<?php

namespace WPFormsFormPages\Admin;

/**
 * Form Pages AJAX related functionality.
 *
 * @since 1.0.0
 */
class Ajax {

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 */
	public function __construct() {

		$this->init();
	}

	/**
	 * Initialize.
	 *
	 * @since 1.0.0
	 */
	public function init() { // phpcs:ignore WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks

		add_filter( 'wpforms_builder_save_form_response_data', [ $this, 'change_form_slug' ], 10, 3 );
		add_action( 'wpforms_builder_save_form', [ $this, 'add_to_location_meta' ], 10, 2 );
	}

	/**
	 * Add form page to location meta.
	 *
	 * @since 1.9.0
	 *
	 * @param int|mixed $form_id Form ID.
	 * @param array     $data    Form data.
	 */
	public function add_to_location_meta( $form_id, array $data ) {

		$locator = wpforms()->obj( 'locator' );

		if ( ! $locator ) {
			return;
		}

		$locator->add_standalone_location_to_locations_meta( (int) $form_id, $data );
	}

	/**
	 * Change form slug.
	 *
	 * @since 1.0.0
	 *
	 * @param array $response Form save response data.
	 * @param int   $form_id  Form ID.
	 * @param array $data     Form data.
	 *
	 * @return array
	 */
	public function change_form_slug( $response, $form_id, $data ) {

		// Check required data, settings, and permissions.
		if (
			empty( $form_id ) ||
			empty( $data['settings']['form_pages_enable'] ) ||
			! wpforms_current_user_can( 'edit_forms' )
		) {
			return $response;
		}

		$form_slug = ! empty( $data['settings']['form_pages_page_slug'] ) ? sanitize_title( $data['settings']['form_pages_page_slug'] ) : '';

		if ( empty( $form_slug ) ) {
			$form = wpforms()->obj( 'form' )->get( $form_id );

			// Return original slug if user input is empty.
			$response['form_pages'] = [
				'slug' => isset( $form->post_name ) ? $form->post_name : '',
				'url'  => esc_url( home_url( isset( $form->post_name ) ? $form->post_name : '' ) ),
			];

			return $response;
		}

		$unique_slug = $this->unique_slug( $form_slug, $form_id );

		$result = wp_update_post(
			[
				'ID'        => $form_id,
				'post_name' => $unique_slug,
			]
		);

		if ( $result !== $form_id ) {
			return $response;
		}

		$response['form_pages'] = [
			'slug' => $unique_slug,
			'url'  => esc_url( home_url( $unique_slug ) ),
		];

		return $response;
	}

	/**
	 * Check if the slug is unique.
	 *
	 * @since 1.0.0
	 *
	 * @param string $slug    Slug to check.
	 * @param int    $post_id Post ID to exclude from the search.
	 *
	 * @return string
	 */
	public function unique_slug( $slug, $post_id ) {

		global $wpdb;

		$check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_type != 'nav_menu_item' AND post_name = %s AND ID != %d LIMIT 1";

		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.NotPrepared
		$post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_id ) );

		if ( $post_name_check === null ) {
			return $slug;
		}

		$suffix = 2;

		do {
			$alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";

			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.NotPrepared
			$post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_id ) );

			$suffix ++;
		} while ( $post_name_check );

		return $alt_post_name;
	}
}