"""
Unit tests for the /stats endpoint (offline, all clients mocked).

Covers the wiki page count fix: the endpoint must count pages under the
user namespace ("users/{user}"), not pass the bare user name as prefix
(which matched nothing and always reported 0 pages).
"""

from unittest.mock import AsyncMock, MagicMock

import pytest

from src.main import stats


@pytest.fixture
def neo4j_client():
    neo4j = MagicMock()
    neo4j.execute_query = AsyncMock(return_value=[{"count": 5}])
    return neo4j


@pytest.fixture
def qdrant_client():
    qdrant = MagicMock()
    qdrant.list_collections = AsyncMock(return_value=[
        {"name": "user_jp", "vectors_count": 42}
    ])
    return qdrant


@pytest.fixture
def wikijs_client():
    wikijs = MagicMock()
    wikijs.list_all_pages = AsyncMock(return_value=[
        {"id": i, "path": f"users/jpmschweitzer/p{i}"} for i in range(138)
    ])
    return wikijs


@pytest.fixture
def paperless_client():
    paperless = MagicMock()
    paperless.list_documents = AsyncMock(return_value={"count": 3})
    paperless.list_tags = AsyncMock(return_value=[])
    paperless.list_correspondents = AsyncMock(return_value=[])
    paperless.list_document_types = AsyncMock(return_value=[])
    return paperless


@pytest.mark.unit
class TestStatsWikiPageCount:
    """/stats must scope the wiki page count to the user namespace."""

    async def test_uses_user_namespace_path_prefix(
        self, neo4j_client, qdrant_client, wikijs_client, paperless_client
    ):
        await stats(
            user="jpmschweitzer",
            neo4j=neo4j_client,
            qdrant=qdrant_client,
            wikijs=wikijs_client,
            paperless=paperless_client,
            api_key="test-key",
        )

        wikijs_client.list_all_pages.assert_awaited_once_with(
            path_prefix="users/jpmschweitzer"
        )

    async def test_reports_page_count(
        self, neo4j_client, qdrant_client, wikijs_client, paperless_client
    ):
        response = await stats(
            user="jpmschweitzer",
            neo4j=neo4j_client,
            qdrant=qdrant_client,
            wikijs=wikijs_client,
            paperless=paperless_client,
            api_key="test-key",
        )

        assert response.wiki_pages == 138

    async def test_wiki_failure_degrades_to_zero(
        self, neo4j_client, qdrant_client, wikijs_client, paperless_client
    ):
        wikijs_client.list_all_pages = AsyncMock(side_effect=RuntimeError("wiki down"))

        response = await stats(
            user="jpmschweitzer",
            neo4j=neo4j_client,
            qdrant=qdrant_client,
            wikijs=wikijs_client,
            paperless=paperless_client,
            api_key="test-key",
        )

        assert response.wiki_pages == 0