<?php
/**
 * Statistics interceptor for listing view tracking.
 *
 * @package WP_Data_Optimizer
 */

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

/**
 * Statistics interceptor — tracks listing view events in hpct_statistics.
 *
 * Special: append-only (INSERT only, no UPDATE). Records events from
 * both _hp_views meta update and HivePress listing/viewed action.
 */
class TMDO_Statistics_Interceptor extends TMDO_Interceptor_Base {

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

	/**
	 * Registers WordPress hooks for this interceptor.
	 *
	 * @return void
	 */
	public function register_hooks(): void {
		add_filter( 'update_post_metadata', array( $this, 'filter_view_meta' ), 10, 5 );
		add_action( 'hivepress/v1/models/listing/viewed', array( $this, 'action_listing_viewed' ), 10, 1 );
		add_action( 'before_delete_post', array( $this, 'action_delete_post' ), 10, 2 );
	}

	/**
	 * Filters update_post_metadata to record a view event when _hp_views is updated.
	 *
	 * @param mixed  $check      Whether to short-circuit.
	 * @param int    $post_id    Post 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_view_meta( $check, int $post_id, string $meta_key, $meta_value, $prev_value ) {
		if ( '_hp_views' !== $meta_key || 'hp_listing' !== get_post_type( $post_id ) ) {
			return $check;
		}

		if ( ! $this->is_active() ) {
			return $check;
		}

		try {
			$this->record_event( $post_id, 'view' );
		} catch ( \Throwable $e ) {
			TMDO_Logger::error( $this->module, 'update_post_metadata', $e->getMessage() );
		}

		return $check;
	}

	/**
	 * Records a view event when a HivePress listing is viewed.
	 *
	 * @param mixed $listing Listing object or ID.
	 * @return void
	 */
	public function action_listing_viewed( $listing ): void {
		if ( ! $this->is_active() ) {
			return;
		}

		$listing_id = is_object( $listing ) && method_exists( $listing, 'get_id' )
			? $listing->get_id()
			: ( is_numeric( $listing ) ? (int) $listing : 0 );

		if ( ! $listing_id ) {
			return;
		}

		try {
			$this->record_event( $listing_id, 'hp_action_view' );
		} catch ( \Throwable $e ) {
			TMDO_Logger::error( $this->module, 'listing_viewed', $e->getMessage() );
		}
	}

	/**
	 * Deletes statistics 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_statistics' ), array( 'listing_id' => $post_id ), array( '%d' ) );
		} catch ( \Throwable $e ) {
			TMDO_Logger::error( $this->module, 'before_delete_post', $e->getMessage() );
		}
	}

	/**
	 * Records a statistics event to the hpct_statistics table.
	 *
	 * @param int    $listing_id Listing post ID.
	 * @param string $event_type Event type identifier.
	 * @return void
	 */
	private function record_event( int $listing_id, string $event_type ): void {
		global $wpdb;

		$user_id = get_current_user_id();
		$ip      = sanitize_text_field( wp_unslash( $_SERVER['REMOTE_ADDR'] ?? '' ) );
		$ip_hash = $ip ? hash( 'sha256', $ip ) : '';

		$wpdb->insert(
			TMDO_DB::table( 'hpct_statistics' ),
			array(
				'listing_id' => $listing_id,
				'event_type' => $event_type,
				'user_id'    => $user_id,
				'ip_hash'    => $ip_hash,
				'referrer'   => substr( esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ?? '' ) ), 0, 500 ),
				'created_at' => TMDO_DB::now(),
			),
			array( '%d', '%s', '%d', '%s', '%s', '%s' )
		);
	}
}