<?php

namespace KupShop\BonusProgramBundle\Actions;

use KupShop\AdminBundle\Admin\ProductsFilter;
use KupShop\KupShopBundle\Context\UserContext;
use KupShop\OrderDiscountBundle\Actions\AbstractAction;
use KupShop\OrderDiscountBundle\Entity\OrderDiscount;
use KupShop\OrderingBundle\Entity\Purchase\PurchaseState;
use KupShop\OrderingBundle\Util\Purchase\PurchaseUtil;

class BonusPointsAction extends AbstractAction
{
    protected static $type = 'bonus_points';
    protected static $position = 120;
    protected $adminTemplate = 'actions/bonus_points.tpl';
    protected $translationSection = 'bonus_program';

    /** @required */
    public PurchaseUtil $purchaseUtil;

    /**
     * @var UserContext
     */
    protected $userContext;

    public function __construct(UserContext $userContext)
    {
        $this->userContext = $userContext;
    }

    public function applyResult(PurchaseState &$purchaseState, OrderDiscount $orderDiscount, array $data)
    {
        // nemam modul
        if (!findModule(\Modules::BONUS_PROGRAM)) {
            return;
        }

        $this->messages = [];

        $extraPoints = $this->getExtraPoints($purchaseState, $data);

        // nasetuju extra body na PurchaseState
        if ($extraPoints->isPositive()) {
            if ($extra = $purchaseState->getCustomData('extra_bonus_points')) {
                $extraPoints = $extraPoints->add(toDecimal($extra));
            }
            $purchaseState->setCustomData(['extra_bonus_points' => $extraPoints->asInteger()]);
            // nemam uzivatele
            if (!$this->userContext->getActiveId()) {
                if ($message = $data['messages']['warning'] ?? '') {
                    $this->messages['warning'] = $message;
                }

                return;
            }
            $purchaseState->addUsedDiscount($orderDiscount->getId());
            if ($message = $data['messages']['success'] ?? '') {
                $this->messages['success'] = $message;
            }
        }
    }

    public function getPurchaseStateBonusPoints(PurchaseState $purchaseState, array $filter): \Decimal
    {
        $products = $this->purchaseUtil->getProductsApplicableByProductsFilter($purchaseState, $filter);

        $points = \DecimalConstants::zero();
        foreach ($products as $item) {
            if ($bonus_points = $item->bonus_points) {
                $points = $points->add($bonus_points);
            }
        }

        return $points;
    }

    public function checkValidity(&$data)
    {
        if (!empty($data['discount'])) {
            $data['discount'] = toDecimal($data['discount'])->asInteger();
            if ($data['discount']) {
                return true;
            }
        }
        if (!empty($data['coefficient'])) {
            $data['coefficient'] = toDecimal($data['coefficient'])->asFloat();
            if ($data['coefficient']) {
                return true;
            }
        }

        throw new \Exception($this->getName().' ['.$this->getType().'] - data is not valid.');
    }

    protected function getExtraPoints(PurchaseState $purchaseState, array $data): \Decimal
    {
        $extraPoints = \DecimalConstants::zero();

        // pridani statickeho poctu bodu
        if (!empty($data['discount'])) {
            $points = toDecimal($data['discount']);
            if ($points->isPositive()) {
                $extraPoints = $extraPoints->add($points);
            }
        }

        // pridani nasobku bodu
        if (!empty($data['coefficient'])) {
            $coefficient = toDecimal($data['coefficient']);
            if ($coefficient->asFloat() > 1) {
                // celkovy pocet bodu na produktech, ktere jsou aplikovatelne na produkt filter u akce
                $bonusPoints = $this->getPurchaseStateBonusPoints($purchaseState, $data['filter'] ?? []);
                $extraPoints = $extraPoints->add($bonusPoints->mul($coefficient)->sub($bonusPoints));
            }
        }

        return $extraPoints;
    }

    public function handleData($data)
    {
        $data = parent::handleData($data);
        $data['filter'] = ProductsFilter::cleanFilter($data['filter'] ?? []);

        return $data;
    }

    public function getDelayedExecution(): ?int
    {
        return 3;
    }
}