<?php

namespace TemplateBundle\Services;

use Base\AdminBundle\Controller\AuditReaderService;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\EntityRepository;
use SimpleThings\EntityAudit\AuditReader;
use TemplateBundle\Entity\Template;

class TemplateService
{

    const TEMPLATE_PATH = '/tmp/flowdat/templates';

    /**
     * @var EntityManagerInterface
     */
    private $entityManager;
    /**
     * @var AuditReaderService
     */
    private $auditReader;

    /**
     * @var EntityRepository
     */
    private $templateRepository;


    /**
     * @param EntityManagerInterface $entityManager
     * @param AuditReader $auditReader
     */
    public function __construct(EntityManagerInterface $entityManager, AuditReaderService $auditReader)
    {
        $this->entityManager = $entityManager;
        $this->auditReader = $auditReader;
        $this->templateRepository = $entityManager->getRepository('TemplateBundle:Template');
    }

    /**
     * @param string $name
     *
     * @return Template
     */
    public function getTemplateByName($name)
    {
        return $this->templateRepository->findOneByName($name);
    }

    /**
     * @param string $name
     * @param array $params
     * @param string $filename
     * @param string $engine
     *
     * @return string
     */
    public function renderTemplate($name, $params = array(), $filename = null, $engine = 'twig')
    {
        $content = null;
        $template = $this->getTemplateByName($name);
        $params = array('em' => $this->entityManager, 'baars' => $this->auditReader) + $params;
        if (!is_null($template)) {
            $content = $this->render($template, $params, $engine);
            var_dump($content);
            $filename = $this->createFile($content, $filename);
        } else {
            throw new \Exception("Template {$name} not found");
        }

        return $filename;
    }

    /**
     * @param Template $template
     * @param array $params
     * @param string $engine
     *
     * @return string
     */
    public function render($template, $params = array(), $engine = 'twig')
    {
        if ($engine == 'twig') {
            $loader = new \Twig_Loader_Array(array(
                $template->getName() => $template->getContent()
            ));
            $twig = new \Twig_Environment($loader, array(
                'cache' => false,
            ));

            $content = $twig->render($template->getName(), $params);
        } elseif ($engine == 'dwoo') {
            $core = new \Dwoo\Core();

            $tpl = new \Dwoo\Template\Str($template->getContent());

            $data = new \Dwoo\Data();
            $data->setData($params);

            $content = $core->get($tpl, $data);
        } else {
            throw new \Exception("Invalid {$engine} engine value");
        }

        return $content;
    }

    /**
     * @param string $content
     * @param string $filename
     *
     * @return string
     */
    public function createFile($content, $filename = null)
    {
        if (is_null($filename)) {
            $filename = self::TEMPLATE_PATH . DIRECTORY_SEPARATOR . uniqid();
        }
        $pieces = explode(DIRECTORY_SEPARATOR, $filename);
        $file = array_pop($pieces);
        $dir = DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $pieces);
        if (!file_exists($dir)) {
            mkdir($dir, 0777, true);
        }
        file_put_contents($dir . DIRECTORY_SEPARATOR . $file, $content);

        return $filename;
    }
    
    /**
     * Retorna si encuentra un template en la db con nombre = $name
     * 
     * @param string $name
     *
     * @return boolean
     */
    public function exists($name) 
    {
        $template = $this->getTemplateByName($name);
        
        return !is_null($template);
    }

}