<?php namespace System\Classes;

use Lang;
use Response;
use Exception;
use SystemException;
use ApplicationException;
use Illuminate\Routing\Controller as ControllerBase;

/**
 * The is the master controller for system related routing.
 * It is currently only responsible for serving up the asset combiner contents.
 *
 * @see System\Classes\CombineAssets Asset combiner class
 * @package october\system
 * @author Alexey Bobkov, Samuel Georges, Luke Towers
 */
class SystemController extends ControllerBase
{
    /**
     * Combines JavaScript and StyleSheet assets.
     * @param string $name Combined file code
     * @return string Combined content.
     */
    public function combine($name)
    {
        try {
            if (!strpos($name, '-')) {
                throw new ApplicationException(Lang::get('system::lang.combiner.not_found', ['name' => $name]));
            }

            $parts = explode('-', $name);

            $cacheId = $parts[0];

            $combiner = CombineAssets::instance();

            return $combiner->getContents($cacheId);
        } catch (Exception $ex) {
            return Response::make('/* '.e($ex->getMessage()).' */', 500);
        }
    }

    /**
     * Resizes an image using the provided configuration
     * and returns a redirect to the resized image
     *
     * @param string $identifier The identifier used to retrieve the image configuration
     * @param string $source The name of the source the image is being resized from
     * @param string $name The filename of the resized image
     * @return RedirectResponse
     */
    public function resize(string $identifier, string $source, string $name)
    {
        // Attempt to process the resize
        try {
            $resizer = ImageResizer::fromIdentifier($identifier);
            $resizer->resize();
        } catch (SystemException $ex) {
            // If the resizing failed it was most likely because the config had already been
            // pulled from the cache so just continue to redirect the user to the final file anyways
        }

        return redirect()->to(ImageResizer::getResizedUrl($identifier, $source, $name));
    }
}