"""Unit coverage for SPEC-013 news digest (NEWS-01..03)."""

import unittest
from unittest.mock import AsyncMock

from fjerkroa_bot.news import NewsFetcher, parse_feed, render_digest

RSS = b"""<?xml version="1.0"?><rss><channel>
<item><title>Game X released</title><link>https://ex.com/x</link></item>
<item><title>Patch Y notes</title><link>https://ex.com/y</link></item>
</channel></rss>"""

ATOM = b"""<?xml version="1.0"?><feed xmlns="http://www.w3.org/2005/Atom">
<entry><title>Atom headline</title><link href="https://ex.com/a"/></entry>
</feed>"""


class TestParse(unittest.TestCase):
    def test_rss(self):
        """NEWS-01: RSS items parsed with title + link."""
        items = parse_feed(RSS, "Src")
        self.assertEqual([i["title"] for i in items], ["Game X released", "Patch Y notes"])
        self.assertEqual(items[0]["link"], "https://ex.com/x")
        self.assertEqual(items[0]["source"], "Src")

    def test_atom(self):
        """NEWS-01: Atom entries parsed with href link."""
        items = parse_feed(ATOM, "A")
        self.assertEqual(items[0]["title"], "Atom headline")
        self.assertEqual(items[0]["link"], "https://ex.com/a")

    def test_malformed_never_raises(self):
        """NEWS-01: garbage XML returns [] without raising."""
        self.assertEqual(parse_feed(b"<not xml", "bad"), [])
        self.assertEqual(parse_feed(b"", "empty"), [])


class TestDigest(unittest.TestCase):
    def test_sanitized_and_capped(self):
        """NEWS-02: headlines sanitized, item count capped."""
        items = [{"title": "@everyone big news \x00", "link": "", "source": "S"} for _ in range(20)]
        digest = render_digest(items, max_items=5)
        self.assertEqual(digest.count("\n"), 4)  # 5 lines
        self.assertNotIn("@everyone", digest)
        self.assertNotIn("\x00", digest)


class TestCollect(unittest.IsolatedAsyncioTestCase):
    async def test_ssrf_skip_and_dedup(self):
        """NEWS-03: guarded feed skipped, dup titles dropped, bad fetch survived."""

        def guard(url):
            return "refused" if "internal" in url else None

        async def fetch(url):
            if "boom" in url:
                raise ValueError("boom")
            return RSS  # same content from two feeds -> dedup

        fetcher = NewsFetcher(guard, fetch)
        feeds = [
            ("https://a.com/feed", "A"),
            ("https://internal/feed", "Internal"),  # SSRF-skipped
            ("https://boom.com/feed", "Boom"),  # fetch fails
            ("https://b.com/feed", "B"),  # same RSS -> dup titles dropped
        ]
        items = await fetcher.collect(feeds, per_feed=5)
        titles = [i["title"] for i in items]
        self.assertEqual(titles, ["Game X released", "Patch Y notes"])  # deduped, internal+boom skipped

    async def test_per_feed_limit(self):
        """NEWS-03: per-feed cap honored."""
        fetcher = NewsFetcher(lambda u: None, AsyncMock(return_value=RSS))
        items = await fetcher.collect([("https://a.com", "A")], per_feed=1)
        self.assertEqual(len(items), 1)