<?php

namespace WorkflowBundle\Event;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Workflow\Event\Event;
use Symfony\Component\Workflow\Event\GuardEvent;
use WorkflowBundle\Services\ProducerService;
use Symfony\Component\DependencyInjection\ContainerInterface;

# Ayuda:
# http://blog.eleven-labs.com/en/symfony-workflow-component/
# https://github.com/lexik/LexikWorkflowBundle
# https://github.com/fduch/workflow-bundle


class EventSubscriber implements EventSubscriberInterface
{

    private $container;
    private $producerService;

    /**
     * @param ContainerInterface $container
     */
    public function __construct(ContainerInterface $container, ProducerService $producerService)
    {
        $this->container = $container;
        $this->producerService = $producerService;
    }

    public static function getSubscribedEvents()
    {
        return array(
                'workflow.leave' => array('leave'),
                'workflow.transition' => array('transition'),
                'workflow.enter' => array('enter'),
                'workflow.guard' => array('guard')
        );
    }

    public function leave(Event $event)
    {
        foreach ($event->getTransition()->getFroms() as $place) {
            $actions = $this->getActions($event, 'leave', $place);

            foreach($actions as $k => $action) {
                $params = array('entity'=>$event->getSubject());
                $this->completeAction($action, $params);

            }
            
        }

    }

    public function transition(Event $event)
    {
        $transitionName = $event->getTransition()->getName();

        $actions = $this->getActions($event, 'transition', $transitionName);

        foreach($actions as $k => $action) {
            $params = array('entity'=>$event->getSubject());
            $this->completeAction($action, $params);

        }

    }

    public function enter(Event $event)
    {
        foreach ($event->getTransition()->getTos() as $place) {
            $actions = $this->getActions($event, 'enter', $place);

            foreach($actions as $k => $action) {
                $params = array('entity'=>$event->getSubject());
                $this->completeAction($action, $params);
            }
        }
    }
    
    public function guard(GuardEvent $event)
    {
       //$event->setBlocked(true);
    }

    /**
     * @param Event $event
     * @param string $eventName
     * @param string $eventReference
     * 
     * @return array
     */
    public function getActions($event, $eventName, $eventReference)
    {
        $logger = $this->container->get('logger');

        $em = $this->container->get("doctrine.orm.entity_manager");
        $object = $event->getSubject();
        $objectClass = (string) get_class($object);
        $logger->info("EVENT {$eventName}:{$eventReference} => {$objectClass }_id_{$object->getId()}");

       $criteria = array("workflowName" => $event->getWorkflowName(), "eventReference" => $eventReference
       );
        $actions = $em->getRepository("WorkflowBundle:Action")->findBy($criteria);

       $new_actions = array();
       foreach($actions as $action){

               if(in_array($eventName, $action->getEvent()) AND is_a($object, $action->getObjectClass())){
                       $new_actions[] = $action;
               }       
       }
       $actions = $new_actions;
        $logger->info("EVENT Found ". count($actions) . " actions to apply", $criteria);

        return $actions;
    }

    public function completeAction($action, $params)
    {

        $logger = $this->container->get('logger');

        $object = $params['entity'];
        $this->producerService->publishMessage($action, $object);

        $template = $action->getTemplate();
        $twig = new \Twig_Environment(new \Twig_Loader_Array(array()));
        $tpl = $twig->createTemplate($template);
        $rendered = $tpl->render($params);

        $class = get_class($object);

        $logger->info("ACTION (action_id_{$action->getId()}) {$action->getName()} | Task: '{$rendered}' => {$class}_id_{$object->getId()}");

        // $string = file_get_contents("/var/flowdat/ftth/out.log");
        // $string .= "### Action id :".$action->getId().PHP_EOL;
        // $string .= "----------------------".PHP_EOL.$template.PHP_EOL;
        // $string .= "----------------------".PHP_EOL.$rendered.PHP_EOL.PHP_EOL;
        // file_put_contents("/var/flowdat/ftth/out.log", $string);
    }

}