<?php
/**
 * EPPRO_Advanced_Search_Handler
 *
 * Handles AJAX live-search requests for the Advanced Search widget.
 * Registered early so both logged-in and guest users can use it.
 *
 * @package AdMoreWidgetsSuite
 * @since   1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) exit;

class EPPRO_Advanced_Search_Handler {

    public static function init(): void {
        add_action( 'wp_ajax_eppro_live_search',        [ __CLASS__, 'handle' ] );
        add_action( 'wp_ajax_nopriv_eppro_live_search', [ __CLASS__, 'handle' ] );
    }

    public static function handle(): void {
        if ( ! check_ajax_referer( 'eppro_live_search', '_wpnonce', false ) ) {
            wp_send_json_error( [ 'code' => 'invalid_nonce', 'message' => __( 'Your session has expired. Please reload the page.', 'admore-widgets-suite' ) ], 403 );
        }

        $query      = sanitize_text_field( wp_unslash( $_POST['query'] ?? '' ) );
        $post_types = array_map( 'sanitize_key', (array) ( $_POST['post_types'] ?? [ 'post', 'page' ] ) );
        $max_result = min( 20, absint( $_POST['max_results'] ?? 6 ) );

        if ( mb_strlen( $query ) < 2 ) {
            wp_send_json_success( [ 'results' => [] ] );
        }

        $allowed_types = get_post_types( [ 'public' => true ], 'names' );
        $post_types    = array_values( array_intersect( $post_types, $allowed_types ) );
        if ( empty( $post_types ) ) {
            $post_types = [ 'post', 'page' ];
        }

        $args = [
            'post_type'      => $post_types,
            'post_status'    => 'publish',
            'posts_per_page' => $max_result,
            's'              => $query,
            'no_found_rows'  => true,
        ];

        // Category filter: taxonomy + term_id
        $taxonomy = sanitize_key( wp_unslash( $_POST['taxonomy'] ?? '' ) );
        $term_id  = absint( $_POST['term_id'] ?? 0 );
        if ( $taxonomy && $term_id && taxonomy_exists( $taxonomy ) ) {
            $args['tax_query'] = [
                [
                    'taxonomy' => $taxonomy,
                    'field'    => 'term_id',
                    'terms'    => $term_id,
                ],
            ];
        }

        $search = new WP_Query( $args );
        $results = [];

        if ( $search->have_posts() ) {
            foreach ( $search->posts as $post ) {
                $thumb_url = '';
                if ( has_post_thumbnail( $post->ID ) ) {
                    $thumb_url = get_the_post_thumbnail_url( $post->ID, 'thumbnail' );
                }

                $excerpt = '';
                if ( post_password_required( $post ) ) {
                    // Never reveal any part of a password-protected post.
                    $excerpt = '';
                } elseif ( ! empty( $post->post_excerpt ) ) {
                    $excerpt = wp_trim_words( $post->post_excerpt, 12, '…' );
                } elseif ( ! empty( $post->post_content ) ) {
                    $excerpt = wp_trim_words( wp_strip_all_tags( $post->post_content ), 12, '…' );
                }

                $pt_obj = get_post_type_object( $post->post_type );

                $results[] = [
                    'id'        => $post->ID,
                    'title'     => get_the_title( $post ),
                    'url'       => get_permalink( $post ),
                    'type'      => $pt_obj ? $pt_obj->labels->singular_name : $post->post_type,
                    'thumbnail' => $thumb_url,
                    'excerpt'   => $excerpt,
                ];
            }
        }

        wp_reset_postdata();
        wp_send_json_success( [ 'results' => $results ] );
    }
}