{{- $title := .Title | default .Site.Title -}}
{{- $desc := .Description | default .Summary | default .Site.Params.description | plainify | truncate 200 -}}
{{- $image := .Params.image | default "/images/og-default.png" -}}
{{- if not (strings.HasPrefix $image "http") -}}
  {{- $image = $image | absURL -}}
{{- end -}}

<meta property="og:title" content="{{ $title }}">
<meta property="og:description" content="{{ $desc }}">
<meta property="og:type" content="{{ cond (eq .Section "tracks") "music.song" "website" }}">
<meta property="og:url" content="{{ .Permalink }}">
<meta property="og:site_name" content="{{ .Site.Title }}">
<meta property="og:locale" content="en_US">

{{- if $image }}
<meta property="og:image" content="{{ $image }}">
<meta property="og:image:alt" content="{{ $title }}">
{{- end }}

{{/* Audio-specific OpenGraph tags */}}
{{- if and (eq .Section "tracks") .Params.audio }}
<meta property="og:audio" content="{{ .Params.audio }}">
<meta property="og:audio:type" content="audio/mpeg">
  {{- if .Params.duration }}
<meta property="music:duration" content="{{ .Params.duration }}">
  {{- end }}
  {{- if .Params.artist }}
<meta property="music:musician" content="{{ .Params.artist }}">
  {{- end }}
{{- end }}