<?php


namespace App\Service;


use Imagine\Gd\Imagine;
use Imagine\Image\Box;
use Imagine\Image\ImageInterface;
use Symfony\Component\Yaml\Parser;
use Zend\Config\Reader\Yaml;

class GalleryService
{

    const CONFIG_FILE    = 'data/galleries/gallery.yaml';
    const IMAGE_BASEDIR  = 'data/galleries/%s/';
    const THUMBNAIL_SIZE = 250;

    protected $contentTypeMap = [
        'jpg'  => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'png'  => 'image/png',
    ];
    protected $config;

    public function listGalleries($includeHidden = false)
    {
        $config = $this->getConfig();
        $slugs  = [];
        foreach ($config['galleries'] as $id => $data) {
            if ($includeHidden || $data['public']) {
                $slugs[] = [
                    'id'    => $id,
                    'label' => $data['name'],
                    'new'   => $data['new'],
                ];
            }
        }
        return $slugs;
    }

    public function getGallery(string $slug)
    {
        $galleryList = $this->listGalleries(true);
        $slugs       = array_map(function($item) {
            return $item['id'];
        }, $galleryList);
        $config = $this->getConfig();
        $images = [];

        if (in_array($slug, $slugs)) {
            $dir    = $config['galleries'][$slug]['dir'];
            $images = array_map('basename', glob(sprintf(self::IMAGE_BASEDIR . "*.{jpg,jpeg,png}", $dir), GLOB_BRACE));
        }

        return [
            'name'   => $config['galleries'][$slug]['name'],
            'type'   => $config['galleries'][$slug]['type'],
            'images' => $images,
        ];
    }

    public function getImage(string $slug, string $image, $size = false): string
    {
        $config        = $this->getConfig();
        $galleryDir    = sprintf(self::IMAGE_BASEDIR, $config['galleries'][$slug]['dir']);
        $imageFileName = $size
            ? $this->getResizedImageName($galleryDir, $image, $size)
            : ( $galleryDir . $image );

        return $imageFileName;
    }

    protected function getResizedImageName($galleryDirectory, $imageName, $size): string
    {
        $numericSize = $size == 'thumb' ? self::THUMBNAIL_SIZE : $size;

        $thumbPath      = $galleryDirectory . "thumb_" . $numericSize;
        @mkdir($thumbPath);
        $thumbImageName = $thumbPath . "/" . $imageName;

        if (!file_exists($thumbImageName)) {
            $thumbSize = new Box($numericSize, $numericSize);
            $imagine   = new Imagine();
            $image     = $imagine->open($galleryDirectory . $imageName)
                ->thumbnail($thumbSize, ImageInterface::THUMBNAIL_OUTBOUND);
            $image->effects()->sharpen();
            $image->save($thumbImageName);
        }

        return $thumbImageName;
    }

    protected function getConfig()
    {
        if (null === $this->config) {
            $parser       = new Parser();
            $configReader = new Yaml([$parser, 'parse']);
            $this->config = $configReader->fromFile(self::CONFIG_FILE);
        }
        return $this->config;
    }
}