<?php
/**
 * Front-end widget rendering — registration, shortcode, and site-wide injection.
 *
 * The 2.1.6 behavior, plus the Display rules added in 2.5 (where, for whom,
 * on which devices, how early). Their defaults reproduce 2.4 exactly, so a site
 * that never opens Display rules behaves as before.
 *
 * @package Aivastark_Widget
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Register the widget script with WordPress (enqueued on demand).
 */
add_action(
	'wp_enqueue_scripts',
	function () {
		wp_register_script(
			'aivastark-widget',
			aivastark_widget_script_url(),
			array(),
			AIVASTARK_WIDGET_VERSION,
			true
		);
	}
);

/**
 * Shortcode: [aivastark key="..."]
 */
add_shortcode(
	'aivastark',
	function ( $atts ) {
		$atts = shortcode_atts( array( 'key' => '' ), $atts, 'aivastark' );
		$key  = sanitize_text_field( (string) $atts['key'] );
		// The on/off switch and the audience rules apply here too; page rules
		// don't, because placing the shortcode on a page is itself a page rule.
		if ( aivastark_widget_should_render( true ) ) {
			aivastark_widget_enqueue( $key );
		}
		return '';
	}
);

/**
 * Site-wide rendering — runs on every front-end page when a key is configured.
 *
 * Must hook on wp_enqueue_scripts (not wp_footer): WordPress prints footer
 * scripts at wp_footer priority 20, so anything enqueued later in wp_footer
 * silently never reaches the page. Priority 20 here fires after the script
 * registration above (default priority 10).
 */
add_action(
	'wp_enqueue_scripts',
	function () {
		if ( is_admin() ) {
			return;
		}
		$opts = aivastark_widget_get_options();
		$key  = trim( (string) $opts['widget_key'] );
		if ( '' === $key ) {
			return;
		}
		if ( ! aivastark_widget_should_render( false ) ) {
			return;
		}
		aivastark_widget_enqueue( $key );
	},
	20
);

/**
 * Whether the Display rules let the widget load on this request.
 *
 * Filterable: `aivastark_widget_should_render` receives the decision, the
 * options and the request context, for rules the settings screen can't express
 * (a membership level, a cookie, an A/B bucket).
 *
 * @param bool $shortcode Whether the [aivastark] shortcode is asking.
 * @return bool
 */
function aivastark_widget_should_render( $shortcode ) {
	$opts = aivastark_widget_get_options();
	$ctx  = Aivastark_Widget_Display_Rules::context( $shortcode );
	return (bool) apply_filters(
		'aivastark_widget_should_render',
		Aivastark_Widget_Display_Rules::decide( $opts, $ctx ),
		$opts,
		$ctx
	);
}