<?php
// phpcs:disable WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- WooCommerce cart cookie is read only as a boolean cache-bypass signal and is never rendered or persisted.
// phpcs:disable WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedConstantFound -- Compatibility checks reference third-party/WordPress constants that QW Optimize does not define.
namespace QWSpeedCache\Compatibility;

defined( 'ABSPATH' ) || exit;

/**
 * WooCommerce-specific cache exclusions and asset lightening (G-15 depth).
 */
class WooCommerce {

	public function __construct() {
		if ( ! class_exists( 'WooCommerce' ) ) {
			return;
		}

		add_filter( 'qwsc_cache_reject_uri_defaults', array( $this, 'default_uris' ) );
		add_action( 'init', array( $this, 'maybe_donotcache' ) );
		add_filter( 'qwsc_cache_sensitive_cookie_prefixes', array( $this, 'filter_sensitive_cookies' ) );

		$settings = \QWSpeedCache\Plugin::instance()->get_all_settings();

		if ( ! empty( $settings['woo_disable_cart_fragments'] ) ) {
			add_action( 'wp_enqueue_scripts', array( $this, 'disable_cart_fragments' ), 99 );
		}
		if ( ! empty( $settings['woo_dequeue_outside_shop'] ) ) {
			add_action( 'wp_enqueue_scripts', array( $this, 'dequeue_outside_shop' ), 100 );
		}
		if ( ! empty( $settings['woo_disable_password_strength'] ) ) {
			add_action( 'wp_enqueue_scripts', array( $this, 'disable_password_strength' ), 100 );
		}
		if ( ! empty( $settings['woo_disable_scripts_outside_checkout'] ) ) {
			add_action( 'wp_enqueue_scripts', array( $this, 'checkout_only_scripts' ), 101 );
		}

		// Purge product/shop caches when stock or product saved.
		add_action( 'woocommerce_update_product', array( $this, 'purge_product' ), 20, 1 );
		add_action( 'woocommerce_product_set_stock_status', array( $this, 'purge_product' ), 20, 1 );
		add_action( 'woocommerce_variation_set_stock_status', array( $this, 'purge_product' ), 20, 1 );

		add_filter( 'qwsc_js_protected_handles', array( $this, 'protected_handles' ) );
	}

	/**
	 * When empty-cart caching is allowed, drop session cookies from the "block all cache" list
	 * if the cart is empty (page cache can serve anonymous HTML).
	 *
	 * @param string[] $prefixes Prefixes.
	 * @return string[]
	 */
	public function filter_sensitive_cookies( $prefixes ) {
		$settings = \QWSpeedCache\Plugin::instance()->get_all_settings();
		$prefixes = is_array( $prefixes ) ? $prefixes : array();

		// Empty cart: allow anonymous page cache (session cookie alone is not enough to bypass).
		$allow_empty = ! empty( $settings['woo_cache_empty_cart'] ) || ! isset( $settings['woo_cache_empty_cart'] );
		if ( $allow_empty ) {
			$count = self::cart_item_count_from_request();
			if ( 0 === $count && ! self::has_woocommerce_session_cookie() ) {
				$drop = array( 'wp_woocommerce_session_', 'woocommerce_cart_hash', 'woocommerce_items_in_cart' );
				$prefixes = array_values(
					array_filter(
						$prefixes,
						function ( $p ) use ( $drop ) {
							return ! in_array( (string) $p, $drop, true );
						}
					)
				);
			}
		}
		return $prefixes;
	}

	/**
	 * Cart quantity from WC or cookies (no session start required).
	 *
	 * @return int
	 */
	/** Never treat an existing WooCommerce session as an anonymous cache-safe request. */
	private static function has_woocommerce_session_cookie() {
		foreach ( array_keys( $_COOKIE ) as $cookie_name ) {
			if ( 0 === strpos( (string) $cookie_name, 'wp_woocommerce_session_' ) ) {
				return true;
			}
		}
		return false;
	}

	public static function cart_item_count_from_request() {
		if ( did_action( 'wp_loaded' ) && function_exists( 'WC' ) && WC()->cart ) {
			return (int) WC()->cart->get_cart_contents_count();
		}
		if ( empty( $_COOKIE['woocommerce_items_in_cart'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return 0;
		}
		$v = isset( $_COOKIE['woocommerce_items_in_cart'] ) && is_scalar( $_COOKIE['woocommerce_items_in_cart'] )
			? sanitize_text_field( wp_unslash( (string) $_COOKIE['woocommerce_items_in_cart'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( '1' === $v || 'yes' === strtolower( $v ) ) {
			return 1;
		}
		return is_numeric( $v ) ? (int) $v : 1;
	}

	public function default_uris( $uris ) {
		$extra = array(
			'/cart',
			'/checkout',
			'/my-account',
			'/wc-api/',
			'/cart/',
			'/checkout/',
			'/my-account/',
			'/order-pay',
			'/order-received',
			'/add-to-cart',
		);
		return array_unique( array_merge( (array) $uris, $extra ) );
	}

	public function maybe_donotcache() {
		if ( function_exists( 'is_cart' ) && ( is_cart() || is_checkout() || is_account_page() ) ) {
			if ( ! defined( 'DONOTCACHEPAGE' ) ) {
				define( 'DONOTCACHEPAGE', true );
			}
		}
		if ( function_exists( 'is_wc_endpoint_url' ) && is_wc_endpoint_url() ) {
			if ( ! defined( 'DONOTCACHEPAGE' ) ) {
				define( 'DONOTCACHEPAGE', true );
			}
		}
	}

	/**
	 * Cart fragments AJAX is heavy; disable off cart/checkout/account when empty cart.
	 */
	public function disable_cart_fragments() {
		if ( $this->is_woo_endpoint() ) {
			return;
		}
		if ( function_exists( 'WC' ) && WC()->cart && WC()->cart->get_cart_contents_count() > 0 ) {
			return;
		}
		wp_dequeue_script( 'wc-cart-fragments' );
		wp_deregister_script( 'wc-cart-fragments' );
	}

	/**
	 * Dequeue Woo scripts/styles on non-commerce pages.
	 */
	public function dequeue_outside_shop() {
		if ( $this->is_woo_endpoint() ) {
			return;
		}
		$styles = array(
			'woocommerce-general',
			'woocommerce-layout',
			'woocommerce-smallscreen',
			'woocommerce_frontend_styles',
			'wc-blocks-style',
			'wc-blocks-vendors-style',
		);
		$scripts = array(
			'woocommerce',
			'wc-add-to-cart',
			'wc-cart-fragments',
			'wc-credit-card-form',
			'wc-single-product',
			'wc-checkout',
			'wc-cart',
			'wc-chosen',
			'prettyPhoto',
			'prettyPhoto-init',
			'jquery-blockui',
			'jquery-placeholder',
			'jquery-payment',
			'js-cookie',
			'wc-order-attribution',
			'sourcebuster-js',
			'wc-add-to-cart-variation',
			'zoom',
			'flexslider',
			'photoswipe',
			'photoswipe-ui-default',
			'wc-password-strength-meter',
		);
		foreach ( $styles as $h ) {
			wp_dequeue_style( $h );
			wp_deregister_style( $h );
		}
		foreach ( $scripts as $h ) {
			wp_dequeue_script( $h );
			wp_deregister_script( $h );
		}
	}

	/**
	 * Password strength meter only on account / lost password screens.
	 */
	public function disable_password_strength() {
		if ( function_exists( 'is_account_page' ) && is_account_page() ) {
			return;
		}
		wp_dequeue_script( 'wc-password-strength-meter' );
		wp_deregister_script( 'wc-password-strength-meter' );
	}

	/**
	 * Heavy checkout-only libraries off product/shop listing pages.
	 */
	public function checkout_only_scripts() {
		if ( function_exists( 'is_checkout' ) && is_checkout() ) {
			return;
		}
		if ( function_exists( 'is_cart' ) && is_cart() ) {
			return;
		}
		$handles = array(
			'wc-credit-card-form',
			'jquery-payment',
			'wc-checkout',
			'selectWoo',
			'select2',
			'wc-country-select',
			'wc-address-i18n',
		);
		foreach ( $handles as $h ) {
			wp_dequeue_script( $h );
		}
	}

	/**
	 * @param int|\WC_Product $product Product.
	 */
	public function purge_product( $product ) {
		$id = 0;
		if ( is_object( $product ) && method_exists( $product, 'get_id' ) ) {
			$id = (int) $product->get_id();
		} else {
			$id = (int) $product;
		}
		if ( $id <= 0 ) {
			return;
		}
		if ( class_exists( '\QWSpeedCache\Cache\Purge' ) ) {
			$purge = new \QWSpeedCache\Cache\Purge();
			if ( method_exists( $purge, 'purge_urls' ) ) {
				$urls = array( get_permalink( $id ) );
				if ( function_exists( 'wc_get_page_id' ) ) {
					$shop = (int) wc_get_page_id( 'shop' );
					if ( $shop > 0 ) {
						$urls[] = get_permalink( $shop );
					}
				}
				$urls[] = home_url( '/' );
				$purge->purge_urls( array_filter( $urls ) );
			}
		}
	}

	/**
	 * @return bool
	 */
	private function is_woo_endpoint() {
		if ( function_exists( 'is_cart' ) && ( is_cart() || is_checkout() || is_account_page() ) ) {
			return true;
		}
		if ( function_exists( 'is_product' ) && is_product() ) {
			return true;
		}
		if ( function_exists( 'is_shop' ) && is_shop() ) {
			return true;
		}
		if ( function_exists( 'is_product_category' ) && ( is_product_category() || is_product_tag() ) ) {
			return true;
		}
		if ( function_exists( 'is_product_taxonomy' ) && is_product_taxonomy() ) {
			return true;
		}
		return false;
	}

	/**
	 * Pure: should cart fragments load?
	 *
	 * @param bool $is_woo_page Is commerce page.
	 * @param int  $cart_count  Cart item count.
	 * @return bool
	 */
	public static function should_load_cart_fragments( $is_woo_page, $cart_count ) {
		if ( $is_woo_page ) {
			return true;
		}
		return (int) $cart_count > 0;
	}

	/**
	 * @param string[] $handles Handles.
	 * @return string[]
	 */
	public function protected_handles( $handles ) {
		$woo = array(
			'woocommerce',
			'wc-add-to-cart',
			'wc-cart-fragments',
			'wc-checkout',
			'wc-cart',
			'wc-single-product',
			'stripe',
			'wc-stripe-upe-classic',
			'jquery-blockui',
			'js-cookie',
			'selectWoo',
			'wc-password-strength-meter',
		);
		return array_values( array_unique( array_merge( (array) $handles, $woo ) ) );
	}


}