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#
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from contextlib import nullcontext
from enum import Enum
from inspect import isclass
from typing import Any, Optional
from unittest.mock import call, Mock, patch

import pytest

from superset import app
from superset.utils import decorators


class ResponseValues(str, Enum):
    FAIL = "fail"
    WARN = "warn"
    OK = "ok"


def test_debounce() -> None:
    mock = Mock()

    @decorators.debounce()
    def myfunc(arg1: int, arg2: int, kwarg1: str = "abc", kwarg2: int = 2) -> int:
        mock(arg1, kwarg1)
        return arg1 + arg2 + kwarg2

    # should be called only once when arguments don't change
    myfunc(1, 1)
    myfunc(1, 1)
    result = myfunc(1, 1)
    mock.assert_called_once_with(1, "abc")
    assert result == 4

    # kwarg order shouldn't matter
    myfunc(1, 0, kwarg2=2, kwarg1="haha")
    result = myfunc(1, 0, kwarg1="haha", kwarg2=2)
    mock.assert_has_calls([call(1, "abc"), call(1, "haha")])
    assert result == 3


@pytest.mark.parametrize(
    "response_value, expected_exception, expected_result",
    [
        (ResponseValues.OK, None, "custom.prefix.ok"),
        (ResponseValues.FAIL, ValueError, "custom.prefix.error"),
        (ResponseValues.WARN, FileNotFoundError, "custom.prefix.warn"),
    ],
)
def test_statsd_gauge(
    response_value: str, expected_exception: Optional[Exception], expected_result: str
) -> None:
    @decorators.statsd_gauge("custom.prefix")
    def my_func(response: ResponseValues, *args: Any, **kwargs: Any) -> str:
        if response == ResponseValues.FAIL:
            raise ValueError("Error")
        if response == ResponseValues.WARN:
            raise FileNotFoundError("Not found")
        return "OK"

    with patch.object(app.config["STATS_LOGGER"], "gauge") as mock:
        cm = (
            pytest.raises(expected_exception)
            if isclass(expected_exception) and issubclass(expected_exception, Exception)
            else nullcontext()
        )

        with cm:
            my_func(response_value, 1, 2)
            mock.assert_called_once_with(expected_result, 1)