<?php

namespace TwoFAS\TwoFAS\Templates;

use Exception;
use Twig_Environment;
use Twig_Error_Loader;
use Twig_Error_Runtime;
use Twig_Error_Syntax;
use Twig_Loader_Filesystem;
use Twig_SimpleFunction;
use TwoFAS\TwoFAS\Exceptions\Handler\Error_Handler;
use TwoFAS\TwoFAS\Helpers\Config;
use TwoFAS\TwoFAS\Helpers\Flash;
use TwoFAS\TwoFAS\Helpers\URL;

class Twig {

	/**
	 * @var Twig_Environment
	 */
	private $twig;

	/**
	 * @var Error_Handler
	 */
	private $error_handler;

	/**
	 * @param Error_Handler $error_handler
	 * @param URL           $url
	 * @param Flash         $flash
	 * @param Config        $config
	 */
	public function __construct( Error_Handler $error_handler, URL $url, Flash $flash, Config $config ) {
		$twig_loader = new Twig_Loader_Filesystem( TWOFAS_TEMPLATES_PATH );
		$this->twig  = new Twig_Environment( $twig_loader );

		$this->twig->addGlobal( 'url', $url );
		$this->twig->addGlobal( 'flash', $flash );
		$this->twig->addGlobal( 'config', $config );

		$this->twig->addFunction( new Twig_SimpleFunction( 'login_header', 'login_header' ) );
		$this->twig->addFunction( new Twig_SimpleFunction( 'login_footer', 'login_footer' ) );

		$this->error_handler = $error_handler;
	}

	/**
	 * @param string $template_name
	 * @param array  $params
	 *
	 * @return string
	 */
	public function get_view( $template_name, array $params = array() ) {
		try {
			return $this->try_render( $template_name, $params );
		} catch ( Exception $e ) {
			return $this->error_handler->capture_exception( $e )->to_notification( $e );
		}
	}

	/**
	 * @param string $template_name
	 * @param array  $params
	 *
	 * @return string
	 *
	 * @throws Twig_Error_Loader
	 * @throws Twig_Error_Syntax
	 * @throws Twig_Error_Runtime
	 */
	public function try_render( $template_name, array $params = array() ) {
		$params['assets_url'] = TWOFAS_ASSETS_URL;
		$params['login_url']  = wp_login_url();

		return $this->twig->render( $template_name, $params );
	}
}