<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class Activity extends Model
{
    protected $fillable = ['user_id','type','subject_type','subject_id','data'];
    protected $casts = ['data'=>'array'];

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

    public static function log(int $userId, string $type, mixed $subject = null, array $data = []): self
    {
        return static::create([
            'user_id'      => $userId,
            'type'         => $type,
            'subject_type' => $subject ? get_class($subject) : null,
            'subject_id'   => $subject?->id,
            'data'         => $data,
        ]);
    }
}