<?php

/**
 * The public-facing functionality of the plugin.
 *
 * @link       http://acmemk.com
 * @since      1.0.0
 *
 * @package    Acme_Amazing_Search
 * @subpackage Acme_Amazing_Search/public
 */

/**
 *
 * @package    Acme_Amazing_Search
 * @subpackage Acme_Amazing_Search/public
 * @author     Mirko Bianco <mirko@acmemk.com>
 */
class Acme_Amazing_Search_Public {

	/**
	 * The ID of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $plugin_name    The ID of this plugin.
	 */
	private $plugin_name;

	/**
	 * The version of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $version    The current version of this plugin.
	 */
	private $version;

	/**
	 * Initialize the class and set its properties.
	 *
	 * @since    1.0.0
	 * @param      string    $plugin_name       The name of the plugin.
	 * @param      string    $version    The version of this plugin.
	 */
	public function __construct( $plugin_name, $version ) {

		$this->plugin_name = $plugin_name;
		$this->version = $version;
		$this->aas_options = get_option( $this->plugin_name );

	}

	/**
	 * Register the stylesheets for the public-facing side of the site.
	 *
	 * @since    1.0.0
	 */
	public function enqueue_styles() {

		wp_enqueue_style( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'css/acme-amazing-search-public.css', array(), $this->version, 'all' );

	}

	/**
	 * Register the JavaScript for the public-facing side of the site.
	 *
	 * @since    1.0.0
	 */
	public function enqueue_scripts() {
		/**
		 * load custom script and WP predefined jQuery and jQueryUI
		 */
		wp_enqueue_script( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'js/acme-amazing-search-public.js', array( 'jquery','jquery-ui-autocomplete' ), $this->version, true );
		/**
		 * Register 'ajax' url to be used in custom js
		 *
		 */
		wp_localize_script( $this->plugin_name, 'ajax', array('url' => admin_url( 'admin-ajax.php' )));
		wp_localize_script( $this->plugin_name, 'home', array('siteurl' => get_option('siteurl')));

	}

	/**
	 * Cleans string from crap html, blank spaces and stop-words
	 *
	 * @since    1.0.0
	 */
	private function cleanupStrings($str,$haystack=false) {
		$result = htmlentities( str_replace( array(
			"-",
			" ",
			"&nbsp;"
		), "", $str ), ENT_IGNORE );
		$result = strtolower( $result );
		$result = str_replace( array(
			"-",
			"/"
		), "", $result );
		$result = utf8_encode( str_replace( " ", "", $result ) );

		if(true==$haystack)
			$result = "__$result";
		return $result;
	}

	/**
	 * Retrieve all the posts by 'post_type' with with no child
	 *
	 * @since    1.0.0
	 */
	public function retrieve_posts($post_type, $keyword=null) {
		// WP_Query arguments
		$args = array(
			'post_parent'            => '0',
			'post_type'              => is_array( $post_type ) ? $post_type : array( $post_type ),
			'post_status'            => array( 'publish' ),
			'orderby'                => array( 'menu_order', 'post_title' ),
			'cache_results'          => true,
			'posts_per_page'         => 1,               //limit results to 1 in order to access the 'request' method
			'no_found_rows'          => true, // counts posts, remove if pagination required
			'update_post_term_cache' => false, // grabs terms, remove if terms required (category, tag...)
			'update_post_meta_cache' => false, // grabs post meta, remove if post meta required
		);
		// setup our query, replacing some option from original WP_Query
		$regex   = array(
			'/\bFROM\b/',
			'/\bOR \(wp_posts.post_content\b(.*\%)\b(.*\%(.?)\))/',    //remove search from content
			'/\bLIMIT.*/'
		);
		$replace = array( ', post_title , post_excerpt FROM', '', '' );
		// The Query
		$query = new WP_Query( $args );
		//replace
		$QStat = preg_replace( $regex, $replace, $query->request );
		//we will use $wpdb function to query the DB in order to increase preformances
		global $wpdb;
		$results = $wpdb->get_results( $QStat );

		return $results;
	}

	/**
	 * Retrieve all the posts by 'post_type' with with no child
	 *
	 * @since    1.0.0
	 */
	public function retrieve_terms($taxonomy, $keyword=null, $showTax=null) {
		// WP_Term_Query arguments
		$args = array(
			'taxonomy'   => is_array( $taxonomy ) ? $taxonomy : array( $taxonomy ),
			'order'      => 'DESC',
			'orderby'    => 'count',
			'hide_empty' => true,
			'get'        => 'all',
			'name__like' => $keyword
		);

// The Term Query
		$term_query = new WP_Term_Query( $args );

// The Loop
		if ( ! empty( $term_query ) && ! is_wp_error( $term_query ) ) {
			// do something
			foreach ( $term_query->terms as $term ) {
				$inspect[ $term->term_id ] = $term->name;
				$result[ $term->term_id ]  = array(
					'title'     => $term->name,
					'parent_id' => $term->parent,
					'id'        => $term->term_id,
					'count'     => $term->count,
					'taxonomy'  => $showTax ? $term->taxonomy : null,
					'url'       => get_term_link($term->term_id)
				);
			}

			foreach ( $result as $id => $row ) {
				if($row['parent_id']>0)
					$result[ $id ]['parent'] = $result[ $row['parent_id'] ]['title'];
			}

			return $result;
		}
	}

	/**
	 * Create the response JSON to Ajax Call
	 *
	 * @since    1.0.0
	 */
	public function do_search() {
		$term    = $this->cleanupStrings( $_REQUEST['term'] );
		$results = $this->aas_options['results'];
		$sep     = $this->aas_options['separator'] ? " {$this->aas_options['separator']} " : " - ";

		/**
		 * Let's read plugin options in order to choose the taxonomy we want to search in
		 */
		$taxonomy = array();
		if ( $this->aas_options['categories'] ) {
			$taxonomy[] = "category";
		}
		if ( $this->aas_options['tags'] ) {
			$taxonomy[] = "post_tag";
		}
		if ( $this->aas_options['brands'] ) {
			$taxonomy[] = "product_brand";
		}
		if ( $this->aas_options['product_categories'] ) {
			$taxonomy[] = "product_cat";
		}
		if ( $this->aas_options['product_tags'] ) {
			$taxonomy[] = "product_tag";
		}
		if ( $this->aas_options['terms'] ) {
			$add_terms = explode( ',', $this->aas_options['terms'] );
			$taxonomy  = array_merge( $taxonomy, $add_terms );
		}
		$i = 0;
		if ( count( $taxonomy ) > 0 ) {
			$categories = $this->retrieve_terms( $taxonomy, $term, $this->aas_options['show_taxonomy'] );
			if ( is_array( $categories ) ) {
				foreach ( $categories as $ID => $row ) {
					$haystack = $row['title'];
					if ( null != $haystack ) {
						$haystack = $this->cleanupStrings( $haystack, true );
						if ( strpos( $haystack, $term ) ) {
							$title = null;
							$title = $this->aas_options['show_taxonomy'] ? "[{$row['taxonomy']}]" . $sep : null;
							$title .= $row['parent_id'] > 0 ? "{$row['parent']} => " : null;
							$title .= "{$row['title']} ({$row['count']})";
							$caturl           = $row['url'];
							$search_results[] = array(
								'value' => $title,
								'url'   => $row['url']
							);
							$i ++;
						}
					}
					if ( $i == $results ) {
						break;
					}
				}
			}
		}
		/**
		 * Now we start counting results
		 */
		$count       = $i;
		/**
		 * $cat_results is needed for the "Search All" button behaviour
		 */
		$cat_results = $i;
		/**
		 * Let's see how many results we need before function end
		 */
		$results -= $count;


		/**
		 * Let's find out which post_types we have to query
		 */
		$post_type = array();
		if ( $this->aas_options['posts'] ) {
			$post_type[] = "post";
		}
		if ( $this->aas_options['pages'] ) {
			$post_type[] = "page";
		}
		if ( $this->aas_options['products'] ) {
			$post_type[] = "product";
		}
		if ( $this->aas_options['post_type'] ) {
			$p_types   = explode( ',', $this->aas_options['post_type'] );
			$post_type = array_merge( $post_type, $p_types );
		}
		if ( count( $post_type ) > 0 ) {
			$posts = $this->retrieve_posts( $post_type, $term );
		};
		if ( $results > 0 && is_array( $posts ) ) {
			/**
			 * Let's see where we have to look for our terms (title, excerpt or both?)
			 */
			$title   = $this->aas_options['title'];
			$excerpt = $this->aas_options['excerpt'];
			$i = 0;
			foreach ( $posts as $row ) {
				$haystack = $title ? $row->post_title : null;
				$haystack .= $excerpt ? wp_strip_all_tags( $row->post_excerpt ) : $haystack;
				if ( null != $haystack ) {
					$haystack = $this->cleanupStrings( $haystack, true );
					if ( strpos( $haystack, $term ) ) {
						$title = $this->aas_options['show_title'] ? $row->post_title : null;
						if ( $title && $this->aas_options['show_excerpt'] ) {
							$title .= $sep;
						}
						$title .= $this->aas_options['show_excerpt'] ? wp_strip_all_tags( $row->post_excerpt ) : null;
						$title            = $this->aas_options['trim'] ? substr( $title, 0, $this->aas_options['trim'] ) . "..." : $title;
						$search_results[] = array(
							'value' => $title,
							'url'   => get_permalink( $row->ID ),
						);
						$i ++;
					}
				}
				if ( $i == $results ) {
					break;
				}
			}
		}
		/**
		 * Show All button behaviour
		 */
		$show_all_text = $this->aas['show_all_text'] ? $this->aas_options['show_all_text'] : __( "Show All", $this->plugin_name );
		switch ( $this->aas_options['behaviour'] ) {
			case 1:
				if ( $cat_results == 1 ) {
					$search_results[] = array(
						'value' => $show_all_text,
						'url'   => $caturl,
					);
				} else {
					$search_results[] = array(
						'value' => $show_all_text,
						'url'   => get_bloginfo( 'url' ) . '/?s=' . $_REQUEST['term']
					);
				}
				break;
			default:
				$search_results[] = array(
					'value' => $show_all_text,
					'url'   => get_bloginfo( 'url' ) . '/?s=' . $_REQUEST['term'],
				);

				break;
		}

		ob_clean();
		//print_r($search_results);
		echo json_encode( $search_results );
		wp_die();
	}


}