// 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（先 build）。UI-04 起 v1/v2 双产物。
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 targets = [
  { src: 'dist/v1/loader.js', dest: '../../apps/viewer/public/embed/v1/loader.js' },
  { src: 'dist/v2/loader.js', dest: '../../apps/viewer/public/embed/v2/loader.js' },
];

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

for (const { src: srcRel, dest: destRel } of targets) {
  const src = resolve(here, srcRel);
  const dest = resolve(here, destRel);
  if (!existsSync(src)) {
    console.error(`[sync] missing ${srcRel} — run \`pnpm build\` first`);
    process.exit(1);
  }
  mkdirSync(dirname(dest), { recursive: true });
  cpSync(src, dest);
  const srcHash = sha256(src);
  if (srcHash !== sha256(dest)) {
    console.error(`[sync] hash mismatch after copy — ${destRel} diverged`);
    process.exit(1);
  }
  console.log(`[sync] ${srcRel} -> ${destRel} (sha256 ${srcHash.slice(0, 12)}…)`);
}