import fs from "node:fs";
import path from "node:path";

export const repoRoot = process.cwd();
export const legacyHtmlRoot = path.join(repoRoot, "archive-source");
export const migratedHtmlPages = new Set([
  "2013-sunday-service-archive.html",
  "2014-sunday-services.html",
  "2015-sunday-services-archive.html",
  "2016-sunday-service-archive.html",
  "2017-sunday-service-archive.html",
  "2018-sunday-service-archive.html",
  "about.html",
  "about-us-organizations.html",
  "archive-sunday-services-2013.html",
  "archive-sunday-services-2014.html",
  "archive-sunday-services-2015.html",
  "archive-sunday-services-2016.html",
  "archive-sunday-services-2017.html",
  "archive-sunday-services-2018.html",
  "contact.html",
  "events.html",
  "index.html",
  "register.html",
  "services.html",
  "speeches/index.html",
  "the-founders.html",
  "videos.html",
]);

const migratedHtmlPrefixes = [
  "blog/categories/",
  "blog/tags/",
  "speeches/categories/",
  "speeches/rev-dr-sun-myung-moon/",
];

export function walkHtmlFiles(dir = legacyHtmlRoot): string[] {
  return fs.readdirSync(dir, { withFileTypes: true }).flatMap((entry) => {
    const fullPath = path.join(dir, entry.name);
    if (entry.isDirectory()) {
      return walkHtmlFiles(fullPath);
    }
    return entry.isFile() && entry.name.endsWith(".html") ? [fullPath] : [];
  });
}

export function relativeWebsitePath(filePath: string): string {
  return path.relative(legacyHtmlRoot, filePath).split(path.sep).join("/");
}

export function routeFromRelativePath(relativePath: string): string {
  if (relativePath === "index.html") {
    return "";
  }

  return relativePath;
}

export function isMigratedHtmlPage(relativePath: string): boolean {
  return migratedHtmlPages.has(relativePath) || migratedHtmlPrefixes.some((prefix) => relativePath.startsWith(prefix));
}

export function sourcePathFromRoute(route = ""): string {
  const relativePath = route === "" ? "index.html" : route.endsWith(".html") ? route : `${route}/index.html`;
  return path.join(legacyHtmlRoot, relativePath);
}