"""封面闸门：canonical 未落库时须用物化正文计数 asset://。"""

from unittest.mock import MagicMock, patch

from app.features.memoir.cover_eligibility import (
    chapter_eligible_for_cover_by_inline_body_image_count,
    chapter_needs_cover_enqueue,
    count_chapter_inline_body_images,
    effective_chapter_markdown_for_cover_gates,
)


def test_effective_markdown_falls_back_to_materialize_when_canonical_empty() -> None:
    ch = MagicMock()
    ch.canonical_markdown = ""
    ch.story_links = [MagicMock()]
    with patch(
        "app.features.memoir.chapter_markdown_compose.materialize_chapter_markdown_from_loaded_chapter",
        return_value="正文\n\n![x](asset://a1)",
    ):
        assert "asset://" in effective_chapter_markdown_for_cover_gates(ch)


def test_count_uses_effective_when_canonical_empty() -> None:
    ch = MagicMock()
    ch.canonical_markdown = ""
    ch.story_links = [MagicMock()]
    with patch(
        "app.features.memoir.chapter_markdown_compose.materialize_chapter_markdown_from_loaded_chapter",
        return_value="![alt](asset://id1)",
    ):
        assert count_chapter_inline_body_images(ch) == 1


def test_eligible_with_explicit_markdown_override() -> None:
    ch = MagicMock()
    ch.canonical_markdown = ""
    assert chapter_eligible_for_cover_by_inline_body_image_count(
        ch, markdown="![a](asset://x)"
    )


def test_needs_cover_enqueue_uses_materialized_body() -> None:
    ch = MagicMock()
    ch.canonical_markdown = ""
    ch.cover_asset_id = None
    ch.story_links = [MagicMock(story=MagicMock())]
    link = ch.story_links[0]
    link.story = MagicMock()
    with patch(
        "app.features.memoir.chapter_markdown_compose.materialize_chapter_markdown_from_loaded_chapter",
        return_value="故事\n\n![a](asset://z)",
    ):
        assert chapter_needs_cover_enqueue(ch) is True