<?php
$listings_post_type  = ! empty( get_query_var( 'post_type' ) ) ? get_query_var( 'post_type' ) : apply_filters( 'stm_listings_post_type', 'listings' );
$listings_archive    = apply_filters( 'stm_inventory_page_url', '', $listings_post_type );
$back_inventory_link = $listings_archive;

$blog_id = get_current_blog_id();
if ( isset( $_COOKIE[ 'stm_visitor_' . $blog_id ] ) ) {
	$fake_id = $_COOKIE[ 'stm_visitor_' . $blog_id ];
}

// check if we have a previously visited page
if ( ! empty( wp_get_referer() ) && ! empty( $fake_id ) ) {
	// is there a query cookie (coming from modern inventory)?
	$modern_inventory_query = get_transient( 'stm_search_results_query_' . $fake_id );

	// previous page was CLASSIC INVENTORY, SOLD INVENTORY...
	$prev_inventory = ( stm_get_listing_archive_page_id() == url_to_postid( wp_get_referer() ) || wp_get_referer() == $listings_archive );//phpcs:ignore

	//...or LISTING SINGLE page
	$prev_single = $listings_post_type == get_post_type( url_to_postid( wp_get_referer() ) );//phpcs:ignore

	$query_post_type = ( 'listings' !== $listings_post_type ) ? $listings_post_type . '_' : '';

	if ( empty( $modern_inventory_query ) && ( $prev_inventory || $prev_single ) ) {
		$last_query_args = get_transient( 'stm_last_query_args_' . $query_post_type . $fake_id );
		$last_query_link = get_transient( 'stm_last_query_link_' . $query_post_type . $fake_id );
		if ( ! empty( $last_query_args ) ) {

			$args = $last_query_args;

			$args['post_type'] = ( 'listings' !== $listings_post_type ) ? $listings_post_type : apply_filters( 'stm_listings_post_type', 'listings' );

			// get rid of 'paged', just in case there's one
			if ( isset( $args['paged'] ) && ! empty( $args['paged'] ) ) {
				unset( $args['paged'] );
			}

			if ( ! empty( $last_query_link ) ) {
				$back_inventory_link = esc_url( $last_query_link );
			}
		}
	} else {

		delete_transient( 'stm_last_query_args_' . $query_post_type . $fake_id );
		delete_transient( 'stm_last_query_link_' . $query_post_type . $fake_id );

		if ( ! empty( $modern_inventory_query ) ) {
			// if cookie contains valid json string and is decodable
			if ( is_array( $modern_inventory_query ) ) {
				foreach ( $modern_inventory_query as $tax => $terms ) {
					if ( 'listing_status' === $tax ) {
						// active or sold status
						if ( 1 === count( $terms ) ) {
							$args['meta_query'][] = array(
								'key'     => 'car_mark_as_sold',
								'value'   => ( 'listing_is_active' === $terms[0] ) ? '' : 'on',
								'compare' => '=',
							);
						}
					} elseif ( 'min_price' === $tax ) {
						$args['meta_query'][] = array(
							'key'     => 'stm_genuine_price',
							'value'   => $terms[0],
							'type'    => 'DECIMAL',
							'compare' => '>=',
						);
					} elseif ( 'max_price' === $tax ) {
						$args['meta_query'][] = array(
							'key'     => 'stm_genuine_price',
							'value'   => $terms[0],
							'type'    => 'DECIMAL',
							'compare' => '<=',
						);
					} else {
						// the rest of the filters
						$_value = array();
						if ( ! empty( $terms ) ) {
							foreach ( $terms as $term ) {
								$exploded = explode( '-', $term );
								array_pop( $exploded );
								if ( count( $exploded ) > 1 ) {
									$_value[] = implode( '-', $exploded );
								} else {
									$_value[] = $exploded[0];
								}
							}
						}

						$args['tax_query'][] = array(
							'taxonomy' => $tax,
							'field'    => 'slug',
							'terms'    => $_value,
						);
					}
				}
			}
		}

		$modern_inventory_link = get_transient( 'stm_modern_inventory_link_' . $fake_id );

		// previous page was a modern inventory
		if ( ! empty( $modern_inventory_link ) ) {
			$back_inventory_link = esc_url( $modern_inventory_link );
		}
	}
}