// Embeds assets/reader (css, js, fonts) into a TS module for iOS, where WKWebView cannot
// load file:// subresources into a chapter whose base URL is the source's site.
// Run by `pnpm postinstall` and the iOS build script; the output is not committed.
import { readdirSync, readFileSync, writeFileSync } from 'node:fs';
import { join, parse } from 'node:path';

const root = join(import.meta.dirname, '..', 'assets', 'reader');
const read = (dir, encoding) =>
  Object.fromEntries(
    readdirSync(join(root, dir)).sort().map(file => [parse(file).name, readFileSync(join(root, dir, file), encoding)]),
  );

const out = join(import.meta.dirname, '..', 'src', 'utils', 'readerAssets', 'embedded.generated.ts');
writeFileSync(
  out,
  '// Generated by scripts/embed-reader-assets.mjs from assets/reader. Do not edit.\n' +
    `export const css: Record<string, string> = ${JSON.stringify(read('css', 'utf8'))};\n` +
    `export const js: Record<string, string> = ${JSON.stringify(read('js', 'utf8'))};\n` +
    `export const fonts: Record<string, string> = ${JSON.stringify(read('fonts', 'base64'))};\n`,
);
console.log(`reader assets embedded: ${out}`);