{#- chirp-ui: Shimmer Button
    Button with animated shimmer overlay effect.

    Usage:
        from "chirpui/shimmer_button.html" import shimmer_button

        shimmer_button("Get Started")
        shimmer_button("Subscribe", variant="primary", size="lg")
        shimmer_button("Learn More", href="/docs", icon="→")
-#}

{% def shimmer_button(text, variant="", size="", icon=none, href=none, cls="",
           type="button", attrs="", attrs_map=none, disabled=false) %}
{% set variant = variant | validate_variant(("", "default", "primary"), "") %}
{% set size = size | validate_variant(("", "sm", "md", "lg"), "") %}
{% set variant_class = " chirpui-shimmer-btn--" ~ variant if variant else "" %}
{% set size_class = " chirpui-shimmer-btn--" ~ size if size else "" %}
{% set base = "chirpui-shimmer-btn" ~ variant_class ~ size_class ~ (" " ~ cls if cls else "") %}
{% if href %}
<a href="{{ href }}" class="{{ base }}"
   {% if disabled %}aria-disabled="true" tabindex="-1"{% end %}
   {{ attrs | html_attrs }}
   {{ attrs_map | html_attrs }}>
    <span class="chirpui-shimmer-btn__shimmer" aria-hidden="true"></span>
    {% if icon %}<span class="chirpui-shimmer-btn__icon">{{ icon | icon }}</span>{% end %}
    {{ text }}
</a>
{% else %}
<button type="{{ type }}" class="{{ base }}"
        {% if disabled %}disabled{% end %}
        {{ attrs | html_attrs }}
        {{ attrs_map | html_attrs }}>
    <span class="chirpui-shimmer-btn__shimmer" aria-hidden="true"></span>
    {% if icon %}<span class="chirpui-shimmer-btn__icon">{{ icon | icon }}</span>{% end %}
    {{ text }}
</button>
{% end %}
{% end %}