import { concatMdSync } from "concat-md";
import path from "path";
import fs from "fs";

// Явный порядок файлов внутри каждого языка
const fileOrder = [
  // index
  "index.md",
  // workflow
  "workflow/getting-started.md",
  "workflow/creating-app.md",
  "workflow/creating-pages.md",
  "workflow/creating-components.md",
  "workflow/styling.md",
  "workflow/data-fetching.md",
  "workflow/state-management.md",
  "workflow/localization.md",
  // basics
  "basics/tech-stack.md",
  "basics/architecture.md",
  "basics/code-style.md",
  "basics/naming.md",
  "basics/documentation.md",
  "basics/typing.md",
  // applied
  "applied/project-structure.md",
  "applied/components.md",
  "applied/templates-generation.md",
  "applied/styles.md",
  "applied/images-sprites.md",
  "applied/svg-sprites.md",
  "applied/video.md",
  "applied/api.md",
  "applied/stores.md",
  "applied/hooks.md",
  "applied/fonts.md",
  "applied/localization.md",
];

const buildRules = (lang) => {
  const srcDir = `./docs/${lang}`;
  const outDir = `./generated/${lang}`;
  const outFile = path.join(outDir, "RULES.md");

  if (!fs.existsSync(srcDir)) {
    console.log(`Пропуск ${lang}: папка ${srcDir} не найдена`);
    return;
  }

  fs.mkdirSync(outDir, { recursive: true });

  const resultMd = concatMdSync(srcDir, {
    toc: false,
    sorter: (a, b) => {
      const indexA = fileOrder.indexOf(a);
      const indexB = fileOrder.indexOf(b);
      const posA = indexA === -1 ? fileOrder.length : indexA;
      const posB = indexB === -1 ? fileOrder.length : indexB;
      return posA - posB;
    },
  });

  fs.writeFileSync(outFile, resultMd, "utf8");
  console.log(`RULES.md (${lang}) создан: ${outFile}`);
};

// Собираем RULES.md для обоих языков
buildRules("ru");
buildRules("en");

// Генерируем README из index.md
const buildReadme = (lang, outFile) => {
  const indexPath = `./docs/${lang}/index.md`;

  if (!fs.existsSync(indexPath)) {
    console.log(`Пропуск README (${lang}): ${indexPath} не найден`);
    return;
  }

  const content = fs.readFileSync(indexPath, "utf8")
    .replace(/^---[\s\S]*?---\n*/m, "");

  fs.writeFileSync(outFile, content, "utf8");
  console.log(`${outFile} создан из ${indexPath}`);
};

buildReadme("en", "./README.md");
buildReadme("ru", "./README_RU.md");