<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class AuditionEtude extends Model
{
    protected $fillable = [
        'instrument_id', 'auditioned_ensemble_id', 'set', 'original_filename', 'file_path', 'file_size',
    ];

    public function instrument(): BelongsTo
    {
        return $this->belongsTo(Instrument::class);
    }

    public function auditionedEnsemble(): BelongsTo
    {
        return $this->belongsTo(AuditionedEnsemble::class);
    }

    protected function humanReadableFileSize(): Attribute
    {
        return Attribute::make(
            get: function () {
                $bytes = $this->file_size;
                if ($bytes === null) {
                    return 'N/A';
                }

                $units = ['B', 'KB', 'MB', 'GB', 'TB'];
                $bytes = max($bytes, 0);
                $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
                $pow = min($pow, count($units) - 1);
                $bytes /= pow(1024, $pow);

                return round($bytes, 2).' '.$units[$pow];
            }
        );
    }
}