# -*- coding: utf-8 -*-

##########################################################################
# OpenLP - Open Source Lyrics Projection                                 #
# ---------------------------------------------------------------------- #
# Copyright (c) 2008-2023 OpenLP Developers                              #
# ---------------------------------------------------------------------- #
# 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, see <https://www.gnu.org/licenses/>. #
##########################################################################
from collections import namedtuple
from pathlib import Path
from unittest.mock import MagicMock

from openlp.core.common.registry import Registry
from openlp.core.common.enum import PluginStatus
from openlp.core.display.render import Renderer
from openlp.core.lib.serviceitem import ServiceItem
from openlp.core.state import State
from tests.openlp_core.lib.test_serviceitem import TEST_PATH as SERVICEITEM_TEST_PATH
from tests.utils import convert_file_service_item


# Search options tests
def test_bibles_search_options_returns_list(flask_client, settings):
    """
    Test a list is returned when a plugin's search options are requested.

    Returns an empty list here because the plugin is mocked so there are no options.
    """
    # GIVEN: A mocked plugin
    mock_plugin_manager = MagicMock()
    mock_plugin_manager.get_plugin_by_name.return_value = MagicMock()
    Registry().register('plugin_manager', mock_plugin_manager)

    # WHEN: Search options are requested
    res = flask_client.get('/api/v2/plugins/bibles/search-options').get_json()

    # THEN: A empty list should be returned
    assert res == []


def test_bibles_set_search_options_sets_bible_version(flask_client, settings):
    """
    Test that a search option post request sends the correct values to the plugin,
    and returns the correct status code.
    """
    # GIVEN: A mocked bible plugin
    mock_plugin_manager = MagicMock()
    mock_bible_plugin = MagicMock()
    mock_bible_plugin.status = PluginStatus.Active
    mock_bible_plugin.media_item = MagicMock(set_search_option=MagicMock(return_value=True))
    mock_plugin_manager.get_plugin_by_name.return_value = mock_bible_plugin
    Registry().register('plugin_manager', mock_plugin_manager)

    # WHEN: The primary bible is requested to change via the api
    res = flask_client.post('/api/v2/plugins/bibles/search-options', json=dict(option='primary bible', value='foo'))

    # THEN: Returns correct status code and sends correct values to plugin.
    assert res.status_code == 204
    mock_bible_plugin.media_item.set_search_option.assert_called_once_with('primary bible', 'foo')


def test_plugin_set_search_option_aborts_if_no_option(flask_client, settings):
    Registry().register('plugin_manager', MagicMock())
    res = flask_client.post('/api/v2/plugins/songs/search-options')
    assert res.status_code == 400


def test_plugin_set_search_option_aborts_if_invalid_option(flask_client, settings):
    Registry().register('plugin_manager', MagicMock())
    res1 = flask_client.post('/api/v2/plugins/songs/search-options', json=dict(option=['']))
    res2 = flask_client.post('/api/v2/plugins/songs/search-options', json=dict(option={1: '', 2: ''}))
    assert res1.status_code == 400
    assert res2.status_code == 400


def test_plugin_search_options_returns_no_search_options(flask_client, settings):
    Registry().register('plugin_manager', MagicMock())
    res = flask_client.get('/api/v2/plugins/songs/search-options')
    assert res.status_code == 200


def test_plugin_set_search_option_returns_plugin_exception(flask_client, settings):
    Registry().register('plugin_manager', MagicMock())
    res = flask_client.post('/api/v2/plugins/songs/search-options', json=dict(option=''))
    assert res.status_code == 400


def test_plugin_songs_transpose_returns_plugin_exception(flask_client, settings):
    Registry().register('plugin_manager', MagicMock())
    res = flask_client.get('/api/v2/plugins/songs/transpose-live-item/test')
    assert res.status_code == 400


TransposeMockReturn = namedtuple('TransposeMockReturn', ['renderer_mock_any_attr'])


def _init_transpose_mocks():
    # GIVEN: A mocked plugin_manager, live_controller, renderer and a real service item with the internal slide cache
    # filled
    Registry().register('plugin_manager', MagicMock())
    renderer_mock = MagicMock()
    # Mocking every Renderer attribute with a shared mock so we can know whether any property of it was called
    renderer_mock_any_attr = MagicMock(name='Renderer attribute/call')
    for name in dir(Renderer):
        # Mocking every Renderer property
        # skipping dunder/hide methods
        if not name.startswith('_'):
            setattr(renderer_mock, name, renderer_mock_any_attr)
    # Mocking format_slides to return the correct data to ServiceItem
    renderer_mock.format_slide.side_effect = lambda text, item: text
    Registry().register('renderer', renderer_mock)
    service_item = ServiceItem()
    live_controller_mock = MagicMock()
    live_controller_mock.service_item = service_item
    Registry().register('live_controller', live_controller_mock)
    # Using a real item to test this
    line = convert_file_service_item(SERVICEITEM_TEST_PATH, 'serviceitem-song-linked-audio.osj')
    State().load_settings()  # needed to make the below method not fail
    service_item.set_from_service(line, Path('/test/'))
    # Trying to retrive the slides to trigger the cache prime process (as it's primed when using the service item first
    # time in OpenLP)
    service_item.rendered_slides
    # Resetting the mocks to correctly compute illegal calls
    renderer_mock_any_attr.reset_mock()
    renderer_mock.format_slides.reset_mock()

    return TransposeMockReturn(renderer_mock_any_attr=renderer_mock_any_attr)


def test_plugin_songs_transpose_wont_call_renderer(flask_client, settings):
    """
    Tests whether the transpose endpoint won't tries to use any Renderer method; the endpoint needs to operate using
    already-primed caches (as that's what the /live-item endpoint does); also using Renderer from outside the Qt loop
    causes it to crash.

    See https://gitlab.com/openlp/openlp/-/merge_requests/516 for some background on this.
    """
    # GIVEN: The default mocks for Transpose API
    mocks = _init_transpose_mocks()

    # WHEN: The endpoint is called
    flask_client.get('/api/v2/plugins/songs/transpose-live-item/-1')

    # THEN: The renderer should not be called
    mocks.renderer_mock_any_attr.assert_not_called()


def test_plugin_songs_transpose_accepts_response_format_service_item(flask_client, settings):
    """
    Tests whether the transpose's return_service_item parameter works
    """

    # GIVEN: The default mocks for Transpose API and the default response
    _init_transpose_mocks()

    # WHEN: The transpose action returning service_item is called
    service_item_res = flask_client.get('/api/v2/plugins/songs/transpose-live-item/-1?response_format=service_item')

    # THEN: The service item response shouldn't match normal response and should be a service_item response
    response = service_item_res.json
    assert 'capabilities' in response
