// Load and normalize browser region scripts for server-rendered player pages.

const fs = require('fs');
const path = require('path');

const PUBLIC_JS_ROOT = path.join(__dirname, '..', 'public', 'js');
const REGION_ROOT_DIR = path.join(PUBLIC_JS_ROOT, 'regions');
const REGION_TYPE_DIR = path.join(REGION_ROOT_DIR, 'type');
const REGION_CORE_SCRIPTS = ['js/shared/placeholder-utils.js', 'js/shared/placeholder-chips.js', 'js/shared/placeholder-info.js', 'js/shared/time-date-placeholders.js', 'js/regions/region-utils.js', 'js/regions/region-types.js'];

function withAssetVersion(scriptPath, assetVersion) {
  if (!assetVersion) {
    return scriptPath;
  }

  return scriptPath + (String(scriptPath).indexOf('?') === -1 ? '?v=' : '&v=') + encodeURIComponent(String(assetVersion));
}

function getRegionModuleScripts(assetVersion) {
  if (!fs.existsSync(REGION_TYPE_DIR)) {
    return [];
  }

  return fs.readdirSync(REGION_TYPE_DIR, { withFileTypes: true })
    .filter((entry) => entry.isFile() && entry.name.toLowerCase().endsWith('.js'))
    .map((entry) => withAssetVersion(`js/regions/type/${entry.name}`, assetVersion))
    .sort((left, right) => left.localeCompare(right));
}

function getRegionEditorScripts(assetVersion) {
  return REGION_CORE_SCRIPTS.map((script) => withAssetVersion(script, assetVersion)).concat(getRegionModuleScripts(assetVersion));
}

module.exports = {
  getRegionModuleScripts,
  getRegionEditorScripts,
  withAssetVersion
};