import hljs from 'highlight.js/lib/core'
import javascript from 'highlight.js/lib/languages/javascript'
import python from 'highlight.js/lib/languages/python'
import php from 'highlight.js/lib/languages/php'
import go from 'highlight.js/lib/languages/go'
import java from 'highlight.js/lib/languages/java'
import bash from 'highlight.js/lib/languages/bash'
import csharp from 'highlight.js/lib/languages/csharp'
import json from 'highlight.js/lib/languages/json'
import 'highlight.js/styles/github-dark.css'

hljs.registerLanguage('javascript', javascript)
hljs.registerLanguage('python', python)
hljs.registerLanguage('php', php)
hljs.registerLanguage('go', go)
hljs.registerLanguage('java', java)
hljs.registerLanguage('bash', bash)
hljs.registerLanguage('csharp', csharp)
hljs.registerLanguage('json', json)

export default defineNuxtPlugin((nuxtApp) => {
  nuxtApp.vueApp.directive('highlight', {
    mounted(el: HTMLElement) {
      el.querySelectorAll('pre code').forEach((block) => {
        hljs.highlightElement(block as HTMLElement)
      })
    },
    updated(el: HTMLElement) {
      el.querySelectorAll('pre code').forEach((block) => {
        delete (block as HTMLElement).dataset.highlighted
        hljs.highlightElement(block as HTMLElement)
      })
    },
  })

  // Override hljs background to use Vuetify surface variant
  const style = document.createElement('style')
  style.textContent = `
    pre code.hljs {
      background: transparent;
      padding: 0;
    }
  `
  document.head.appendChild(style)
})