"""Tests for cache management API endpoints."""

from unittest.mock import AsyncMock, MagicMock, patch

import pytest
from fastapi.testclient import TestClient


@pytest.fixture
def mock_user():
    """Create a mock user for auth dependency override."""
    from app.core import models

    user = MagicMock(spec=models.User)
    user.id = 1
    return user


@pytest.fixture
def client(mock_user):
    """Test client with auth dependency overridden."""
    from app.main import app
    from app.routers.auth import get_current_user

    # Override auth to return mock user
    def _override_user():
        return mock_user

    app.dependency_overrides[get_current_user] = _override_user
    yield TestClient(app)
    app.dependency_overrides.pop(get_current_user, None)


@pytest.fixture
def mock_cache_health_ok():
    """Patch get_cache().get_cache_health to return healthy status."""
    with patch("app.routers.cache.get_cache") as mock_get_cache:
        mock_cache = MagicMock()
        # Methods called with await need to be AsyncMock
        mock_cache.get_cache_health = AsyncMock()
        mock_cache.get_cache_health.return_value = {
            "status": "ok",
            "keys_tracked": 5,
            "ttl_seconds": 300,
        }
        mock_cache.invalidate_user_cache = AsyncMock()
        mock_cache.invalidate_user_cache.return_value = 3
        mock_get_cache.return_value = mock_cache
        yield mock_cache


@pytest.fixture
def mock_cache_degraded():
    """Patch get_cache().get_cache_health to return degraded status."""
    with patch("app.routers.cache.get_cache") as mock_get_cache:
        mock_cache = MagicMock()
        mock_cache.get_cache_health = AsyncMock()
        mock_cache.get_cache_health.return_value = {
            "status": "degraded",
            "keys_tracked": 0,
            "ttl_seconds": 300,
        }
        mock_cache.invalidate_user_cache = AsyncMock()
        mock_cache.invalidate_user_cache.return_value = 0
        mock_get_cache.return_value = mock_cache
        yield mock_cache


class TestCacheInvalidateEndpoint:
    """Tests for POST /api/v1/cache/invalidate."""

    def test_invalidate_returns_ok(self, client, mock_cache_health_ok):
        """Invalidate should return 200 with keys_cleared count."""
        response = client.post("/api/v1/cache/invalidate")

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "ok"
        assert data["keys_cleared"] == 3

    def test_invalidate_degraded(self, client, mock_cache_degraded):
        """Invalidate should return degraded status when Redis unavailable."""
        response = client.post("/api/v1/cache/invalidate")

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "degraded"
        assert data["keys_cleared"] == 0

    def test_invalidate_requires_auth(self):
        """Invalidate should return 401 without auth token."""
        from app.main import app

        client = TestClient(app)
        response = client.post(
            "/api/v1/cache/invalidate",
            headers={"Authorization": "Bearer invalid-token"},
        )

        # Should be 401 or 403 when unauthenticated
        assert response.status_code in (401, 403)


class TestCacheHealthEndpoint:
    """Tests for GET /api/v1/cache/health."""

    def test_health_ok(self, client, mock_cache_health_ok):
        """Health endpoint should return cache status."""
        response = client.get("/api/v1/cache/health")

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "ok"
        assert data["keys_tracked"] == 5
        assert data["ttl_seconds"] == 300

    def test_health_degraded(self, client, mock_cache_degraded):
        """Health endpoint should return degraded when Redis unavailable."""
        response = client.get("/api/v1/cache/health")

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "degraded"
        assert data["keys_tracked"] == 0

    def test_health_requires_auth(self):
        """Health endpoint should return 401 without auth token."""
        from app.main import app

        client = TestClient(app)
        response = client.get(
            "/api/v1/cache/health",
            headers={"Authorization": "Bearer invalid-token"},
        )

        assert response.status_code in (401, 403)