"""Environment configuration tests."""
from __future__ import annotations

import os
import unittest
from unittest.mock import patch

from kca.config import Settings


class OcspExpirySettingsTest(unittest.TestCase):
    def test_defaults(self) -> None:
        with patch.dict(os.environ, {}, clear=True):
            settings = Settings.from_env()
        self.assertEqual(30, settings.ocsp_heartbeat_interval_seconds)
        self.assertEqual(60, settings.ocsp_redis_expiry_seconds)

    def test_expiry_must_exceed_heartbeat(self) -> None:
        with patch.dict(
            os.environ,
            {
                "KCA_OCSP_HEARTBEAT_INTERVAL_SECONDS": "30",
                "KCA_OCSP_REDIS_EXPIRY_SECONDS": "30",
            },
            clear=True,
        ):
            with self.assertRaisesRegex(RuntimeError, "must be greater"):
                Settings.from_env()


class OcspRedisSettingsTest(unittest.TestCase):
    def test_defaults_to_disabled(self) -> None:
        with patch.dict(os.environ, {}, clear=True):
            settings = Settings.from_env()
        self.assertIsNone(settings.redis_url)
        self.assertIsNone(settings.ocsp_redis_url)
        self.assertIsNone(settings.ocsp_effective_redis_url)

    def test_falls_back_to_session_redis(self) -> None:
        with patch.dict(
            os.environ, {"REDIS_URL": "redis://sessions:6379/0"}, clear=True
        ):
            settings = Settings.from_env()
        self.assertEqual(
            "redis://sessions:6379/0", settings.ocsp_effective_redis_url
        )

    def test_uses_dedicated_ocsp_redis(self) -> None:
        with patch.dict(
            os.environ,
            {
                "REDIS_URL": "redis://sessions:6379/0",
                "KCA_OCSP_REDIS_URL": "redis://ocsp:6379/0",
            },
            clear=True,
        ):
            settings = Settings.from_env()
        self.assertEqual("redis://sessions:6379/0", settings.redis_url)
        self.assertEqual("redis://ocsp:6379/0", settings.ocsp_effective_redis_url)

    def test_dedicated_ocsp_redis_without_session_redis(self) -> None:
        with patch.dict(
            os.environ, {"KCA_OCSP_REDIS_URL": "redis://ocsp:6379/0"}, clear=True
        ):
            settings = Settings.from_env()
        self.assertIsNone(settings.redis_url)
        self.assertEqual("redis://ocsp:6379/0", settings.ocsp_effective_redis_url)


if __name__ == "__main__":
    unittest.main()