<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Support\Facades\Storage;

class IssueAttachment extends Model
{
    use HasFactory;

    protected $fillable = [
        'issue_id',
        'user_id',
        'file_name',
        'file_path',
        'file_size',
        'mime_type',
    ];

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

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

    public function getFileSizeHumanAttribute(): string
    {
        $bytes = $this->file_size;
        $units = ['B', 'KB', 'MB', 'GB'];

        for ($i = 0; $bytes > 1024 && $i < count($units) - 1; $i++) {
            $bytes /= 1024;
        }

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

    public function getDownloadUrlAttribute(): string
    {
        return route('admin.issues.attachments.download', $this);
    }

    protected static function boot()
    {
        parent::boot();

        static::deleting(function ($attachment) {
            // Delete file from storage when attachment record is deleted
            if (Storage::exists($attachment->file_path)) {
                Storage::delete($attachment->file_path);
            }
        });
    }
}