// packages/embed-loader/sync-to-viewer.js
// 复制构建产物到 viewer 静态目录：vite publicDir（apps/viewer/public/）在 dev
// 直接可访问、build 自动携带进 dist/。拷贝后 sha256 校验，不一致即失败（构建脚本
// 级检查，非生产路径，允许 console）。用法：pnpm --filter @photo/embed-loader sync。
import { createHash } from 'node:crypto';
import { cpSync, existsSync, mkdirSync, readFileSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const here = dirname(fileURLToPath(import.meta.url));
const src = resolve(here, 'dist/v1/loader.js');
const dest = resolve(here, '../../apps/viewer/public/embed/v1/loader.js');

if (!existsSync(src)) {
  console.error('[sync] missing dist/v1/loader.js — run `pnpm build` first');
  process.exit(1);
}

mkdirSync(dirname(dest), { recursive: true });
cpSync(src, dest);

function sha256(p) {
  return createHash('sha256').update(readFileSync(p)).digest('hex');
}

const srcHash = sha256(src);
if (srcHash !== sha256(dest)) {
  console.error('[sync] hash mismatch after copy — viewer copy diverged');
  process.exit(1);
}
console.log(`[sync] dist/v1/loader.js -> apps/viewer/public/embed/v1/loader.js (sha256 ${srcHash.slice(0, 12)}…)`);