import { mkdtempSync, rmSync } from "node:fs";
import os from "node:os";
import path from "node:path";
import { OfficeError } from "./errors.ts";

export const PREVIEW_PREFIX = "pi-word-pdf-preview-";
export const WORK_PREFIX = "pi-word-pdf-work-";

export function makePreviewDirectory(): string {
  return mkdtempSync(path.join(os.tmpdir(), PREVIEW_PREFIX));
}

export function makeWorkDirectory(): string {
  return mkdtempSync(path.join(os.tmpdir(), WORK_PREFIX));
}

export function removeWorkDirectory(directory: string): void {
  rmSync(directory, { recursive: true, force: true });
}

export function cleanupPreviewDirectory(directory: string): void {
  const resolved = path.resolve(directory);
  const tempRoot = path.resolve(os.tmpdir());
  if (path.dirname(resolved) !== tempRoot || !path.basename(resolved).startsWith(PREVIEW_PREFIX)) {
    throw new OfficeError("只允许清理由 pi-word-pdf 创建的系统临时预览目录。", "UNSAFE_CLEANUP_PATH", { path: directory });
  }
  rmSync(resolved, { recursive: true, force: true });
}