{{/* Table of Contents */}}
{{/* TODO: toc bottom part should be able to hide */}}
{{- $toc := .Params.toc | default true -}}
{{- with site.Params.toc.disabled -}}{{ $toc = not . }}{{- end -}}


<nav class="order-last hidden w-64 shrink-0 xl:block print:hidden px-4" aria-label="table of contents">
  {{ if $toc }}
    <div class="sticky top-16 overflow-y-auto pr-4 pt-6 text-sm [hyphens:auto] max-h-[calc(100vh-4rem-env(safe-area-inset-bottom))] ltr:-mr-4 rtl:-ml-4">
      {{ with .Fragments.Headings }}
        <p class="mb-4 font-semibold tracking-tight">{{ i18n "article.on_this_page" }}</p>
        {{ range . }}
          <ul>
            {{ with .Headings }}
              {{ template "toc-subheading" (dict "headings" . "level" 0) }}
            {{ end }}
          </ul>
        {{ end }}
      {{ end }}

      {{ $borderClass := "mt-8 border-t bg-white pt-8 shadow-[0_-12px_16px_white] dark:bg-dark dark:shadow-[0_-12px_16px_#111]" }}
      {{ if not .Fragments.Headings }}
        {{ $borderClass = "" }}
      {{ end }}

      {{/* TOC bottom part */}}
      <div class="{{ $borderClass }} sticky bottom-0 flex flex-col items-start gap-2 pb-8 dark:border-neutral-800 contrast-more:border-t contrast-more:border-neutral-400 contrast-more:shadow-none contrast-more:dark:border-neutral-400">
        {{- if not site.Params.editURL.disabled -}}
          {{- $editURL := urls.JoinPath site.Params.editURL.base .File.Path -}}
          {{- with .Params.editURL -}}{{ $editURL = .Params.editURL }}{{- end -}}
          <a class="text-xs font-medium text-gray-500 hover:text-gray-900 dark:text-gray-400 dark:hover:text-gray-100 contrast-more:text-gray-800 contrast-more:dark:text-gray-50" href="{{ $editURL }}" target="_blank" rel="noreferer">{{ i18n "article.edit_this_page" }}</a>
        {{- end -}}
      </div>
    </div>
  {{ end }}
</nav>

{{/* TOC subheadings component. This is a recursive component that renders a list of headings. */}}
{{- define "toc-subheading" -}}
  {{ $headings := .headings }}
  {{ $level := .level }}
  {{ if ge $level 6 }}
    {{ return }}
  {{ end }}

  {{ $padding := (mul $level 4) }}
  {{ $class := cond (eq $level 0) "font-semibold" (printf "ltr:pl-%d rtl:pr-%d" $padding $padding) }}

  {{ range $headings }}
    {{ if .Title }}
      <li class="my-2 scroll-my-6 scroll-py-6">
        <a class="{{ $class }} inline-block text-gray-500 hover:text-gray-900 dark:text-gray-400 dark:hover:text-gray-300 contrast-more:text-gray-900 contrast-more:underline contrast-more:dark:text-gray-50 w-full break-words" href="#{{ anchorize .ID }}">
          {{ .Title }}
        </a>
      </li>
    {{ end }}
    {{ with .Headings }}
      {{ template "toc-subheading" (dict "headings" . "level" (add $level 1)) }}
    {{ end }}

  {{ end }}
{{- end -}}