"""asset_resolver：旧占位符清理与 asset:// 解析。"""

import unittest
from types import SimpleNamespace

from app.features.memoir.asset_resolver import (
    collect_asset_ids_for_chapter,
    collect_asset_ids_from_markdown,
    resolve_asset_refs_in_markdown,
    split_markdown_by_asset_refs,
    strip_legacy_image_placeholders,
)
from app.features.memoir.models import Chapter


class AssetResolverTest(unittest.TestCase):
    def test_strip_legacy_image_placeholders_double_brace(self):
        md = "正文\n\n{{IMAGE:院子里的树}}\n\n结尾"
        out = strip_legacy_image_placeholders(md)
        self.assertNotIn("IMAGE", out)
        self.assertIn("正文", out)
        self.assertIn("结尾", out)

    def test_strip_legacy_image_placeholders_quad_brace(self):
        md = "a\n\n{{{{IMAGE:描述}}}}\n\nb"
        out = strip_legacy_image_placeholders(md)
        self.assertNotIn("IMAGE", out)

    def test_collect_and_split_asset_refs(self):
        md = "前\n\n![图注](asset://abc-123)\n\n后"
        self.assertEqual(collect_asset_ids_from_markdown(md), ["abc-123"])
        blocks = split_markdown_by_asset_refs(md, lambda aid: f"https://x/{aid}")
        self.assertEqual(len(blocks), 3)
        self.assertEqual(blocks[0]["type"], "text")
        self.assertEqual(blocks[1]["type"], "image")
        self.assertIn("https://x/abc-123", blocks[1]["url"])

    def test_resolve_asset_refs_in_markdown(self):
        md = "![c](asset://id1)"
        out = resolve_asset_refs_in_markdown(md, lambda aid: "https://cdn/u")
        self.assertIn("https://cdn/u", out)
        self.assertNotIn("asset://", out)

    def test_collect_asset_ids_for_chapter(self):
        ch = Chapter(
            id="c1",
            user_id="u1",
            title="t",
            order_index=0,
            canonical_markdown="![x](asset://a1)",
            cover_asset_id="cov1",
        )
        ids = collect_asset_ids_for_chapter(ch)
        self.assertEqual(ids, {"a1", "cov1"})

    def test_collect_asset_ids_includes_linked_story_markdown(self):
        ch = SimpleNamespace(
            canonical_markdown="",
            sections=[],
            cover_asset_id=None,
            story_links=[
                SimpleNamespace(
                    story=SimpleNamespace(
                        canonical_markdown="![主图](asset://from-story-1)"
                    )
                )
            ],
        )
        ids = collect_asset_ids_for_chapter(ch)
        self.assertEqual(ids, {"from-story-1"})


if __name__ == "__main__":
    unittest.main()