<?php
/**
 * Page-cache adapters — after a purge (`aooshop_after_purge`) drop the same pages from whatever full-page cache the site
 * runs, so visitors don't keep seeing the old price from a static copy. Each adapter only runs when its plugin's
 * API exists (function_exists / has_action). Verified against installed sources:
 *   SiteGround Optimizer 7.8 — `\SiteGround_Optimizer\Supercacher\Supercacher::purge_cache_request( $url, $include_child_paths )`
 *     (public static; also clears its file cache) · everything: `sg_cachepress_purge_everything()` · fallback
 *     `sg_cachepress_purge_cache( $url )` (the helper always includes child paths)
 *   LiteSpeed Cache — `litespeed_tag_add` (our route responses get tag `aoo_shop`) · `litespeed_purge` (tag) ·
 *     `litespeed_purge_url` · `litespeed_purge_all`
 *   WP Super Cache — `wpsc_delete_url_cache( $url )` (that URL + its /page/ children) · tree: `prune_super_cache()` on
 *     the URL's directory under `get_supercache_dir()`
 *   WP Rocket — `rocket_clean_files( $urls )` · `rocket_clean_domain()` (not installed locally — API per WP Rocket docs)
 *   W3 Total Cache — `w3tc_flush_url( $url )` · `w3tc_flush_all()` (not installed locally — API per W3TC docs)
 *
 * Targets: `null` = everything the shop serves (purge "all" / admin "ล้างแคช") → shop route trees + card posts.
 * Otherwise {urls:[exact URLs]} from class-purge.php.
 * `aooshop_host_cache_purge` filter (bool, $adapter, $targets) — return false to skip an adapter (dry-run / tests);
 * the adapters that ran are recorded (last_calls()) and shown in the admin status.
 *
 * @package AooShop
 */

defined( 'ABSPATH' ) || exit;

class AooShop_Host_Cache {

	const CARD_POSTS = 'aooshop_card_posts';
	const LS_TAG     = 'aooshop';
	const MAX_URLS   = 300;

	/** @var AooShop_Settings */
	private $settings;
	/** @var AooShop_Router */
	private $router;
	/** @var array */
	private $last = array();

	public function __construct( AooShop_Settings $settings, AooShop_Router $router ) {
		$this->settings = $settings;
		$this->router   = $router;
	}

	public function hooks() {
		add_action( 'aooshop_after_purge', array( $this, 'after_purge' ), 20, 3 );
		add_action( 'aooshop_route_ready', array( $this, 'tag_response' ) );
		add_action( 'save_post', array( $this, 'forget_card_posts' ) );
		add_action( 'deleted_post', array( $this, 'forget_card_posts' ) );
	}

	/** Which page caches this site has (status / health). @return string[] */
	public function detected() {
		$out = array();
		if ( function_exists( 'sg_cachepress_purge_cache' ) ) {
			$out[] = 'sg-optimizer';
		}
		if ( has_action( 'litespeed_purge_url' ) || defined( 'LSCWP_V' ) ) {
			$out[] = 'litespeed';
		}
		if ( function_exists( 'wpsc_delete_url_cache' ) || function_exists( 'wp_cache_clear_cache' ) ) {
			$out[] = 'wp-super-cache';
		}
		if ( function_exists( 'rocket_clean_files' ) || function_exists( 'rocket_clean_domain' ) ) {
			$out[] = 'wp-rocket';
		}
		if ( function_exists( 'w3tc_flush_url' ) || function_exists( 'w3tc_flush_all' ) ) {
			$out[] = 'w3tc';
		}
		return $out;
	}

	public function last_calls() {
		return $this->last;
	}

	/** LiteSpeed: tag every aoo route response so a purge can drop them all by tag. */
	public function tag_response() {
		if ( has_action( 'litespeed_tag_add' ) ) {
			do_action( 'litespeed_tag_add', self::LS_TAG ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- LiteSpeed Cache hook.
		}
	}

	// ── article-card posts ────────────────────────────────────────────

	public function forget_card_posts() {
		delete_transient( self::CARD_POSTS );
	}

	/** Published posts/pages that show aoo cards / collections / chips (shortcode, block or Elementor widget) — cached 12 h. */
	public function card_post_urls() {
		$ids = get_transient( self::CARD_POSTS );
		if ( ! is_array( $ids ) ) {
			global $wpdb;
			// phpcs:disable WordPress.DB.DirectDatabaseQuery
			$a   = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} WHERE post_status = 'publish' AND post_type NOT IN ('revision','nav_menu_item','attachment') AND (post_content LIKE '%[aooshop_product%' OR post_content LIKE '%[aooshop_collections%' OR post_content LIKE '%[aooshop_chips%' OR post_content LIKE '%<!-- wp:aoo-shop/%' OR post_content LIKE '%[aoo_product%' OR post_content LIKE '%[aoocommerce_products%' OR post_content LIKE '%[aoo_collections%' OR post_content LIKE '%[aoo_chips%' OR post_content LIKE '%<!-- wp:aoo/%') LIMIT 500" );
			$b   = $wpdb->get_col( "SELECT pm.post_id FROM {$wpdb->postmeta} pm INNER JOIN {$wpdb->posts} p ON p.ID = pm.post_id AND p.post_status = 'publish' WHERE pm.meta_key = '_elementor_data' AND (pm.meta_value LIKE '%\"widgetType\":\"aoo-shop-products\"%' OR pm.meta_value LIKE '%\"widgetType\":\"aoo-shop-collections\"%' OR pm.meta_value LIKE '%\"widgetType\":\"aoo-products\"%' OR pm.meta_value LIKE '%\"widgetType\":\"aoo-collections\"%' OR pm.meta_value LIKE '%[aooshop_product%' OR pm.meta_value LIKE '%[aooshop_collections%' OR pm.meta_value LIKE '%[aooshop_chips%' OR pm.meta_value LIKE '%[aoo_product%' OR pm.meta_value LIKE '%[aoo_collections%' OR pm.meta_value LIKE '%[aoo_chips%') LIMIT 500" );
			// phpcs:enable
			$ids = array_values( array_unique( array_map( 'intval', array_merge( (array) $a, (array) $b ) ) ) );
			set_transient( self::CARD_POSTS, $ids, 12 * HOUR_IN_SECONDS );
		}
		$urls = array();
		foreach ( $ids as $id ) {
			$u = get_permalink( $id );
			if ( $u ) {
				$urls[] = $u;
			}
		}
		return $urls;
	}

	// ── purge ─────────────────────────────────────────────────────────

	/** Route roots (with children) — what "everything the shop serves" means for a page cache. */
	private function trees() {
		$p    = $this->settings->paths();
		$home = untrailingslashit( home_url() );
		$out  = array();
		foreach ( AooShop_Settings::PATH_KEYS as $k ) {
			$out[] = $home . $p[ $k ] . '/';
		}
		return array_values( array_unique( $out ) );
	}

	private function allowed( $adapter, $targets ) {
		return (bool) apply_filters( 'aooshop_host_cache_purge', true, $adapter, $targets );
	}

	/**
	 * @param int           $count   Pages dropped from our cache.
	 * @param callable|null $match   Matcher used.
	 * @param array|null    $targets {urls:string[], trees?:string[]} · null = everything.
	 */
	public function after_purge( $count = 0, $match = null, $targets = null ) {
		$urls  = array();
		$trees = array();
		if ( is_array( $targets ) ) {
			$urls  = isset( $targets['urls'] ) ? array_values( array_unique( (array) $targets['urls'] ) ) : array();
			$trees = isset( $targets['trees'] ) ? (array) $targets['trees'] : array();
			if ( count( $urls ) > self::MAX_URLS ) {
				$urls  = $this->card_post_urls();
				$trees = $this->trees();
			}
		} else {
			$urls  = $this->card_post_urls();
			$trees = $this->trees();
		}
		$t          = array( 'urls' => $urls, 'trees' => $trees );
		$this->last = array();

		// SiteGround Optimizer.
		if ( function_exists( 'sg_cachepress_purge_cache' ) && $this->allowed( 'sg-optimizer', $t ) ) {
			$exact = class_exists( '\SiteGround_Optimizer\Supercacher\Supercacher' ) && is_callable( array( '\SiteGround_Optimizer\Supercacher\Supercacher', 'purge_cache_request' ) );
			foreach ( $trees as $url ) {
				sg_cachepress_purge_cache( $url ); // Includes child paths.
			}
			foreach ( $urls as $url ) {
				if ( $exact ) {
					\SiteGround_Optimizer\Supercacher\Supercacher::purge_cache_request( $url, false );
				} else {
					sg_cachepress_purge_cache( $url );
				}
			}
			$this->last[] = 'sg-optimizer';
		}

		// LiteSpeed Cache.
		if ( ( has_action( 'litespeed_purge_url' ) || has_action( 'litespeed_purge' ) ) && $this->allowed( 'litespeed', $t ) ) {
			if ( $trees ) {
				do_action( 'litespeed_purge', self::LS_TAG ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- LiteSpeed Cache hook.
			}
			foreach ( $urls as $url ) {
				do_action( 'litespeed_purge_url', $url ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- LiteSpeed Cache hook.
			}
			$this->last[] = 'litespeed';
		}

		// WP Super Cache.
		if ( function_exists( 'wpsc_delete_url_cache' ) && $this->allowed( 'wp-super-cache', $t ) ) {
			foreach ( $urls as $url ) {
				wpsc_delete_url_cache( $url );
			}
			if ( $trees && function_exists( 'get_supercache_dir' ) && function_exists( 'prune_super_cache' ) ) {
				$base = untrailingslashit( get_supercache_dir() );
				foreach ( $trees as $url ) {
					$path = (string) wp_parse_url( $url, PHP_URL_PATH );
					$dir  = $base . '/' . trim( $path, '/' );
					if ( '' !== trim( $path, '/' ) && false === strpos( $path, '..' ) && is_dir( $dir ) ) {
						prune_super_cache( $dir, true );
					}
				}
			}
			$this->last[] = 'wp-super-cache';
		}

		// WP Rocket.
		if ( function_exists( 'rocket_clean_files' ) && $this->allowed( 'wp-rocket', $t ) ) {
			$list = array_merge( $trees, $urls );
			if ( $list ) {
				rocket_clean_files( $list );
			}
			$this->last[] = 'wp-rocket';
		}

		// W3 Total Cache.
		if ( ( function_exists( 'w3tc_flush_url' ) || function_exists( 'w3tc_flush_all' ) ) && $this->allowed( 'w3tc', $t ) ) {
			if ( $trees && function_exists( 'w3tc_flush_all' ) ) {
				w3tc_flush_all(); // No prefix purge in W3TC's public API.
			} elseif ( function_exists( 'w3tc_flush_url' ) ) {
				foreach ( $urls as $url ) {
					w3tc_flush_url( $url );
				}
			}
			$this->last[] = 'w3tc';
		}

		do_action( 'aooshop_host_cache_purged', $this->last, $t );
	}

	/**
	 * Whole-site purge of the host page cache — only after (re)connecting to aoo (every page may show shop links /
	 * cards from the old connection). Public APIs of each plugin; adapters can be skipped with the same filter.
	 *
	 * @return string[] Adapters that ran.
	 */
	public function purge_everything() {
		$t   = array( 'everything' => true );
		$ran = array();
		if ( function_exists( 'sg_cachepress_purge_everything' ) && $this->allowed( 'sg-optimizer', $t ) ) {
			sg_cachepress_purge_everything();
			$ran[] = 'sg-optimizer';
		}
		if ( ( has_action( 'litespeed_purge_all' ) || defined( 'LSCWP_V' ) ) && $this->allowed( 'litespeed', $t ) ) {
			do_action( 'litespeed_purge_all' ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- LiteSpeed Cache hook.
			$ran[] = 'litespeed';
		}
		if ( function_exists( 'wp_cache_clear_cache' ) && $this->allowed( 'wp-super-cache', $t ) ) {
			wp_cache_clear_cache();
			$ran[] = 'wp-super-cache';
		}
		if ( function_exists( 'rocket_clean_domain' ) && $this->allowed( 'wp-rocket', $t ) ) {
			rocket_clean_domain();
			$ran[] = 'wp-rocket';
		}
		if ( function_exists( 'w3tc_flush_all' ) && $this->allowed( 'w3tc', $t ) ) {
			w3tc_flush_all();
			$ran[] = 'w3tc';
		}
		$this->last = $ran;
		do_action( 'aooshop_host_cache_purged', $ran, $t );
		return $ran;
	}
}