<?php

namespace App\Http\Controllers;

use App\Post;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\File;
use Intervention\Image\Constraint;
use Intervention\Image\Facades\Image;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;

class ImageController extends Controller
{
    /**
     * @param int $post_id
     * @param string|array $options
     * @param string $image
     *
     * @return mixed
     */
    public function display($post_id, $options = 'o:full', $image)
    {
        if (Auth::guest()) {
            throw new UnauthorizedHttpException('Vous devez être connecté pour voir cette image.');
        }

        $post = Post::find($post_id);

        if (Auth::user()->getAuthIdentifier() !== (int)$post->user_id) {
            throw new UnauthorizedHttpException('Cette image ne vous appartient pas.');
        }

        $original = sprintf('%s/%s/%s', storage_path('app'), Auth::user()->getFolder(), $image);
        $thumb = sprintf('%s/%s/300-%s', storage_path('app'), Auth::user()->getFolder(), $image);
        $img = Image::make($original);
        if ('o:full' === $options) {
            if (!is_readable($original)) {
                throw new NotFoundHttpException();
            }
        } elseif (!is_readable($thumb)) {
            if (!is_readable($original)) {
                throw new NotFoundHttpException();
            }
            $options = explode('!', $options);
            $width = null;
            $height = null;
            foreach ($options as $option) {
                [$current_option_name, $current_option_value] = explode(':', $option);
                switch ($current_option_name) {
                    case 'w':
                        $width = $current_option_value;
                        break;
                    case 'h':
                        $height = $current_option_value;
                        break;
                }
            }
            //http://image.intervention.io/getting_started/
            $img->resize($width, $height, static function (Constraint $constraint) {
                $constraint->aspectRatio();
            })->save(sprintf('%s/%s/%s', storage_path('app'), Auth::user()->getFolder(), sprintf('300-%s', $image)));
        } else {
            $img = Image::make($thumb);
        }

        return $img->response(File::extension($original));
    }

    /**
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function gallery()
    {
        $posts_with_image = Post::where('user_id', Auth::user()->getAuthIdentifier())
            ->where('image', '!=', 'null')
            ->orderBy('created_at', 'desc')
            ->paginate(30);

        return view('gallery.my', [
            'posts' => $posts_with_image,
        ]);
    }
}