# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# 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.

import pytest

from superset.utils.slack import get_channels_with_search


class MockResponse:
    def __init__(self, data):
        self._data = data

    @property
    def data(self):
        return self._data


class TestGetChannelsWithSearch:
    # Fetch all channels when no search string is provided
    def test_fetch_all_channels_no_search_string(self, mocker):
        # Mock data
        mock_data = {
            "channels": [{"name": "general", "id": "C12345"}],
            "response_metadata": {"next_cursor": None},
        }

        # Mock class instance with data property
        mock_response_instance = MockResponse(mock_data)

        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search()
        assert result == [{"name": "general", "id": "C12345"}]

    # Handle an empty search string gracefully
    def test_handle_empty_search_string(self, mocker):
        mock_data = {
            "channels": [{"name": "general", "id": "C12345"}],
            "response_metadata": {"next_cursor": None},
        }

        mock_response_instance = MockResponse(mock_data)
        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search(search_string="")
        assert result == [{"name": "general", "id": "C12345"}]

    def test_handle_exact_match_search_string_single_channel(self, mocker):
        # Mock data with multiple channels
        mock_data = {
            "channels": [
                {"name": "general", "id": "C12345"},
                {"name": "general2", "id": "C13454"},
                {"name": "random", "id": "C67890"},
            ],
            "response_metadata": {"next_cursor": None},
        }

        # Mock response and client setup
        mock_response_instance = MockResponse(mock_data)
        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        # Call the function with a search string that matches a single channel
        result = get_channels_with_search(search_string="general", exact_match=True)

        # Assert that the result is a list with a single channel dictionary
        assert result == [{"name": "general", "id": "C12345"}]

    def test_handle_exact_match_search_string_multiple_channels(self, mocker):
        mock_data = {
            "channels": [
                {"name": "general", "id": "C12345"},
                {"name": "general2", "id": "C13454"},
                {"name": "random", "id": "C67890"},
            ],
            "response_metadata": {"next_cursor": None},
        }

        mock_response_instance = MockResponse(mock_data)
        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search(
            search_string="general,random", exact_match=True
        )
        assert result == [
            {"name": "general", "id": "C12345"},
            {"name": "random", "id": "C67890"},
        ]

    def test_handle_loose_match_search_string_multiple_channels(self, mocker):
        mock_data = {
            "channels": [
                {"name": "general", "id": "C12345"},
                {"name": "general2", "id": "C13454"},
                {"name": "random", "id": "C67890"},
            ],
            "response_metadata": {"next_cursor": None},
        }

        mock_response_instance = MockResponse(mock_data)
        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search(search_string="general,random")
        assert result == [
            {"name": "general", "id": "C12345"},
            {"name": "general2", "id": "C13454"},
            {"name": "random", "id": "C67890"},
        ]

    def test_handle_slack_client_error_listing_channels(self, mocker):
        from slack_sdk.errors import SlackApiError

        from superset.exceptions import SupersetException

        mock_client = mocker.Mock()
        mock_client.conversations_list.side_effect = SlackApiError(
            "foo", "missing scope: channels:read"
        )
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        with pytest.raises(SupersetException) as ex:
            get_channels_with_search()

        assert str(ex.value) == (
            """Failed to list channels: foo
The server responded with: missing scope: channels:read"""
        )

    def test_filter_channels_by_specified_types(self, mocker):
        mock_data = {
            "channels": [
                {"name": "general", "id": "C12345", "type": "public"},
            ],
            "response_metadata": {"next_cursor": None},
        }

        mock_response_instance = MockResponse(mock_data)
        mock_client = mocker.Mock()
        mock_client.conversations_list.return_value = mock_response_instance
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search(types=["public"])
        assert result == [{"name": "general", "id": "C12345", "type": "public"}]

    def test_handle_pagination_multiple_pages(self, mocker):
        mock_data_page1 = {
            "channels": [{"name": "general", "id": "C12345"}],
            "response_metadata": {"next_cursor": "page2"},
        }
        mock_data_page2 = {
            "channels": [{"name": "random", "id": "C67890"}],
            "response_metadata": {"next_cursor": None},
        }

        mock_response_instance_page1 = MockResponse(mock_data_page1)
        mock_response_instance_page2 = MockResponse(mock_data_page2)

        mock_client = mocker.Mock()
        mock_client.conversations_list.side_effect = [
            mock_response_instance_page1,
            mock_response_instance_page2,
        ]
        mocker.patch("superset.utils.slack.get_slack_client", return_value=mock_client)

        result = get_channels_with_search()
        assert result == [
            {"name": "general", "id": "C12345"},
            {"name": "random", "id": "C67890"},
        ]