<?php

namespace TemplateBundle\Services;

use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\EntityRepository;
use TemplateBundle\Entity\Template;

class TemplateService
{
    
    const TEMPLATE_PATH = '/tmp/flowdat/templates';
    
    /**
     * @var EntityManagerInterface
     */
    private $entityManager;
    
    /**
     * @var EntityRepository 
     */
    private $templateRepository;


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