<?php
/**
 * THIS MODULE PROHIBITS DISTRIBUTION TO OTHERS WITHOUT AUTHOR'S PERMISSION.
 * Base Module (minimum support version)
 * @author arcturus (https://info.drk.st/about contact@drk.st)
 */

include_once __DIR__ . "/event.php";

class EventHandler
{
  protected static $eventHandlers = [];
  protected static $performanceStopwatch = [];
  protected static $createdAt;

  public function __construct()
  {
    $this->createdAt = microtime(true);
  }

  protected static function addStopwatch($key)
  {
    if (defined("__IS_DEBUG__")) {
      if (count(self::$performanceStopwatch) > 0) {
        $prev = end(self::$performanceStopwatch);
        self::$performanceStopwatch[$key] = microtime(true) - self::$createdAt - $prev;
      } else {
        self::$performanceStopwatch[$key] = microtime(true) - self::$createdAt;
      }
    }
  }

  public static function addStopwatchWithCallStack($key)
  {
    if (defined("__IS_DEBUG__")) {
      if ($key === 0)
        $key = "start";
      else if ($key === 1)
        $key = "end";
      $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
      $cf = $backtrace[1]['function'] ?? 'global scope';
      self::addStopwatch("{$cf} {$key}");
    }
  }

  public static function addEventHandler($event, $callback, $priority = 10)
  {
    if (!isset(self::$eventHandlers[$event])) {
      self::$eventHandlers[$event] = [];
    }
    self::$eventHandlers[$event][] = new Event($callback, $priority);
  }

  public static function triggerEvent($event, ...$data)
  {
    if (isset(self::$eventHandlers[$event])) {
      foreach (self::$eventHandlers[$event] as $callback) {
        $callback->getAction($data);
      }
    }
  }
}