"""Tests for the geo cache cleanup background task.

Validates that :func:`~app.tasks.geo_cache_cleanup._run_cleanup_with_resources` correctly
calculates the cutoff timestamp, calls :func:`~app.repositories.geo_cache_repo.delete_stale_entries`,
and logs appropriately based on the number of deleted entries, and that
:func:`~app.tasks.geo_cache_cleanup.register` configures the APScheduler job with the correct
interval and stable job ID.
"""

from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from app.tasks.geo_cache_cleanup import GEO_CLEANUP_INTERVAL, JOB_ID, register

# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------


def _make_app() -> MagicMock:
    """Build a minimal mock ``app`` for geo cache cleanup task tests.

    Returns:
        A :class:`unittest.mock.MagicMock` that mimics ``fastapi.FastAPI``.
    """
    app = MagicMock()
    app.state.scheduler = MagicMock()
    app.state.settings = MagicMock(database_path="/tmp/fake.db")
    app.state.runtime_settings = None
    return app


# ---------------------------------------------------------------------------
# Tests for _run_cleanup
# ---------------------------------------------------------------------------


class TestRunCleanup:
    """Tests for :func:`~app.tasks.geo_cache_cleanup._run_cleanup_with_resources`."""

    @pytest.mark.asyncio
    async def test_run_cleanup_calls_delete_stale_entries(self) -> None:
        """``_run_cleanup_with_resources`` must call ``delete_stale_entries`` with a cutoff date."""
        settings = MagicMock(database_path="/tmp/fake.db")

        with patch(
            "app.tasks.db.task_db",
            MagicMock(
                return_value=AsyncMock(
                    __aenter__=AsyncMock(return_value=MagicMock()),
                    __aexit__=AsyncMock(return_value=False),
                )
            ),
        ), patch(
            "app.tasks.geo_cache_cleanup.geo_cache_repo.delete_stale_entries",
            new_callable=AsyncMock,
            return_value=0,
        ) as mock_delete:
            from app.tasks.geo_cache_cleanup import _run_cleanup_with_resources

            await _run_cleanup_with_resources(settings)

        mock_delete.assert_awaited_once()
        # Verify the cutoff timestamp is in ISO format
        call_args = mock_delete.call_args
        assert call_args is not None
        cutoff_iso = call_args[0][1]  # Second positional arg
        assert isinstance(cutoff_iso, str)
        assert "T" in cutoff_iso and "Z" in cutoff_iso

    @pytest.mark.asyncio
    async def test_run_cleanup_logs_when_entries_deleted(self) -> None:
        """``_run_cleanup_with_resources`` must emit an info log when entries are deleted."""
        settings = MagicMock(database_path="/tmp/fake.db")

        with patch(
            "app.tasks.db.task_db",
            MagicMock(
                return_value=AsyncMock(
                    __aenter__=AsyncMock(return_value=MagicMock()),
                    __aexit__=AsyncMock(return_value=False),
                )
            ),
        ), patch(
            "app.tasks.geo_cache_cleanup.geo_cache_repo.delete_stale_entries",
            new_callable=AsyncMock,
            return_value=42,
        ), patch(
            "app.tasks.geo_cache_cleanup.log"
        ) as mock_log:
            from app.tasks.geo_cache_cleanup import _run_cleanup_with_resources

            await _run_cleanup_with_resources(settings)

        info_calls = [c for c in mock_log.info.call_args_list if c[0][0] == "geo_cache_cleanup_ran"]
        assert len(info_calls) == 1
        assert info_calls[0][1]["deleted"] == 42

    @pytest.mark.asyncio
    async def test_run_cleanup_logs_debug_when_nothing_deleted(self) -> None:
        """``_run_cleanup_with_resources`` must emit a debug log when 0 entries are deleted."""
        settings = MagicMock(database_path="/tmp/fake.db")

        with patch(
            "app.tasks.db.task_db",
            MagicMock(
                return_value=AsyncMock(
                    __aenter__=AsyncMock(return_value=MagicMock()),
                    __aexit__=AsyncMock(return_value=False),
                )
            ),
        ), patch(
            "app.tasks.geo_cache_cleanup.geo_cache_repo.delete_stale_entries",
            new_callable=AsyncMock,
            return_value=0,
        ), patch(
            "app.tasks.geo_cache_cleanup.log"
        ) as mock_log:
            from app.tasks.geo_cache_cleanup import _run_cleanup_with_resources

            await _run_cleanup_with_resources(settings)

        debug_calls = [c for c in mock_log.debug.call_args_list if c[0][0] == "geo_cache_cleanup_ran"]
        assert len(debug_calls) == 1
        assert debug_calls[0][1]["deleted"] == 0


# ---------------------------------------------------------------------------
# Tests for register
# ---------------------------------------------------------------------------


class TestRegister:
    """Tests for :func:`~app.tasks.geo_cache_cleanup.register`."""

    def test_register_adds_interval_job_to_scheduler(self) -> None:
        """``register`` must add a job with an ``"interval"`` trigger."""
        app = _make_app()

        register(app)

        app.state.scheduler.add_job.assert_called_once()
        _, kwargs = app.state.scheduler.add_job.call_args
        assert kwargs["trigger"] == "interval"
        assert kwargs["seconds"] == GEO_CLEANUP_INTERVAL

    def test_register_uses_stable_job_id(self) -> None:
        """``register`` must use the module-level ``JOB_ID`` constant."""
        app = _make_app()

        register(app)

        _, kwargs = app.state.scheduler.add_job.call_args
        assert kwargs["id"] == JOB_ID

    def test_register_sets_replace_existing(self) -> None:
        """``register`` must use ``replace_existing=True`` to avoid duplicate jobs."""
        app = _make_app()

        register(app)

        _, kwargs = app.state.scheduler.add_job.call_args
        assert kwargs["replace_existing"] is True

    def test_register_passes_settings_in_kwargs(self) -> None:
        """The scheduled job must receive settings as kwargs instead of app."""
        app = _make_app()

        register(app)

        _, kwargs = app.state.scheduler.add_job.call_args
        assert "settings" in kwargs["kwargs"]
