<?php
declare(strict_types=1);

namespace HttpServer\Route;


use Closure;
use HttpServer\IInterface\After;
use HttpServer\IInterface\Middleware;
use Snowflake\Core\Json;

class Reduce
{


    /**
     * @param $last
     * @param $middleWares
     * @return mixed
     */
    public static function reduce($last, $middleWares): mixed
    {
        return array_reduce(array_reverse($middleWares), static::core(), $last);
    }


    /**
     * @param $middleWares
     * @return mixed
     */
    public static function after($middleWares): mixed
    {
        return array_reduce(array_reverse($middleWares), function ($stack, $pipe) {
            return function ($request, $passable) use ($stack, $pipe) {
                if (!($pipe instanceof After)) {
                    return call_user_func($pipe, $request, $passable, $stack);
                }
                return $pipe->onHandler($request, $passable);
            };
        });
    }


    /**
     * @return Closure
     */
    private static function core(): Closure
    {
        return function ($stack, $pipe) {
            return static::passable($stack, $pipe);
        };
    }


    /**
     * @param $stack
     * @param $pipe
     * @return Closure
     */
    public static function passable($stack, $pipe): Closure
    {
        return function ($passable) use ($stack, $pipe) {
            if ($pipe instanceof Middleware) {
                return $pipe->onHandler($passable, $stack);
            }
            return call_user_func($pipe, $passable, $stack);
        };
    }

}