<?php
/**
 * Block Registration
 *
 * Registers all Acumenpopup blocks from the build directory.
 *
 * @since      1.0.0
 * @package    Acumenpopup
 * @subpackage Acumenpopup/includes/Blocks
 */

namespace Acumenpopup\Blocks;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class Register
 *
 * Manages block registration for the plugin (Singleton).
 *
 * @since   1.0.0
 * @package Acumenpopup
 */
class Register {

	/**
	 * The single instance of the class.
	 *
	 * @since  1.0.0
	 * @access private
	 * @var    Register|null
	 */
	private static $instance = null;

	/**
	 * Array of block names to register.
	 *
	 * @since  1.0.0
	 * @access private
	 * @var    array
	 */
	private $blocks = array(
		'popup-builder',
		'advanced-heading',
		'container',
		'advanced-image',
		'paragraph',
		'button',
		'icon',
		'form',
		'text',
		'email',
		'message',
	);

	/**
	 * Private constructor to prevent direct instantiation.
	 *
	 * @since  1.0.0
	 * @access private
	 */
	private function __construct() {
		$this->init_hooks();
	}

	/**
	 * Get the single instance of the Register class.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return Register The single instance.
	 */
	public static function get_instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	/**
	 * Initialize WordPress hooks.
	 *
	 * @since  1.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function init_hooks() {
		add_action( 'init', array( $this, 'register_blocks' ) );
		// check if the theme is not a block theme
		if( ! wp_is_block_theme() ) {
			add_filter( 'should_load_separate_core_block_assets', '__return_true' );
		}
	}

	/**
	 * Register all Acumenpopup blocks.
	 *
	 * Loops through the blocks array and registers each block
	 * from its block.json in the build directory.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function register_blocks() {
		$build_dir = trailingslashit( ACUMENPOPUP_PLUGIN_DIR ) . 'build/blocks/';

		foreach ( $this->blocks as $block ) {
			$block_path = $build_dir . $block;

			// Only register if block.json exists.
			if ( file_exists( $block_path . '/block.json' ) ) {
				register_block_type( $block_path );
			}
		}
	}

	/**
	 * Get the list of registered block names.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return array Array of block names.
	 */
	public function get_blocks() {
		return $this->blocks;
	}

	/**
	 * Add a block to the registration list.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @param string $block_name The block name (without prefix).
	 *
	 * @return void
	 */
	public function add_block( $block_name ) {
		if ( ! in_array( $block_name, $this->blocks, true ) ) {
			$this->blocks[] = sanitize_key( $block_name );
		}
	}

	/**
	 * Remove a block from the registration list.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @param string $block_name The block name to remove.
	 *
	 * @return void
	 */
	public function remove_block( $block_name ) {
		$key = array_search( $block_name, $this->blocks, true );
		if ( false !== $key ) {
			unset( $this->blocks[ $key ] );
			$this->blocks = array_values( $this->blocks );
		}
	}

	/**
	 * Prevent cloning of the instance.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function __clone() {
		_doing_it_wrong(
			__FUNCTION__,
			esc_html__( 'Cloning is forbidden.', 'acumen-popup' ),
			'1.0.0'
		);
	}

	/**
	 * Prevent unserializing of the instance.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function __wakeup() {
		_doing_it_wrong(
			__FUNCTION__,
			esc_html__( 'Unserializing is forbidden.', 'acumen-popup' ),
			'1.0.0'
		);
	}
}