const fs = require("fs");

function read(path) {
  return fs.readFileSync(path, "utf8");
}

function assert(condition, message) {
  if (!condition) throw new Error(message);
}

const robots = read("robots.txt");
const sitemap = read("sitemap.xml");
const index = read("html/index.html");
const article = read("html/mianfei.html");
const commonUtil = read("utils/CommonUtil.js");

assert(!robots.includes("3d.3dyjs.cn"), "robots should not reference the old domain");
assert(!sitemap.includes("3d.3dyjs.cn"), "sitemap should not reference the old domain");
assert(
  robots.includes("Sitemap: https://www.scs8888.cn/sitemap.xml"),
  "robots should advertise the production sitemap",
);

const sitemapLocations = Array.from(sitemap.matchAll(/<loc>([^<]+)<\/loc>/g), (match) => match[1]);
assert(sitemapLocations.length === 1, "static sitemap should contain only the confirmed homepage");
assert(
  sitemapLocations[0] === "https://www.scs8888.cn/",
  "static sitemap homepage should use the canonical production origin",
);

[
  "login",
  "reg",
  "usercenter",
  "chongzhi",
  "tixian",
  "fabumianfeiwenzhang",
  "fufei",
].forEach((privateRoute) => {
  assert(!sitemap.includes(privateRoute), `private route must not appear in sitemap: ${privateRoute}`);
});

assert(/<meta\s+name="description"/i.test(index), "homepage description metadata missing");
assert(
  /<link\s+rel="canonical"\s+href="https:\/\/www\.scs8888\.cn\/"/i.test(index),
  "homepage canonical metadata missing",
);
assert(
  index.includes('<h1 class="seo-heading">神彩算彩票数据分析与免费预测文章</h1>'),
  "homepage crawlable H1 missing",
);
assert(
  index.includes("开奖数据、走势分析和免费文章"),
  "homepage crawlable site description missing",
);

assert(/<meta\s+name="description"/i.test(article), "article default description metadata missing");
assert(
  /<meta\s+name="robots"\s+content="index, follow"/i.test(article),
  "article robots metadata missing",
);
assert(
  /<link\s+id="canonicalUrl"\s+rel="canonical"/i.test(article),
  "article canonical hook missing",
);
assert(article.includes("function updateArticleSeo(data)"), "article SEO updater missing");
assert(article.includes("updateArticleSeo(data);"), "article renderer should update SEO metadata");
assert(
  article.includes("https://www.scs8888.cn/mianfei/"),
  "article canonical should use the public pretty URL",
);

assert(
  /return `\/mianfei\/\$\{id\}\.html`/.test(commonUtil),
  "CommonUtil.freeArticleHref should own the public article URL",
);

const deploymentDocPath = "docs/baidu-indexing-deployment.md";
assert(fs.existsSync(deploymentDocPath), "backend deployment handoff missing");
const deploymentDoc = read(deploymentDocPath);
[
  "/mianfei/{id}.html",
  "404",
  "301",
  "动态 sitemap",
  "Baiduspider",
  "预渲染",
].forEach((requiredText) => {
  assert(deploymentDoc.includes(requiredText), `deployment handoff missing: ${requiredText}`);
});

console.log("SEO indexing checks passed");