/**
 * Tests for `card.ts` — the compact card renderer. Focused on the annotation
 * line: it must sit directly under the header (the always-rendered card
 * surface) and leave the card untouched when absent.
 */

import { describe, expect, test } from "bun:test";

import { renderCard } from "../card.js";

const PAGE = `---
title: Page A
---

Lead paragraph for page a.

## Alpha

Body text.
`;

describe("renderCard — annotation line", () => {
  test("renders the annotation directly under the header, before the head", () => {
    const card = renderCard(
      "page-a",
      PAGE,
      "[lane: fresh · dated 2026-06-10 14:23 UTC]",
    );
    expect(
      card.startsWith(
        "# memory/concepts/page-a.md\n[lane: fresh · dated 2026-06-10 14:23 UTC]\nLead paragraph for page a.",
      ),
    ).toBe(true);
    expect(card).toContain("[sections: §Alpha]");
  });

  test("an absent or empty annotation leaves the card unchanged", () => {
    const bare = renderCard("page-a", PAGE);
    expect(renderCard("page-a", PAGE, "")).toBe(bare);
    expect(bare).not.toContain("[lane:");
    expect(
      bare.startsWith(
        "# memory/concepts/page-a.md\nLead paragraph for page a.",
      ),
    ).toBe(true);
  });

  test("renders a `current:` frontmatter line first, before the lane annotation", () => {
    const page = `---
title: Page A
current: "bridge check owed before thursday's dry-run (as of jun 10)"
---

Lead paragraph for page a.
`;
    const card = renderCard("page-a", page, "[lane: fresh]");
    expect(
      card.startsWith(
        "# memory/concepts/page-a.md\n[current: bridge check owed before thursday's dry-run (as of jun 10)]\n[lane: fresh]\nLead paragraph for page a.",
      ),
    ).toBe(true);
  });

  test("collapses whitespace and caps a runaway `current:` value", () => {
    const long = `a  line  with   breaks ${"x".repeat(400)}`;
    const card = renderCard(
      "page-a",
      `---\ncurrent: "${long}"\n---\n\nLead.\n`,
    );
    const line = card.split("\n")[1]!;
    expect(line.startsWith("[current: a line with breaks x")).toBe(true);
    expect(line.endsWith("…]")).toBe(true);
    expect(line.length).toBeLessThan(300);
  });

  test("the `status:` draft marker does NOT render as a card line", () => {
    const card = renderCard("page-a", `---\nstatus: cc-draft\n---\n\nLead.\n`);
    expect(card).not.toContain("cc-draft");
    expect(card).not.toContain("[current:");
  });

  test("annotates a page with no head section without a dangling blank line", () => {
    const card = renderCard(
      "page-b",
      "## Only Section\n\nBody.",
      "[lane: core]",
    );
    expect(card.startsWith("# memory/concepts/page-b.md\n[lane: core]")).toBe(
      true,
    );
  });
});