<?php

namespace WPDRMS\ASP\Search;

use WPDRMS\ASP\Misc\Priorities;
use WPDRMS\ASP\Utils\Str;

final class SearchMedia extends SearchMediaIndex {
	protected function doSearch(): void {
		global $wpdb;
		global $q_config;

		$args = $this->args;
		$sd   = $args['_sd'] ?? array();

		// Prefixes and suffixes
		$pre_field = $this->pre_field;
		$suf_field = $this->suf_field;
		$pre_like  = $this->pre_like;
		$suf_like  = $this->suf_like;

		$wcl = '%'; // Wildcard Left
		$wcr = '%'; // Wildcard right
		if ( $args['_exact_matches'] ) {
			if ( $args['_exact_match_location'] === 'start' ) {
				$wcl = '';
			} elseif ( $args['_exact_match_location'] === 'end' ) {
				$wcr = '';
			} elseif ( $args['_exact_match_location'] === 'full' ) {
				$wcr = '';
				$wcl = '';
			}
		}

		$kw_logic             = $args['keyword_logic'];
		$q_config['language'] = $args['_qtranslate_lang'];

		$s  = $this->s; // full keyword
		$_s = $this->_s; // array of keywords

		$postmeta_join = '';

		if ( $args['_limit'] > 0 ) {
			$this->remaining_limit = $args['_limit'];
		} elseif ( $args['_ajax_search'] ) {
			$this->remaining_limit = $args['attachments_limit'];
		} else {
			$this->remaining_limit = $args['attachments_limit_override'];
		}
		$query_limit = $this->remaining_limit * $this->remaining_limit_mod;

		if ( $this->remaining_limit <= 0 ) {
			return;
		}

		// ------------------------- Statuses ---------------------------- //
		// Attachments are inherited only
		$post_statuses = '(' . $pre_field . $wpdb->posts . '.post_status' . $suf_field . " = 'inherit' )";
		/*---------------------------------------------------------------*/

		// ----------------------- Gather Types -------------------------- //
		$post_types = "($wpdb->posts.post_type = 'attachment' )";
		// --------------------------------------------------------------- //

		// ------------------------ Categories/tags/taxonomies ----------------------
		$term_query = $this->buildTermQuery( $wpdb->posts . '.ID', $wpdb->posts . '.post_type' );
		// ---------------------------------------------------------------------

		// ------------- Custom Fields with Custom selectors ------------- //
		if ( $args['attachments_cf_filters'] ) {
			$cf_select = $this->buildCffQuery( $wpdb->posts . '.ID' );
		} else {
			$cf_select = '(1)';
		}
		// --------------------------------------------------------------- //

		// ------------------------- Mime Types -------------------------- //
		$mime_types = '';
		if ( !empty($args['attachment_mime_types']) ) {
			$mime_types = "AND ( $wpdb->posts.post_mime_type IN ('" . implode("','", $args['attachment_mime_types']) . "') )";
		}
		// --------------------------------------------------------------- //

		// ------------------------ Exclude id's ------------------------- //
		$exclude_posts = '';
		if ( !empty($args['attachment_exclude']) ) {
			$exclude_posts = "AND ($wpdb->posts.ID NOT IN (" . implode(',', $args['attachment_exclude']) . '))';
		}
		// --------------------------------------------------------------- //

		// ------------------------ Term JOIN ---------------------------- //
		// If the search in terms is not active, we don't need this unnecessary big join
		$term_join = '';
		if ( $args['attachments_search_terms'] ) {
			$term_join = "
			LEFT JOIN $wpdb->term_relationships ON $wpdb->posts.ID = $wpdb->term_relationships.object_id
			LEFT JOIN $wpdb->term_taxonomy ON $wpdb->term_taxonomy.term_taxonomy_id = $wpdb->term_relationships.term_taxonomy_id
			LEFT JOIN $wpdb->terms ON $wpdb->term_taxonomy.term_id = $wpdb->terms.term_id";
		}
		// --------------------------------------------------------------- //

		// ------------------------- WPML filter ------------------------- //
		$wpml_query = '(1)';
		if ( $args['_wpml_lang'] !== '' ) {
			global $sitepress;
			$site_lang_selected = false;

			// Let us get the default site language if possible
			if ( is_object($sitepress) && method_exists($sitepress, 'get_default_language') ) {
				$site_lang_selected = $sitepress->get_default_language() === $args['_wpml_lang'];
			}

			$wpml_query = '
			EXISTS (
				SELECT DISTINCT(wpml.element_id)
				FROM ' . $wpdb->prefix . "icl_translations as wpml
				WHERE
					$wpdb->posts.ID = wpml.element_id AND
					wpml.language_code = '" . Str::escape( $args['_wpml_lang'] ) . "' AND
					wpml.element_type IN ('post_attachment')
			)";

			/**
			 * For missing translations...
			 * If the site language is used, the translation can be non-existent
			 */
			if (
				$args->wpml_display_missing_translations === 'on_all_languages' ||
				( $args->wpml_display_missing_translations === 'on_main_language' && $site_lang_selected )
			) {
				$wpml_query = '
				NOT EXISTS (
					SELECT DISTINCT(wpml.element_id)
					FROM ' . $wpdb->prefix . "icl_translations as wpml
					WHERE
						$wpdb->posts.ID = wpml.element_id AND
						wpml.element_type IN ('post_attachment')
				) OR
				" . $wpml_query;
			}
		}
		/*---------------------------------------------------------------*/

		/*----------------------- Date filtering ------------------------*/
		$date_query       = '';
		$date_query_parts = $this->get_date_query_parts();
		if ( count($date_query_parts) > 0 ) {
			$date_query = ' AND (' . implode(' AND ', $date_query_parts) . ') ';
		}
		/*---------------------------------------------------------------*/

		/*----------------------- Exclude USER id -----------------------*/
		$user_query = '';
		if ( isset($args['post_user_filter']['include']) ) {
			if ( !in_array(-1, $args['post_user_filter']['include']) ) { // phpcs:ignore
				$user_query = "AND $wpdb->posts.post_author IN (" . implode(', ', $args['post_user_filter']['include']) . ')
				';
			}
		}
		if ( isset($args['post_user_filter']['exclude']) ) {
			if ( !in_array(-1, $args['post_user_filter']['exclude']) ) { // phpcs:ignore
				$user_query = "AND $wpdb->posts.post_author NOT IN (" . implode(', ', $args['post_user_filter']['exclude']) . ') ';
			} else {
				return;
			}
		}
		/*---------------------------------------------------------------*/

		/**
		 * Determine if the priorities table should be used or not.
		 */
		$priority_select = Priorities::count() > 0 ? '
		IFNULL((
			SELECT
			aspp.priority
			FROM ' . wd_asp()->db->table('priorities') . " as aspp
			WHERE aspp.post_id = $wpdb->posts.ID AND aspp.blog_id = " . get_current_blog_id() . '
		), 100)
		' : 100;

		/*---------------- Primary custom field ordering ----------------*/
		$custom_field_selectp = '1 ';
		if (
			strpos($args['post_primary_order'], 'customfp') !== false &&
			$args['_post_primary_order_metakey'] !== ''
		) {
			// @phpstan-ignore-next-line
			$custom_field_selectp = "(SELECT IF(meta_value IS NULL, 0, meta_value)
			FROM $wpdb->postmeta
			WHERE
				$wpdb->postmeta.meta_key='" . esc_sql($args['_post_primary_order_metakey']) . "' AND
				$wpdb->postmeta.post_id=$wpdb->posts.ID
			LIMIT 1
			) ";
		}
		/*---------------------------------------------------------------*/

		/*--------------- Secondary custom field ordering ---------------*/
		$custom_field_selects = '1 ';
		if (
			strpos($args['post_secondary_order'], 'customfs') !== false &&
			$args['_post_secondary_order_metakey'] !== ''
		) {
			// @phpstan-ignore-next-line
			$custom_field_selects = "(SELECT IF(meta_value IS NULL, 0, meta_value)
			FROM $wpdb->postmeta
			WHERE
				$wpdb->postmeta.meta_key='" . esc_sql($args['_post_secondary_order_metakey']) . "' AND
				$wpdb->postmeta.post_id=$wpdb->posts.ID
			LIMIT 1
			) ";
		}
		/*---------------------------------------------------------------*/

		$this->ordering['primary']   = $args['post_primary_order'];
		$this->ordering['secondary'] = $args['post_secondary_order'];

		$_primary_field                  = explode(' ', $this->ordering['primary']);
		$this->ordering['primary_field'] = $_primary_field[0];

		$orderby_primary   = str_replace( 'post_', $wpdb->posts . '.post_', $args['post_primary_order'] );
		$orderby_secondary = str_replace( 'post_', $wpdb->posts . '.post_', $args['post_secondary_order'] );

		if ( $args['post_primary_order_metatype'] === 'numeric' ) {
			$orderby_primary = str_replace('customfp', 'CAST(customfp as SIGNED)', $orderby_primary);
		}

		if ( $args['post_secondary_order_metatype'] === 'numeric' ) {
			$orderby_secondary = str_replace('customfs', 'CAST(customfs as SIGNED)', $orderby_secondary);
		}

		/**
		 * This is the main query.
		 *
		 * The ttid field is a bit tricky as the term_taxonomy_id doesn't always equal term_id,
		 * so we need the LEFT JOINS :(
		 */
		$this->query = "
		SELECT
			{args_fields}
			$wpdb->posts.ID as id,
			$this->c_blogid as `blogid`,
			$wpdb->posts.post_title as `title`,
			$wpdb->posts.post_date as `date`,
			$wpdb->posts.post_content as `content`,
			$wpdb->posts.post_excerpt as `excerpt`,
			$wpdb->posts.post_type as `post_type`,
			$wpdb->posts.post_mime_type as post_mime_type,
			$wpdb->posts.guid as guid,
			'attachment' as `content_type`,
			'attachments' as `g_content_type`,
			(SELECT
				$wpdb->users." . w_isset_def($sd['author_field'], 'display_name') . " as `author`
				FROM $wpdb->users
				WHERE $wpdb->users.ID = $wpdb->posts.post_author
			) as `author`,
			'' as ttid,
			$wpdb->posts.post_type as `post_type`,
			$priority_select as `priority`,
			1 AS group_priority,
			1 as `p_type_priority`,
			{relevance_query} as `relevance`,
			$custom_field_selectp as `customfp`,
			$custom_field_selects as `customfs`
		FROM $wpdb->posts
			{postmeta_join}
			$term_join
			{args_join}
		WHERE
				$post_types
			AND $post_statuses
			AND {like_query}
			$exclude_posts
			$mime_types
			$term_query
			$date_query
			$user_query
			AND $cf_select
			AND ($wpml_query)
			{args_where}
		GROUP BY
			{args_groupby} 
		ORDER BY {args_orderby} priority DESC, $orderby_primary, $orderby_secondary
		LIMIT $query_limit";

		// Place the argument query fields
		if ( isset($args['attachment_query']) && is_array($args['attachment_query']) ) {
			$this->query = str_replace(
				array( '{args_fields}', '{args_join}', '{args_where}', '{args_orderby}' ),
				array( $args['attachment_query']['fields'], $args['attachment_query']['join'], $args['attachment_query']['where'], $args['attachment_query']['orderby'] ),
				$this->query
			);
		} else {
			$this->query = str_replace(
				array( '{args_fields}', '{args_join}', '{args_where}', '{args_orderby}' ),
				'',
				$this->query
			);
		}
		if ( isset($args['attachment_query']['groupby']) && $args['attachment_query']['groupby'] !== '' ) {
			$this->query = str_replace('{args_groupby}', $args['attachment_query']['groupby'], $this->query);
		} else {
			$this->query = str_replace('{args_groupby}', "$wpdb->posts.ID", $this->query);
		}

		$words = $args['_exact_matches'] && $s !== '' ? array( $s ) : $_s;
		/**
		 * Ex.: When the minimum word count is 2, and the user enters 'a' then $_s is empty.
		 *      But $s is not actually empty, thus the wrong query will be executed.
		 */
		if ( count($words) === 0 && $s !== '' ) {
			$words = array( $s );
			// Allow only beginnings
			if ( !$args['_exact_matches'] ) {
				$wcl = '';
			}
		}
		if ( $s !== '' ) {
			$words = !in_array($s, $words, true) ? array_merge(array( $s ), $words) : $words;
		}

		$relevance_added = false;
		foreach ( $words as $k => $word ) {
			$parts           = array();
			$relevance_parts = array();
			$is_exact        = $args['_exact_matches'] || ( count($words) > 1 && $k === 0 && ( $kw_logic === 'or' || $kw_logic === 'and' ) );

			/*----------------------- Title query ---------------------------*/
			if ( $args['attachments_search_title'] ) {
				if ( $kw_logic === 'or' || $kw_logic === 'and' || $is_exact ) {
					$parts[] = '( ' . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE $pre_like'$wcl" . $word . "$wcr'$suf_like )";
				} else {
					$parts[] = '
					   ( ' . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE $pre_like'% " . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE $pre_like'" . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE $pre_like'% " . $word . "'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " = '" . $word . "')";
				}
				if ( !$relevance_added ) {
					$relevance_parts[] = '(case when
					(' . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE '$s%')
					 then " . ( w_isset_def($sd['etitleweight'], 10) * 2 ) . ' else 0 end)';

					$relevance_parts[] = '(case when
					(' . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE '%$s%')
					 then " . w_isset_def($sd['etitleweight'], 10) . ' else 0 end)';

					// The first word relevance is higher
					if ( isset($_s[0]) ) {
						$relevance_parts[] = '(case when
					  (' . $pre_field . $wpdb->posts . '.post_title' . $suf_field . " LIKE '%" . $_s[0] . "%')
					   then " . w_isset_def($sd['etitleweight'], 10) . ' else 0 end)';
					}
				}
			}
			/*---------------------------------------------------------------*/

			/*---------------------- Content query --------------------------*/
			if ( $args['attachments_search_content'] ) {
				if ( $kw_logic === 'or' || $kw_logic === 'and' || $is_exact ) {
					$parts[] = '( ' . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE $pre_like'$wcl" . $word . "$wcr'$suf_like )";
				} else {
					$parts[] = '
					   (' . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE $pre_like'% " . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE $pre_like'" . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE $pre_like'% " . $word . "'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " = '" . $word . "')";

				}
				if ( !$relevance_added ) {
					if ( isset($_s[0]) ) {
						$relevance_parts[] = '(case when
						(' . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE '%" . $_s[0] . "%')
						 then " . w_isset_def($sd['contentweight'], 10) . ' else 0 end)';
					}
					$relevance_parts[] = '(case when
					(' . $pre_field . $wpdb->posts . '.post_content' . $suf_field . " LIKE '%$s%')
					 then " . w_isset_def($sd['econtentweight'], 10) . ' else 0 end)';
				}
			}
			/*---------------------------------------------------------------*/

			/*------------------- Caption/Excerpt query ---------------------*/
			if ( $args['attachments_search_caption'] ) {
				if ( $kw_logic === 'or' || $kw_logic === 'and' || $is_exact ) {
					$parts[] = '( ' . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " LIKE $pre_like'$wcl" . $word . "$wcr'$suf_like )";
				} else {
					$parts[] = '
					   (' . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " LIKE $pre_like'% " . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " LIKE $pre_like'" . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " LIKE $pre_like'% " . $word . "'$suf_like
					OR  " . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " = '" . $word . "')";
				}
				if ( !$relevance_added ) {
					if ( isset($_s[0]) ) {
						$relevance_parts[] = '(case when
						(' . $pre_field . $wpdb->posts . '.post_excerpt' . $suf_field . " LIKE '%" . $_s[0] . "%')
						 then " . w_isset_def($sd['contentweight'], 10) . ' else 0 end)';
					}
				}
			}
			/*---------------------------------------------------------------*/

			/*-------------------------- IDs query --------------------------*/
			if ( $args['attachments_search_ids'] ) {
				$parts[] = "($wpdb->posts.ID LIKE '$word')";
			}
			/*---------------------------------------------------------------*/

			/*------------------------ Term query ---------------------------*/
			if ( $args['attachments_search_terms'] ) {
				if ( $kw_logic === 'or' || $kw_logic === 'and' || $is_exact ) {
					$parts[] = '( ' . $pre_field . $wpdb->terms . '.name' . $suf_field . " LIKE $pre_like'$wcl" . $word . "$wcr'$suf_like )";
				} else {
					$parts[] = '
					   (' . $pre_field . $wpdb->terms . '.name' . $suf_field . " LIKE $pre_like'% " . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->terms . '.name' . $suf_field . " LIKE $pre_like'" . $word . " %'$suf_like
					OR  " . $pre_field . $wpdb->terms . '.name' . $suf_field . " LIKE $pre_like'% " . $word . "'$suf_like
					OR  " . $pre_field . $wpdb->terms . '.name' . $suf_field . " = '" . $word . "')";
				}
			}
			/*---------------------------------------------------------------*/

			/*---------------------- Custom Fields --------------------------*/
			if ( $args['post_custom_fields_all'] ) {
				$args['post_custom_fields'] = array( 'all' );
			}

			if ( count($args['post_custom_fields']) > 0 ) {
				$postmeta_join = "LEFT JOIN $wpdb->postmeta ON $wpdb->postmeta.post_id = $wpdb->posts.ID";

				foreach ( $args['post_custom_fields'] as $cfield ) {
					$key_part = $args['post_custom_fields_all'] ? '' : "$wpdb->postmeta.meta_key='$cfield' AND ";

					if ( $kw_logic === 'or' || $kw_logic === 'and' ) {
						$parts[] = "( $key_part " . $pre_field . $wpdb->postmeta . '.meta_value' . $suf_field . " LIKE $pre_like'$wcl" . $word . "$wcr'$suf_like )";
					} else {
						$parts[] = "( $key_part
						   (" . $pre_field . $wpdb->postmeta . '.meta_value' . $suf_field . " LIKE $pre_like'% " . $word . " %'$suf_like
						OR  " . $pre_field . $wpdb->postmeta . '.meta_value' . $suf_field . " LIKE $pre_like'" . $word . " %'$suf_like
						OR  " . $pre_field . $wpdb->postmeta . '.meta_value' . $suf_field . " LIKE $pre_like'% " . $word . "'$suf_like
						OR  " . $pre_field . $wpdb->postmeta . '.meta_value' . $suf_field . " = '" . $word . "') )";
					}
					if ( !$relevance_added ) {
						if ( $cfield === 'author_field_name' ) {
							$relevance_parts[] = "(case when
						(EXISTS (SELECT 1 FROM $wpdb->postmeta as cfre WHERE cfre.post_id = $wpdb->posts.ID AND cfre.meta_key = '$cfield' AND 
						(cfre.meta_value" . $suf_field . " LIKE '%" . $s . "%')))
						 then 100 else 0 end)";
						}
						if ( $cfield === 'fulltext_field_name' ) {
							$relevance_parts[] = "(case when
						(EXISTS (SELECT 1 FROM $wpdb->postmeta as cfre WHERE cfre.post_id = $wpdb->posts.ID AND cfre.meta_key = '$cfield' AND 
						(cfre.meta_value" . $suf_field . " LIKE '%" . $s . "%')))
						 then 10 else 0 end)";
						}
					}
				}
			}
			/*---------------------------------------------------------------*/

			$this->parts[]   = array( $parts, $relevance_parts );
			$relevance_added = true;
		}

		// Add the meta join if needed...
		$this->query = str_replace( '{postmeta_join}', $postmeta_join, $this->query );

		$querystr            = $this->buildQuery($this->parts);
		$querystr            = apply_filters('asp_query_attachments', $querystr, $args, $args['_id'], $args['_ajax_search']);
		$attachments         = $wpdb->get_results($querystr); // @phpcs:ignore
		$this->results_count = count($attachments);

		// For non-ajax search, results count needs to be limited to the maximum limit, as nothing is parsed beyond that
		if ( !$args['_ajax_search'] && $this->results_count > $this->remaining_limit ) {
			$this->results_count = $this->remaining_limit;
		}

		$attachments = array_slice($attachments, $args['_call_num'] * $this->remaining_limit, $this->remaining_limit);

		$this->results      = $attachments;
		$this->return_count = count($this->results);
	}
}
