{{ $src := .Get "src" }}
{{ $name := substr $src 0 -4 }}
{{ $ext := substr $src (sub (len $src) 4) }}
{{ $.Scratch.Set "maxsize" 0 }}
{{ $.Scratch.Set "maxsrc" "" }}

{{ range .Page.Site.Data.images }}
    {{ if (isset . "width") and (isset . "height") }}
        {{ $.Scratch.Set "subname" (printf "%v-%vx%v" $name .width .height) }}
        {{ $.Scratch.Set "spec" (printf "%vw" .width) }}
    {{ else if isset . "width" }}
        {{ $.Scratch.Set "subname" (printf "%v-%v" $name .width) }}
        {{ $.Scratch.Set "spec" (printf "%vw" .width) }}
    {{ else if isset . "height" }}
        {{ $.Scratch.Set "subname" (printf "%v-%v" $name .height) }}
        {{ $.Scratch.Set "spec" (printf "%vh" .height) }}
    {{ end }}

    {{ with .name }}
        {{ $.Scratch.Set "subname" (printf "%v-%v" $name .) }}
    {{ end }}
    {{ with .suffix }}
        {{ $.Scratch.Set "subname" (printf "%v_%v" ($.Scratch.Get "subname") .) }}
    {{ end }}

    {{ $path := (printf "/img/responsive/%v%v" ($.Scratch.Get "subname") $ext)}}
    {{ $.Scratch.SetInMap "imgs" .name (printf "%v %v" $path ($.Scratch.Get "spec")) }}

    {{ if not ($.Scratch.Get "maxsrc") }}
        {{ $.Scratch.Set "maxsrc" $path }}
    {{ else if and (isset . "height") (gt .height ($.Scratch.Get "maxsize")) }}
        {{ $.Scratch.Set "maxsrc" $path }}
        {{ $.Scratch.Set "maxsize" .height }}
    {{ else if and (isset . "width") (gt .width ($.Scratch.Get "maxsize")) }}
        {{ $.Scratch.Set "maxsrc" $path }}
        {{ $.Scratch.Set "maxsize" .width }}
    {{ end }}
{{ end }}
{{ $srcset := delimit ($.Scratch.GetSortedMapValues "imgs") ", " }}
{{ printf "<img src=\"%v\" srcset=\"%v\" sizes=\"%v\">" ($.Scratch.Get "maxsrc") $srcset (.Get "sizes") | safeHTML }}