<?php

function sdm_search_form_shortcode($args) {
    $atts = shortcode_atts(
        array(
        'fancy' => '',
        'class' => '', // wrapper class
        'placeholder' => 'Search...', // placeholder for search input
        'description_max_length' => 50, // short description symbols count
        ), $args
    );

    global $wpdb;
    
    // Check if we have a search value posted
    $s_term = isset($_POST['sdm_search_term']) ? stripslashes(sanitize_text_field(esc_html($_POST['sdm_search_term']))) : '';
    
    if (!empty($s_term)) {
        // we got search term posted
	$keywords_searched = array();
	$posts_collection = array();
	$parts = explode(' ', $s_term);
	foreach($parts as $keyword){
	    if(strlen($keyword) < 3){
		//Ignore keywords less than 3 characters long           
		continue;
	    }
	    
	    $keywords_searched[] = $keyword;
	    
	    $querystr = "
	    SELECT $wpdb->posts.*, $wpdb->postmeta.meta_value as description
	    FROM $wpdb->posts, $wpdb->postmeta
	    WHERE $wpdb->posts.ID = $wpdb->postmeta.post_id
	    AND $wpdb->posts.post_status = 'publish' 
	    AND $wpdb->posts.post_type = 'sdm_downloads'
	    AND ($wpdb->posts.post_title LIKE '%$keyword%'
	    OR ($wpdb->postmeta.meta_key='sdm_description' AND $wpdb->postmeta.meta_value LIKE '%$keyword%') )
	    GROUP BY $wpdb->posts.ID
	    ";
	    $query_result = $wpdb->get_results($querystr, OBJECT);

	    //Merge the results of this keyword with the collection array. Also remove any duplicate.
	    $posts_collection = array_merge($posts_collection, $query_result);
	    //$posts_collection = array_unique(array_merge($posts_collection, $query_result), SORT_REGULAR);
	}
	
	//Lets get rid of any duplicates
	$unique_posts_collection_id = array();
	foreach($posts_collection as $key => $post){
	    if(in_array($post->ID, $unique_posts_collection_id)){
		//This is a duplicate.
		unset($posts_collection[$key]);//Delete this entry from the collection.
	    } else {
		//This post ID is not in the collection yet. Add it.
		$unique_posts_collection_id[] = $post->ID;
	    }
	}

	//Create the result entries output using a template.
        $s_results = sdm_generate_search_result_using_template($posts_collection, $atts);

	//Show the search result
        if (!empty($s_results)) {
            $result_output = '<h2 class="sdm_search_result_heading">'.__('Showing search results for ', 'simple-download-monitor').'"' . $s_term . '"</h2>';	    
	    $result_output .= '<div class="sdm_search_result_number_of_items">' . __('Number of items found: ', 'simple-download-monitor') . count($posts_collection) . '</div>';
	    $result_output .= '<div class="sdm_search_result_keywords">' . __('Keywords searched: ', 'simple-download-monitor') . implode(", ", $keywords_searched) . '</div>';
	    $result_output .= '<div class="sdm_search_result_listing">' . $s_results . '</div>';
        } else {
            $result_output = '<h2 class="sdm_search_result_heading">'.__('Nothing found for ', 'simple-download-monitor').'"' . $s_term . '".</h2>';
        }
    }

    $out = '';
    $out .= '<form id="sdm_search_form" class="' . (empty($atts['class']) ? '' : ' ' . $atts['class']) . '" method="POST">';
    $out .= '<input type="search" class="search-field" name="sdm_search_term" value="' . $s_term . '" placeholder="' . $atts['placeholder'] . '">';
    $out .= '<input type="submit" class="sdm_search_submit" name="sdm_search_submit" value="Search">';
    $out .= '</form>';
    $out .= isset($result_output) ? $result_output : '';

    return $out;
}

function sdm_generate_search_result_using_template($posts_collection, $args = array()) {
    $s_results = '';

    if (isset($args['fancy']) && !empty($args['fancy'])) {
        if ($args['fancy'] == '1') {
            include_once(WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy1/sdm-fancy-1.php');
            $s_results .= sdm_generate_fancy1_category_display_output($posts_collection, $args);
        } else if ($args['fancy'] == '2') {
            include_once(WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy2/sdm-fancy-2.php');
            $s_results .= sdm_generate_fancy2_category_display_output($posts_collection, $args);
        } else if ($args['fancy'] == '3') {
            include_once(WP_SIMPLE_DL_MONITOR_PATH . 'includes/templates/fancy3/sdm-fancy-3.php');
            $s_results .= sdm_generate_fancy3_category_display_output($posts_collection, $args);
        }
    } else {
        //No fancy template is used. Show the search result using the standard search display
        foreach ($posts_collection as $post) {
            $meta = get_post_meta($post->ID);
            $s_results .= '<div class="sdm_search_result_item">';
            $s_results .= '<h4><a href="' . get_permalink($post->ID) . '">' . $post->post_title . '</a></h4>';
            $descr = strip_shortcodes($meta['sdm_description'][0]);
            if (strlen($descr) > $args['description_max_length']) {
                $descr = substr($descr, 0, $args['description_max_length']) . '[...]';
            }
            $s_results .= '<span>' . $descr . '</span>';
            $s_results .= '</div>';
        }
    }

    return $s_results;
}
