<?php

namespace BGM\BgmTheme\SignalSlot;

class HreflangTags
{

    /**
     * t3lib_page object for finding rootline on the fly
     *
     * @var \TYPO3\CMS\Frontend\Page\PageRepository
     */
    protected $sysPage;

    /**
     * @var array
     */
    protected $currentProduct;

    /**
     * @param \BGM\BgmHreflang\Utility\HreflangTags $parentObject
     */
    public function getGetParametersForProducts($parentObject)
    {
        $getParameters = $parentObject->getGetParameters();
        if (isset($getParameters['Product'])) {
            $this->getCurrentProduct($getParameters['Product']);
            $getParameters['Product'] = array_merge($getParameters['Product'], $this->getRelatedProduct($this->currentProduct, $parentObject->getRelatedPage(), (int)($getParameters['L'])));
            $parentObject->setGetParameters($getParameters);
        }
    }

    /**
     * Gets the full records for the current TreeGroup, Product and ProductVariant
     *
     * @param array $product
     * @return array $currentProduct
     */
    protected function getCurrentProduct($product)
    {
        if (!is_array($this->currentProduct)) {
            $currentProduct = [];
            if ((int)($product['treeGroup']) > 0) {
                $currentProduct['treeGroup'] = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('*', 'tx_products_domain_model_treegroup', 'uid=' . (int)($product['treeGroup']));
            }
            if ((int)($product['product']) > 0) {
                $currentProduct['product'] = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('*', 'tx_products_domain_model_product', 'uid=' . (int)($product['product']));
            }

            $this->currentProduct = $currentProduct;
        }
    }

    /**
     * Get the TreeGroup and Product in the related page for the current TreeGroup and Product
     *
     * @param array $currentProduct
     * @param int $relatedPage
     * @param int $sysLanguageUid
     * @return array $products
     */
    protected function getRelatedProduct($currentProduct, $relatedPage, $sysLanguageUid)
    {
        $products = [];
        $rootPageId = $this->getRootPageId($relatedPage);

        //We need the products sys_folder pid. in our project, we had this mapping already in the RealURL configuration, so we reuse it here
        $storagePageId = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['development.bgm.projects.localhost']['preVars'][0]['countryMapping'][(int)$rootPageId]['productStorage'];

        if (isset($currentProduct['treeGroup'])) {
            $treeGroup = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('uid', 'tx_products_domain_model_treegroup', 'ean LIKE ' . $GLOBALS['TYPO3_DB']->fullQuoteStr($currentProduct['treeGroup']['ean'], 'tx_products_domain_model_treegroup') . ' AND pid=' . (int)$storagePageId . ' AND sys_language_uid=' . (int)$sysLanguageUid . ' ' . $GLOBALS['TSFE']->sys_page->enableFields('tx_products_domain_model_treegroup'));

            $products['treeGroup'] = (int)($treeGroup['uid']);
        }

        if (isset($currentProduct['product'])) {
            $product = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('uid', 'tx_products_domain_model_product', 'ean LIKE ' . $GLOBALS['TYPO3_DB']->fullQuoteStr($currentProduct['product']['ean'], 'tx_products_domain_model_product') . ' AND pid=' . (int)$storagePageId . ' AND sys_language_uid=' . (int)$sysLanguageUid . ' ' . $GLOBALS['TSFE']->sys_page->enableFields('tx_products_domain_model_product'));

            $products['product'] = (int)($product['uid']);
        }

        return $products;
    }

    /**
     * @param int $pageId
     * @return int|mixed
     */
    protected function getRootPageId($pageId)
    {
        if (TYPO3_MODE == 'BE') {
            $rootline = \TYPO3\CMS\Backend\Utility\BackendUtility::BEgetRootLine($pageId);
        } else {
            $this->createSysPageIfNecessary();
            $rootline = $this->sysPage->getRootLine($pageId);
        }
        foreach ($rootline as $rootlinePage) {
            if ((int)($rootlinePage['is_siteroot']) == 1) {
                $rootPageId = $rootlinePage['uid'];
                break;
            }
        }

        return $rootPageId;
    }

    /**
     * Creates $this->sysPage if it does not exist yet.
     */
    protected function createSysPageIfNecessary()
    {
        if (!is_object($this->sysPage)) {
            $this->sysPage = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Frontend\\Page\\PageRepository');
            $this->sysPage->init($GLOBALS['TSFE']->showHiddenPage || $GLOBALS['TSFE']->beUserLogin);
        }
    }
}