import time
from typing import Generator

import pendulum
import pytest
from starlette.testclient import TestClient

from examples.in_memory.main import app
from fastapi_cache import FastAPICache
from fastapi_cache.backends.inmemory import InMemoryBackend


@pytest.fixture(autouse=True)
def init_cache() -> Generator:
    FastAPICache.init(InMemoryBackend())
    yield
    FastAPICache.reset()


def test_datetime() -> None:
    with TestClient(app) as client:
        response = client.get("/datetime")
        now = response.json().get("now")
        now_ = pendulum.now().replace(microsecond=0)
        assert pendulum.parse(now).replace(microsecond=0) == now_
        response = client.get("/datetime")
        now = response.json().get("now")
        assert pendulum.parse(now).replace(microsecond=0) == now_
        time.sleep(3)
        response = client.get("/datetime")
        now = response.json().get("now")
        now = pendulum.parse(now).replace(microsecond=0)
        assert now != now_
        assert now == pendulum.now().replace(microsecond=0)


def test_date() -> None:
    """Test path function without request or response arguments."""
    with TestClient(app) as client:
        response = client.get("/date")
        assert pendulum.parse(response.json()) == pendulum.today()

        # do it again to test cache
        response = client.get("/date")
        assert pendulum.parse(response.json()) == pendulum.today()

        # now test with cache disabled, as that's a separate code path
        FastAPICache._enable = False
        response = client.get("/date")
        assert pendulum.parse(response.json()) == pendulum.today()
        FastAPICache._enable = True


def test_sync() -> None:
    """Ensure that sync function support works."""
    with TestClient(app) as client:
        response = client.get("/sync-me")
        assert response.json() == 42


def test_cache_response_obj() -> None:
    with TestClient(app) as client:
        cache_response = client.get("cache_response_obj")
        assert cache_response.json() == {"a": 1}
        get_cache_response = client.get("cache_response_obj")
        assert get_cache_response.json() == {"a": 1}
        assert get_cache_response.headers.get("cache-control")
        assert get_cache_response.headers.get("etag")


def test_kwargs() -> None:
    with TestClient(app) as client:
        name = "Jon"
        response = client.get("/kwargs", params={"name": name})
        assert response.json() == {"name": name}


def test_method() -> None:
    with TestClient(app) as client:
        response = client.get("/method")
        assert response.json() == 17