<?php
/**
 * Jet_Search_Ajax_Handlers class
 *
 * @package   jet-search
 * @author    Zemez
 * @license   GPL-2.0+
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

if ( ! class_exists( 'Jet_Search_Ajax_Handlers' ) ) {

	/**
	 * Define Jet_Search_Ajax_Handlers class
	 */
	class Jet_Search_Ajax_Handlers {

		/**
		 * A reference to an instance of this class.
		 *
		 * @since 1.0.0
		 * @var   Jet_Search_Ajax_Handlers
		 */
		private static $instance = null;

		/**
		 * Ajax action.
		 *
		 * @var string
		 */
		private $action = 'jet_ajax_search';

		/**
		 * Has navigation.
		 *
		 * @var bool
		 */
		public $has_navigation = false;

		/**
		 * Search query.
		 *
		 * @var array
		 */
		public $search_query = array();

		/**
		 * Table alias.
		 *
		 * @var string
		 */
		private $postmeta_table_alias = 'jetsearch';

		/**
		 * Is the search result page.
		 *
		 * @var bool
		 */
		private $is_search = false;

		/**
		 * Constructor for the class
		 */
		public function init() {
			// Set search query settings on the search result page
			add_action( 'pre_get_posts', array( $this, 'set_search_query' ) );

			// Search in custom fields
			add_filter( 'posts_join',  array( $this, 'cf_search_join' ) );
			add_filter( 'posts_where', array( $this, 'cf_search_where' ) );

			if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
				add_action( "wp_ajax_{$this->action}",        array( $this, 'get_search_results' ) );
				add_action( "wp_ajax_nopriv_{$this->action}", array( $this, 'get_search_results' ) );

				add_action( 'wp_ajax_jet_search_get_query_control_options', array( $this, 'get_query_control_options' ) );
			}

			// Init session on search result page
			if ( is_search() && ! session_id() ) {
				session_start();
			}
		}

		/**
		 * Get ajax action.
		 *
		 * @since  1.1.2
		 * @return string
		 */
		public function get_ajax_action() {
			return $this->action;
		}

		/**
		 * Set search query settings on the search result page.
		 *
		 * @param object $query
		 */
		public function set_search_query( $query ) {
			if ( $query->is_search ) {

				$this->reset_session_data();

				$this->is_search = true;
				$form_settings   = $this->get_form_settings();

				if ( ! empty( $form_settings ) ) {
					$this->set_query_settings( $form_settings );

					if ( isset( $query->query_vars['jet_smart_filters'] ) ) {
						$query->query_vars = array_merge( $this->search_query, $query->query_vars );
					} else {
						$query->query_vars = array_merge( $query->query_vars, $this->search_query );
					}
				}
			}
		}

		/**
		 * Get form settings on the search result page.
		 *
		 * @return array
		 */
		public function get_form_settings() {
			$form_settings = array();

			if ( ! empty( $_GET['jet_ajax_search_settings'] ) ) {
				$form_settings = stripcslashes( $_GET['jet_ajax_search_settings'] );;
				$_SESSION['jet_ajax_search_settings'] = $form_settings;

			} elseif ( ! empty( $_SESSION['jet_ajax_search_settings'] ) ) {
				$form_settings = $_SESSION['jet_ajax_search_settings'];
			}

			if ( ! empty( $form_settings ) ) {
				$form_settings = json_decode( $form_settings );
				$form_settings = get_object_vars( $form_settings );
			}

			return $form_settings;
		}

		/**
		 * Reset session data.
		 */
		public function reset_session_data() {

			if ( wp_doing_ajax() || ! isset( $_SESSION['jet_ajax_search_settings'] ) ) {
				return;
			}

			unset( $_SESSION['jet_ajax_search_settings'] );
		}

		/**
		 * Get search results.
		 */
		public function get_search_results() {

			//if ( ! isset( $_GET['nonce'] ) || ! wp_verify_nonce( $_GET['nonce'], $this->action ) ) {
			//	wp_send_json_error( array(
			//		'message' => 'Invalid Nonce!'
			//	) );
			//	return;
			//}

			$data = $this->get_search_data();

			if ( empty( $data ) ) {
				wp_send_json_error( array(
					'message' => 'Empty Search Data'
				) );
				return;
			}

			wp_send_json_success( $data );
		}

		/**
		 * Get search data.
		 *
		 * @return array|bool
		 */
		public function get_search_data() {
			if ( empty( $_GET['data'] ) ) {
				return false;
			}

			$data                                      = $_GET['data'];
			$this->search_query['s']                   = urldecode( $data['value'] );
			$this->search_query['nopaging']            = false;
			$this->search_query['ignore_sticky_posts'] = false;
			$this->search_query['posts_per_page']      = ( int ) $data['limit_query_in_result_area'];
			$this->search_query['post_status']         = 'publish';

			$this->set_query_settings( $data );

			add_filter( 'wp_query_search_exclusion_prefix', '__return_empty_string' );

			$search   = new WP_Query( $this->search_query );
			$response = array(
				'error'      => false,
				'post_count' => 0,
				'message'    => '',
				'posts'      => null,
			);

			remove_filter( 'wp_query_search_exclusion_prefix', '__return_empty_string' );

			if ( is_wp_error( $search ) ) {
				$response['error']   = true;
				$response['message'] = esc_html( $data['server_error'] );

				return $response;
			}

			if ( empty( $search->post_count ) ) {
				$response['message'] = esc_html( $data['negative_search'] );

				return $response;
			}

			$data['limit_query'] = $this->extract_limit_query( $data );

			$data['post_count'] = $search->post_count;
			$data['columns']    = ceil( $data['post_count'] / $data['limit_query'] );

			$response['posts']              = array();
			$response['columns']            = $data['columns'];
			$response['limit_query']        = $data['limit_query'];
			$response['post_count']         = $data['post_count'];
			$response['results_navigation'] = $this->get_results_navigation( $data );

			foreach ( $search->posts as $key => $post ) {

				$response['posts'][ $key ] = array(
					'title'          => $post->post_title,
					'before_title'   => Jet_Search_Template_Functions::get_meta_fields( $data, $post, 'title_related', 'jet-search-title-fields', array( 'before' ) ),
					'after_title'    => Jet_Search_Template_Functions::get_meta_fields( $data, $post, 'title_related', 'jet-search-title-fields', array( 'after' ) ),
					'content'        => Jet_Search_Template_Functions::get_post_content( $data, $post ),
					'before_content' => Jet_Search_Template_Functions::get_meta_fields( $data, $post, 'content_related', 'jet-search-content-fields', array( 'before' ) ),
					'after_content'  => Jet_Search_Template_Functions::get_meta_fields( $data, $post, 'content_related', 'jet-search-content-fields', array( 'after' ) ),
					'thumbnail'      => Jet_Search_Template_Functions::get_post_thumbnail( $data, $post ),
					'link'           => esc_url( get_permalink( $post->ID ) ),
					'price'          => Jet_Search_Template_Functions::get_product_price( $data, $post ),
					'rating'         => Jet_Search_Template_Functions::get_product_rating( $data, $post ),
				);

				$custom_post_data = apply_filters( 'jet-search/ajax-search/custom-post-data', array(), $data, $post );

				if ( ! empty( $custom_post_data ) ) {
					$response['posts'][ $key ] = array_merge( $response['posts'][ $key ], $custom_post_data );
				}

				if ( ! $this->has_navigation && $key === $data['limit_query'] - 1 ) {
					break;
				}
			}

			return $response;
		}

		/**
		 * Set search query settings.
		 *
		 * @param array $args
		 */
		protected function set_query_settings( $args = array() ) {
			if ( $args ) {
				$this->search_query['cache_results'] = true;
				$this->search_query['post_type']     = $args['search_source'];
				$this->search_query['order']         = $args['results_order'];
				$this->search_query['orderby']       = $args['results_order_by'];
				$this->search_query['tax_query']     = array( 'relation' => 'AND' );
				$this->search_query['sentence']      = isset( $args['sentence'] ) ? filter_var( $args['sentence'], FILTER_VALIDATE_BOOLEAN ) : false;
				$this->search_query['post_status']   = 'publish';

				// Include specific terms
				if ( ! empty( $args['category__in'] ) ) {
					$tax = ! empty( $args['search_taxonomy'] ) ? $args['search_taxonomy'] : 'category';

					array_push(
						$this->search_query['tax_query'],
						array(
							'taxonomy' => $tax,
							'field'    => 'id',
							'operator' => 'IN',
							'terms'    => $args['category__in'],
						)
					);
				} else if ( ! empty( $args['include_terms_ids'] ) ) {

					$include_tax_query = array( 'relation' => 'OR' );
					$terms_data        = $this->prepare_terms_data( $args['include_terms_ids'] );

					foreach ( $terms_data as $taxonomy => $terms_ids ) {
						$include_tax_query[] = array(
							'taxonomy' => $taxonomy,
							'field'    => 'id',
							'operator' => 'IN',
							'terms'    => $terms_ids,
						);
					}

					array_push(
						$this->search_query['tax_query'],
						$include_tax_query
					);
				}

				// Exclude specific terms
				if ( ! empty( $args['exclude_terms_ids'] ) ) {

					$exclude_tax_query = array( 'relation' => 'OR' );
					$terms_data        = $this->prepare_terms_data( $args['exclude_terms_ids'] );

					foreach ( $terms_data as $taxonomy => $terms_ids ) {
						$exclude_tax_query[] = array(
							'taxonomy' => $taxonomy,
							'field'    => 'id',
							'operator' => 'NOT IN',
							'terms'    => $terms_ids,
						);
					}

					array_push(
						$this->search_query['tax_query'],
						$exclude_tax_query
					);
				}

				// Exclude specific posts
				if ( ! empty( $args['exclude_posts_ids'] ) ) {
					$this->search_query['post__not_in'] = $args['exclude_posts_ids'];
				}

				// Current Query
				if ( ! empty( $args['current_query'] ) ) {
					$this->search_query = array_merge( $this->search_query, (array) $args['current_query'] );
				}