"""Tests for scheduled cleanup functionality."""

import time


class TestScheduledCleanup:
    """Tests for scheduled cleanup in before_request hook."""

    def test_cleanup_times_reset(self, app, client):
        """Verify cleanup times can be reset for testing."""
        from app.api import _cleanup_times, reset_cleanup_times

        # Set some cleanup times
        with app.app_context():
            reset_cleanup_times()
            for key in _cleanup_times:
                assert _cleanup_times[key] == 0

    def test_cleanup_runs_on_request(self, app, client, auth_header):
        """Verify cleanup runs during request handling."""
        from app.api import _cleanup_times, reset_cleanup_times

        with app.app_context():
            reset_cleanup_times()

        # Make a request to trigger cleanup
        client.get("/health")

        # Cleanup times should be set
        with app.app_context():
            for key in _cleanup_times:
                assert _cleanup_times[key] > 0

    def test_cleanup_respects_intervals(self, app, client):
        """Verify cleanup respects configured intervals."""
        from app.api import _cleanup_times, reset_cleanup_times

        with app.app_context():
            reset_cleanup_times()

        # First request triggers cleanup
        client.get("/health")

        with app.app_context():
            first_times = {k: v for k, v in _cleanup_times.items()}

        # Immediate second request should not reset times
        client.get("/health")

        with app.app_context():
            for key in _cleanup_times:
                assert _cleanup_times[key] == first_times[key]

    def test_expired_paste_cleanup(self, app, client, auth_header):
        """Test that expired pastes are cleaned up."""
        import json

        from app.database import get_db

        # Create paste with short expiry
        response = client.post(
            "/",
            data="test content",
            content_type="text/plain",
            headers={**auth_header, "X-Expiry": "2"},  # 2 seconds
        )
        assert response.status_code == 201
        paste_id = json.loads(response.data)["id"]

        # Wait for expiry (extra buffer for CI timing)
        time.sleep(3)

        # Trigger cleanup via database function
        with app.app_context():
            from app.database import cleanup_expired_pastes

            count = cleanup_expired_pastes()
            # At least our paste should be cleaned up
            assert count >= 1, f"Expected cleanup to remove at least 1 paste, got {count}"

            # Verify paste is gone
            db = get_db()
            row = db.execute("SELECT id FROM pastes WHERE id = ?", (paste_id,)).fetchone()
            assert row is None, f"Paste {paste_id} should have been deleted"

    def test_rate_limit_cleanup(self, app, client):
        """Test that rate limit entries are cleaned up."""
        from app.api.routes import (
            _rate_limit_requests,
            check_rate_limit,
            cleanup_rate_limits,
            reset_rate_limits,
        )

        with app.app_context():
            reset_rate_limits()

            # Add some rate limit entries
            check_rate_limit("192.168.1.1", authenticated=False)
            check_rate_limit("192.168.1.2", authenticated=False)

            assert len(_rate_limit_requests) == 2

            # Cleanup with very large window (nothing should be removed)
            count = cleanup_rate_limits(window=3600)
            assert count == 0

            # Wait a bit and cleanup with tiny window
            time.sleep(0.1)
            count = cleanup_rate_limits(window=0)  # Immediate cleanup
            assert count == 2
            assert len(_rate_limit_requests) == 0


class TestCleanupThreadSafety:
    """Tests for thread-safety of cleanup operations."""

    def test_cleanup_lock_exists(self, app):
        """Verify cleanup lock exists."""
        import threading

        from app.api import _cleanup_lock

        assert isinstance(_cleanup_lock, type(threading.Lock()))

    def test_concurrent_cleanup_access(self, app, client):
        """Test that concurrent requests don't corrupt cleanup state."""
        import threading

        from app.api import reset_cleanup_times

        with app.app_context():
            reset_cleanup_times()

        errors = []
        results = []

        def make_request():
            try:
                resp = client.get("/health")
                results.append(resp.status_code)
            except Exception as e:
                errors.append(str(e))

        # Simulate concurrent requests
        threads = [threading.Thread(target=make_request) for _ in range(10)]
        for t in threads:
            t.start()
        for t in threads:
            t.join()

        assert not errors
        assert all(r == 200 for r in results)


class TestCleanupConfiguration:
    """Tests for cleanup configuration."""

    def test_cleanup_intervals_configured(self, app):
        """Verify cleanup intervals are properly configured."""
        from app.api import _CLEANUP_INTERVALS

        assert "pastes" in _CLEANUP_INTERVALS
        assert "hashes" in _CLEANUP_INTERVALS
        assert "rate_limits" in _CLEANUP_INTERVALS

        # Verify reasonable intervals
        assert _CLEANUP_INTERVALS["pastes"] >= 60  # At least 1 minute
        assert _CLEANUP_INTERVALS["hashes"] >= 60
        assert _CLEANUP_INTERVALS["rate_limits"] >= 60