<?php

declare(strict_types=1);

namespace App\BusProNet\Traits;

/**
 * Provides generic price-based sorting functionality for services and insurances.
 *
 * This trait implements consistent ascending price sorting across the application
 * for any objects that have a price property. Null prices are treated as zero,
 * ensuring items without pricing information appear first in sorted results.
 *
 * Usage:
 * - Services (skipasses, courses, rentals, board options, etc.)
 * - Insurances (individual and package insurances)
 *
 * Excluded from price sorting:
 * - Transportation services (sorted by subType)
 * - Pickup locations (no specific sorting)
 */
trait SortByPriceTrait
{
    /**
     * Sorts an array of objects by their price property in ascending order.
     *
     * This method provides a consistent sorting strategy across all price-based
     * collections in the application. Items are sorted from lowest to highest price,
     * with null prices being treated as zero (appearing first).
     *
     * @param array $items Array of objects with a price property to sort
     *
     * @return array The sorted array of objects (ascending by price)
     */
    protected function sortByPrice(array $items): array
    {
        usort($items, function (object $a, object $b) {
            $priceA = $a->price ?? 0;
            $priceB = $b->price ?? 0;

            return $priceA <=> $priceB;
        });

        return $items;
    }
}