from datetime import UTC, datetime

from app.services.earth_news import ParsedNewsItem, _serialize_item


def test_serialize_item_includes_region_anchor_for_cruise():
    item = ParsedNewsItem(
        id="google-apac:test",
        title="Example APAC story",
        summary="Example summary",
        url="https://example.com/story",
        source="Example Source",
        feed_name="Global Monitor / APAC",
        feed_region="asia-pacific",
        homepage_url="https://example.com",
        published_at=datetime(2026, 4, 23, 2, 30, tzinfo=UTC),
    )

    payload = _serialize_item(item, active_region="asia-pacific")

    assert payload["latitude"] == 1.3521
    assert payload["longitude"] == 103.8198
    assert payload["location_label"] == "亚太"
    assert payload["location_inferred"] is True
    assert payload["is_focus_match"] is True
    assert payload["published_at"] == "2026-04-23T02:30:00Z"


def test_serialize_item_falls_back_to_global_anchor():
    item = ParsedNewsItem(
        id="custom:test",
        title="Fallback story",
        summary="Fallback summary",
        url="https://example.com/fallback",
        source="Fallback Source",
        feed_name="Fallback Feed",
        feed_region="unknown-region",
        homepage_url="https://example.com",
        published_at=None,
    )

    payload = _serialize_item(item, active_region="americas")

    assert payload["latitude"] == 20.0
    assert payload["longitude"] == 0.0
    assert payload["location_label"] == "全球"
    assert payload["location_inferred"] is True
    assert payload["is_focus_match"] is False
    assert payload["published_at"] is None