// Copies the ZXing reader wasm into public/ so the browser loads it from our own origin.
//
// zxing-wasm fetches it from a CDN by default, which the CSP forbids (SPEC.md section 14:
// no third party scripts) and which would break the offline scan queue. Runs before dev
// and build, so a fresh clone never has to remember.
import { copyFileSync, mkdirSync } from 'node:fs';
import { createRequire } from 'node:module';
import { dirname, join, sep } from 'node:path';
import { fileURLToPath } from 'node:url';

const require = createRequire(import.meta.url);
// Walk up from whichever build the resolver picked to the package root, so the path does
// not depend on cjs vs es. The package does not export ./package.json.
const readerEntry = require.resolve('zxing-wasm/reader');
const packageRoot = readerEntry.slice(0, readerEntry.lastIndexOf(`${sep}dist${sep}`));
const source = join(packageRoot, 'dist', 'reader', 'zxing_reader.wasm');
const targetDir = join(dirname(dirname(fileURLToPath(import.meta.url))), 'public', 'zxing');

mkdirSync(targetDir, { recursive: true });
copyFileSync(source, join(targetDir, 'zxing_reader.wasm'));
console.info(`[zxing] wasm copied to ${targetDir}`);