{#- chirp-ui: ASCII Checkbox
    Checkbox styled with Unicode ballot characters.

    Usage:
        from "chirpui/ascii_checkbox.html" import ascii_checkbox, ascii_checkbox_group

        ascii_checkbox("terms", label="Accept terms")
        ascii_checkbox("notify", label="Email notifications", checked=true)

        call ascii_checkbox_group(legend="Options")
            ascii_checkbox("opt_a", label="Enable logging")
            ascii_checkbox("opt_b", label="Verbose output", checked=true)
            ascii_checkbox("opt_c", label="Auto-restart")
        end

    Variants: default, accent, success, danger.
-#}

{% def ascii_checkbox(name, label=none, checked=false, variant="", disabled=false, cls="") %}
{% set variant = variant | validate_variant(("", "default", "accent", "success", "danger"), "") %}
{% set variant_class = " chirpui-ascii-checkbox--" ~ variant if variant and variant != "default" else "" %}
<label class="chirpui-ascii-checkbox{{ variant_class }}{{ " chirpui-ascii-checkbox--disabled" if disabled else "" }}{{ " " ~ cls if cls else "" }}">
    <input class="chirpui-ascii-checkbox__input chirpui-visually-hidden"
           type="checkbox" name="{{ name }}" id="{{ name }}"
           {% if checked %}checked{% end %}
           {% if disabled %}disabled{% end %}>
    <span class="chirpui-ascii-checkbox__box" aria-hidden="true"></span>
    {% if label %}<span class="chirpui-ascii-checkbox__label">{{ label }}</span>{% end %}
</label>
{% end %}

{% def ascii_checkbox_group(legend=none, cls="") %}
<fieldset class="chirpui-ascii-checkbox-group{{ " " ~ cls if cls else "" }}">
    {% if legend %}<legend class="chirpui-ascii-checkbox-group__legend">{{ legend }}</legend>{% end %}
    {% slot %}
</fieldset>
{% end %}