import test from "node:test";
import assert from "node:assert/strict";
import nunjucks from "nunjucks";
import path from "node:path";
import {
  extractTerminalPreview,
  filterTagList,
  isoDate,
  postDate,
  readingTime,
  renderExcerptMarkdown
} from "../src/_filters/index.js";

const includesDir = path.resolve("src/_includes");

function renderFeaturedCard(terminal) {
  const env = new nunjucks.Environment(new nunjucks.FileSystemLoader(includesDir), { autoescape: false });
  env.addFilter("extractTerminalPreview", extractTerminalPreview);
  env.addFilter("filterTagList", filterTagList);
  env.addFilter("isoDate", isoDate);
  env.addFilter("postDate", postDate);
  env.addFilter("readingTime", readingTime);
  env.addFilter("renderExcerptMarkdown", renderExcerptMarkdown);

  const featured = {
    url: "/dispatches/example/",
    date: "2026-10-06",
    data: {
      featured: true,
      terminal,
      tags: ["systems"],
      title: "Example dispatch",
      excerpt: "An example featured dispatch used to verify the terminal preview."
    },
    templateContent: `
      <h1 id="terminal-preview">Terminal preview</h1>
      <p>Inspect the first five lines:</p>
      <pre><code class="language-bash">cat /dispatches/example | head -n 5</code></pre>
      <h1 id="investigation">Investigation</h1>
      <p>The public article begins here.</p>
    `
  };

  return env.render("partials/featured-card.njk", {
    collections: { posts: [featured] }
  });
}

test("Featured terminal preview: renders Markdown output only when terminal frontmatter is true", () => {
  const output = renderFeaturedCard(true);

  assert.match(output, /class="[^"]*terminal-code-box[^"]*"/);
  assert.match(output, /Inspect the first five lines:/);
  assert.match(output, /cat \/dispatches\/example \| head -n 5/);
  assert.doesNotMatch(output, /Terminal preview/);
  assert.doesNotMatch(output, /init_cluster\.sh/);
});

test("Featured terminal preview: does not render when terminal frontmatter is false or absent", () => {
  assert.doesNotMatch(renderFeaturedCard(false), /terminal-code-box/);
  assert.doesNotMatch(renderFeaturedCard(undefined), /terminal-code-box/);
});