<?php

namespace App\Observers;

use App\Models\Shipment;
use App\Models\SystemSetting;
use App\Notifications\ShipmentUpdatedNotification;
use App\Notifications\ShipmentApprovedSms;
use App\Notifications\ShipmentRejectedSms;
use Illuminate\Support\Facades\Config;

class ShipmentObserver
{
    public function updated(Shipment $shipment): void
    {
        $changes = $shipment->getChanges();
        $ignored = ['updated_at'];

        $changedFields = array_filter(
            array_keys($changes),
            fn ($key) => !in_array($key, $ignored)
        );

        if (empty($changedFields)) {
            return;
        }

        ShipmentUpdatedNotification::notify($shipment);

        $oldStatus = $shipment->getOriginal('status');
        $newStatus = $shipment->status;

        if ($oldStatus !== $newStatus) {
            $trackingUrl = url("/track/{$shipment->awb_no}");
            $smsEnabled = !empty(SystemSetting::get('kavenegar_api_key'));

            if ($smsEnabled && $newStatus === \App\Enums\ShipmentStatus::Approved && (bool) SystemSetting::get('kavenegar_send_shipment_approved', true)) {
                $shipment->user->notify(new ShipmentApprovedSms($shipment->awb_no, $trackingUrl));
            }

            if ($smsEnabled && $newStatus === \App\Enums\ShipmentStatus::Cancelled && (bool) SystemSetting::get('kavenegar_send_shipment_rejected', true)) {
                $shipment->user->notify(new ShipmentRejectedSms($shipment->awb_no, 'سفارش شما رد شد.'));
            }
        }
    }
}