<?php

namespace App\Commands;

use App\Album;
use App\Image;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Validator;

class EditAlbumCommand extends CommandBase
{
    private $_input;
    private $_albumId;
    private $_album;

    function __construct($trackId, $input)
    {
        $this->_input = $input;
        $this->_albumId = $trackId;
        $this->_album = Album::find($trackId);
    }

    /**
     * @return bool
     */
    public function authorize()
    {
        $user = Auth::user();

        return $this->_album && $user != null && $this->_album->user_id == $user->id;
    }

    /**
     * @throws \Exception
     * @return CommandResponse
     */
    public function execute()
    {
        $rules = [
            'title' => 'required|min:3|max:50',
            'cover' => 'image|mimes:png|min_width:350|min_height:350',
            'cover_id' => 'exists:images,id',
            'track_ids' => 'exists:tracks,id'
        ];

        $validator = Validator::make($this->_input, $rules);

        if ($validator->fails()) {
            return CommandResponse::fail($validator);
        }

        $this->_album->title = $this->_input['title'];
        $this->_album->description = $this->_input['description'];

        if (isset($this->_input['cover_id'])) {
            $this->_album->cover_id = $this->_input['cover_id'];
        } else {
            if (isset($this->_input['cover'])) {
                $cover = $this->_input['cover'];
                $this->_album->cover_id = Image::upload($cover, Auth::user())->id;
            } else {
                if (isset($this->_input['remove_cover']) && $this->_input['remove_cover'] == 'true') {
                    $this->_album->cover_id = null;
                }
            }
        }

        $trackIds = explode(',', $this->_input['track_ids']);
        $this->_album->syncTrackIds($trackIds);
        $this->_album->save();

        Album::whereId($this->_album->id)->update([
            'track_count' => DB::raw('(SELECT COUNT(id) FROM tracks WHERE album_id = ' . $this->_album->id . ')')
        ]);

        return CommandResponse::succeed(['real_cover_url' => $this->_album->getCoverUrl(Image::NORMAL)]);
    }
}