<?php


namespace Snowflake;


use Exception;
use ReflectionException;
use Snowflake\Abstracts\Component;
use Snowflake\Exception\NotFindClassException;

defined('ASPECT_ERROR') or define('ASPECT_ERROR', 'Aspect annotation must implement ');


/**
 * Class Aop
 * @package Snowflake
 */
class Aop extends Component
{


    private array $_aop = [];


	/**
	 * @param array $handler
	 * @param string $aspect
	 */
    public function aop_add(array $handler, string $aspect)
    {
        [$class, $method] = $handler;
	    $alias = get_class($class) . '::' . $method;
	    if (!isset($this->_aop[$alias])) {
		    $this->_aop[$alias] = [];
	    }
	    if (in_array($aspect, $this->_aop[$alias])) {
		    return;
	    }
	    $this->_aop[$alias][] = $aspect;
    }


	/**
	 * @return mixed
	 * @throws NotFindClassException
	 * @throws ReflectionException
	 * @throws Exception
	 */
    final public function dispatch(): mixed
    {
        $get_args = func_get_args();
        if (($close = array_shift($get_args)) instanceof \Closure) {
            return call_user_func($close, ...$get_args);
        }

        $aopName = get_class($close[0]) . '::' . $close[1];
        if (!isset($this->_aop[$aopName])) {
            return call_user_func($close, ...$get_args);
        }

        $reflect = Snowflake::getDi()->getReflect(current($this->_aop[$aopName]));
        if (!$reflect->isInstantiable() || !$reflect->hasMethod('invoke')) {
            throw new Exception(ASPECT_ERROR . IAspect::class);
        }
        $method = $reflect->getMethod('invoke');

        return $method->invokeArgs($reflect->newInstance($close), $get_args);
    }


}