import assert from "node:assert/strict";
import { describe, it } from "node:test";
import { markdownToSearchText, searchBook, type BookChapterIndex } from "./bookSearch.ts";

describe("markdownToSearchText", () => {
  it("条目卡指令保留值、剥离标记符号", () => {
    const md = `[entries]
## 安全气囊
@tags 汽车 | 安全 | 主:被动
@summary 气囊需配合安全带使用。
备注 :: 详见召回公告
@source NHTSA 报告 | https://a.gov/x
[/entries]`;
    const text = markdownToSearchText(md);
    assert.ok(text.includes("安全气囊"));
    assert.ok(text.includes("汽车"));
    assert.ok(text.includes("主:被动"));
    assert.ok(text.includes("气囊需配合安全带使用。"));
    assert.ok(text.includes("备注 详见召回公告"));
    assert.ok(text.includes("NHTSA 报告"));
    assert.ok(!text.includes("@tags"));
    assert.ok(!text.includes("@summary"));
    assert.ok(!text.includes("@source"));
    assert.ok(!text.includes("::"));
    assert.ok(!text.includes("[entries"));
    assert.ok(!text.includes("https://a.gov/x"));
  });

  it("锁定的 hide 块整体不可搜，未锁块保留正文", () => {
    const md = `公开段落内容。

[hide login]
登录后可见的秘密
[/hide]

[hide points=10 locked]
积分秘密内容
[/hide]`;
    const text = markdownToSearchText(md);
    assert.ok(text.includes("公开段落内容"));
    assert.ok(text.includes("登录后可见的秘密"));
    assert.ok(!text.includes("积分秘密内容"));
  });

  it("剥离代码围栏与行内 markdown 语法但保留代码与锚文本", () => {
    const md = "见 [官网说明](https://x.com) 与 `const x = 1`，\n\n```ts\ncodeInside();\n```";
    const text = markdownToSearchText(md);
    assert.ok(text.includes("官网说明"));
    assert.ok(!text.includes("https://x.com"));
    assert.ok(text.includes("const x = 1"));
    assert.ok(text.includes("codeInside();"));
    assert.ok(!text.includes("```"));
  });
});

describe("searchBook", () => {
  const chapters: BookChapterIndex[] = [
    { no: 1, title: "第一章", plain: "今天天气很好，适合出门散步。路边有一朵花。" },
    { no: 2, title: "第二章", plain: "第二章没有关键词。" },
    { no: 3, title: "第三章", plain: "再次提到天气，天气真的不错。" },
  ];

  it("按章聚合命中数与片段，大小写不敏感", () => {
    const hits = searchBook(chapters, "天气");
    assert.equal(hits.length, 2);
    assert.deepEqual(
      hits.map((h) => [h.no, h.count]),
      [
        [1, 1],
        [3, 2],
      ]
    );
    assert.equal(hits[1].snippets[0].match, "天气");
    assert.ok(hits[1].snippets[0].after.includes("，天气真的"));
  });

  it("片段最多生成 SNIPPET_LIMIT 个，但 count 为真实总数", () => {
    const cs: BookChapterIndex[] = [{ no: 1, title: "t", plain: "天气 天气 天气 天气" }];
    const hits = searchBook(cs, "天气");
    assert.equal(hits[0].count, 4);
    assert.equal(hits[0].snippets.length, 3);
    assert.deepEqual(hits[0].snippets.map((s) => s.ordinal), [0, 1, 2]);
  });

  it("空关键词返回空", () => {
    assert.deepEqual(searchBook(chapters, "  "), []);
  });

  it("无命中返回空数组", () => {
    assert.deepEqual(searchBook(chapters, "航天飞机"), []);
  });
});