"""RSS/Atom parsing, including the RDF format the old system could not read."""

import httpx
import pytest

from news.sources import rss

RDF = """<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns="http://purl.org/rss/1.0/">
  <channel rdf:about="http://x"><title>T</title><link>http://x</link>
    <description>d</description></channel>
  <item rdf:about="http://x/1">
    <title>German economy frets about election result</title>
    <link>http://x/1?utm_source=rss</link>
    <description>Some &lt;b&gt;markup&lt;/b&gt; here</description>
  </item>
</rdf:RDF>"""

ATOM = """<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title>F</title>
  <entry>
    <title>Release v1.2.3</title>
    <link rel="alternate" href="http://x/rel"/>
    <link rel="self" href="http://x/self"/>
    <updated>2026-09-08T12:00:00Z</updated>
  </entry>
</feed>"""


def _source():
    return {"id": "s1", "url": "http://feed", "kind": "rss"}


async def _fetch(body: str, status: int = 200, headers: dict | None = None):
    def handler(request):
        return httpx.Response(status, content=body.encode(), headers=headers or {})

    transport = httpx.MockTransport(handler)
    async with httpx.AsyncClient(transport=transport) as client:
        return await rss.fetch(client, _source())


@pytest.mark.asyncio
async def test_parses_rss_1_rdf():
    """DW ships RDF; the old hand-rolled parser yielded zero items silently."""
    items, _ = await _fetch(RDF)
    assert len(items) == 1
    assert items[0]["title"].startswith("German economy")
    # tracking parameter stripped, markup removed from the summary
    assert items[0]["canonical_url"] == "http://x/1"
    assert "<b>" not in items[0]["summary"] and "markup" in items[0]["summary"]


@pytest.mark.asyncio
async def test_atom_prefers_alternate_link_over_self():
    items, _ = await _fetch(ATOM)
    assert len(items) == 1
    assert items[0]["canonical_url"] == "http://x/rel"


@pytest.mark.asyncio
async def test_304_returns_no_items_and_is_not_an_error():
    items, state = await _fetch("", status=304)
    assert items == [] and state["status"] == "304"


@pytest.mark.asyncio
async def test_429_is_reported_as_rate_limited_not_raised():
    """Reddit 429s readily; that must back off, not raise every cycle."""
    items, state = await _fetch("", status=429, headers={"retry-after": "120"})
    assert items == []
    assert state["rate_limited"] is True
    assert state["retry_after"] == "120"


@pytest.mark.asyncio
async def test_server_error_still_raises():
    with pytest.raises(httpx.HTTPStatusError):
        await _fetch("", status=503)