import { describe, expect, test } from "bun:test";
import { analyzeMarkdown } from "./markdown.mjs";

describe("analyzeMarkdown", () => {
  test("extracts a linked H1 and falls back to the file path", () => {
    expect(analyzeMarkdown("# [A linked title](https://example.com)", "fallback.md").title).toBe(
      "A linked title",
    );
    expect(analyzeMarkdown("## No H1", "path/to/NOTE.MD").title).toBe("path/to/NOTE");
  });

  test("removes formatting without changing ordinary punctuation", () => {
    const markdown = [
      "# Plain **text**",
      "",
      "foo_bar_baz, `inline_code`, and [a link](https://example.com/a_(b)).",
      "",
      "> quoted *words*",
    ].join("\n");

    expect(analyzeMarkdown(markdown, "fallback.md").textContent).toBe(
      [
        "Plain text",
        "",
        "foo_bar_baz, inline_code, and a link.",
        "",
        "quoted words",
      ].join("\n"),
    );
  });

  test("preserves fenced code literally", () => {
    const markdown = [
      "~~~js",
      "const pipe = left | right;",
      'const markdownLooking = "# **still code**";',
      "~~~",
    ].join("\n");

    expect(analyzeMarkdown(markdown, "code.md").textContent).toBe(
      ['const pipe = left | right;', 'const markdownLooking = "# **still code**";'].join("\n"),
    );
  });

  test("understands GFM tables, task lists, and strikethrough", () => {
    const markdown = [
      "| name | state |",
      "| --- | --- |",
      "| parser | ~~fragile~~ solid |",
      "",
      "- [x] shipped",
    ].join("\n");
    const text = analyzeMarkdown(markdown, "gfm.md").textContent;

    expect(text).toContain("name");
    expect(text).toContain("state");
    expect(text).toContain("parser");
    expect(text).toContain("fragile solid");
    expect(text).toContain("shipped");
    expect(text).not.toContain("|");
    expect(text).not.toContain("[x]");
    expect(text).not.toContain("~~");
  });

  test("drops YAML and TOML front matter with either line ending", () => {
    for (const markdown of [
      "---\ntitle: metadata\n---\n\n# Visible",
      "---\r\ntitle: metadata\r\n---\r\n\r\n# Visible",
      "+++\ntitle = 'metadata'\n+++\n\n# Visible",
    ]) {
      expect(analyzeMarkdown(markdown, "fallback.md")).toEqual({
        title: "Visible",
        textContent: "Visible",
      });
    }
  });
});