<?php

namespace WorkflowBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use WorkflowBundle\Utils\WorkFlowEntityClasses;

class WorkflowApplyCommand extends ContainerAwareCommand
{
    protected function configure()
    {
        $this
            ->setName('workflow:apply')
            ->setDescription('Ejecuta una transici�n (de un workflow) en una entidad')
            ->setHelp('Ejecuta un Action (WorflowBundle\Entity\Action) de workflow para una Entidad (WorkflowBundle\Utils\WorkFlowEntityClasses)')
            ->addOption(
                'transition',
                null,
                InputOption::VALUE_REQUIRED,
                'Transition name'
            )
	    ->addOption(
                'workflow',
                null,
                InputOption::VALUE_REQUIRED,
                'Workflow name'
            )
            ->addOption(
                'entity',
                null,
                InputOption::VALUE_REQUIRED,
                'Entity Class. Possible values: ' . implode(', ', WorkFlowEntityClasses::getConstants()) 
            )
            ->addOption(
                'id',
                null,
                InputOption::VALUE_REQUIRED,
                'Entity id'
            )
            ->addOption(
                'no-filters',
                null,
                InputOption::VALUE_NONE,
                'disable doctrine orm filters'
            )

        ;
    }

    /**
     * @param InputInterface $input
     * @param OutputInterface $output
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $entity_manager = $this->getContainer()->get("doctrine.orm.entity_manager");
        
        $transition = $input->getOption('transition');
        $workflow = $input->getOption('workflow');
        $entityClass = $input->getOption('entity');
        
        $no_filters = $input->getOption('no-filters');
        if ($no_filters) {
            foreach ($entity_manager->getFilters()->getEnabledFilters() as $filter_name => $filter) {
                $entity_manager->getFilters()->disable($filter_name);
            }
        }
        
        $entityId = $input->getOption('id');
        if (!class_exists($entityClass)) {
            $output->writeln("Class '$entityClass' not found");
            
            return;
        }
        
        $entity = $entity_manager->getRepository($entityClass)->find($entityId);
        if (!$entity) {
            $output->writeln("Entity $entityClass with id $entityId not found");
            
            return;
        }
        
        // Si no se pasa workflow como parametro se busca según el workflow que tenga
        // asignado la $entity
        if (is_null($workflow)) {
            $workflow = "{$entity->getWorkflowType()}.{$entity->getWorkflowName()}";
        }
        
        $wreg = $this->getContainer()->get("workflow.registry");
        try {
            $wf = $wreg->get($entity, $workflow);
        } catch (\Exception $ex) {
            $wf = $this->getContainer()->get($workflow);
        }
        $transitions = array_map(function($obj) {
            return $obj->getName();
        }, $wf->getEnabledTransitions($entity));
        
        if (!in_array($transition, $transitions)) {
            $output->writeln("Can't apply transition '$transition', only allowed transitions for this entity are '". implode("','", $transitions). "'");
            
            return;
        }
        
        $from = array_keys($wf->getMarking($entity)->getPlaces());
        $newState = $wf->apply($entity, $transition);
        $entity_manager->persist($entity);
        $entity_manager->flush($entity);
        
        $to = array_keys($wf->getMarking($entity)->getPlaces());
        
        $output->writeln("Applyed ".  $transition . "(".(string)$entity. ") : " . json_encode($from) . " -> " . json_encode($to));
    }
}