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# 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
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

from contextlib import nullcontext
from datetime import datetime, timedelta
from typing import Any, TYPE_CHECKING
from uuid import UUID

import pytest
from flask.ctx import AppContext
from freezegun import freeze_time

from superset.key_value.exceptions import KeyValueCodecEncodeException
from superset.key_value.types import (
    JsonKeyValueCodec,
    KeyValueCodec,
    PickleKeyValueCodec,
)

if TYPE_CHECKING:
    from superset.extensions.metastore_cache import SupersetMetastoreCache

NAMESPACE = UUID("ee173d1b-ccf3-40aa-941c-985c15224496")

FIRST_KEY = "foo"
FIRST_KEY_INITIAL_VALUE = {"foo": "bar"}
FIRST_KEY_UPDATED_VALUE = "foo"

SECOND_KEY = "baz"
SECOND_VALUE = "qwerty"


@pytest.fixture
def cache() -> SupersetMetastoreCache:
    from superset.extensions.metastore_cache import SupersetMetastoreCache

    return SupersetMetastoreCache(
        namespace=NAMESPACE,
        default_timeout=600,
        codec=PickleKeyValueCodec(),
    )


def test_caching_flow(app_context: AppContext, cache: SupersetMetastoreCache) -> None:
    assert cache.has(FIRST_KEY) is False
    assert cache.add(FIRST_KEY, FIRST_KEY_INITIAL_VALUE) is True
    assert cache.has(FIRST_KEY) is True
    cache.set(SECOND_KEY, SECOND_VALUE)
    assert cache.get(FIRST_KEY) == FIRST_KEY_INITIAL_VALUE
    assert cache.get(SECOND_KEY) == SECOND_VALUE
    assert cache.add(FIRST_KEY, FIRST_KEY_UPDATED_VALUE) is False
    assert cache.get(FIRST_KEY) == FIRST_KEY_INITIAL_VALUE
    assert cache.set(FIRST_KEY, FIRST_KEY_UPDATED_VALUE) == True
    assert cache.get(FIRST_KEY) == FIRST_KEY_UPDATED_VALUE
    cache.delete(FIRST_KEY)
    assert cache.has(FIRST_KEY) is False
    assert cache.get(FIRST_KEY) is None
    assert cache.has(SECOND_KEY)
    assert cache.get(SECOND_KEY) == SECOND_VALUE


def test_expiry(app_context: AppContext, cache: SupersetMetastoreCache) -> None:
    delta = timedelta(days=90)
    dttm = datetime(2022, 3, 18, 0, 0, 0)
    with freeze_time(dttm):
        cache.set(FIRST_KEY, FIRST_KEY_INITIAL_VALUE, int(delta.total_seconds()))
        assert cache.get(FIRST_KEY) == FIRST_KEY_INITIAL_VALUE
    with freeze_time(dttm + delta - timedelta(seconds=1)):
        assert cache.has(FIRST_KEY)
        assert cache.get(FIRST_KEY) == FIRST_KEY_INITIAL_VALUE
    with freeze_time(dttm + delta + timedelta(seconds=1)):
        assert cache.has(FIRST_KEY) is False
        assert cache.get(FIRST_KEY) is None


@pytest.mark.parametrize(
    "input_,codec,expected_result",
    [
        ({"foo": "bar"}, JsonKeyValueCodec(), {"foo": "bar"}),
        (("foo", "bar"), JsonKeyValueCodec(), ["foo", "bar"]),
        (complex(1, 1), JsonKeyValueCodec(), KeyValueCodecEncodeException()),
        ({"foo": "bar"}, PickleKeyValueCodec(), {"foo": "bar"}),
        (("foo", "bar"), PickleKeyValueCodec(), ("foo", "bar")),
        (complex(1, 1), PickleKeyValueCodec(), complex(1, 1)),
    ],
)
def test_codec(
    input_: Any,
    codec: KeyValueCodec,
    expected_result: Any,
    app_context: AppContext,
) -> None:
    from superset.extensions.metastore_cache import SupersetMetastoreCache

    cache = SupersetMetastoreCache(
        namespace=NAMESPACE,
        default_timeout=600,
        codec=codec,
    )
    cm = (
        pytest.raises(type(expected_result))
        if isinstance(expected_result, Exception)
        else nullcontext()
    )
    with cm:
        cache.set(FIRST_KEY, input_)
        assert cache.get(FIRST_KEY) == expected_result