// https://github.com/orgs/marp-team/discussions/422#discussioncomment-5268779

const { Marp } = require('@marp-team/marp-core')
const hljs = require('highlight.js')

// highlightjs-chapel for static web page is required a globally exposed `hljs` to
// extend highlight.js.
globalThis.hljs = hljs

require('highlightjs-chapel/dist/chapel.min.js')

// Create extended Marp class from an original Marp Core.
class MarpWithHighlightJSChapel extends Marp {
  // Overload highlighter to use highlight.js with extended by highlightjs-chapel.
  highlighter(code, lang, _attrs) {
    if (lang && hljs.getLanguage(lang)) {
      return hljs.highlight(code, {
        language: lang,
        ignoreIllegals: true,
      }).value
    }
    return ''
  }
}

module.exports = MarpWithHighlightJSChapel