Hide billing address section when cart total is zero (free products)

Hide billing address section when cart total is zero (free products)

<?php
/**
 * Hide billing address section when cart total is zero (free products)
 */

$hide_billing_init = function() {
	static $done = false;
	if ( $done ) return;
	$done = true;
	
	// Check if cart needs payment
	$needs_payment = WC()->cart && ! WC()->cart->is_empty() && WC()->cart->needs_payment();
	
	// Remove billing field validation when no payment needed
	if ( ! $needs_payment ) {
		add_filter( 'wfacp_checkout_fields', function( $fields ) {
			if ( isset( $fields['billing'] ) ) {
				foreach ( $fields['billing'] as $key => &$field ) {
					unset( $field['required'], $field['validate'] );
				}
			}
			return $fields;
		}, 99999 );
	}
	
	// Add CSS/JS in footer
	add_action( 'wp_footer', function() use ( $needs_payment ) {
		?>
		<script>
		(function($) {
			function toggleBilling(needsPayment) {
				var $section = $('.wfacp_divider_billing').parents('.wfacp-section');
				if ($section.length) {
					$section.toggle(needsPayment);
				}
			}
			
			// Initial state from PHP
			toggleBilling(<?php echo $needs_payment ? 'true' : 'false'; ?>);
			
			// Update on AJAX (coupon applied, etc.)
			if (typeof wfacp_frontend !== 'undefined' && wfacp_frontend.hooks) {
				wfacp_frontend.hooks.addAction('wfacp_ajax_response', function(fragments, data) {
					if (data && typeof data.needs_payment !== 'undefined') {
						toggleBilling(data.needs_payment);
					}
				});
			}
		})(jQuery);
		</script>
		<?php
	}, 999 );
};

add_action( 'wfacp_before_process_checkout_template_loader', $hide_billing_init );
add_action( 'wfacp_after_checkout_page_found', $hide_billing_init );