<?php

namespace ChargeForms\Includes\Logic;

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

/**
 * PHP mirror of assets/src/builder/logic/operators/registry.js — same
 * registry shape, so an operator registered on one side has an obvious,
 * mechanical counterpart to register on the other. See milestone doc §4.5
 * "developer extension points from day one" and §4.3 "engine independence
 * from the UI" (this class has no dependency on Admin\* or Public\*).
 */
class Operator_Registry {

	private static $operators = [];

	/** $definition: [ 'id' => string, 'label' => string, 'applies_to' => string[], 'evaluate' => callable( $left, $right ): bool ]. */
	public static function register( array $definition ) {
		if ( empty( $definition['id'] ) || ! is_callable( $definition['evaluate'] ?? null ) ) {
			throw new \InvalidArgumentException( 'Operator_Registry::register() requires an id and an evaluate callable.' );
		}
		self::$operators[ $definition['id'] ] = $definition;
	}

	public static function get( $id ) {
		return self::$operators[ $id ] ?? null;
	}

	public static function all() {
		return array_values( self::$operators );
	}
}