<?php

use Wpae\App\Service\ExportGoogleMerchantsFactory;

final Class XmlCsvExport
{
    public static $main_xml_tag = '';

    public static $node_xml_tag = '';

    /** @var  \Wpae\Csv\CsvWriter */
    public static $csvWriter;

    public static function export()
    {
        switch (XmlExportEngine::$exportOptions['export_to']) {
            case XmlExportEngine::EXPORT_TYPE_XML:

                if (XmlExportEngine::$exportOptions['xml_template_type'] == XmlExportEngine::EXPORT_TYPE_GOOLE_MERCHANTS) {
                    $exportGoogleMerchantsFactory = new ExportGoogleMerchantsFactory();
                    $exportGoogleMerchants = $exportGoogleMerchantsFactory->createService();
                    $exportGoogleMerchants->export(false, '', XmlExportEngine::$exportRecord->exported);
                } else {
                    self::export_xml();
                }
                break;

            case XmlExportEngine::EXPORT_TYPE_CSV:
                self::export_csv();
                break;
            default:
                # code...
                break;
        }
    }

    public static function export_csv($preview = false, $is_cron = false, $file_path = false, $exported_by_cron = 0)
    {

        if (XmlExportEngine::$exportOptions['delimiter'] == '\t') XmlExportEngine::$exportOptions['delimiter'] = "\t";

        ob_start();

        $stream = fopen("php://output", 'w');

        $headers = array();
        $woo = array();
        $woo_order = array();
        $acfs = array();
        $articles = array();

        // [ Exporting requested data ]

        if (XmlExportEngine::$is_user_export) { // exporting WordPress users

            foreach (XmlExportEngine::$exportQuery->results as $user) {
                $articles[] = XmlExportUser::prepare_data($user, XmlExportEngine::$exportOptions, false, $acfs, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $user->ID, XmlExportEngine::$exportRecord);
            }
        }
        elseif ( XmlExportEngine::$is_woo_customer_export )  { // exporting WooCommerce Customers

            foreach ( XmlExportEngine::$exportQuery->results as $customer ) {
                $articles[] = XmlExportWooCommerceCustomer::prepare_data($customer, XmlExportEngine::$exportOptions, false, $acfs, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $customer->ID, XmlExportEngine::$exportRecord);
            }
        }
        elseif (XmlExportEngine::$is_comment_export) {  // exporting comments
            global $wp_version;

            if (version_compare($wp_version, '4.2.0', '>=')) {
                $comments = XmlExportEngine::$exportQuery->get_comments();
            } else {
                $comments = XmlExportEngine::$exportQuery;
            }

            foreach ($comments as $comment) {
                $articles[] = XmlExportComment::prepare_data($comment, XmlExportEngine::$exportOptions, false, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $comment->comment_ID, XmlExportEngine::$exportRecord);
            }
        }
        elseif (XmlExportEngine::$is_woo_review_export) {  // exporting comments
            global $wp_version;

            if (version_compare($wp_version, '4.2.0', '>=')) {
                $comments = XmlExportEngine::$exportQuery->get_comments();
            } else {
                $comments = XmlExportEngine::$exportQuery;
            }

            foreach ($comments as $comment) {
                $articles[] = XmlExportWooCommerceReview::prepare_data($comment, XmlExportEngine::$exportOptions, false, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $comment->comment_ID, XmlExportEngine::$exportRecord);
            }
        }
        elseif (XmlExportEngine::$is_taxonomy_export) { // exporting WordPress taxonomy terms

            add_filter('terms_clauses', 'wp_all_export_terms_clauses', 10, 3);
            $terms = XmlExportEngine::$exportQuery->get_terms();
            remove_filter('terms_clauses', 'wp_all_export_terms_clauses');
            foreach ($terms as $term) {
                $articles[] = XmlExportTaxonomy::prepare_data($term, XmlExportEngine::$exportOptions, false, $acfs, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $term->term_id, XmlExportEngine::$exportRecord);
            }
        } else { // exporting custom post types

            // Get custom field snippets
            $snippets = array();
            $exportOptions = XmlExportEngine::$exportOptions;
            $snippetParser = new \Wpae\App\Service\SnippetParser();
            $wpaeString = new WpaeString();

            if (
                (XmlExportEngine::$exportOptions['export_to'] == XmlExportEngine::EXPORT_TYPE_CSV) &&
                isset(XmlExportEngine::$exportOptions['ids']) &&
                is_array(XmlExportEngine::$exportOptions['ids'])
            ) {

                $snippets = array();
                foreach (XmlExportEngine::$exportOptions['ids'] as $ID => $value) {
                    if (isset($exportOptions['cc_combine_multiple_fields'][$ID])
                        && $exportOptions['cc_combine_multiple_fields'][$ID]) {
                        $combineMultipleFieldsValue = $exportOptions['cc_combine_multiple_fields_value'][$ID];
                        $combineMultipleFieldsValue = stripslashes($combineMultipleFieldsValue);
                        $parsedSnippets = $snippetParser->parseSnippets($combineMultipleFieldsValue);
                        foreach ($parsedSnippets as $v) {
                            if (!in_array($v, $snippets))
                                $snippets[] = $v;
                        }
                    }
                }

                $engine = new XmlExportEngine(XmlExportEngine::$exportOptions);
                $engine->init_available_data();
                $engine->init_additional_data();
                $finalSnippets = $engine->get_fields_options($snippets);

            }

            if (!empty($finalSnippets)) {
                foreach ($finalSnippets as $key => $val) {
                    foreach ($val as $k => $v)
                        $exportOptions[$key][] = $v;
                }
            }

            // End get custom field snippets

            while (XmlExportEngine::$exportQuery->have_posts()) {

                XmlExportEngine::$exportQuery->the_post();

                $record = get_post(get_the_ID());
                $articles[] = XmlExportCpt::prepare_data($record, $exportOptions, false, $acfs, $woo, $woo_order, XmlExportEngine::$implode, $preview);
                $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);
                if (!$preview) do_action('pmxe_exported_post', $record->ID, XmlExportEngine::$exportRecord);
            }

            if (isset($exportOptions['cc_combine_multiple_fields']) && is_array($exportOptions['cc_combine_multiple_fields'])) {
                foreach ($exportOptions['cc_combine_multiple_fields'] as $ID => $value) {
                    if ($value) {
                        $label = $exportOptions['cc_name'][$ID];
                        foreach ($articles as $key => $article) {
                            $multipleFieldsValue = $exportOptions['cc_combine_multiple_fields_value'][$ID];

                            foreach ($article as $snippetName => $articleValue) {

                                if($wpaeString->isBetween($multipleFieldsValue, "{".$snippetName."}", '[',']')) {
                                    // Replace snippets in functions
                                    $multipleFieldsValue = str_replace("{" . $snippetName . "}", '$articleData**OPENARR**"'.$snippetName.'"**CLOSEARR**', $multipleFieldsValue);
                                } else {
                                    // Replace snippets not in functions
                                    $multipleFieldsValue = str_replace("{" . $snippetName . "}", $articleValue, $multipleFieldsValue);
                                }
                            }

                            $multipleFieldsValue = html_entity_decode($multipleFieldsValue);
                            $functions = $snippetParser->parseFunctions($multipleFieldsValue);

                            $multipleFieldsValue = \Wpae\App\Service\CombineFields::prepareMultipleFieldsValue($functions, $multipleFieldsValue, $article);

                            $articles[$key][$label] = $multipleFieldsValue;
                        }
                    }
                }
            }


            wp_reset_postdata();
        }
        // [ \Exporting requested data ]

        // [ Prepare CSV headers ]
        if (XmlExportEngine::$exportOptions['ids']):

            foreach (XmlExportEngine::$exportOptions['ids'] as $ID => $value) {
                if (empty(XmlExportEngine::$exportOptions['cc_name'][$ID]) or empty(XmlExportEngine::$exportOptions['cc_type'][$ID]) or !is_numeric($ID)) continue;

                self::prepare_csv_headers($headers, $ID, $acfs);
            }

        endif;

        $headers = apply_filters('wp_all_export_csv_headers', $headers, XmlExportEngine::$exportID);

        if ($is_cron) {
            if (!$exported_by_cron) {
                self::getCsvWriter()->writeCsv($stream, array_map(array('XmlCsvExport', '_get_valid_header_name'), $headers), XmlExportEngine::$exportOptions['delimiter']);
                apply_filters('wp_all_export_after_csv_line', $stream, XmlExportEngine::$exportID);
            } else {
                self::merge_headers($file_path, $headers);
            }
        } else {
            if ($preview or empty(PMXE_Plugin::$session->file)) {
                self::getCsvWriter()->writeCsv($stream, array_map(array('XmlCsvExport', '_get_valid_header_name'), $headers), XmlExportEngine::$exportOptions['delimiter']);
                apply_filters('wp_all_export_after_csv_line', $stream, XmlExportEngine::$exportID);
            } else {
                self::merge_headers(PMXE_Plugin::$session->file, $headers);
            }
        }

        // [ \Prepare CSV headers ]
        if (!empty($articles)) {
            foreach ($articles as $article) {
                if (empty($article)) continue;
                $line = array();
                foreach ($headers as $header) {
                    $line[$header] = (isset($article[$header])) ? $article[$header] : '';
                }
                self::getCsvWriter()->writeCsv($stream, $line, XmlExportEngine::$exportOptions['delimiter']);
                apply_filters('wp_all_export_after_csv_line', $stream, XmlExportEngine::$exportID);
            }
        }

        if ($preview) return ob_get_clean();

        return self::save_csv_to_file($file_path, $is_cron, $exported_by_cron);

    }

    public static function export_xml($preview = false, $is_cron = false, $file_path = false, $exported_by_cron = 0)
    {
        $is_custom_xml = (!empty(XmlExportEngine::$exportOptions['xml_template_type']) && in_array(XmlExportEngine::$exportOptions['xml_template_type'], array('custom', 'XmlGoogleMerchants'))) ? true : false;

        if (!empty(XmlExportEngine::$exportOptions['xml_template_type'])) {

            switch (XmlExportEngine::$exportOptions['xml_template_type']) {
                case 'custom':
                case 'XmlGoogleMerchants':
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['ids'])) {
                        XmlExportEngine::$exportOptions['ids'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['ids'];
                    }

                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_label'])) {
                        XmlExportEngine::$exportOptions['cc_label'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_label'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_type'])) {
                        XmlExportEngine::$exportOptions['cc_type'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_type'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_value'])) {
                        XmlExportEngine::$exportOptions['cc_value'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_value'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_name'])) {
                        XmlExportEngine::$exportOptions['cc_name'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_name'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_php'])) {
                        XmlExportEngine::$exportOptions['cc_php'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_php'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_code'])) {
                        XmlExportEngine::$exportOptions['cc_code'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_code'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_sql'])) {
                        XmlExportEngine::$exportOptions['cc_sql'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_sql'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_options'])) {
                        XmlExportEngine::$exportOptions['cc_options'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_options'];
                    }
                    if (isset(XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_settings'])) {
                        XmlExportEngine::$exportOptions['cc_settings'] = XmlExportEngine::$exportOptions['custom_xml_template_options']['cc_settings'];
                    }
                    break;
                default:
                    # code...
                    break;
            }
        }

        if (XmlExportEngine::$exportOptions['delimiter'] == '\t') XmlExportEngine::$exportOptions['delimiter'] = "\t";

        require_once PMXE_ROOT_DIR . '/classes/XMLWriter.php';

        $woo = array();
        $woo_order = array();
        $acfs = array();

        self::$main_xml_tag = apply_filters('wp_all_export_main_xml_tag', XmlExportEngine::$exportOptions['main_xml_tag'], XmlExportEngine::$exportID);
        self::$node_xml_tag = apply_filters('wp_all_export_record_xml_tag', XmlExportEngine::$exportOptions['record_xml_tag'], XmlExportEngine::$exportID);

//        self::$implode = (XmlExportEngine::$exportOptions['delimiter'] == ',') ? '|' : ',';
//
//        if ( $is_custom_xml ) self::$implode = '#delimiter#';

        $xmlWriter = new PMXE_XMLWriter();

        if (!$is_custom_xml) {

            $xmlWriter->openMemory();
            $xmlWriter->setIndent(true);
            $xmlWriter->setIndentString("\t");
            $xmlWriter->startDocument('1.0', XmlExportEngine::$exportOptions['encoding']);
            $xmlWriter->startElement(self::$main_xml_tag);
            // add additional data after XML root element
            self::xml_header($xmlWriter, $is_cron, $exported_by_cron);
        }

        // [ Exporting requested data ]

        if (XmlExportEngine::$is_user_export) // exporting WordPress users
        {
            foreach (XmlExportEngine::$exportQuery->results as $user) :

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $user, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $user->ID);

                    $xmlWriter->startElement(self::$node_xml_tag);

                    XmlExportUser::prepare_data($user, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $user->ID);
                } else {
                    $articles = array();
                    $articles[] = XmlExportUser::prepare_data($user, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $user->ID, XmlExportEngine::$exportRecord);

            endforeach;

        }
        if (XmlExportEngine::$is_woo_customer_export) // exporting WordPress users
        {
            foreach (XmlExportEngine::$exportQuery->results as $customer) :

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $customer, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $customer->ID);

                    $xmlWriter->startElement(self::$node_xml_tag);

                    XmlExportWooCommerceCustomer::prepare_data($customer, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $customer->ID);
                } else {
                    $articles = array();
                    $articles[] = XmlExportUser::prepare_data($customer, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $customer->ID, XmlExportEngine::$exportRecord);

            endforeach;

        }
        elseif (XmlExportEngine::$is_taxonomy_export) // exporting WordPress taxonomy terms
        {
            add_filter('terms_clauses', 'wp_all_export_terms_clauses', 10, 3);
            $terms = XmlExportEngine::$exportQuery->get_terms();
            remove_filter('terms_clauses', 'wp_all_export_terms_clauses');
            foreach ($terms as $term) {

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $term, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $term->term_id);

                    $xmlWriter->startElement(self::$node_xml_tag);

                    XmlExportTaxonomy::prepare_data($term, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $term->term_id);
                } else {
                    $articles = array();
                    $articles[] = XmlExportTaxonomy::prepare_data($term, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $term->term_id, XmlExportEngine::$exportRecord);

            }

        }
        elseif (XmlExportEngine::$is_comment_export) // exporting comments
        {
            global $wp_version;

            if (version_compare($wp_version, '4.2.0', '>=')) {
                $comments = XmlExportEngine::$exportQuery->get_comments();
            } else {
                $comments = XmlExportEngine::$exportQuery;
            }

            foreach ($comments as $comment) {

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $comment, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $comment->comment_ID);

                    $xmlWriter->startElement(self::$node_xml_tag);

                    XmlExportComment::prepare_data($comment, XmlExportEngine::$exportOptions, $xmlWriter, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $comment->comment_ID);
                } else {
                    $articles = array();
                    $articles[] = XmlExportComment::prepare_data($comment, XmlExportEngine::$exportOptions, $xmlWriter, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $comment->comment_ID, XmlExportEngine::$exportRecord);

            }
        }
        elseif (XmlExportEngine::$is_woo_review_export) // exporting comments
        {
            global $wp_version;

            if (version_compare($wp_version, '4.2.0', '>=')) {
                $reviews = XmlExportEngine::$exportQuery->get_comments();
            } else {
                $reviews = XmlExportEngine::$exportQuery;
            }

            foreach ($reviews as $review) {

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $review, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $review->comment_ID);

                    $xmlWriter->startElement(self::$node_xml_tag);

                    XmlExportWooCommerceReview::prepare_data($review, XmlExportEngine::$exportOptions, $xmlWriter, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $review->comment_ID);
                } else {
                    $articles = array();
                    $articles[] = XmlExportWooCommerceReview::prepare_data($review, XmlExportEngine::$exportOptions, $xmlWriter, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $review->comment_ID, XmlExportEngine::$exportRecord);

            }
        }
        else {// exporting custom post types
            while (XmlExportEngine::$exportQuery->have_posts()) {
                XmlExportEngine::$exportQuery->the_post();
                $record = get_post(get_the_ID());

                $is_export_record = apply_filters('wp_all_export_xml_rows', true, $record, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!$is_export_record) continue;

                if (!$is_custom_xml) {
                    // add additional information before each node
                    self::before_xml_node($xmlWriter, $record->ID);
                    $xmlWriter->startElement(self::$node_xml_tag);
                    XmlExportCpt::prepare_data($record, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, $woo, $woo_order, XmlExportEngine::$implode, $preview);

                    $xmlWriter->closeElement(); // end post

                    // add additional information after each node
                    self::after_xml_node($xmlWriter, $record->ID);
                } else {
                    $articles = array();
                    $articles[] = XmlExportCpt::prepare_data($record, XmlExportEngine::$exportOptions, $xmlWriter, $acfs, $woo, $woo_order, XmlExportEngine::$implode, $preview);
                    $articles = apply_filters('wp_all_export_csv_rows', $articles, XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                    $xmlWriter->writeArticle($articles);
                }

                if (!$preview) do_action('pmxe_exported_post', $record->ID, XmlExportEngine::$exportRecord);
            }
            wp_reset_postdata();
        }
        // [ \Exporting requested data ]

        if (!$is_custom_xml) $xmlWriter->closeElement(); // close root XML element

        if ($preview) {
            return $xmlWriter->wpae_flush();
        }

        return self::save_xml_to_file($xmlWriter, $file_path, $is_cron, $exported_by_cron);

    }

    // [ XML Export Helpers ]
    private static function xml_header($xmlWriter, $is_cron, $exported_by_cron)
    {
        if ($is_cron) {
            if (!$exported_by_cron) {

                $additional_data = apply_filters('wp_all_export_additional_data', array(), XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!empty($additional_data)) {
                    foreach ($additional_data as $key => $value) {
                        self::addElement($xmlWriter, $key, $value);
                    }
                }
            }
        } else {

            if (empty(PMXE_Plugin::$session->file)) {

                $additional_data = apply_filters('wp_all_export_additional_data', array(), XmlExportEngine::$exportOptions, XmlExportEngine::$exportID);

                if (!empty($additional_data)) {
                    foreach ($additional_data as $key => $value) {
                        self::addElement($xmlWriter, $key, $value);
                    }
                }
            }
        }
    }

    private static function before_xml_node($xmlWriter, $pid)
    {
        $add_before_node = apply_filters('wp_all_export_add_before_node', array(), XmlExportEngine::$exportOptions, XmlExportEngine::$exportID, $pid);

        if (!empty($add_before_node)) {
            foreach ($add_before_node as $key => $value) {
                self::addElement($xmlWriter, $key, $value);
            }
        }
    }

    private static function after_xml_node($xmlWriter, $pid)
    {
        $add_after_node = apply_filters('wp_all_export_add_after_node', array(), XmlExportEngine::$exportOptions, XmlExportEngine::$exportID, $pid);

        if (!empty($add_after_node)) {
            foreach ($add_after_node as $key => $value) {
                self::addElement($xmlWriter, $key, $value);
            }
        }
    }

    private static function save_xml_to_file($xmlWriter, $file_path, $is_cron, $exported_by_cron)
    {
        $is_custom_xml = in_array(XmlExportEngine::$exportOptions['xml_template_type'], array('custom', 'XmlGoogleMerchants'));

        if ($is_cron) {
            if (!$is_custom_xml) {
                $xml_header = apply_filters('wp_all_export_xml_header', '<?xml version="1.0" encoding="UTF-8"?>', XmlExportEngine::$exportID);

                $xml = str_replace('<?xml version="1.0" encoding="UTF-8"?>', $xml_header, $xmlWriter->wpae_flush());
            } else {
                $xml_header = XmlExportEngine::$exportOptions['custom_xml_template_header'];

                $xml = (!$exported_by_cron) ? PMXE_XMLWriter::preprocess_xml($xml_header) . $xmlWriter->wpae_flush() : $xmlWriter->wpae_flush();
            }

            if (!$exported_by_cron) {
                if (!$is_custom_xml) $xml = substr($xml, 0, (strlen(self::$main_xml_tag) + 4) * (-1));

                // The BOM will help some programs like Microsoft Excel read your export file if it includes non-English characters.
                if (XmlExportEngine::$exportOptions['include_bom']) {
                    file_put_contents($file_path, chr(0xEF) . chr(0xBB) . chr(0xBF) . $xml);
                } else {
                    file_put_contents($file_path, $xml);
                }
            } else {
                $xml = (!$is_custom_xml) ? substr(substr($xml, 41 + strlen(self::$main_xml_tag)), 0, (strlen(self::$main_xml_tag) + 4) * (-1)) : $xml;
                file_put_contents($file_path, $xml, FILE_APPEND);
            }

            return $file_path;

        } else {

            if (empty(PMXE_Plugin::$session->file)) {

                // generate export file name
                $export_file = wp_all_export_generate_export_file(XmlExportEngine::$exportID);

                if (!$is_custom_xml) {
                    $xml_header = apply_filters('wp_all_export_xml_header', '<?xml version="1.0" encoding="UTF-8"?>', XmlExportEngine::$exportID);

                    $xml = str_replace('<?xml version="1.0" encoding="UTF-8"?>', $xml_header, $xmlWriter->wpae_flush());
                } else {
                    $xml_header = XmlExportEngine::$exportOptions['custom_xml_template_header'];

                    $xml = PMXE_XMLWriter::preprocess_xml($xml_header) . $xmlWriter->wpae_flush();
                }

                if (!$is_custom_xml) $xml = substr($xml, 0, (strlen(self::$main_xml_tag) + 4) * (-1));

                // The BOM will help some programs like Microsoft Excel read your export file if it includes non-English characters.
                if (XmlExportEngine::$exportOptions['include_bom']) {
                    file_put_contents($export_file, chr(0xEF) . chr(0xBB) . chr(0xBF) . $xml);
                } else {
                    file_put_contents($export_file, $xml);
                }

                PMXE_Plugin::$session->set('file', $export_file);
                PMXE_Plugin::$session->save_data();

            } else {
                $xml = (!$is_custom_xml) ? substr(substr($xmlWriter->wpae_flush(), 41 + strlen(self::$main_xml_tag)), 0, (strlen(self::$main_xml_tag) + 4) * (-1)) : $xmlWriter->wpae_flush();

                file_put_contents(PMXE_Plugin::$session->file, $xml, FILE_APPEND);
            }

            return true;

        }
    }
    // [ \XML Export Helpers ]

    // [ CSV Export Helpers ]
    public static function prepare_csv_headers(& $headers, $ID, &$acfs)
    {
        $element_name = (!empty(XmlExportEngine::$exportOptions['cc_name'][$ID])) ? XmlExportEngine::$exportOptions['cc_name'][$ID] : 'untitled_' . $ID;
        $element_name = apply_filters('wp_all_export_field_name', wp_all_export_parse_field_name($element_name), XmlExportEngine::$exportID);

        if (strpos(XmlExportEngine::$exportOptions['cc_label'][$ID], "item_data__") !== false) {
            XmlExportEngine::$woo_order_export->get_element_header($headers, XmlExportEngine::$exportOptions, $ID);
            return;
        }

        switch (XmlExportEngine::$exportOptions['cc_type'][$ID]) {
            case 'woo':
                XmlExportEngine::$woo_export->get_element_header($headers, XmlExportEngine::$exportOptions, $ID);
                break;

            case 'woo_order':
                XmlExportEngine::$woo_order_export->get_element_header($headers, XmlExportEngine::$exportOptions, $ID);
                break;

            case 'acf':
                if (!empty($acfs)) {
                    $single_acf_field = array_shift($acfs);

                    if (is_array($single_acf_field)) {
                        foreach ($single_acf_field as $acf_header) {
                            if (!in_array($acf_header, $headers)) $headers[] = $acf_header;
                        }
                    } else {
                        if (!in_array($single_acf_field, $headers)) $headers[] = $single_acf_field;
                    }
                }
                break;

            default:

                // For ID columns make first element in lowercase for Excel export
                if ($element_name == 'ID' && !$ID && isset(XmlExportEngine::$exportOptions['export_to_sheet']) && XmlExportEngine::$exportOptions['export_to_sheet'] != 'csv') {
                    $element_name = 'id';
                }

                if (!in_array($element_name, $headers)) {
                    $headers[] = $element_name;
                } else {
                    $is_added = false;
                    $i = 0;
                    do {
                        $new_element_name = $element_name . '_' . md5($i);

                        if (!in_array($new_element_name, $headers)) {
                            $headers[] = $new_element_name;
                            $is_added = true;
                        }

                        $i++;
                    } while (!$is_added);
                }

//				if ( XmlExportEngine::$exportOptions['cc_label'][$ID] == 'product_type' and ! in_array('parent_id', $headers)) {
//					$headers[] = 'parent_id';
//				}

                break;
        }

    }

    public static function _get_valid_header_name($element_name)
    {
        $element_name_parts = explode("_", $element_name);

        $elementIndex = array_pop($element_name_parts);

        if (wp_all_export_isValidMd5($elementIndex)) {
            $element_name_in_file = str_replace("_" . $elementIndex, "", $element_name);
        } else {
            $element_name_in_file = $element_name;
        }

        $element_name_in_file = XmlExportEngine::sanitizeFieldName($element_name_in_file);

        return $element_name_in_file;
    }


    // Add missing ACF headers
    public static function merge_headers($file, &$headers)
    {

        $in = fopen($file, 'r');

        $clear_old_headers = fgetcsv($in, 0, XmlExportEngine::$exportOptions['delimiter']);

        fclose($in);

        $old_headers = array();
        $sanitized_headers = array();
        $urldecoded_sanitized_headers = array();

        foreach ($headers as $header) {
            $sanitizedHeaderValue = str_replace("'", "", str_replace('"', "", str_replace(chr(0xEF) . chr(0xBB) . chr(0xBF), "", $header)));
            $sanitized_headers[] = $sanitizedHeaderValue;
            $urldecoded_sanitized_headers[] = urldecode($sanitizedHeaderValue);

        }
        foreach ($clear_old_headers as $i => $header) {
            $header = str_replace("'", "", str_replace('"', "", str_replace(chr(0xEF) . chr(0xBB) . chr(0xBF), "", $header)));

            if (!in_array($header, $old_headers)) {
                $old_headers[] = $header;
            } else {
                $is_added = false;
                $i = 0;
                do {
                    $new_element_name = $header . '_' . md5($i);

                    if (!in_array($new_element_name, $old_headers)) {
                        $old_headers[] = str_replace("'", "", str_replace('"', "", str_replace(chr(0xEF) . chr(0xBB) . chr(0xBF), "", $new_element_name)));
                        $is_added = true;
                    }

                    $i++;
                } while (!$is_added);
            }
        }

        $is_update_headers = false;

        foreach ($sanitized_headers as $key => $header) {
            if (!in_array(XmlExportEngine::sanitizeFieldName($header), $old_headers) || XmlExportEngine::sanitizeFieldName($header) != $old_headers[$key]) {
                $is_update_headers = true;
                break;
            }
        }

        foreach ($old_headers as $key => $old_header) {
            if (!in_array(XmlExportEngine::sanitizeFieldName($old_header), $urldecoded_sanitized_headers) || XmlExportEngine::sanitizeFieldName($old_header) != $urldecoded_sanitized_headers[$key]) {
                $is_update_headers = true;
                break;
            }
        }

        if ($is_update_headers) {
            $tmp_headers = $headers;
            $headers = $old_headers;
            foreach ($tmp_headers as $theader) {
                if (!in_array(XmlExportEngine::sanitizeFieldName($theader), $headers)) $headers[] = $theader;
            }
            $tmp_file = str_replace(basename($file), 'iteration_' . basename($file), $file);
            copy($file, $tmp_file);
            $in = fopen($tmp_file, 'r');
            $out = fopen($file, 'w');
            $headers = apply_filters('wp_all_export_csv_headers', $headers, XmlExportEngine::$exportID);

            if (XmlExportEngine::$exportOptions['include_bom']) {
                fwrite($out, chr(0xEF) . chr(0xBB) . chr(0xBF));
                self::getCsvWriter()->writeCsv($out, array_map(array('XmlCsvExport', '_get_valid_header_name'), $headers), XmlExportEngine::$exportOptions['delimiter']);
            } else {
                self::getCsvWriter()->writeCsv($out, array_map(array('XmlCsvExport', '_get_valid_header_name'), $headers), XmlExportEngine::$exportOptions['delimiter']);
            }

            apply_filters('wp_all_export_after_csv_line', $out, XmlExportEngine::$exportID);

            $exclude_old_headers = fgetcsv($in);

            if (is_resource($in)) {
                while (!feof($in)) {
                    $data = fgetcsv($in, 0, XmlExportEngine::$exportOptions['delimiter']);
                    if (empty($data)) continue;

                    if(count(array_values($data)) < count($old_headers)) {
                        $difference = count($old_headers) - count(array_values($data));
                        for($i = 0; $i < $difference; $i++) {
                            $data[] = "";
                        }
                    }

                    $data_assoc = array_combine($old_headers, array_values($data));
                    $line = array();
                    foreach ($headers as $header) {
                        $line[$header] = (isset($data_assoc[$header])) ? $data_assoc[$header] : '';
                    }
                    self::getCsvWriter()->writeCsv($out, $line, XmlExportEngine::$exportOptions['delimiter']);
                    apply_filters('wp_all_export_after_csv_line', $out, XmlExportEngine::$exportID);
                }
                fclose($in);
            }
            fclose($out);
            @unlink($tmp_file);
        }
    }

    private static function save_csv_to_file($file_path, $is_cron, $exported_by_cron)
    {
        if ($is_cron) {
            if (!$exported_by_cron) {
                // The BOM will help some programs like Microsoft Excel read your export file if it includes non-English characters.
                if (XmlExportEngine::$exportOptions['include_bom']) {
                    file_put_contents($file_path, chr(0xEF) . chr(0xBB) . chr(0xBF) . ob_get_clean());
                } else {
                    file_put_contents($file_path, ob_get_clean());
                }
            } else {
                file_put_contents($file_path, ob_get_clean(), FILE_APPEND);
            }

            return $file_path;

        } else {
            if (empty(PMXE_Plugin::$session->file)) {

                // generate export file name
                $export_file = wp_all_export_generate_export_file(XmlExportEngine::$exportID);

                // The BOM will help some programs like Microsoft Excel read your export file if it includes non-English characters.
                if (XmlExportEngine::$exportOptions['include_bom']) {
                    file_put_contents($export_file, chr(0xEF) . chr(0xBB) . chr(0xBF) . ob_get_clean());
                } else {
                    file_put_contents($export_file, ob_get_clean());
                }

                PMXE_Plugin::$session->set('file', $export_file);
                PMXE_Plugin::$session->save_data();

            } else {
                file_put_contents(PMXE_Plugin::$session->file, ob_get_clean(), FILE_APPEND);
            }

            return true;
        }
    }

    // [ \CSV Export Helpers ]

    public static function auto_genetate_export_fields($post, $errors = false)
    {
        $errors or $errors = new WP_Error();

        remove_all_filters("wp_all_export_init_fields", 10);
        remove_all_filters("wp_all_export_default_fields", 10);
        remove_all_filters("wp_all_export_other_fields", 10);
        remove_all_filters("wp_all_export_available_sections", 10);
        remove_all_filters("wp_all_export_available_data", 10);

        $engine = new XmlExportEngine($post, $errors);
        $engine->init_additional_data();

        $auto_generate = array(
            'ids' => array(),
            'cc_label' => array(),
            'cc_php' => array(),
            'cc_code' => array(),
            'cc_sql' => array(),
            'cc_type' => array(),
            'cc_options' => array(),
            'cc_value' => array(),
            'cc_name' => array()
        );

        $available_data = $engine->init_available_data();

        $available_sections = apply_filters("wp_all_export_available_sections", $engine->get('available_sections'));

        foreach ($available_sections as $slug => $section) {
            if (!empty($section['content']) and !empty($available_data[$section['content']])) {
                foreach ($available_data[$section['content']] as $field) {
                    if (isset($field['auto']) or 'product' != $post['cpt'] or ( is_array($post['cpt']) && !in_array('product', $post['cpt']))) {
                        $auto_generate['ids'][] = 1;
                        $auto_generate['cc_label'][] = is_array($field) ? $field['label'] : $field;
                        $auto_generate['cc_php'][] = 0;
                        $auto_generate['cc_code'][] = '';
                        $auto_generate['cc_sql'][] = '';
                        $auto_generate['cc_settings'][] = '';
                        $auto_generate['cc_type'][] = is_array($field) ? $field['type'] : $slug;
                        $auto_generate['cc_options'][] = '';
                        $auto_generate['cc_value'][] = is_array($field) ? $field['label'] : $field;
                        $auto_generate['cc_name'][] = is_array($field) ? $field['name'] : $field;
                    }
                }
            }

            if (!empty($section['additional'])) {
                foreach ($section['additional'] as $sub_slug => $sub_section) {
                    foreach ($sub_section['meta'] as $field) {
                        $field_options = (in_array($sub_slug, array('images', 'attachments'))) ? esc_attr('{"is_export_featured":true,"is_export_attached":true,"image_separator":"|"}') : '0';
                        $field_name = '';
                        switch ($sub_slug) {
                            case 'images':
                                $field_name = 'Image ' . $field['name'];
                                break;
                            case 'attachments':
                                $field_name = 'Attachment ' . $field['name'];
                                break;
                            default:
                                $field_name = $field['name'];
                                break;
                        }

                        if (is_array($field) and isset($field['auto'])) {
                            $auto_generate['ids'][] = 1;
                            $auto_generate['cc_label'][] = is_array($field) ? $field['label'] : $field;
                            $auto_generate['cc_php'][] = 0;
                            $auto_generate['cc_code'][] = '';
                            $auto_generate['cc_sql'][] = '';
                            $auto_generate['cc_settings'][] = '';
                            $auto_generate['cc_type'][] = is_array($field) ? $field['type'] : $sub_slug;
                            $auto_generate['cc_options'][] = $field_options;
                            $auto_generate['cc_value'][] = is_array($field) ? $field['label'] : $field;
                            $auto_generate['cc_name'][] = $field_name;
                        }
                    }
                }
            }
        }

        if (XmlExportWooCommerceOrder::$is_active) {
            foreach (XmlExportWooCommerceOrder::$order_sections as $slug => $section) {
                if (!empty($section['meta'])) {
                    foreach ($section['meta'] as $cur_meta_key => $field) {
                        $auto_generate['ids'][] = 1;
                        $auto_generate['cc_label'][] = is_array($field) ? $field['label'] : $cur_meta_key;
                        $auto_generate['cc_php'][] = 0;
                        $auto_generate['cc_code'][] = '';
                        $auto_generate['cc_sql'][] = '';
                        $auto_generate['cc_settings'][] = '';
                        $auto_generate['cc_type'][] = is_array($field) ? $field['type'] : 'woo_order';
                        $auto_generate['cc_options'][] = is_array($field) ? $field['options'] : $slug;
                        $auto_generate['cc_value'][] = is_array($field) ? $field['label'] : $cur_meta_key;
                        $auto_generate['cc_name'][] = is_array($field) ? $field['name'] : $field;
                    }
                }
            }
        }

        if (!XmlExportEngine::$is_comment_export && !XmlExportEngine::$is_woo_review_export) XmlExportEngine::$acf_export->auto_generate_export_fields($auto_generate);

        return $auto_generate;
    }

    /**
     * @param $xmlWriter
     * @param $key
     * @param $value
     */
    private static function addElement($xmlWriter, $key, $value)
    {
        $xmlWriter->startElement(preg_replace('/[^a-z0-9_-]/i', '', $key));
        $xmlWriter->writeData($value, preg_replace('/[^a-z0-9_-]/i', '', $key));
        $xmlWriter->closeElement();
    }

    /**
     * @return \Wpae\Csv\CsvWriter
     */
    public static function getCsvWriter()
    {
        if (is_null(self::$csvWriter)) {

            $csvStrategy = apply_filters('wp_all_export_csv_strategy', \Wpae\Csv\CsvWriter::CSV_STRATEGY_DEFAULT);
            $useRcfCompliantLineEndings = apply_filters('wp_all_export_use_csv_compliant_line_endings', false);

            if ($useRcfCompliantLineEndings) {
                \Wpae\Csv\CsvRfcUtils::setDefaultWriteEol(\Wpae\Csv\CsvRfcUtils::EOL_WRITE_RFC);
            }

            self::$csvWriter = new \Wpae\Csv\CsvWriter($csvStrategy);
        }

        return self::$csvWriter;
    }

}
