"use strict";

const fs = require("fs");
const path = require("path");

const rootDir = __dirname;
const distDir = path.join(rootDir, "dist");

const directoriesToCopy = [
  "config",
  "constants",
  "controllers",
  "db",
  "middleware",
  "models",
  "routes",
  "services",
  "utils",
  "public",
];

const filesToCopy = ["app.js", "server.js", "package.json", "package-lock.json"];

function copyFile(sourcePath, targetPath) {
  fs.mkdirSync(path.dirname(targetPath), { recursive: true });
  fs.copyFileSync(sourcePath, targetPath);
}

function copyDirectory(sourceDir, targetDir) {
  if (!fs.existsSync(sourceDir)) {
    return;
  }

  for (const entry of fs.readdirSync(sourceDir, { withFileTypes: true })) {
    const sourcePath = path.join(sourceDir, entry.name);
    const targetPath = path.join(targetDir, entry.name);

    if (entry.isDirectory()) {
      copyDirectory(sourcePath, targetPath);
      continue;
    }

    if (entry.isFile()) {
      copyFile(sourcePath, targetPath);
    }
  }
}

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

for (const directory of directoriesToCopy) {
  copyDirectory(path.join(rootDir, directory), path.join(distDir, directory));
}

for (const file of filesToCopy) {
  const sourcePath = path.join(rootDir, file);
  if (fs.existsSync(sourcePath)) {
    copyFile(sourcePath, path.join(distDir, file));
  }
}

console.log(`Backend build copied runtime files to ${path.relative(rootDir, distDir)}`);