<?php
/**
 * The block for the Gutenberg editor.
 *
 * Without a single library and without a build step. The block is written in
 * plain JavaScript, so the file that goes to WordPress.org is the very one we
 * wrote. That is also a directory requirement: the code has to be readable.
 *
 * Copyright (c) 2026 Quantum, Serbia. https://2ranq.com
 *
 * This program is free software: you can redistribute it and change it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 2 of the License, or any later version. The full
 * text is in LICENSE.txt, next to this file.
 *
 * @package Ranq_Forms
 */

defined( 'ABSPATH' ) || exit;

/**
 * Ranq_Forms_Gutenberg
 */
class Ranq_Forms_Gutenberg {

	/**
	 * The block name.
	 */
	const BLOCK = 'ranq/form';

	/**
	 * Hooks up.
	 *
	 * @return void
	 */
	public static function hooks() {

		add_action( 'init', array( __CLASS__, 'register' ) );
		add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'editor_assets' ) );
	}

	/**
	 * Registers the block.
	 *
	 * @return void
	 */
	public static function register() {

		if ( ! function_exists( 'register_block_type' ) ) {
			return;
		}

		// A block name MUST start with a letter. `2ranq/form` is invalid and WordPress
		// would skip it quietly, without a single error in the log.
		register_block_type(
			self::BLOCK,
			array(
				'api_version'     => 2,
				'attributes'      => array(
					'formId'   => array(
						'type'    => 'number',
						'default' => 0,
					),
					'widgetId' => array(
						'type'    => 'number',
						'default' => 0,
					),
				),
				'render_callback' => array( __CLASS__, 'render' ),
			)
		);
	}

	/**
	 * Rendering on the site. It goes through the same path as the shortcode, so
	 * the look is the same.
	 *
	 * @param array $attributes The block settings.
	 *
	 * @return string
	 */
	public static function render( $attributes ) {

		// The widget number wins. When a whole section is chosen, the form inside it
		// renders on its own, so it must not be rendered a second time.
		$widget_id = isset( $attributes['widgetId'] ) ? absint( $attributes['widgetId'] ) : 0;

		if ( $widget_id ) {
			return Ranq_Forms_Widget::shortcode( array( 'id' => $widget_id ) );
		}

		$form_id = isset( $attributes['formId'] ) ? absint( $attributes['formId'] ) : 0;

		if ( ! $form_id ) {
			return '';
		}

		return Ranq_Forms_Shortcode::render( array( 'id' => $form_id ) );
	}

	/**
	 * The editor assets. Loaded only in the editor, never on the site.
	 *
	 * @return void
	 */
	public static function editor_assets() {

		wp_enqueue_script(
			'ranq-forms-block',
			RANQ_FORMS_URL . 'assets/js/block.js',
			array( 'wp-blocks', 'wp-element', 'wp-components', 'wp-block-editor', 'wp-server-side-render', 'wp-i18n' ),
			RANQ_FORMS_VERSION,
			true
		);

		// The form style sheet, so the block in the editor looks the way it will look.
		wp_enqueue_style(
			'ranq-forms',
			RANQ_FORMS_URL . 'assets/css/form.css',
			array(),
			RANQ_FORMS_VERSION
		);

		wp_localize_script(
			'ranq-forms-block',
			'ranqFormsBlock',
			array(
				'forms'   => self::form_list(),
				'widgets' => Ranq_Forms_Widget::all_widgets(),
				'newUrl'  => admin_url( 'admin.php?page=' . Ranq_Forms_Admin::PAGE_NEW ),
				'i18n'    => array(
					'title'       => __( '2ranq Form', '2ranq-forms' ),
					'description' => __( 'Drop one of your forms into the page.', '2ranq-forms' ),
					'chooseForm'  => __( 'Which form', '2ranq-forms' ),
					'withSection' => __( 'with contact section', '2ranq-forms' ),
					'noForms'     => __( 'You have no forms yet.', '2ranq-forms' ),
					'createOne'   => __( 'Create your first form', '2ranq-forms' ),
					'pickOne'     => __( 'Choose a form to show here.', '2ranq-forms' ),
					'settings'    => __( 'Form', '2ranq-forms' ),
					'editForm'    => __( 'Edit this form', '2ranq-forms' ),
				),
			)
		);
	}

	/**
	 * The list of forms for the drop down.
	 *
	 * @return array
	 */
	public static function form_list() {

		$forms = get_posts(
			array(
				'post_type'     => Ranq_Forms_Post_Type::POST_TYPE,
				'post_status'   => array( 'publish', 'draft' ),
				'numberposts'   => 200,
				'orderby'       => 'title',
				'order'         => 'ASC',
				'no_found_rows' => true,
			)
		);

		$list = array();

		foreach ( $forms as $form ) {
			$list[] = array(
				'id'      => (int) $form->ID,
				'title'   => get_the_title( $form ),
				'fields'  => count( Ranq_Forms_Fields::get_form_fields( $form->ID ) ),
				'editUrl' => admin_url( 'admin.php?page=' . Ranq_Forms_Admin::PAGE . '&form_id=' . $form->ID ),
			);
		}

		return $list;
	}
}