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

export async function replaceDirectoryContents(params: {
  sourceDir: string;
  targetDir: string;
}): Promise<void> {
  await fs.mkdir(params.targetDir, { recursive: true });
  const existing = await fs.readdir(params.targetDir);
  await Promise.all(
    existing.map((entry) =>
      fs.rm(path.join(params.targetDir, entry), {
        recursive: true,
        force: true,
      }),
    ),
  );
  const sourceEntries = await fs.readdir(params.sourceDir);
  for (const entry of sourceEntries) {
    await fs.cp(path.join(params.sourceDir, entry), path.join(params.targetDir, entry), {
      recursive: true,
      force: true,
      dereference: false,
    });
  }
}

export async function movePathWithCopyFallback(params: {
  from: string;
  to: string;
}): Promise<void> {
  try {
    await fs.rename(params.from, params.to);
    return;
  } catch (error) {
    const code = (error as NodeJS.ErrnoException | null)?.code;
    if (code !== "EXDEV") {
      throw error;
    }
  }
  await fs.cp(params.from, params.to, {
    recursive: true,
    force: true,
    dereference: false,
  });
  await fs.rm(params.from, { recursive: true, force: true });
}