import { readFile, writeFile } from 'node:fs/promises';
import { dirname, join, resolve } from 'node:path';
import process from 'node:process';
import { fileURLToPath } from 'node:url';
import { format } from 'prettier';
import { toolboxAppDefinition } from '../src/toolboxApp.ts';

const repositoryRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..');
const packageJson = JSON.parse(
  await readFile(join(repositoryRoot, 'package.json'), 'utf8')
);
const manifestPath = join(repositoryRoot, 'public', 'toolbox-app.json');

if (toolboxAppDefinition.version !== packageJson.version) {
  throw new Error(
    `Version mismatch: package.json is ${packageJson.version}, while src/toolboxApp.ts is ${toolboxAppDefinition.version}.`
  );
}

const output = await format(JSON.stringify(toolboxAppDefinition), {
  parser: 'json',
});

if (process.argv.includes('--check')) {
  const existing = await readFile(manifestPath, 'utf8').catch(() => '');
  if (existing !== output) {
    throw new Error(
      'public/toolbox-app.json is out of date. Run `npm run manifest:generate`.'
    );
  }
} else {
  await writeFile(manifestPath, output);
}