{{ $productPathData := findRE "[^/]+.*?" .RelPermalink }}
{{ $product := index $productPathData 0 }}
{{ $productName := (index .Site.Data.products $product).name }}
{{ $currentVersion := index $productPathData 1 }}
{{ $latestV2 := index (last 1 .Site.Data.products.influxdb.versions) 0 }}

{{ $stableVersion := (index .Site.Data.products $product).latest }}
{{ $stableVersionURL := replaceRE `v[1-2]\.[0-9]{1,2}` $stableVersion .RelPermalink }}
{{ $v2EquivalentURL := replaceRE `v[1-2]\.[0-9]{1,2}` $latestV2 .Page.Params.v2 }}
{{ $v2EquivalentPage := .GetPage (replaceRE `\/$` "" $v2EquivalentURL) }}
{{ $v2PageExists := gt (len $v2EquivalentPage.Title) 0 }}
{{ $isCloud := in .Page.RelPermalink "/influxdb/cloud/"}}

{{ if and (lt $currentVersion $stableVersion) (not $isCloud) }}
  <div class="warn block old-version">
    <p>
      This page documents an earlier version of {{ $productName }}.
      <a href="/{{ $product }}/{{ $stableVersion }}/">{{ $productName }} {{ $stableVersion }}</a> is the latest stable version.
      {{ if eq (findRE `v[1-2]` $currentVersion) (findRE `v[1-2]` $stableVersion) }}
        <!-- Check if page exists in latest major version docs -->
        {{ if gt (len (.GetPage ((replaceRE `v[1-2]\.[0-9]{1,2}` (index .Site.Data.products $product).latest .RelPermalink) | replaceRE `\/$` "")).Title) 0 }}
          <a href="{{ $stableVersionURL }}">View this page in the {{ $stableVersion }} documentation</a>.
        {{ end }}
      {{ else if and (ne (findRE `v[1-2]` $currentVersion) (findRE `v[1-2]` $stableVersion)) (.Page.Params.v2) }}
        <!-- Check if the v2 equivalent page exists -->
        {{ if $v2PageExists }}
          <span style="margin-right:.25rem">See the equivalent <strong>InfluxDB {{ $latestV2 }}</strong> documentation:</span> <a href="{{ $v2EquivalentPage.RelPermalink }}">{{ $v2EquivalentPage.Title }}</a>.
        {{ else }}
          See the <a href="{{ $v2EquivalentURL }}">equivalent InfluxDB {{ $latestV2 }} documentation</a>.
        {{ end }}
      {{ end }}
    </p>
  </div>
{{ end }}

{{ if and .Page.Params.v2 (eq (findRE `v[1-2]` $currentVersion) (findRE `v[1-2]` $stableVersion)) }}
  <div class="note block old-version">
    <p>
      {{ if $v2PageExists }}
        <span style="margin-right:.25rem">See the equivalent <strong>InfluxDB {{ $latestV2 }}</strong> documentation:</span> <a href="{{ $v2EquivalentPage.RelPermalink }}">{{ $v2EquivalentPage.Title }}</a>.
      {{ else }}
        See the <a href="{{ $v2EquivalentURL }}">equivalent InfluxDB {{ $latestV2 }} documentation</a>.
      {{ end }}
    </p>
  </div>
{{ end }}