// Every file in the repo's docs/ has to actually be reachable from the built
// site — otherwise a new doc page can be added to docs/ and silently never
// get a route, a link, or a mention in the /docs/ index.
import { readFileSync, readdirSync } from "node:fs";
import { join } from "node:path";
import { distDir, repoRoot, requireDist, fail, report } from "./lib.mjs";

requireDist();

const docsDir = join(repoRoot, "docs");
const slugs = readdirSync(docsDir)
  .filter((name) => name.endsWith(".md"))
  .map((name) => name.replace(/\.md$/, ""));

if (slugs.length === 0) {
  fail(`no markdown files found in ${docsDir}`);
}

const indexHtml = readFileSync(join(distDir, "docs", "index.html"), "utf8");

for (const slug of slugs) {
  const pagePath = join(distDir, "docs", slug, "index.html");
  try {
    readFileSync(pagePath);
  } catch {
    fail(`docs/${slug}.md has no built page at dist/docs/${slug}/index.html`);
    continue;
  }
  if (!indexHtml.includes(`/docs/${slug}/`)) {
    fail(`dist/docs/index.html does not link to /docs/${slug}/`);
  }
}

report("check-docs-coverage");