<?php
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * MODULE: Performance Boost & Smart Speed Engine
 * Handles core WordPress debloating, script deferring, query string removal,
 * Heartbeat API throttling, and boots the unified AIO_Speed_HTML pipeline.
 */

// 1. Disable XML-RPC
if ( ! empty( aio_get_option( 'opt-perf-disable-xmlrpc' ) ) ) {
	add_filter( 'xmlrpc_enabled', '__return_false' );
	remove_action( 'wp_head', 'rsd_link' );
}

// 2. Control Heartbeat API
if ( ! empty( aio_get_option( 'opt-perf-control-heartbeat' ) ) ) {
	add_filter( 'heartbeat_settings', 'aio_tools_heartbeat_settings' );
	function aio_tools_heartbeat_settings( $settings ) {
		$interval             = absint( aio_get_option( 'optHeartbeatInterval', 60 ) );
		$settings['interval'] = $interval >= 15 ? $interval : 60;
		return $settings;
	}
}

// Frontend optimizations (skipped automatically when ?aio_no_opt=1 Safe Mode is active)
if ( ! aio_is_speed_safe_mode() ) {

	// 3. Disable Emojis
	if ( ! empty( aio_get_option( 'opt-perf-disable-emoji' ) ) ) {
		add_action( 'init', 'aio_tools_disable_emojis' );
		function aio_tools_disable_emojis() {
			remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
			remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
			remove_action( 'wp_print_styles', 'print_emoji_styles' );
			remove_action( 'admin_print_styles', 'print_emoji_styles' );

			// WP 6.4+ / WP 7.0 compatibility
			remove_action( 'embed_head', 'print_emoji_detection_script' );
			remove_action( 'wp_enqueue_scripts', 'wp_enqueue_emoji_styles' );
			remove_action( 'admin_enqueue_scripts', 'wp_enqueue_emoji_styles' );
			remove_action( 'enqueue_embed_scripts', 'wp_enqueue_emoji_styles' );
			remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
			remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
			remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
			add_filter( 'tiny_mce_plugins', 'aio_tools_disable_emojis_tinymce' );
			add_filter( 'wp_resource_hints', 'aio_tools_disable_emojis_dns_prefetch', 10, 2 );
		}
		function aio_tools_disable_emojis_tinymce( $plugins ) {
			return is_array( $plugins ) ? array_diff( $plugins, array( 'wpemoji' ) ) : array();
		}
		function aio_tools_disable_emojis_dns_prefetch( $urls, $relation_type ) {
			if ( 'dns-prefetch' === $relation_type && is_array( $urls ) ) {
				foreach ( $urls as $key => $url ) {
					$href = is_array( $url ) && isset( $url['href'] ) ? (string) $url['href'] : (string) $url;
					if ( false !== strpos( $href, 's.w.org' ) || false !== strpos( $href, 'images/core/emoji' ) ) {
						unset( $urls[ $key ] );
					}
				}
			}
			return $urls;
		}
	}

	// 4. Disable OEmbed Script & Discovery Links
	if ( ! empty( aio_get_option( 'opt-perf-disable-embed' ) ) ) {
		add_action( 'init', 'aio_tools_disable_oembed_head', 20 );
		add_action( 'wp_footer', 'aio_tools_deregister_scripts' );
		function aio_tools_disable_oembed_head() {
			remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
			remove_action( 'wp_head', 'wp_oembed_add_host_js' );
		}
		function aio_tools_deregister_scripts() {
			wp_deregister_script( 'wp-embed' );
		}
	}

	// 5. Disable Frontend Dashicons for Logged-out Visitors (preserves wp-login.php password eye toggle)
	if ( ! empty( aio_get_option( 'optDisableDashicons' ) ) ) {
		add_action( 'wp_enqueue_scripts', 'aio_tools_disable_guest_dashicons', 100 );
		function aio_tools_disable_guest_dashicons() {
			if ( is_user_logged_in() ) {
				return;
			}
			$pagenow = isset( $GLOBALS['pagenow'] ) ? $GLOBALS['pagenow'] : '';
			if ( $pagenow === 'wp-login.php' ) {
				return;
			}
			wp_dequeue_style( 'dashicons' );
			wp_deregister_style( 'dashicons' );
		}
	}

	// 6. Remove Frontend jQuery Migrate
	if ( ! empty( aio_get_option( 'optDisableJqueryMigrate' ) ) && ! is_admin() ) {
		add_action( 'wp_default_scripts', 'aio_tools_remove_jquery_migrate' );
		function aio_tools_remove_jquery_migrate( $scripts ) {
			if ( ! is_admin() && isset( $scripts->registered['jquery'] ) ) {
				$script = $scripts->registered['jquery'];
				if ( ! empty( $script->deps ) ) {
					$script->deps = array_diff( $script->deps, array( 'jquery-migrate' ) );
				}
			}
		}
	}

	// 7. Optional: Disable Gutenberg Block Library CSS on Frontend (for Classic / Elementor / Flatsome sites)
	if ( ! empty( aio_get_option( 'optDisableBlockCss' ) ) && ! is_admin() ) {
		add_action( 'wp_enqueue_scripts', 'aio_tools_disable_block_library_css', 100 );
		function aio_tools_disable_block_library_css() {
			wp_dequeue_style( 'wp-block-library' );
			wp_dequeue_style( 'wp-block-library-theme' );
			wp_dequeue_style( 'wc-blocks-style' );
			wp_dequeue_style( 'classic-theme-styles' );
		}
	}

	// 8. Defer Non-Critical JavaScript (compatible with WP 6.3+ Script Strategy API)
	if ( ! empty( aio_get_option( 'optEnableDeferJS' ) ) && ! is_admin() ) {
		add_filter( 'script_loader_tag', 'aio_tools_defer_async_scripts', 10, 3 );
		function aio_tools_defer_async_scripts( $tag, $handle, $src ) {
			if ( is_user_logged_in() || empty( $src ) ) {
				return $tag;
			}

			$exclude_handles = array(
				'wp-polyfill',
				'wc-checkout',
				'wc-cart',
				'wc-add-to-cart-variation',
			);
			if ( in_array( $handle, $exclude_handles, true ) ) {
				return $tag;
			}

			// Skip if script already has defer, async, WP strategy attribute, or custom non-JS type
			if ( preg_match( '/(?:^|\s)(?:defer|async|data-wp-strategy)(?:=|>|\s)/i', $tag ) ) {
				return $tag;
			}
			if ( stripos( $tag, 'challenges.cloudflare.com' ) !== false || stripos( $tag, 'recaptcha' ) !== false ) {
				return $tag;
			}

			return str_replace( ' src=', ' defer src=', $tag );
		}
	}

	// 9. Remove Query Strings (?ver=) from Static Resources for Guests
	if ( ! empty( aio_get_option( 'optEnableRemoveQueryString' ) ) && ! is_admin() ) {
		function aio_tools_remove_query_strings( $src ) {
			if ( ! is_user_logged_in() && is_string( $src ) && strpos( $src, '?ver=' ) !== false ) {
				$src = remove_query_arg( 'ver', $src );
			}
			return $src;
		}
		add_filter( 'style_loader_src', 'aio_tools_remove_query_strings', 10, 2 );
		add_filter( 'script_loader_src', 'aio_tools_remove_query_strings', 10, 2 );
	}

	// 10. Smart WooCommerce Cart Fragments Optimizer (skips ?wc-ajax=get_refreshed_fragments when cart is empty)
	if ( ! empty( aio_get_option( 'optOptimizeWcFragments' ) ) && class_exists( 'WooCommerce' ) && ! is_admin() ) {
		add_action( 'wp_enqueue_scripts', 'aio_tools_smart_wc_cart_fragments', 999 );
		function aio_tools_smart_wc_cart_fragments() {
			if ( function_exists( 'is_cart' ) && ( is_cart() || is_checkout() || is_account_page() ) ) {
				return;
			}
			if ( ! empty( $_COOKIE['woocommerce_items_in_cart'] ) ) {
				return;
			}
			if ( wp_script_is( 'wc-cart-fragments', 'enqueued' ) || wp_script_is( 'wc-cart-fragments', 'registered' ) ) {
				wp_dequeue_script( 'wc-cart-fragments' );
				add_action( 'wp_footer', 'aio_tools_wc_fragments_empty_fallback', 99 );
			}
		}
		function aio_tools_wc_fragments_empty_fallback() {
			?>
<script id="aio-wc-frag-helper" data-aio-no-delay="1">
(function(){if(typeof jQuery==="undefined")return;jQuery(document.body).on("added_to_cart",function(e,f){if(f&&typeof f==="object"){jQuery.each(f,function(k,v){try{jQuery(k).replaceWith(v);}catch(err){}});}});})();
</script>
			<?php
		}
	}

	// 11. Static CSS & JS Asset Minifier (writes cached .min.css / .min.js into uploads/aio-assets/)
	require_once dirname( __FILE__ ) . '/class-aio-asset-optimizer.php';
	new AIO_Asset_Optimizer();

	// 12. Self-Hosted Google Fonts Optimizer
	require_once dirname( __FILE__ ) . '/class-aio-font-optimizer.php';

	// 13. Boot Unified Smart Speed HTML Pipeline
	require_once dirname( __FILE__ ) . '/class-aio-speed-html.php';
	new AIO_Speed_HTML();
}