        assert first_item_obj["to"] == ["https://www.w3.org/ns/activitystreams#Public"]

    @ed
    async def test_following_to_pps(self, ap_gateway, monkeypatch):
        """AP following items are converted to Public Pubsub Subscription subscriptions"""
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "get", mock_ap_get)
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "json_content", mock_treq_json)
        monkeypatch.setattr(ap_gateway, "apGet", mock_ap_get)

        items, __ = await ap_gateway.pubsub_service.items(
            jid.JID("toto@example.org"),
            ap_gateway.getLocalJIDFromAccount(TEST_AP_ACCOUNT),
            ap_gateway._pps.subscriptions_node,
            None,
            None,
            None
        )
        assert len(items) == 2
        for idx, entity in enumerate((
                "local_user@test.example",
                "ext_user\\40example.org@ap.test.example"
        )):
            subscription_elt = next(items[idx].elements(NS_PPS, "subscription"), None)
            assert subscription_elt is not None
            assert subscription_elt["node"] == ap_gateway._m.namespace
            assert subscription_elt["service"] == entity

    @ed
    async def test_followers_to_pps(self, ap_gateway, monkeypatch):
        """AP followers items are converted to Public Pubsub Subscription subscribers"""
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "get", mock_ap_get)
        monkeypatch.setattr(plugin_comp_ap_gateway.treq, "json_content", mock_treq_json)
        monkeypatch.setattr(ap_gateway, "apGet", mock_ap_get)

        items, __ = await ap_gateway.pubsub_service.items(
            jid.JID("toto@example.org"),
            ap_gateway.getLocalJIDFromAccount(TEST_AP_ACCOUNT),
            ap_gateway._pps.getPublicSubscribersNode(ap_gateway._m.namespace),
            None,
            None,
            None
        )
        assert len(items) == 2
        for idx, entity in enumerate((
                "local_user@test.example",
                "ext_user\\40example.org@ap.test.example"
        )):
            subscriber_elt = next(items[idx].elements(NS_PPS, "subscriber"), None)
            assert subscriber_elt is not None
            assert subscriber_elt["jid"] == entity

    @ed
    async def test_pps_to_following(self, ap_gateway, monkeypatch):
        """Public Pubsub Subscription subscriptions are converted to AP following items"""
        subscriptions = [
            pubsub.Item(
                id="subscription_1",
                payload = ap_gateway._pps.buildSubscriptionElt(
                    ap_gateway._m.namespace,
                    jid.JID("local_user@test.example")
                )
            ),
            pubsub.Item(
                id="subscription_2",
                payload = ap_gateway._pps.buildSubscriptionElt(
                    ap_gateway._m.namespace,
                    jid.JID("ext_user\\40example.org@ap.test.example")
                )
            )
        ]
        monkeypatch.setattr(ap_gateway._p, "getItems", partial(
            mock_getItems,
            ret_items=subscriptions
        ))
        following = await ap_gateway.server.resource.APFollowingRequest(
            **self.ap_request_params(ap_gateway, "following")
        )
        assert following["@context"] == "https://www.w3.org/ns/activitystreams"
        assert following["id"] == "https://test.example/_ap/following/some_user%40test.example"
        assert following["totalItems"] == len(subscriptions)
        assert following["type"] == "OrderedCollection"
        assert following.get("first")

        first_page = following["first"]
        assert first_page["type"] == "OrderedCollectionPage"
        assert len(first_page["orderedItems"]) == len(subscriptions)
        items = first_page["orderedItems"]
        assert items == ['local_user@test.example', 'ext_user@example.org']

    @ed
    async def test_pps_to_followers(self, ap_gateway, monkeypatch):
        """Public Pubsub Subscription subscribers are converted to AP followers"""
        subscribers = [
            pubsub.Item(
                id="subscriber_1",
                payload = ap_gateway._pps.buildSubscriberElt(
                    jid.JID("local_user@test.example")
                )
            ),
            pubsub.Item(
                id="subscriber_2",
                payload = ap_gateway._pps.buildSubscriberElt(
                    jid.JID("ext_user\\40example.org@ap.test.example")
                )
            )
        ]
        monkeypatch.setattr(ap_gateway._p, "getItems", partial(
            mock_getItems,
            ret_items=subscribers
        ))
        followers = await ap_gateway.server.resource.APFollowersRequest(
            **self.ap_request_params(ap_gateway, "followers")
        )
        assert followers["@context"] == "https://www.w3.org/ns/activitystreams"
        assert followers["id"] == "https://test.example/_ap/followers/some_user%40test.example"
        assert followers["totalItems"] == len(subscribers)
        assert followers["type"] == "OrderedCollection"
        assert followers.get("first")

        first_page = followers["first"]
        assert first_page["type"] == "OrderedCollectionPage"
        assert len(first_page["orderedItems"]) == len(subscribers)
        items = first_page["orderedItems"]
        assert items == ['local_user@test.example', 'ext_user@example.org']