#!/usr/bin/env node
'use strict';

const fs = require('fs-extra');
const path = require('path');
const endent = require('endent');

// Update theme names list in codemirror-editing-hook.js
async function getThemes() {
  const p = path.join(__dirname, '..', 'vendor/codemirror/theme/');
  const files = await fs.readdir(p);
  return files
    .filter(name => name.endsWith('.css'))
    .map(name => name.replace('.css', ''))
    .sort();
}

async function updateHook(themes) {
  const fileName = path.join(__dirname, '..', 'edit/codemirror-themes.js');
  fs.writeFile(fileName, endent`
    /* exported CODEMIRROR_THEMES */
    // this file is generated by update-codemirror-themes.js
    'use strict';

    const CODEMIRROR_THEMES = ${JSON.stringify(themes, null, 2)};
  `.replace(/"/g, "'") + '\n');
}

function exit(err) {
  if (err) {
    console.error(err);
  }
  process.exit(err ? 1 : 0);
}

getThemes()
  .then(themes => updateHook(themes))
  .then(() => console.log('\x1b[32m%s\x1b[0m', 'codemirror themes list updated'))
  .catch(exit);