<?php

namespace App\Services;

use Cache;
use Illuminate\Support\Facades\Redis;
use App\Media;
use App\Status;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;
use League\Fractal\Pagination\IlluminatePaginatorAdapter;
use App\Transformer\Api\MediaTransformer;
use App\Util\Media\License;

class MediaService
{
	const CACHE_KEY = 'status:transformer:media:attachments:';

	public static function get($statusId)
	{
		return Cache::remember(self::CACHE_KEY.$statusId, 21600, function() use($statusId) {
			$media = Media::whereStatusId($statusId)->orderBy('order')->get();
			if(!$media) {
				return [];
			}
			$fractal = new Fractal\Manager();
			$fractal->setSerializer(new ArraySerializer());
			$resource = new Fractal\Resource\Collection($media, new MediaTransformer());
			return $fractal->createData($resource)->toArray();
		});
	}

	public static function getMastodon($id)
	{
		$media = self::get($id);
		if(!$media) {
			return [];
		}
		$medias = collect($media)
		->map(function($media) {
			$mime = $media['mime'] ? explode('/', $media['mime']) : false;
			unset(
				$media['optimized_url'],
				$media['license'],
				$media['is_nsfw'],
				$media['orientation'],
				$media['filter_name'],
				$media['filter_class'],
				$media['mime'],
				$media['hls_manifest']
			);

			$media['type'] = $mime ? strtolower($mime[0]) : 'unknown';
			return $media;
		})
		->filter(function($m) {
			return $m && isset($m['url']);
		})
		->values();

		return $medias->toArray();
	}

	public static function del($statusId)
	{
		return Cache::forget(self::CACHE_KEY . $statusId);
	}

	public static function activitypub($statusId)
	{
		$status = self::get($statusId);
		if(!$status) {
			return [];
		}

		return collect($status)->map(function($s) {
			$license = isset($s['license']) && $s['license']['title'] ? $s['license']['title'] : null;
			return [
				'type'      => 'Document',
				'mediaType' => $s['mime'],
				'url'       => $s['url'],
				'name'      => $s['description'],
				'summary'   => $s['description'],
				'blurhash'  => $s['blurhash'],
				'license'   => $license
			];
		});
	}
}