<?php
/* Please see the README and LICENSE files. */

/**
 * The system maintains a reference to each of the started components and is
 * thus able to stop them if required.
 */

class System {
    /**
     * The components that got started
     * @var System_Component[]
     */
    protected $components;
    
    /**
     * The running timmer
     * @var System_Timer
     */
    protected $timer;
    
    /**
     * Start a new system
     * @param String[] $component_array 
     */
    public function __construct($component_array){
        $this->start_components($component_array);
        $this->timer = new System_Timer();
    }
    
    /**
     * Destroy the systme
     */
    public function __destruct() {
        if(!System_Shutdown::$triggered){
            echo("System shutdown");
            System_Shutdown::shutdown();
        }
        //echo(sprintf("<span style=\"font-size:12px;color:#000\">Debug Diagnostics<br/>Pageload %s s<br/>Max Mem. %s b</span>",  number_format($this->timer->stop(),3),  memory_get_peak_usage()));
    }
    
    /**
     * Start each component
     * 
     * @param String[] $component_array
     * @return Boolean false if array is corrupt
     */
    protected function start_components($component_array){
        if(!is_array($component_array) || count($component_array)<1){
            trigger_error("Bad input for component array");
            return false;
        }
        foreach($component_array as $component_name){            
            $this->components[] = new $component_name();
            end($this->components)->start();                
        }
        return true;
    }
    
    /**
     *  Stop all of the components
     */
    public function stop_components(){
        foreach($this->components as $component){
            $this->stop_component($component);
        }
    }
    
    /**
     * Stop a specific component
     * @param System_Component $class
     */
    public function stop_component($class){
        if($class instanceof System_Component){
            return $class->stop();
        } else if(strlen($class)>0) {
           foreach($this->components as $component){
                if(get_class($component)==$class){
                    return $component->stop();
                }
            }
        }
        return false;
    }
    
    /**
     * tock
     */
    public function tick($text){
        $this->timer->tick($text);
    }
    
    public function get_time(){
        $this->timer->stop();
        return $this->timer->get_time();
    }
}

?>