<?php
class Module
{
  protected static $performanceStopwatch = [];
  protected $error = 0;
  protected $result = "";
  protected $variables = [];
  protected $createdAt;

  public function __construct($err = 0)
  {
    $this->createdAt = microtime(true);
    $this->setError($err);
  }

  public function init($data = [])
  {
    $this->triggerEvent('beforeInit');
    if (!empty($data)) {
      $this->adds($data);
    }
    $this->triggerEvent('afterInit');
  }

  public function setResult($msg = "")
  {
    $this->result = $msg;
  }

  public function getResult()
  {
    return $this->result;
  }

  public function setError($err = 0)
  {
    $this->error = $err;
  }

  public function getError()
  {
    return $this->error;
  }

  public function get($key)
  {
    return array_key_exists($key, $this->variables) ? $this->variables[$key] : null;
  }

  public function gets()
  {
    $args = func_get_args();
    $ret = new stdClass();
    foreach ($args as $arg) {
      $ret->$arg = $this->get($arg);
    }
    return $ret;
  }

  public function add($key, $val)
  {
    $this->variables[$key] = $val;
  }

  public function adds($obj)
  {
    if (is_object($obj)) {
      $obj = get_object_vars($obj);
    }

    if (is_array($obj)) {
      foreach ($obj as $k => $v) {
        $this->variables[$k] = $v;
      }
    }
  }

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

  public 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'] ? $backtrace[1]['function'] : 'global scope';
      $this->addStopwatch("{$cf} {$key}");
    }
  }

  public function addEventHandler($event, $callback)
  {
    EventHandler::addEventHandler($event, $callback);
  }

  protected static function triggerEvent($event, $data = [])
  {
    EventHandler::triggerEvent($event, $data);
  }
}