#!/usr/bin/env python3

# Libervia: an XMPP client
# Copyright (C) 2009-2024 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 unittest.mock import AsyncMock, MagicMock

import pytest
from pytest_twisted import ensureDeferred as ed
from twisted.words.protocols.jabber import jid

from libervia.backend.core import exceptions
from libervia.backend.plugins.plugin_xep_0166 import XEP_0166
from libervia.backend.plugins.plugin_xep_0234 import XEP_0234
from libervia.backend.tools import xml_tools


@pytest.fixture(autouse=True)
def no_application_register(monkeypatch):
    """Do not register the application in XEP-0166"""
    monkeypatch.setattr(XEP_0166, "register_application", lambda *a, **kw: None)


class TestXEP0234:

    @ed
    async def test_parse_file_element(self, host, client):
        """``parse_file_element`` updates file_data dictionary correctly."""
        xep_0234 = XEP_0234(host)
        file_elt = xml_tools.parse(
            """
            <file xmlns='urn:xmpp:jingle:apps:file-transfer:5'>
                <media-type>text/plain</media-type>
                <name>test.txt</name>
                <date>2015-07-26T21:46:00+01:00</date>
                <size>6144</size>
              </file>
            """
        )
        file_data = {}

        result = await xep_0234.parse_file_element(client, file_elt, file_data)

        expected = {
            "mime_type": "text/plain",
            "modified": 1437943560,
            "name": "test.txt",
            "size": 6144,
        }

        assert result == expected

    @ed
    async def test_parse_file_element_no_file_element(self, host, client):
        """Raise NotFound exception if no <file> element is provided."""
        xep_0234 = XEP_0234(host)
        with pytest.raises(exceptions.DataError):
            await xep_0234.parse_file_element(client, None)

    @ed
    async def test_parse_file_element_invalid_file_element(self, host, client):
        """Raise DataError exception if <file> element is invalid."""
        xep_0234 = XEP_0234(host)
        file_elt = xml_tools.parse(
            """
            <file xmlns='invalid_namespace'>
                <name>example.txt</name>
            </file>
            """
        )
        with pytest.raises(exceptions.DataError):
            await xep_0234.parse_file_element(client, file_elt)

    @ed
    async def test_file_receiving_request_conf(self, monkeypatch, host, client):
        """Normal use case call "get_dest_dir"."""

        async def mock_defer_confirm(*args, **kwargs):
            """Simulate defer_confirm always confirming."""
            return True

        monkeypatch.setattr(xml_tools, "defer_confirm", mock_defer_confirm)

        xep_0234 = XEP_0234(host)
        monkeypatch.setattr(
            xep_0234._hash, "parse_hash_elt", MagicMock(return_value=(None, None))
        )
        mock_get_dest_dir = AsyncMock()
        mock_get_dest_dir.return_value = True
        monkeypatch.setattr(xep_0234._f, "get_dest_dir", mock_get_dest_dir)

        session = {
            "peer_jid": jid.JID("peer@example.com"),
            "file_accepted": False,
            "id": "session_id",
        }
        content_data = {"application_data": {}, "transport_data": {"webrtc": False}}
        content_name = "dummy_content"
        file_data = {"progress_id": "123"}
        file_elt = xml_tools.parse(
            """
            <file xmlns='urn:xmpp:jingle:apps:file-transfer:5'>
                <media-type>text/plain</media-type>
                <name>test.txt</name>
                <date>2015-07-26T21:46:00+01:00</date>
                <size>6144</size>
              </file>
            """
        )

        confirmed = await xep_0234._file_receiving_request_conf(
            client, session, content_data, content_name, file_data, file_elt
        )

        assert confirmed is True
        assert (
            mock_get_dest_dir.called
        ), '"get_dest_dir" must be called for non WebRTC case.'

    @ed
    async def test_file_receiving_request_conf_webrtc(self, monkeypatch, host, client):
        """WebRTC use case is handled correctly for received confirmation."""

        async def mock_defer_confirm(*args, **kwargs):
            """Simulate defer_confirm always confirming."""
            return True

        monkeypatch.setattr(xml_tools, "defer_confirm", mock_defer_confirm)

        xep_0234 = XEP_0234(host)
        monkeypatch.setattr(
            xep_0234._hash, "parse_hash_elt", MagicMock(return_value=(None, None))
        )
        mock_get_dest_dir = AsyncMock()
        mock_get_dest_dir.return_value = True
        monkeypatch.setattr(xep_0234._f, "get_dest_dir", mock_get_dest_dir)

        session = {
            "peer_jid": jid.JID("peer@example.com"),
            "file_accepted": False,
            "id": "session_id",
        }
        content_data = {"application_data": {}, "transport_data": {"webrtc": True}}
        content_name = "dummy_content"
        file_data = {"progress_id": "123"}
        file_elt = xml_tools.parse(
            """
            <file xmlns='urn:xmpp:jingle:apps:file-transfer:5'>
                <media-type>text/plain</media-type>
                <name>test.txt</name>
                <date>2015-07-26T21:46:00+01:00</date>
                <size>6144</size>
              </file>
            """
        )

        confirmed = await xep_0234._file_receiving_request_conf(
            client, session, content_data, content_name, file_data, file_elt
        )

        assert confirmed is True
        # The file is handled by frontend in WebRTC case, so "get_dest_dir" must not be
        # called.
        assert (
            not mock_get_dest_dir.called
        ), '"get_dest_dir" must not be called for WebRTC case.'