<?php

namespace WorkflowBundle\Event;

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

# 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
{

    /**
     * @var ContainerInterface
     */
    private $container;

    /**
     * @var ProducerService
     */
    private $producerService;

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

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

    /**
     * @param Event $event
     */
    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);
            }
        }
    }

    /**
     * @param Event $event
     */
    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);
        }
    }

    /**
     * @param Event $event
     */
    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);
            }
        }
    }

    /**
     * @param Event $event
     */
    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);
        if ($objectClass == 'FTTHBundle\\Entity\\ONU') {
            if (is_null($object->getLogOLT())) {
                $onuLogOlt = new ONULogOLT();
                $em->persist($onuLogOlt);
                $object->setLogOLT($onuLogOlt);
            }
            $object->getLogOLT()->setPending();
            $em->flush($object->getLogOLT());
        }
        $logger->info("EVENT {$eventName}:{$eventReference} => {$objectClass }_id_{$object->getId()}");

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

        $new_actions = array();
        foreach ($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", compact('workflowName', 'eventReference'));

        return $actions;
    }

    /**
     * @param Action $action
     * @param array $params
     */
    public function completeAction($action, $params)
    {
        $logger = $this->container->get('logger');
        $object = $params['entity'];
        $routing_key = "";
        if (getenv("AMQP_KEY") !== false) {
            $routing_key = getenv("AMQP_KEY");
        }

        $this->producerService->publishMessage($action, $object, $routing_key);

        $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);
    }

}