<?php
/**
* 2010-2018 Webkul.
*
* NOTICE OF LICENSE
*
* All right is reserved,
* Please go through this link for complete license : https://store.webkul.com/license.html
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade this module to newer
* versions in the future. If you wish to customize this module for your
* needs please refer to https://store.webkul.com/customisation-guidelines/ for more information.
*
*  @author    Webkul IN <support@webkul.com>
*  @copyright 2010-2018 Webkul IN
*  @license   https://store.webkul.com/license.html
*/

class CheckoutProcessCore
{
    public $steps = array();

    public function handleRequest()
    {
        foreach ($this->steps as $step) {
            $step->handleRequest();
        }
        return $this;
    }

    public function addStep(CheckoutStepInterface $step)
    {
        $step->setCheckoutProcess($this);
        $this->steps[] = $step;
        return $this;
    }

    public function getSteps()
    {
        return $this->steps;
    }

    public function setNextStepReachable()
    {
        foreach ($this->getSteps() as $step) {
            if (!$step->isReachable()) {
                $step->setReachable(true);
                break;
            }
            if (!$step->isComplete()) {
                break;
            }
        }

        return $this;
    }

    public function markCurrentStep()
    {
        $steps = $this->getSteps();

        foreach ($steps as $step) {
            if ($step->isCurrent()) {
                // If a step marked itself as current
                // then we assume it has a good reason
                // to do so and we don't auto-advance.
                return $this;
            }
        }

        foreach ($steps as $position => $step) {
            $nextStep = ($position < count($steps) - 1) ? $steps[$position + 1] : null;

            if ($step->isReachable() && (!$step->isComplete() || ($nextStep && !$nextStep->isReachable()))) {
                $step->setCurrent(true);

                return $this;
            }
        }

        return $this;
    }

    public function invalidateAllStepsAfterCurrent()
    {
        $markAsUnreachable = false;
        foreach ($this->getSteps() as $step) {
            if ($markAsUnreachable) {
                $step->setComplete(false)->setReachable(false);
            }

            if ($step->isCurrent()) {
                $markAsUnreachable = true;
            }
        }

        return $this;
    }

    // if any event occurred which is changing cart/address/payment/customer then reset cehckout cookies
    public static function refreshCheckoutProcess()
    {
        $context = Context::getContext();
        $context->cookie->__set('cart_summary_proceeded', 0);
        $context->cookie->__set('customer_details_proceeded', 0);
    }
}