{{/*
  HugoBlox Theme Engine: Loads and validates a HugoBlox theme pack
  
  Input: Theme pack name (string), e.g. "minimal" or "acme/corporate"
  
  Returns: The theme data object (type, light, dark, etc.) or nil if invalid
  
  Validates:
    - Theme exists in data/themes/
    - Required 'hugoblox' wrapper is present
    - Required 'meta.format' starts with 'hugoblox-theme@'
*/}}

{{ $pack_name := . }}
{{ $result := dict }}

{{/* Parse vendor/name format */}}
{{ $vendor := "" }}
{{ $name := $pack_name }}

{{ if strings.Contains $pack_name "/" }}
  {{ $parts := split $pack_name "/" }}
  {{ $vendor = index $parts 0 }}
  {{ $name = index $parts 1 }}
{{ end }}

{{/* Load raw theme data */}}
{{ $raw_theme := dict }}

{{ if $vendor }}
  {{/* Third-party theme: data/themes/vendor/name.yaml */}}
  {{ $vendor_themes := index hugo.Data.themes $vendor }}
  {{ if $vendor_themes }}
    {{ $raw_theme = index $vendor_themes $name }}
  {{ end }}
{{ else }}
  {{/* Built-in or user theme: data/themes/name.yaml */}}
  {{ $raw_theme = index hugo.Data.themes $name }}
{{ end }}

{{/* Validate theme structure */}}
{{ if not $raw_theme }}
  {{ warnf "THEME ERROR: Theme pack '%s' not found in data/themes/" $pack_name }}
{{ else if not $raw_theme.hugoblox }}
  {{ warnf "THEME ERROR: Theme '%s' is not a valid HugoBlox theme (missing 'hugoblox' key)" $pack_name }}
{{ else }}
  {{ $theme := $raw_theme.hugoblox }}
  
  {{/* Validate format version */}}
  {{ $format := $theme.meta.format | default "" }}
  {{ if not (hasPrefix $format "hugoblox-theme@") }}
    {{ warnf "THEME ERROR: Theme '%s' has invalid format '%s'. Expected 'hugoblox-theme@1'" $pack_name $format }}
  {{ end }}
  
  {{/* Return the validated theme data (without the hugoblox wrapper) */}}
  {{ $result = $theme }}
{{ end }}

{{ return $result }}