<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class SubmissionDocument extends Model
{
    use HasFactory;

    protected $fillable = [
        'submission_id',
        'original_filename',
        'stored_path',
        'file_hash',
        'mime_type',
        'size',
        'version',
        'is_active',
        'uploaded_by',
    ];

    protected function casts(): array
    {
        return [
            'is_active' => 'boolean',
            'size' => 'integer',
            'version' => 'integer',
        ];
    }

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

    public function uploadedBy(): BelongsTo
    {
        return $this->belongsTo(User::class, 'uploaded_by');
    }

    public function humanSize(): string
    {
        $bytes = (int) $this->size;
        if ($bytes >= 1048576) {
            return round($bytes / 1048576, 2).' MB';
        }
        if ($bytes >= 1024) {
            return round($bytes / 1024, 2).' KB';
        }

        return $bytes.' B';
    }
}