<?php

namespace Services\Podcasting;

use Services\Podcasting\Transcoder\Queue as TranscoderQueue;
use Illuminate\Support\Carbon;
use Illuminate\Contracts\Support\Jsonable;

class PodcastStatus implements Jsonable
{
    /**
     * Transcode Queue for Podcasts
     *
     * @var \Services\Podcasting\Transcoder\Queue
     */
    protected $queue;

    /**
     * The Podcast being checked
     *
     * @var App\Podcast
     */
    protected $podcast;

    /**
     * The Status of the Podcast
     *
     * @var string
     */
    protected $status;

    /**
     * If the Status is "pending" or "queued", the moment it may be start processing
     *
     * @var \Illuminate\Support\Carbon
     */
    protected $estimated_at;

    /**
     * Creates a new Podcasting instance
     *
     * @return void
     */
    public function __construct(TranscoderQueue $queue)
    {
        $this->queue = $queue;
    }

    /**
     * Get the processing status of a queued Podcast
     *
     * @return $this
     */
    public function getPodcastStatus(Podcast $podcast)
    {
        $this->podcast = $podcast;

        [$status, $estimated_at] = $this->queue->checkId($podcast->getKey());

        $this->status = $status;

        $this->estimated_at = $estimated_at ? Carbon::parse($estimated_at) : null;

        return $this;
    }

    /**
     * Convert the object to its JSON representation.
     *
     * @param  int  $options
     * @return string
     */
    public function toJson($options = 0)
    {
        return json_encode([
            'podcast_id' => $this->podcast->getKey(),
            'status' => $this->status ?? 'not_found',
            'estimated_at' => $this->estimated_at,
        ]);
}