import { mkdir, rename, writeFile } from "node:fs/promises";
import { dirname } from "node:path";
import { randomBytes } from "node:crypto";

export async function writeTextAtomic(path: string, content: string): Promise<void> {
  await mkdir(dirname(path), { recursive: true });
  const temporary = `${path}.${process.pid}.${randomBytes(6).toString("hex")}.tmp`;
  await writeFile(temporary, content, { encoding: "utf8", mode: 0o600 });
  await rename(temporary, path);
}

export async function writeJsonAtomic(path: string, value: unknown): Promise<void> {
  await writeTextAtomic(path, `${JSON.stringify(value, null, 2)}\n`);
}