import json
from datetime import UTC, datetime

import demistomock as demisto  # noqa: F401
import pytest
from CommonServerPython import DemistoException
from freezegun import freeze_time

BASE_URL = "https://api.zoom.us/v2/"
MAX_RECORDS_PER_PAGE = 300


def util_load_json(path):
    with open(path, encoding="utf-8") as f:
        return json.loads(f.read())


@pytest.mark.parametrize(
    "first_fetch_time, expected_result, expect_error",
    [
        ("3 days", "First fetch timestamp: 2023-03-29 00:00:00", False),
        ("6 months", "First fetch timestamp: 2022-10-02 00:00:00", False),
        (
            "7 months",
            "The First fetch time should fall within the last six months."
            " Please provide a valid date within the last six months.",
            True,
        ),
    ],
)
@freeze_time("2023-04-01 00:00:00")
def test_main(first_fetch_time, expected_result, expect_error, mocker):
    """
    Given:
        - 'first_fetch_time': A string representing the first fetch time to be used in the command.
        - 'expected_result': The expected result of the command function.
        - 'expect_error': A boolean indicating whether an error is expected to be raised.
    When:
        - Running the 'main' function.
    Then:
        If 'expect_error' is True: Checks that a 'DemistoException' is raised with a message that
         matches the 'expected_result'.
        If 'expect_error' is False:
            Checks that the output of the command function matches the 'expected_result'.
            Checks that the 'demisto.results' function was called once with the value 'ok'.
            Checks that the 'demisto.info' function was called with the appropriate output.
    """
    from ZoomEventCollector import main

    params = {
        "url": BASE_URL,
        "credentials": {"identifier": "test_id", "password": "test_secret"},
        "account_id": "test_account",
        "first_fetch": first_fetch_time,
    }
    args = {}
    mocker.patch.object(demisto, "params", return_value=params)
    mocker.patch.object(demisto, "args", return_value=args)

    mocker.patch.object(demisto, "command", return_value="test-module")
    mocker.patch.object(demisto, "results")
    mocker.patch("ZoomEventCollector.Client.get_oauth_token", return_value=("token", None))
    mocker.patch(
        "ZoomEventCollector.Client.search_events",
        return_value={"from": "2023-03-31", "to": "2023-04-01", "page_size": 300, "next_page_token": "", "operation_logs": []},
    )
    mocker_info = mocker.patch.object(demisto, "info")
    mock_return_error = mocker.patch("ZoomEventCollector.return_error")

    if expect_error:
        main()
        assert mock_return_error.called
        mock_return_error.assert_called_with(f"Failed to execute test-module command.\nError:\n{expected_result!s}")
    else:
        main()

        output = mocker_info.call_args[0][0]

        assert output == expected_result
        assert demisto.results.call_count == 1
        assert demisto.results.call_args[0][0] == "ok"
        assert mock_return_error.call_count == 0


@freeze_time("2023-03-30 00:00:00")
def test_fetch_events(mocker):
    """
    Tests the fetch_events function

    Given:
        - first_fetch_time
    When:
        - Running the 'fetch_events' function.
    Then:
        - Validates that the function generates the correct API requests with the expected parameters.
        - Validates that the function returns the expected events and next_run timestamps.
    """
    from ZoomEventCollector import Client, fetch_events

    first_fetch_time = datetime(2023, 3, 1).replace(tzinfo=UTC)

    http_request_mocker = mocker.patch.object(
        Client,
        "error_handled_http_request",
        side_effect=[
            util_load_json("test_data/fetch_events_operationlogs.json").get("fetch_events_month_before"),
            util_load_json("test_data/fetch_events_operationlogs.json").get("fetch_events"),
            util_load_json("test_data/fetch_events_activities.json").get("fetch_events_month_before"),
            util_load_json("test_data/fetch_events_activities.json").get("fetch_events"),
        ],
    )

    mocker.patch("ZoomEventCollector.Client.get_oauth_token", return_value=("token", None))
    mocker.patch.object(Client, "generate_oauth_token")

    client = Client(base_url=BASE_URL)
    next_run, events = fetch_events(client, last_run={}, first_fetch_time=datetime(2023, 2, 1).replace(tzinfo=UTC))

    mock_events = util_load_json("test_data/zoom_fetch_events.json")
    assert http_request_mocker.call_args_list[0][1].get("params") == {"page_size": 300, "from": "2023-02-01", "to": "2023-03-01"}
    assert http_request_mocker.call_args_list[1][1].get("params") == {"page_size": 300, "from": "2023-03-02", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[2][1].get("params") == {"page_size": 300, "from": "2023-02-01", "to": "2023-03-01"}
    assert http_request_mocker.call_args_list[3][1].get("params") == {"page_size": 300, "from": "2023-03-02", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[0][1].get("url_suffix") == "report/operationlogs"
    assert http_request_mocker.call_args_list[2][1].get("url_suffix") == "report/activities"

    assert events == mock_events
    assert next_run == {"activities": "2023-03-29T11:38:50Z", "operationlogs": "2023-03-21T08:22:09Z"}

    # assert no new results when given the last_run:

    mocker.patch.object(
        Client,
        "error_handled_http_request",
        side_effect=[
            util_load_json("test_data/fetch_events_operationlogs.json").get("fetch_events"),
            util_load_json("test_data/fetch_events_activities.json").get("fetch_events"),
        ],
    )

    next_run, events = fetch_events(
        client,
        last_run={"activities": "2023-03-29T11:38:50Z", "operationlogs": "2023-03-21T08:22:09Z"},
        first_fetch_time=first_fetch_time,
    )
    assert events == []
    assert next_run == {"activities": "2023-03-29T11:38:50Z", "operationlogs": "2023-03-21T08:22:09Z"}


@freeze_time("2023-03-30 00:00:00")
def test_fetch_events_with_last_run(mocker):
    """
    Tests the fetch_events function

    Given:
        - last run object
        - the first request returns next_page_token
        *NOTE* The test simulates a situation where next token is returned, in reality there is no reason why
        next_token would be returned if it is not over 300 results
    When:
        - Running the 'fetch_events' function.
    Then:
        - Ensure the events are returned as expected and the pagination is working as expected
    """
    from ZoomEventCollector import Client, fetch_events

    first_fetch_time = datetime(2023, 3, 1).replace(tzinfo=UTC)

    http_request_mocker = mocker.patch.object(
        Client,
        "error_handled_http_request",
        side_effect=[
            util_load_json("test_data/fetch_events_operationlogs.json").get("fetch_events_with_token"),
            util_load_json("test_data/fetch_events_operationlogs.json").get("fetch_events_with_token_next"),
            util_load_json("test_data/fetch_events_activities.json").get("fetch_events_with_token"),
            util_load_json("test_data/fetch_events_activities.json").get("fetch_events_with_token_next"),
        ],
    )

    mocker.patch("ZoomEventCollector.Client.get_oauth_token", return_value=("token", None))
    mocker.patch.object(Client, "generate_oauth_token")

    client = Client(base_url=BASE_URL)
    next_run, events = fetch_events(
        client,
        last_run={"activities": "2023-03-21T08:14:27Z", "operationlogs": "2023-03-20T16:37:58Z"},
        first_fetch_time=first_fetch_time,
    )

    mock_events = util_load_json("test_data/zoom_fetch_events_with_token.json")
    assert http_request_mocker.call_args_list[0][1].get("params") == {"page_size": 300, "from": "2023-03-20", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[1][1].get("params") == {
        "page_size": 300,
        "from": "2023-03-20",
        "to": "2023-03-30",
        "next_page_token": "next_token_operationlogs",
    }
    assert http_request_mocker.call_args_list[2][1].get("params") == {"page_size": 300, "from": "2023-03-21", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[3][1].get("params") == {
        "page_size": 300,
        "from": "2023-03-21",
        "to": "2023-03-30",
        "next_page_token": "next_token_activities",
    }
    assert http_request_mocker.call_args_list[0][1].get("url_suffix") == "report/operationlogs"
    assert http_request_mocker.call_args_list[2][1].get("url_suffix") == "report/activities"

    assert events == mock_events
    assert next_run == {"activities": "2023-03-29T11:38:50Z", "operationlogs": "2023-03-21T08:22:09Z"}


@freeze_time("2023-03-30 00:00:00")
def test_get_events_command(mocker):
    """
    Tests the get-events command function.

        Given:
            - NetBox client and limit of events to fetch
        When:
            - Running the 'get_events' function.
        Then:
            - Checks that the events returned by the 'get_events' function match the expected events.
            - Checks that an exception is raised when the limit exceeds the maximum number of records per page.
    """
    from ZoomEventCollector import Client, get_events

    http_request_mocker = mocker.patch.object(
        Client,
        "error_handled_http_request",
        side_effect=[
            util_load_json("test_data/get_events_operationlogs.json"),
            util_load_json("test_data/get_events_activities.json"),
        ],
    )

    mocker.patch("ZoomEventCollector.Client.get_oauth_token", return_value=("token", None))
    mocker.patch.object(Client, "generate_oauth_token")

    client = Client(base_url=BASE_URL)
    events, results = get_events(client, limit=2, first_fetch_time=datetime(2023, 3, 1).replace(tzinfo=UTC))

    mock_events = util_load_json("test_data/zoom_get_events.json")
    assert http_request_mocker.call_args_list[0][1].get("params") == {"page_size": 2, "from": "2023-03-01", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[1][1].get("params") == {"page_size": 2, "from": "2023-03-01", "to": "2023-03-30"}
    assert http_request_mocker.call_args_list[0][1].get("url_suffix") == "report/operationlogs"
    assert http_request_mocker.call_args_list[1][1].get("url_suffix") == "report/activities"
    assert events == mock_events

    # Test limit > MAX_RECORDS_PER_PAGE
    with pytest.raises(DemistoException) as e:
        get_events(client, limit=MAX_RECORDS_PER_PAGE + 1, first_fetch_time=datetime(2023, 3, 1).replace(tzinfo=UTC))
    assert (
        e.value.message == f"The requested limit ({MAX_RECORDS_PER_PAGE + 1}) exceeds the maximum number of "
        f"records per page ({MAX_RECORDS_PER_PAGE}). Please reduce the limit and try again."
    )


@pytest.mark.parametrize(
    "input_date, expected_output",
    [
        (datetime(2021, 12, 3), datetime(2022, 1, 3)),
        (datetime(2022, 1, 31), datetime(2022, 2, 28)),
        (datetime(2022, 2, 28), datetime(2022, 3, 28)),
        (datetime(2020, 2, 29), datetime(2020, 3, 29)),
    ],
)
def test_get_next_month(input_date: datetime, expected_output: datetime):
    """
    Given -
        input_date: A datetime object representing the input date.
        expected_output: A datetime object representing the date of the next month on the same day.

    When -
        The function get_next_month is called with the input_date.

    Then -
        Validate that the output of get_next_month is equal to expected_output.
    """
    from ZoomEventCollector import get_next_month

    assert get_next_month(input_date) == expected_output