<!-- 
    Displays a navigation header with a toggler. The menu items are derived from the site's configuration. Nested items
    are supported at one-level depth. The navigation bar includes a search area and a language switcher if applicable.
    The shortcode supports the following arguments:
    "id"            Optional id of the navbar toggler, defaults to "navbar-collapse-n" with a sequential number n
                    starting at 1.
    "path"          Required path of the active page.
    "menus"         Optional name of the menu configuration, defaults to "main".
    "size"          Optional breakpoint of the navbar toggler, either "xs", "sm", "md" (default), "lg", or "xl".
    "style"         Optional style of the navbar, either "light" (default) or "dark".
    "color"         Optional background color of the navbar, either "primary", "secondary", "success",
                    "danger", "warning", "info", "white", "black", "body", or "body-tertiary". The default color is
                    none.
    "mode"          Optional flag to include a color mode switcher, default is "true" (if dark mode is enabled).
    "search"        Optional flag to include a search input, default is "true".
    "logo"          Optional address of the logo image.
    "title"         Optional brand title, displayed when the logo is not set.
    "class":        Optional class attribute of the navbar container.
-->

{{ $error := false }}
{{ $supportedColors := slice "primary" "secondary" "success" "danger" "warning" "info" "white" "black" "body" "body" "body-tertiary" -}}
{{ $supportedFlags := slice "true" "false" -}}

{{- $id := printf "navbar-collapse-%d" (add .Ordinal 1) -}}
{{ with .Get "id" }}
    {{ $id = . }}
{{ end }}

{{ $path := .Get "path" | default "" }}
{{ $page := .Site.GetPage $path }}
{{ if not $page }}
    {{ errorf "Invalid or missing value for param 'path': %s" $path -}}
    {{ errorf " - Location: %s" .Position -}}
    {{ $error = true -}}
{{ end }}

{{ $menus := "main" -}}
{{ with .Get "menus" }}{{ $menus = .}}{{ end -}}

{{ $size := "md" -}}
{{ with .Get "size" }}{{ $size = . }}{{ end -}}
{{ $supportedSizes := slice "xs" "sm" "md" "lg" "xl" -}}
{{ if not (in $supportedSizes $size) -}}
    {{ errorf "Invalid value for param 'size': %s" $size -}}
    {{ $error = true -}}
{{ end -}}

{{ $style := "light" -}}
{{ with .Get "style" }}{{ $style = . }}{{ end -}}
{{ $supportedStyles := slice "light" "dark" -}}
{{ if not (in $supportedStyles $style) -}}
    {{ errorf "Invalid value for param 'style': %s" $style -}}
    {{ $error = true -}}
{{ end -}}

{{ $inverseStyle := "light" -}}
{{ if eq $style "light" }}{{ $inverseStyle = "dark" }}{{ end -}}

{{ $color := "" -}}
{{ with .Get "color" }}
    {{ $color = . }}
    {{ if not (in $supportedColors $color) -}}
        {{ errorf "Invalid value for param 'color': %s" $color -}}
        {{ $error = true -}}
    {{ end -}}
{{ end -}}

{{ $searchParam := "true" -}}
{{ with .Get "search" }}{{ $searchParam = . }}{{ end -}}
{{ if not (in $supportedFlags $searchParam) -}}
    {{ errorf "Invalid value for param 'search': %s" .Position -}}
    {{ $error = true -}}
{{ end -}}

{{ $modeParam := "true" -}}
{{ with .Get "mode" }}{{ $modeParam = . }}{{ end -}}
{{ if not (in $supportedFlags $modeParam) -}}
    {{ errorf "Invalid value for param 'mode': %s" .Position -}}
    {{ $error = true -}}
{{ end -}}

{{ $logo := "" -}}
{{ with .Get "logo" }}{{ $logo = . }}{{ end -}}

{{ $title := "" -}}
{{ with .Get "title" }}{{ $title = . }}{{ end -}}

{{- $class := .Get "class" | default "" -}}

{{ if not $error -}}
    {{- partial "assets/navbar.html" (dict 
        "id" $id 
        "page" $page
        "size" $size
        "style" $style
        "color" $color
        "search" $searchParam
        "mode" $modeParam
        "menus" $menus
        "logo" $logo
        "title" $title
        "class" $class
        )
    -}}
{{ end -}}