<?php
error_reporting(E_ALL);
/*interface IPlugin {
	function getEvents();
	function React($Event);
	function eventExists($Event);
}

interface IPluggable {
	function fireEvent($Event);
	function getHandlers($Event);
	function listPlugins();
	function eventExists($Event);
	function Register($Plugin,$Event);
}*/

class Plugin {
	protected $Events;
	protected function eventExists($Event) {
		return in_array($Event, $this->Events);
	}
	public function React($Event,$Object) {
		if($this->eventExists($Event)) {
			$this->Events[$Event]($Object);
		}
	}
	public function getEvents() {
		return $this->Events;
	}	
}
class PluggableObject {
	protected $Events;
	protected function fireEvent($Event) {
		//echo "Firing event \"$Event\"\n";
		if($this->eventExists($Event)) {	
			foreach($this->getHandlers($Event) as $Handler) {
		//		echo "Plugin found! Plugin: $Handler\n";
				$Plugin = new $Handler;
				$Plugin->React($Event,$this);
			}			
		} else {
			echo "Event does not exist! (\"$Event\")\n";
			die("Events that DO exist: ".print_r($this->Events,1));
		}
	}
	protected function eventExists($Event) {
		return in_array($Event, $this->Events);
	}
	protected function listPlugins() {
		return join(", ", $this->Plugins).".";
	}
	protected function getHandlers($Event) {
		return $this->Events[$Event];
	}
	public function Register($Plugin, $Event) {
		if($this->eventExists($Event)) {
			$this->Events[$Event][] = $Plugin;
		}
	}	
}

class Athlete extends PluggableObject/* implements IPluggable*/ {
	private $Energy = 100;
	private $Miles;
	private $Name;
	const MilesEnergyRatio = 10.5;
	const Tired = "I'm tired!";
	private $Plugins = array();
	protected $Events = array(Athlete::Tired);	
	public function Run($Miles) {
		if(is_numeric($Miles) && $Miles > 0) {
			$Miles = round($Miles,2);
			if($this->Energy > ($Miles * Athlete::MilesEnergyRatio)) {
				$this->Miles += $Miles;
				$this->Energy -= $Miles * Athlete::MilesEnergyRatio;
				echo "I'm running $Miles miles!\n";
				if($this->Energy <= 1) {echo Athlete::Tired."\n"; $this->fireEvent(Athlete::Tired);}

			} else {
				$Runable = $this->Energy / Athlete::MilesEnergyRatio;
				$Runable = round($Runable,2);
				echo "I could not run $Miles miles, so I'm running $Runable miles!\n";
				$this->Run($Runable); 
				
				
			}
			
//			print "DEBUG:\n\tEnergy: ".$this->Energy."\n\tFull: ".$this->Full."%\n";
		}
	}
	public function Set($Variable, $Value) {
		$this->{$Variable} = $Value;
	}
	public function Get($Variable) {
		return $this->{$Variable};
	}
	public function __construct($Name) {
		$this->Name = $Name;
	}
		

}

class Rest extends Plugin /*implements IPlugin */{
	protected $Events = array(Athlete::Tired);
	public function __construct() {
		$this->Events[Athlete::Tired] = create_function('$Athlete',
					'if($Athlete instanceof Athlete) {
						echo "I\'m resting...\n";
						$Athlete->Set("Energy",100);
					 }');
//	echo "I'm being created!\n";
	}
}

$John = new Athlete("John");
$John->Register("Rest",Athlete::Tired);
$John->Run(3);
$John->Run(4);
print $John->Get("Name")."'s energy: ".$John->Get("Energy")."\n";
$John->Run(3);
print $John->Get("Name")."'s energy: ".$John->Get("Energy")."\n";
$John->Run(2);
print $John->Get("Name")."'s energy: ".$John->Get("Energy")."\n";
?>