import { mkdirSync, renameSync, writeFileSync } from "node:fs";
import { dirname } from "node:path";
import { randomUUID } from "node:crypto";

export function atomicWrite(path: string, content: string): void {
  mkdirSync(dirname(path), { recursive: true });
  const temp = `${path}.${process.pid}.${randomUUID()}.tmp`;
  writeFileSync(temp, content, { encoding: "utf8", mode: 0o600 });
  renameSync(temp, path);
}

export function atomicWriteJson(path: string, value: unknown): void {
  atomicWrite(path, `${JSON.stringify(value, null, 2)}\n`);
}