{{ $pages := where .context.Site.RegularPages "Type" "in" (slice "posts") }}
{{ $count := len $pages }}
{{ $param_name := .param_name }}

{{ $totalWidth := 200.0 }}
{{ $totalHeight := 150.0 }}
{{ $width := div $totalWidth  ( len ( $pages.GroupByDate "2006" ) ) }}

{{ $maxCount := 0 }}
{{ $totalCount := 0 }}
{{ $actualCount := 0 }}

{{ $maxDistance_km := 0 }}
{{ $totalDistance_km := 0 }}
{{ $actualDistance_km := 0 }}

{{ $maxAscent_m := 0 }}
{{ $totalAscent_m := 0 }}
{{ $actualAscent_m := 0 }}

{{ $maxMembers := 0 }}
{{ $totalMembers := 0 }}
{{ $actualMembers := 0 }}

{{ range sort ( $pages.GroupByDate "2006" ) "Key" }}
  {{ $count := 0 }}
  {{ $distance_km := 0 }}
  {{ $ascent_m := 0 }}
  {{ $members := 0 }}

  {{ range .Pages }}
    {{ $count = add 1 $count }}
    
    {{ with .Params.distance_km }}
      {{ $distance_km = add . $distance_km }}
    {{ end }}

    {{ with .Params.ascent_m }}
      {{ $ascent_m = add . $ascent_m }}
    {{ end }}

    {{ with .Params.members }}
      {{ $members = add ( len . ) $members }}
    {{ end }}

  {{ end }}

  {{ if gt $distance_km $maxDistance_km }}
    {{  $maxDistance_km = $distance_km }}
  {{ end }}

  {{ if gt $ascent_m $maxAscent_m }}
    {{  $maxAscent_m = $ascent_m }}
  {{ end }}

  {{ if gt $count $maxCount }}
    {{  $maxCount = $count }}
  {{ end }}

  {{ if gt $members $maxMembers }}
    {{  $maxMembers = $members }}
  {{ end }}

  {{ $totalCount = add $count $totalCount }}
  {{ $totalMembers = add $members $totalMembers }}
  {{ $totalDistance_km = add $distance_km $totalDistance_km }}  
  {{ $totalAscent_m = add $ascent_m $totalAscent_m }}  
  
  {{ $actualCount = $count }}
  {{ $actualMembers = $members }}
  {{ $actualDistance_km = $distance_km }}
  {{ $actualAscent_m = $ascent_m }}

{{ end }}

{{ $value := "" }}
{{ $actualHeight := 0 }}

{{ if eq $param_name "distance_km"}}
  {{ $value = partial "func/NumberFormatter.html" ( dict  "number" $totalDistance_km  "precision" 0 ) }}
  {{ $actualHeight = mul $actualDistance_km ( div $totalHeight $maxDistance_km ) }}
{{ end }}

{{ if eq $param_name "ascent_m"}}
  {{ $value = partial "func/NumberFormatter.html" ( dict  "number" $totalAscent_m  "precision" 0 ) }}
  {{ $actualHeight = mul $actualAscent_m ( div $totalHeight $maxAscent_m ) }}
{{ end }}

{{ if eq $param_name "count"}}
  {{ $value = $totalCount }}
  {{ $actualHeight = mul $actualCount ( div $totalHeight $maxCount ) }}
{{ end }}

{{ if eq $param_name "members"}}
  {{ $value = $totalMembers }}
  {{ $actualHeight = mul $actualMembers ( div $totalHeight $maxMembers ) }}
{{ end }}

{{ $color := "#a8c7f0" }}
{{ $fontcolor := "#123a6d" }}
{{ $fontstroke := "#e9f1fb" }}
{{ $actualColor := "#123a6d" }}

<svg width="{{ $totalWidth }}px" height="{{ $totalHeight }}px" xmlns="http://www.w3.org/2000/svg">
  <rect height="100%" width="100%" opacity="0.1" fill="{{ $color }}"/>

  {{ $x := 0 }}
  {{ range sort ( $pages.GroupByDate "2006" ) "Key" }}
  
    {{ $count := 0 }}
    {{ $distance_km := 0 }}
  
    {{ range .Pages }}
  
      {{ with .Params.distance_km }}
        {{ $distance_km = add . $distance_km }}
      {{ end }}
  
      {{ $count = add 1 $count }}
    
    {{ end }}
    
    {{ $height := 0 }}
    {{ $height = mul (float $totalHeight ) ( div (float $count ) ( float $maxCount ) )  }}
  
    <rect opacity="0.2" height="{{ $height }}" y="{{ sub $totalHeight $height }}" x="{{ $x }}px" 
      width="{{ $width }}px"  fill="{{ $color }}" stroke-width="0"  />

    {{ $x = add $x $width }}
  {{ end }}

  <rect opacity="0.8" height="5px" y="{{ sub $totalHeight $actualHeight }}" x="0px" 
      width="{{ $totalWidth }}px"  fill="{{ $actualColor }}" stroke-width="0"  />

  <text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle" font-size="50px" 
  font-weight="bold" fill="{{ $fontcolor }}" stroke-width="1px" stroke="{{$fontstroke}}">{{ $value }}</text>   
</svg>