{{- /*
Renders an embedded YouTube video.

@param {bool} [allowFullScreen=true] Whether the iframe element can activate full screen mode.
@param {bool} [autoplay=false] Whether to automatically play the video. Forces mute to be true.
@param {string} [class] The class attribute of the wrapping div element. When specified, removes the style attributes from the iframe element and its wrapping div element.
@param {bool} [controls=true] Whether to display the video controls.
@param {int} [end] The time, measured in seconds from the start of the video, when the player should stop playing the video.
@param {string} [id] The video id. Optional if the id is the first and only positional argument.
@param {string} [loading=eager] The loading attribute of the iframe element.
@param {bool} [loop=false] Whether to indefinitely repeat the video. Ignores the start and end arguments after the first play.
@param {bool} [mute=false] Whether to mute the video. Always true when autoplay is true.
@param {int} [start] The time, measured in seconds from the start of the video, when the player should start playing the video.
@param {string} [title] The title attribute of the iframe element. Defaults to "YouTube video".

@returns {template.HTML}

@reference https://developers.google.com/youtube/player_parameters

@example {{< youtube 0RKpf3rK57I >}}
@example {{< youtube id=0RKpf3rK57I loading=lazy start=30 >}}
*/}}

{{- $pc := .Page.Site.Config.Privacy.YouTube }}
{{- $remoteErrID := "err-youtube-remote" }}
{{- if not $pc.Disable }}
	{{- with $id := or (.Get "id") (.Get 0) }}

		{{- /* Set defaults. */}}
		{{- $allowFullScreen := true }}
		{{- $autoplay := 0 }}
		{{- $class := "" }}
		{{- $controls := 1 }}
		{{- $end := 0 }}
		{{- $loading := "eager" }}
		{{- $loop := 0 }}
		{{- $mute := 0 }}
		{{- $start := 0 }}
		{{- $title := "YouTube video" }}
		{{- $iframeAllowList := "accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" }}

		{{- /* Get arguments. */}}
		{{- if in (slice "true" true 1) ($.Get "allowFullScreen") }}
			{{- $allowFullScreen = true }}
		{{- else if in (slice "false" false 0) ($.Get "allowFullScreen") }}
			{{- $allowFullScreen = false }}
		{{- end }}
		{{- if in (slice "true" true 1) ($.Get "autoplay") }}
			{{- $autoplay = 1 }}
		{{- else if in (slice "false" false 0) ($.Get "autoplay") }}
			{{- $autoplay = 0 }}
		{{- end }}
		{{- if in (slice "true" true 1) ($.Get "controls") }}
			{{- $controls = 1 }}
		{{- else if in (slice "false" false 0) ($.Get "controls") }}
			{{- $controls = 0 }}
		{{- end }}
		{{- if in (slice "true" true 1) ($.Get "loop") }}
			{{- $loop = 1 }}
		{{- else if in (slice "false" false 0) ($.Get "loop") }}
			{{- $loop = 0 }}
		{{- end }}
		{{- if or (in (slice "true" true 1) ($.Get "mute")) $autoplay }}
			{{- $mute = 1 }}
		{{- else if in (slice "false" false 0) ($.Get "mute") }}
			{{- $mute = 0 }}
		{{- end }}
		{{- $class := or ($.Get "class") $class }}
		{{- $end := or ($.Get "end") $end }}
		{{- $loading := or ($.Get "loading") $loading }}
		{{- $start := or ($.Get "start") $start }}
		{{- $title := or ($.Get "title") $title }}

		{{- /* Adjust iframeAllowList. */}}
		{{- if $allowFullScreen }}
			{{- $iframeAllowList = printf "%s; fullscreen" $iframeAllowList }}
		{{- end }}

		{{- /* Define src attribute. */}}
		{{- $host := cond $pc.PrivacyEnhanced "www.youtube-nocookie.com" "www.youtube.com" }}
		{{- $src := printf "https://%s/embed/%s" $host $id }}
		{{- $params := dict
			"autoplay" $autoplay
			"controls" $controls
			"end" $end
			"mute" $mute
			"start" $start
			"loop" $loop
		}}
		{{- if $loop }}
			{{- $params = merge $params (dict "playlist" $id) }}
		{{- end }}
		{{- with querify $params }}
			{{- $src = printf "%s?%s" $src . }}
		{{- end }}

		{{- /* Set div attributes. */}}
		{{- $divStyle := "position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;" }}
		{{- if $class }}
			{{- $divStyle = "" }}
		{{- end }}

		{{- /* Set iframe attributes. */}}
		{{- $iframeStyle := "position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" }}
		{{- if $class }}
			{{- $iframeStyle = "" }}
		{{- end }}
		{{- $referrerpolicy := "strict-origin-when-cross-origin" }}

		{{- /* Render. */ -}}
		<div
			{{- with $class }} class="{{ . }}" {{- end }}
			{{- with $divStyle }} style="{{ . | safeCSS }}" {{- end -}}>
			<iframe
				{{- with $iframeAllowList }} allow="{{ . }}" {{- end }}
				{{- with $loading }} loading="{{ . }}" {{- end }}
				{{- with $referrerpolicy }} referrerpolicy="{{ . }}" {{- end }}
				{{- with $src }} src="{{ . }}" {{- end }}
				{{- with $iframeStyle }} style="{{ . | safeCSS }}" {{- end }}
				{{- with $title }} title="{{ . }}" {{- end -}}></iframe>
		</div>
	{{- else }}
		{{- errorf "The %q shortcode requires an id argument. See %s" .Name .Position }}
	{{- end }}
{{- end }}
