"""Tests for the library map injected into every chat."""
import time
from unittest import mock

import pytest

from modules.ai import context


@pytest.mark.asyncio
async def test_build_library_context(async_client, test_session, video_factory, archive_factory,
                                     test_zim, food_inventory_factory, tag_factory):
    """The map carries today's date, counts, and exact names."""
    from wrolpi.collections.models import Collection
    test_session.add(Collection(name='Talking Sasquach', kind='channel'))
    await tag_factory('Food Preservation')
    video_factory(title='a video')
    archive_factory(domain='example.com', title='a page', contents='contents')
    food_inventory_factory(name='Pantry')
    test_session.commit()

    text = context.build_library_context()
    assert 'Today is' in text
    assert '1 videos, 1 archived web pages' in text
    assert 'Talking Sasquach' in text
    assert 'example.com' in text
    assert 'WROLPi example ZIM' in text
    assert 'Pantry' in text
    assert 'Tags (1): Food Preservation' in text
    assert 'user spellings may differ' in text


@pytest.mark.asyncio
async def test_library_context_caps_names(async_client, test_session, archive_factory):
    """A huge library lists at most MAX_NAMES names per category, plus a count of the rest."""
    for i in range(context.MAX_NAMES + 5):
        archive_factory(domain=f'site{i:02}.com', title=f'page {i}', contents='x')
    test_session.commit()

    text = context.build_library_context()
    assert f'Archived websites ({context.MAX_NAMES + 5}):' in text
    assert 'and 5 more' in text
    listed = [i for i in range(context.MAX_NAMES + 5) if f'site{i:02}.com' in text]
    assert len(listed) == context.MAX_NAMES


@pytest.mark.asyncio
async def test_library_context_cache_and_degradation(async_client, test_session):
    """The map is cached briefly; a build failure serves the stale copy rather than crashing chat."""
    context._cache.update(text=None, expires=0.0)
    first = context.get_library_context()
    assert first and 'Today is' in first

    with mock.patch('modules.ai.context.build_library_context', side_effect=RuntimeError('db down')) as build:
        # Cached: the builder is not called.
        assert context.get_library_context() == first
        build.assert_not_called()

        # Expired + failing builder: the stale copy is served.
        context._cache['expires'] = time.time() - 1
        assert context.get_library_context() == first
        build.assert_called_once()