import { copyFile, mkdir, readdir } from 'node:fs/promises';
import path from 'node:path';

interface RuntimeAssetCopy {
  source: string;
  target: string;
}

const runtimeAssetCopies: readonly RuntimeAssetCopy[] = [
  {
    source: 'src/db/migrations/package.json',
    target: 'dist/src/db/migrations/package.json',
  },
];

async function copyRuntimeAsset(copy: RuntimeAssetCopy): Promise<void> {
  await mkdir(path.dirname(copy.target), { recursive: true });
  await copyFile(copy.source, copy.target);
}

async function copyMigrationFiles(): Promise<void> {
  const sourceDirectory = 'src/db/migrations';
  const targetDirectory = 'dist/src/db/migrations';
  const entries = await readdir(sourceDirectory, { withFileTypes: true });

  await mkdir(targetDirectory, { recursive: true });

  await Promise.all(
    entries
      .filter((entry) => entry.isFile() && entry.name.endsWith('.js'))
      .map((entry) =>
        copyFile(
          path.join(sourceDirectory, entry.name),
          path.join(targetDirectory, entry.name),
        ),
      ),
  );
}

async function main(): Promise<void> {
  await Promise.all(runtimeAssetCopies.map((copy) => copyRuntimeAsset(copy)));
  await copyMigrationFiles();
}

void main();