<?php

namespace Epages\Modules\Google;

use Bitrix\Main\Loader;
use Epages\Modules\Google\XmlNode;
use Epages\Modules\Google\Interfaces\FeedProfileInterface;

class GoogleProductXml
{

    private $mandatoryTags = [
        'title',
        'link',
        'price',
    ];

    private $profileSettings;

    public $productData;
    public $formattedData;

    public function __construct($productData, FeedProfileInterface $profileSettings)
    {
        $this->productData = $productData;
        $this->profileSettings = $profileSettings;
    }

    public function addProduct()
    {

        $xmlNode = new XmlNode();

        $product = [];

        $this->formatData($this->productData);

        if (!empty($this->formattedData)) {
            foreach ($this->formattedData as $tag => $value) {
                if (!empty($tag)) {
                    if (is_array($value)) {
                        foreach ($value as $valKey => $val) {
                            $product[$tag . '_' . $valKey] = $xmlNode->getNode($tag)->setValue($val);
                        }
                        unset($valKey, $val);
                    } else {
                        $product[$tag] = $xmlNode->getNode($tag)->setValue($value);
                    }
                }
            }
            unset($tag, $value);
        }

        if (!empty($product['item_group_id'])) {

            Loader::includeModule('iblock');

            $elementGroups = \CIBlockSection::GetNavChain(
                $this->profileSettings->getCatalogIblock(),
                strip_tags($product['item_group_id']),
                ['ID', 'IBLOCK_ID', 'NAME', 'DEPTH_LEVEL']
            );

            $countGroups = count($elementGroups) - 1;
            $productType = '';

            while ($elementGroup = $elementGroups->GetNext()) {
                $productType .= ($elementGroup['DEPTH_LEVEL'] > 1 ? ' > ' : '').$elementGroup['NAME'];
            }
            unset($key, $elementGroup);

            if (empty($productType)) {
                $elementGroupsQuery = \CIBlockSection::GetList(
                    [],
                    [
                        'IBLOCK_ID' => $this->profileSettings->getCatalogIblock(),
                        'ACTIVE' => 'Y',
                        'CHECK_PERMISSIONS' => 'N',
                        'ID' => strip_tags($product['item_group_id']),
                    ],
                    false,
                    ['ID', 'IBLOCK_ID', 'NAME']
                );

                if ($elementGroup = $elementGroupsQuery->GetNext()) {
                    $productType = $elementGroup['NAME'];
                }
                unset($key, $elementGroup);
            }
            if (!empty($productType)) {
                $product['product_type'] = $xmlNode->getNode('product_type')->setValue($productType);
            }
        }


        $result = '';

        if ($this->isValidProduct($product)) {
            foreach ($product as $tag) {
                $result .= $tag;
            }
        }

        return $result;
    }

    public function isValidProduct($product)
    {
        $valid = true;
        foreach ($this->mandatoryTags as $tag) {
            if (!array_key_exists($tag, $product) || empty($product[$tag])) {
                $valid = false;
            }
        }
        
        if ($valid === false && $this->profileSettings->getDebug()) {
            file_put_contents($_SERVER['DOCUMENT_ROOT'].'/local/lib/Lapa/Modules/Google/log/not_valid_products.log');
        }

        return $valid;
    }

    public function formatData()
    {
        $result = $this->productData;

        foreach ($this->productData as $tag => $value) {
            if (empty($value)) {
                unset($result[$tag]);
            }
        }

        $this->formattedData = $result;
    }
}