"""Tests for codex.sources.crossref."""

from __future__ import annotations

import httpx
import pytest

from codex.sources import crossref


def test_fetch_abstract_strips_jats(monkeypatch: pytest.MonkeyPatch) -> None:
    """A JATS-tagged abstract is returned as plain text with tags removed."""
    body = {
        "message": {
            "abstract": "<jats:p>We prove a <jats:italic>theorem</jats:italic> about "
            "polyhedra.</jats:p>"
        }
    }

    def mock_get(url: str, params: dict[str, object] | None = None) -> httpx.Response:
        return httpx.Response(200, json=body)

    monkeypatch.setattr(crossref, "_get", mock_get)

    result = crossref.fetch_abstract("10.1007/s00454-019-00132-8")
    assert result == "We prove a theorem about polyhedra."


def test_fetch_abstract_absent_returns_none(monkeypatch: pytest.MonkeyPatch) -> None:
    """A work with no abstract field (e.g. a book chapter) returns None."""

    def mock_get(url: str, params: dict[str, object] | None = None) -> httpx.Response:
        return httpx.Response(200, json={"message": {"title": ["Some Chapter"]}})

    monkeypatch.setattr(crossref, "_get", mock_get)
    assert crossref.fetch_abstract("10.1007/978-3-642-17413-1_7") is None


def test_fetch_abstract_404_returns_none(monkeypatch: pytest.MonkeyPatch) -> None:
    """A 404 returns None rather than raising."""

    def mock_get(url: str, params: dict[str, object] | None = None) -> httpx.Response:
        raise httpx.HTTPStatusError(
            "404",
            request=httpx.Request("GET", url),
            response=httpx.Response(404, request=httpx.Request("GET", url)),
        )

    monkeypatch.setattr(crossref, "_get", mock_get)
    assert crossref.fetch_abstract("10.0000/nonexistent") is None