import { mkdir, readFile, writeFile } from "node:fs/promises";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const repoRoot = join(dirname(fileURLToPath(import.meta.url)), "..");
const sourcePath = join(repoRoot, "index.html");
const templateRoot = join(repoRoot, "templates", "pages", "home");
const blockRoot = join(templateRoot, "blocks");
const contentPath = join(repoRoot, "content", "pages", "home.json");

const html = await readFile(sourcePath, "utf8");

const marker = {
  hero: '<header id="hero" class="s h-screen">',
  features: '<section id="features" class="s h-screen py mobile-flip">',
  cViz: '<div class="c-viz">',
  pricingIntro: '<section id="waitlist" class="s">',
  waitlistFiles: '<section id="waitlist" class="s h-screen">',
  demoVideoFolder: '<div data-module="folder-wrap" class="folder-w video-w">',
  footer: '<footer class="s footer">',
};

function findRequired(needle, from = 0) {
  const index = html.indexOf(needle, from);
  if (index === -1) {
    throw new Error(`Could not find marker: ${needle}`);
  }
  return index;
}

const heroStart = findRequired(marker.hero);
const featuresStart = findRequired(marker.features, heroStart);
const cVizStart = findRequired(marker.cViz, featuresStart);
const cVizOpenEnd = cVizStart + marker.cViz.length;
const pricingIntroStart = findRequired(marker.pricingIntro, cVizOpenEnd);
const waitlistFilesStart = findRequired(marker.waitlistFiles, pricingIntroStart);
const demoVideoFolderStart = findRequired(marker.demoVideoFolder, waitlistFilesStart);
const footerStart = findRequired(marker.footer, demoVideoFolderStart);
const footerEnd = findRequired("</footer>", footerStart) + "</footer>".length;

const shell = [
  html.slice(0, heroStart),
  "{{NODEDC_BLOCKS_BEFORE_CVIZ}}",
  html.slice(cVizStart, cVizOpenEnd),
  "{{NODEDC_BLOCKS_CVIZ}}",
  html.slice(footerEnd),
].join("");

const blocks = [
  {
    region: "beforeCViz",
    id: "hero-waitlist",
    type: "staticHtml",
    template: "hero-waitlist.html",
    adminLabel: "Первый экран и заявка",
    anchor: "hero",
    html: html.slice(heroStart, featuresStart),
  },
  {
    region: "beforeCViz",
    id: "feature-video",
    type: "staticHtml",
    template: "feature-video.html",
    adminLabel: "Демо и базовая логика",
    anchor: "features",
    html: html.slice(featuresStart, cVizStart),
  },
  {
    region: "cViz",
    id: "product-system",
    type: "staticHtml",
    template: "product-system.html",
    adminLabel: "Компоненты, режимы, FAQ и тарифная таблица",
    anchor: null,
    html: html.slice(cVizOpenEnd, pricingIntroStart),
  },
  {
    region: "cViz",
    id: "pricing-intro",
    type: "staticHtml",
    template: "pricing-intro.html",
    adminLabel: "Интро тарифов",
    anchor: "waitlist",
    html: html.slice(pricingIntroStart, waitlistFilesStart),
  },
  {
    region: "cViz",
    id: "waitlist-files",
    type: "staticHtml",
    template: "waitlist-files.html",
    adminLabel: "Форма ожидания и txt-файлы",
    anchor: "waitlist",
    html: html.slice(waitlistFilesStart, demoVideoFolderStart),
  },
  {
    region: "cViz",
    id: "demo-video-folder",
    type: "staticHtml",
    template: "demo-video-folder.html",
    adminLabel: "Иконка демо-видео в доке",
    anchor: null,
    html: html.slice(demoVideoFolderStart, footerStart),
  },
  {
    region: "cViz",
    id: "footer",
    type: "staticHtml",
    template: "footer.html",
    adminLabel: "Футер",
    anchor: null,
    html: html.slice(footerStart, footerEnd),
  },
];

const page = {
  schemaVersion: 1,
  slug: "home",
  output: "index.html",
  title: "NODE.DC",
  seo: {
    title: "NODE.DC — ИИ-платформа для Webflow",
    description:
      "Единая платформа для кастомного кода, MCP и ИИ-агентов в Webflow: контекст проекта, автоматизация, деплой и управляемая разработка.",
  },
  regions: [
    {
      id: "beforeCViz",
      label: "До c-viz wrapper",
      description: "Hero and first product section. These blocks live before the visual wrapper.",
      blocks: blocks
        .filter((block) => block.region === "beforeCViz")
        .map(({ html: _html, ...block }) => ({ ...block, enabled: true })),
    },
    {
      id: "cViz",
      label: "Inside c-viz wrapper",
      description: "Sections coupled to WebGL/color-flip shell. Keep these in this region for now.",
      blocks: blocks
        .filter((block) => block.region === "cViz")
        .map(({ html: _html, ...block }) => ({ ...block, enabled: true })),
    },
  ],
};

await mkdir(blockRoot, { recursive: true });
await mkdir(dirname(contentPath), { recursive: true });
await writeFile(join(templateRoot, "shell.html"), shell);
for (const block of blocks) {
  await writeFile(join(blockRoot, block.template), block.html);
}
await writeFile(contentPath, `${JSON.stringify(page, null, 2)}\n`);

console.log(`Extracted ${blocks.length} blocks from ${sourcePath}`);
console.log(`Wrote ${join(templateRoot, "shell.html")}`);
console.log(`Wrote ${contentPath}`);