<?php
/**
 * Favorites interceptor for HivePress user favorites.
 *
 * @package WP_Data_Optimizer
 */

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

/**
 * Favorites interceptor — syncs HivePress user favorites to hpct_favorites table.
 *
 * Special: operates on user_meta (hp_favorited_listings), not post_meta.
 */
class TMDO_Favorites_Interceptor extends TMDO_Interceptor_Base {

	/**
	 * Module identifier.
	 *
	 * @var string
	 */
	protected string $module = 'favorites';

	/**
	 * Registers WordPress hooks for this interceptor.
	 *
	 * @return void
	 */
	public function register_hooks(): void {
		add_filter( 'update_user_metadata', array( $this, 'filter_update_user_meta' ), 10, 5 );
		add_action( 'before_delete_post', array( $this, 'action_delete_post' ), 10, 2 );
	}

	/**
	 * Filters update_user_metadata to sync hp_favorited_listings.
	 *
	 * @param mixed  $check      Whether to short-circuit.
	 * @param int    $user_id    User ID.
	 * @param string $meta_key   Meta key.
	 * @param mixed  $meta_value Meta value.
	 * @param mixed  $prev_value Previous meta value.
	 * @return mixed Filtered check value.
	 */
	public function filter_update_user_meta( $check, int $user_id, string $meta_key, $meta_value, $prev_value ) {
		if ( 'hp_favorited_listings' !== $meta_key || ! $this->is_active() ) {
			return $check;
		}

		try {
			$this->sync_favorites( $user_id, $meta_value );
		} catch ( \Throwable $e ) {
			TMDO_Logger::error( $this->module, 'update_user_metadata', $e->getMessage() );
		}

		return $check;
	}

	/**
	 * Deletes favorites records when a listing post is deleted.
	 *
	 * @param int      $post_id Post ID.
	 * @param \WP_Post $post    Post object.
	 * @return void
	 */
	public function action_delete_post( int $post_id, \WP_Post $post ): void {
		if ( 'hp_listing' !== $post->post_type || ! $this->is_active() ) {
			return;
		}

		try {
			global $wpdb;
			$wpdb->delete( TMDO_DB::table( 'hpct_favorites' ), array( 'listing_id' => $post_id ), array( '%d' ) );
		} catch ( \Throwable $e ) {
			TMDO_Logger::error( $this->module, 'before_delete_post', $e->getMessage() );
		}
	}

	/**
	 * Syncs user favorites to the hpct_favorites table.
	 *
	 * @param int   $user_id    User ID.
	 * @param mixed $meta_value Favorites meta value (array or serialized).
	 * @return void
	 */
	private function sync_favorites( int $user_id, $meta_value ): void {
		global $wpdb;
		$table = TMDO_DB::table( 'hpct_favorites' );
		$now   = TMDO_DB::now();

		// v2.13.3: object-injection-safe unserialize (fixes L-DESER-1).
		// Input is user-controlled wp_usermeta value via update_user_meta hook.
		$listing_ids = is_array( $meta_value )
			? $meta_value
			: (array) TMDO_Safe_Unserialize::run( $meta_value );
		$listing_ids = array_filter( array_map( 'absint', $listing_ids ) );

		// Delete all existing and re-insert.
		$wpdb->delete( $table, array( 'user_id' => $user_id ), array( '%d' ) );

		$insert_sql = TMDO_IS_SQLITE ? 'INSERT OR IGNORE' : 'INSERT IGNORE';

		// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- insert_sql is 'INSERT IGNORE'/'INSERT OR IGNORE'; table name from TMDO_DB::table().
		foreach ( $listing_ids as $listing_id ) {
			$wpdb->query(
				$wpdb->prepare(
					"{$insert_sql} INTO `{$table}` (user_id, listing_id, created_at) VALUES (%d, %d, %s)",
					$user_id,
					$listing_id,
					$now
				)
			);
		}
		// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
	}
}