<?php

namespace App\Models;

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

class ShipmentItem extends Model
{
    use HasFactory;

    protected $fillable = [
        'shipment_id',
        'order_id',
        'order_ctn',
        'order_qty',
        'order_ttl_qty',
        'order_ttl_amount',
        'order_ttl_kg',
    ];

    // ---------------------------
    // RELATIONSHIPS
    // ---------------------------

    public function shipment()
    {
        return $this->belongsTo(Shipment::class);
    }

    public function order()
    {
        return $this->belongsTo(Order::class);
    }

    // Helper: return order data with fallback to snapshot
    public function getDisplayQty()
    {
        return $this->order->qty ?? $this->order_qty;
    }

    public function getDisplayAmount()
    {
        return $this->order->ttl_amount ?? $this->order_ttl_amount;
    }
}
