<?php

namespace App\Komma\Shop\Cart;

trait HasCouponCodesTrait
{
    /** @var string[] */
    private $couponCodes = [];

    /**
     * Adds a coupon code. Notice that this does not mean that it is valid.
     * Validation is done via the DiscountServiceInterface
     *
     * @param string $code
     * @return mixed
     */
    public function addCouponCode(string $code): bool
    {
        if (! in_array($code, $this->couponCodes)) {
            $this->couponCodes[] = $code;

            return true;
        }

        return false;
    }

    /**
     * Removes a coupon code and returns true if it was removed and false if not.
     *
     * @param string $code
     * @return bool
     */
    public function removeCouponCode(string $code): bool
    {
        $foundIndex = false;
        foreach ($this->couponCodes as $index => $couponCode) {
            if ($code == $couponCode) {
                $foundIndex = $index;
                break;
            }
        }

        if ($foundIndex) {
            array_splice($this->couponCodes, $foundIndex, 1);

            return true;
        }

        return false;
    }

    /**
     * Return all coupon codes;
     *
     * @return string[];
     */
    public function getCouponCodes(): array
    {
        return $this->couponCodes;
    }
}