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

const repoRoot = process.cwd();
const distRoot = path.join(repoRoot, "dist");
const staticDirs = ["assets", "css", "js"];

function copyDir(source, destination) {
  fs.rmSync(destination, { recursive: true, force: true });
  fs.mkdirSync(path.dirname(destination), { recursive: true });
  fs.cpSync(source, destination, { recursive: true });
}

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

function materializeExtensionlessHtmlRoutes() {
  let routes = 0;

  for (const filePath of listHtmlFiles(distRoot)) {
    const relativePath = path.relative(distRoot, filePath);
    const extensionlessPath = relativePath.replace(/\.html$/, "");
    const destination = path.join(distRoot, extensionlessPath, "index.html");

    if (path.resolve(destination) === path.resolve(filePath)) {
      continue;
    }

    fs.mkdirSync(path.dirname(destination), { recursive: true });
    fs.copyFileSync(filePath, destination);
    routes += 1;
  }

  return routes;
}

for (const dir of staticDirs) {
  copyDir(path.join(repoRoot, dir), path.join(distRoot, dir));
}

const speechIndexSource = path.join(distRoot, "speeches.html");
const speechIndexDestination = path.join(distRoot, "speeches", "index.html");
const adminIndexSource = path.join(distRoot, "admin.html");
const adminIndexDestination = path.join(distRoot, "admin", "index.html");

if (fs.existsSync(speechIndexSource)) {
  fs.mkdirSync(path.dirname(speechIndexDestination), { recursive: true });
  fs.copyFileSync(speechIndexSource, speechIndexDestination);
}

if (fs.existsSync(adminIndexSource)) {
  fs.mkdirSync(path.dirname(adminIndexDestination), { recursive: true });
  fs.copyFileSync(adminIndexSource, adminIndexDestination);
}

const extensionlessRoutes = materializeExtensionlessHtmlRoutes();

console.log(`Copied ${staticDirs.join(", ")} into dist/.`);
console.log(`Materialized ${extensionlessRoutes} extensionless HTML route aliases.`);