// author: simon-pierre boucher <contact@spboucher.ai>
import { describe, expect, it } from "vitest";
import { htmlToMarkdown } from "./markdown.js";

describe("htmlToMarkdown", () => {
  it("uses ATX headings and dash bullets", () => {
    const md = htmlToMarkdown("<h1>Title</h1><ul><li>a</li><li>b</li></ul>");
    expect(md).toContain("# Title");
    expect(md).toContain("- a");
    expect(md).toContain("- b");
  });

  it("emits fenced code blocks with a language tag", () => {
    const md = htmlToMarkdown('<pre><code class="language-ts">const x = 1;</code></pre>');
    expect(md).toContain("```ts");
    expect(md).toContain("const x = 1;");
  });

  it("converts tables to GFM with a header separator", () => {
    const md = htmlToMarkdown(
      "<table><thead><tr><th>Name</th><th>Age</th></tr></thead><tbody><tr><td>Ada</td><td>36</td></tr></tbody></table>",
    );
    expect(md).toContain("| Name | Age |");
    expect(md).toContain("| --- | --- |");
    expect(md).toContain("| Ada | 36 |");
  });

  it("escapes pipes inside table cells", () => {
    const md = htmlToMarkdown("<table><tr><th>a|b</th></tr><tr><td>c|d</td></tr></table>");
    expect(md).toContain("a\\|b");
    expect(md).toContain("c\\|d");
  });

  it("renders figure + figcaption as image plus italic caption", () => {
    const md = htmlToMarkdown('<figure><img src="https://x/y.png" alt="chart"><figcaption>Fig 1</figcaption></figure>');
    expect(md).toContain("![chart](https://x/y.png)");
    expect(md).toContain("_Fig 1_");
  });

  it("removes heading anchor links", () => {
    const md = htmlToMarkdown('<h2>Sec <a class="headerlink" href="#sec">¶</a></h2>');
    expect(md).toContain("## Sec");
    expect(md).not.toContain("¶");
    expect(md).not.toContain("#sec");
  });

  it("renders definition lists", () => {
    const md = htmlToMarkdown("<dl><dt>Term</dt><dd>Meaning</dd></dl>");
    expect(md).toContain("**Term**");
    expect(md).toContain(": Meaning");
  });

  it("collapses 3+ blank lines to 2", () => {
    const md = htmlToMarkdown("<p>a</p><br><br><br><p>b</p>");
    expect(md).not.toMatch(/\n{3,}/);
  });
});