<?php

/**
 * Export configuration wizard
 *
 * @author Max Tsiplyakov <makstsiplyakov@gmail.com>
 */
class PMXE_Admin_Export extends PMXE_Controller_Admin
{

    protected $isWizard = true; // indicates whether controller is in wizard mode (otherwise it called to be delegated an edit action)

    protected function init()
    {

        parent::init();

        if ('PMXE_Admin_Manage' == PMXE_Plugin::getInstance()->getAdminCurrentScreen()->base) { // prereqisites are not checked when flow control is deligated
            $id = $this->input->get('id');
            $this->data['export'] = $export = new PMXE_Export_Record();
            if (!$id or $export->getById($id)->isEmpty()) { // specified import is not found
                wp_redirect(add_query_arg('page', 'pmxe-admin-manage', admin_url('admin.php')));
                die();
            }
            $this->isWizard = false;
            $export->fix_template_options();
        } else {
            $action = PMXE_Plugin::getInstance()->getAdminCurrentScreen()->action;
            $this->_step_ready($action);
        }

        // preserve id parameter as part of baseUrl
        $id = $this->input->get('id') and $this->baseUrl = add_query_arg('id', $id, $this->baseUrl);

    }

    public function set($var, $val)
    {
        $this->{$var} = $val;
    }

    public function get($var)
    {
        return $this->{$var};
    }

    /**
     * Checks whether corresponding step of wizard is complete
     * @param string $action
     * @return bool
     */
    protected function _step_ready($action)
    {

        // step #1: xml selction - has no prerequisites
        if ('index' == $action) return true;

        if ('element' == $action) return true;

        $this->data['update_previous'] = $update_previous = new PMXE_Export_Record();

        $update_previous->getById(PMXE_Plugin::$session->update_previous);

        if (!$update_previous->isEmpty()) {
            $update_previous->fix_template_options();
        }

        if ('options' == $action) return true;

        if (!PMXE_Plugin::$session->has_session()) {
            wp_redirect_or_javascript($this->baseUrl);
            die();
        }

        if ('process' == $action) return true;

    }

    /**
     * Step #1: Choose CPT
     */
    public function index()
    {

        $action = $this->input->get('action');

        $DefaultOptions = array(
            'cpt' => '',
            'export_to' => 'xml',
            'export_type' => 'specific',
            'wp_query' => '',
            'filter_rules_hierarhy' => '',
            'product_matching_mode' => 'strict',
            'wp_query_selector' => 'wp_query',
            'auto_generate' => 0,
            'taxonomy_to_export' => '',
            'created_at_version' => PMXE_VERSION
        );

        if (!in_array($action, array('index'))) {
            PMXE_Plugin::$session->clean_session();
            $this->data['preload'] = false;
        } else {
            $DefaultOptions = (PMXE_Plugin::$session->has_session() ? PMXE_Plugin::$session->get_clear_session_data() : array()) + $DefaultOptions;
            $this->data['preload'] = true;
        }

        $this->data['post'] = $post = $this->input->post($DefaultOptions);

        if (is_array($this->data['post']['cpt'])) $this->data['post']['cpt'] = $this->data['post']['cpt'][0];

        // Delete history
        $history_files = PMXE_Helper::safe_glob(PMXE_ROOT_DIR . '/history/*', PMXE_Helper::GLOB_RECURSE | PMXE_Helper::GLOB_PATH);
        if (!empty($history_files)) {
            foreach ($history_files as $filePath) {
                @file_exists($filePath) and @unlink($filePath);
            }
        }

        if (!class_exists('ZipArchive')) {
            $this->errors->add('form-validation', __('ZipArchive class is missing on your server.<br/>Please contact your web hosting provider and ask them to install and activate ZipArchive.', 'wp_all_export_plugin'));
        }
        if (!class_exists('XMLReader') or !class_exists('XMLWriter')) {
            $this->errors->add('form-validation', __('Required PHP components are missing.<br/><br/>WP All Export requires XMLReader, and XMLWriter PHP modules to be installed.<br/>These are standard features of PHP, and are necessary for WP All Export to write the files you are trying to export.<br/>Please contact your web hosting provider and ask them to install and activate the DOMDocument, XMLReader, and XMLWriter PHP modules.', 'wp_all_export_plugin'));
        }

        if ($this->input->post('is_submitted')) {

            PMXE_Plugin::$session->set('export_type', $post['export_type']);
            PMXE_Plugin::$session->set('filter_rules_hierarhy', $post['filter_rules_hierarhy']);
            PMXE_Plugin::$session->set('product_matching_mode', $post['product_matching_mode']);
            PMXE_Plugin::$session->set('wp_query_selector', $post['wp_query_selector']);
            PMXE_Plugin::$session->set('taxonomy_to_export', $post['taxonomy_to_export']);
            PMXE_Plugin::$session->set('created_at_version', $post['created_at_version']);

            if (!empty($post['auto_generate'])) {
                $auto_generate = XmlCsvExport::auto_genetate_export_fields($post, $this->errors);

                foreach ($auto_generate as $key => $value) {
                    PMXE_Plugin::$session->set($key, $value);
                }

                PMXE_Plugin::$session->save_data();
            } else {
                $engine = new XmlExportEngine($post, $this->errors);
                $engine->init_additional_data();
            }
        }

        if ($this->input->post('is_submitted') and !$this->errors->get_error_codes()) {

            check_admin_referer('choose-cpt', '_wpnonce_choose-cpt');

            PMXE_Plugin::$session->save_data();

            if (!empty($post['auto_generate'])) {
                wp_redirect(add_query_arg('action', 'options', $this->baseUrl));
                die();
            } else {
                wp_redirect(add_query_arg('action', 'template', $this->baseUrl));
                die();
            }

        }

        $this->render();
    }

    /**
     * Step #2: Export Template
     */
    public function template()
    {

        $template = new PMXE_Template_Record();

        $default = PMXE_Plugin::get_default_import_options();

        $this->data['dismiss_warnings'] = 0;

        if ($this->isWizard) {
            // New export
            $DefaultOptions = (PMXE_Plugin::$session->has_session() ? PMXE_Plugin::$session->get_clear_session_data() : array()) + $default;
            $post = $this->input->post($DefaultOptions);
        } else {
            // Edit export
            $DefaultOptions = $this->data['export']->options + $default;

            if (empty($this->data['export']->options['export_variations'])) {
                $DefaultOptions['export_variations'] = XmlExportEngine::VARIABLE_PRODUCTS_EXPORT_PARENT_AND_VARIATION;
            }
            if (empty($this->data['export']->options['export_variations_title'])) {
                $DefaultOptions['export_variations_title'] = XmlExportEngine::VARIATION_USE_DEFAULT_TITLE;
            }
            $post = $this->input->post($DefaultOptions);
            $post['scheduled'] = $this->data['export']->scheduled;

            foreach ($post as $key => $value) {
                PMXE_Plugin::$session->set($key, $value);
            }
            $this->data['dismiss_warnings'] = get_option('wpae_dismiss_warnings_' . $this->data['export']->id, 0);
        }

        $max_input_vars = @ini_get('max_input_vars');

        if (ctype_digit($max_input_vars) && count($_POST, COUNT_RECURSIVE) >= $max_input_vars) {
            $this->errors->add('form-validation', sprintf(__('You\'ve reached your max_input_vars limit of %d. Please contact your web host to increase it.', 'wp_all_export_plugin'), $max_input_vars));
        }

        PMXE_Plugin::$session->save_data();

        $this->data['post'] =& $post;

        PMXE_Plugin::$session->set('is_loaded_template', '');

        $this->data['engine'] = null;

        XmlExportEngine::$exportQuery = PMXE_Plugin::$session->get('exportQuery');

        if (($load_template = $this->input->post('load_template'))) { // init form with template selected
            if (!$template->getById($load_template)->isEmpty()) {
                $template_options = $template->options;
                unset($template_options['cpt']);
                unset($template_options['wp_query']);
                unset($template_options['filter_rules_hierarhy']);
                unset($template_options['product_matching_mode']);
                unset($template_options['wp_query_selector']);
                $this->data['post'] = array_merge($post, $template_options);
                PMXE_Plugin::$session->set('is_loaded_template', $load_template);
            }

        } elseif ($this->input->post('is_submitted')) {
            check_admin_referer('template', '_wpnonce_template');

            if (empty($post['cc_type'][0]) && !in_array($post['xml_template_type'], array('custom', 'XmlGoogleMerchants'))) {
                $this->errors->add('form-validation', __('You haven\'t selected any columns for export.', 'wp_all_export_plugin'));
            }

            if ('csv' == $post['export_to'] and '' == $post['delimiter']) {
                $this->errors->add('form-validation', __('CSV delimiter must be specified.', 'wp_all_export_plugin'));
            }

            if ('xml' == $post['export_to'] && !in_array($post['xml_template_type'], array('custom', 'XmlGoogleMerchants'))) {
                $post['main_xml_tag'] = preg_replace('/[^a-z0-9_]/i', '', $post['main_xml_tag']);
                if (empty($post['main_xml_tag'])) {
                    $this->errors->add('form-validation', __('Main XML Tag is required.', 'wp_all_export_plugin'));
                }

                $post['record_xml_tag'] = preg_replace('/[^a-z0-9_]/i', '', $post['record_xml_tag']);
                if (empty($post['record_xml_tag'])) {
                    $this->errors->add('form-validation', __('Single Record XML Tag is required.', 'wp_all_export_plugin'));
                }

                if ($post['main_xml_tag'] == $post['record_xml_tag']) {
                    $this->errors->add('form-validation', __('Main XML Tag equals to Single Record XML Tag.', 'wp_all_export_plugin'));
                }
            }

            if (($post['export_to'] == XmlExportEngine::EXPORT_TYPE_XML) && in_array($post['xml_template_type'], array('custom', 'XmlGoogleMerchants'))) {

                if (empty($post['custom_xml_template'])) {
                    $this->errors->add('form-validation', __('XML template is empty.', 'wp_all_export_plugin'));
                }

                // Convert Custom XML template to default
                if (!empty($post['custom_xml_template'])) {

                    $post['custom_xml_template'] = str_replace('<ID>', '<id>', $post['custom_xml_template']);
                    $post['custom_xml_template'] = str_replace('</ID>', '</id>', $post['custom_xml_template']);

                    $post['custom_xml_template'] = str_replace("<!-- BEGIN POST LOOP -->", "<!-- BEGIN LOOP -->", $post['custom_xml_template']);
                    $post['custom_xml_template'] = str_replace("<!-- END POST LOOP -->", "<!-- END LOOP -->", $post['custom_xml_template']);

                    $this->data['engine'] = new XmlExportEngine($post, $this->errors);

                    $this->data['engine']->init_additional_data();

                    $this->data = array_merge($this->data, $this->data['engine']->init_available_data());

                    $result = $this->data['engine']->parse_custom_xml_template();

                    if (!$this->errors->get_error_codes()) {
                        $post = array_merge($post, $result);
                    }
                }
            }

            if (!$this->errors->get_error_codes()) {

                if (!empty($post['name']) and !empty($post['save_template_as'])) { // save template in database
                    $template->getByName($post['name'])->set(array(
                        'name' => $post['name'],
                        'options' => $post
                    ))->save();
                    PMXE_Plugin::$session->set('saved_template', $template->id);
                }

                if ($this->isWizard) {
                    foreach ($this->data['post'] as $key => $value) {
                        PMXE_Plugin::$session->set($key, $value);
                    }
                    PMXE_Plugin::$session->save_data();
                    wp_redirect(add_query_arg('action', 'options', $this->baseUrl));
                    die();
                } else {
                    $this->data['export']->set(array('options' => $post, 'settings_update_on' => date('Y-m-d H:i:s')))->save();

                    if (!empty($post['friendly_name'])) {
                        $this->data['export']->set(array('friendly_name' => $post['friendly_name'], 'scheduled' => (($post['is_scheduled']) ? $post['scheduled_period'] : '')))->save();
                    }

                    wp_redirect(add_query_arg(array('page' => 'pmxe-admin-manage', 'pmxe_nt' => urlencode(__('Options updated', 'pmxi_plugin'))) + array_intersect_key($_GET, array_flip($this->baseUrlParamNames)), admin_url('admin.php')));
                    die();
                }
            }
        }

        if (empty($this->data['engine'])) {

            $this->data['engine'] = new XmlExportEngine($post, $this->errors);

            $this->data['engine']->init_additional_data();

            $this->data = array_merge($this->data, $this->data['engine']->init_available_data());
        }

        $this->data['available_data_view'] = $this->data['engine']->render();

        $this->data['available_fields_view'] = $this->data['engine']->render_new_field();

        if (class_exists('SitePress')) {
            global $sitepress;
            $langs = $sitepress->get_active_languages();
            if (!empty($langs)) {
                // prepare active languages list
                $language_list = array('all' => 'All');
                foreach ($langs as $code => $langInfo) {
                    $language_list[$code] = "<img width='18' height='12' src='" . $sitepress->get_flag_url($code) . "' style='position:relative; top: 2px;'/> " . $langInfo['display_name'];
                    if(isset($this->default_language)){
                        if ($code == $this->default_language) $language_list[$code] .= ' ( <strong>default</strong> )';
                    }

                }
            }
            $this->data['wpml_options'] = $language_list;
        }

        $this->render();
    }

    /**
     * Step #3: Export Options
     */
    public function options()
    {
        $default = PMXE_Plugin::get_default_import_options();

        if ($this->isWizard) {

            $DefaultOptions = (PMXE_Plugin::$session->has_session() ? PMXE_Plugin::$session->get_clear_session_data() : array()) + $default;
            $post = $this->input->post($DefaultOptions);

            if(isset($post['update_previous'])) {
                $exportId = $post['update_previous'];
            } else {
                $exportId = false;
            }
            
            if(!$exportId) {
                $export = $this->data['update_previous'];
                $export->set(
                    array(
                        'triggered' => 0,
                        'processing' => 0,
                        'exported' => 0,
                        'executing' => 0,
                        'canceled' => 0,
                        'options' => $post,
                        'friendly_name' => $this->getFriendlyName($post),
                        'last_activity' => date('Y-m-d H:i:s')
                    )
                )->save();

                PMXE_Plugin::$session->set('update_previous', $export->id);
                PMXE_Plugin::$session->set('friendly_name', $this->getFriendlyName($post));
                PMXE_Plugin::$session->save_data();
                $exportId = $export->id;
            }
            $this->data['export_id'] = $exportId;
            $this->data['export'] = new PMXE_Export_Record();
            $this->data['export'] = $this->data['export']->getBy('id', $exportId);

            if(empty($post['friendly_name'])) {
                $post['friendly_name'] = $this->getFriendlyName($post);
            }
        }
        else {
            $DefaultOptions = $this->data['export']->options + $default;
            if (empty($this->data['export']->options['export_variations'])) {
                $DefaultOptions['export_variations'] = XmlExportEngine::VARIABLE_PRODUCTS_EXPORT_PARENT_AND_VARIATION;
            }
            if (empty($this->data['export']->options['export_variations_title'])) {
                $DefaultOptions['export_variations_title'] = XmlExportEngine::VARIATION_USE_DEFAULT_TITLE;
            }
            $post = $this->input->post($DefaultOptions);
            $post['scheduled'] = $this->data['export']->scheduled;

            foreach ($post as $key => $value) {
                PMXE_Plugin::$session->set($key, $value);
            }
            PMXE_Plugin::$session->save_data();
            $this->data['export_id'] = $this->data['export']->id;
        }

        $this->data['engine'] = new XmlExportEngine($post, $this->errors);

        $this->data['engine']->init_available_data();

        $this->data['post'] =& $post;

        if ($this->input->post('is_submitted')) {

            check_admin_referer('options', '_wpnonce_options');

            if ($post['is_generate_templates'] and '' == $post['template_name']) {
                $friendly_name = $this->getFriendlyName($post);
                $post['template_name'] = $friendly_name;
            }

            if ($this->isWizard) {
                if (!$this->errors->get_error_codes()) {
                    foreach ($this->data['post'] as $key => $value) {
                        PMXE_Plugin::$session->set($key, $value);
                    }
                    PMXE_Plugin::$session->save_data();
                    wp_redirect(add_query_arg('action', 'process', $this->baseUrl));
                    die();
                }
            } else {
                $this->errors->remove('count-validation');
                if (!$this->errors->get_error_codes()) {
                    $this->data['export']->set(array('options' => $post, 'settings_update_on' => date('Y-m-d H:i:s')))->save();
                    if (!empty($post['friendly_name'])) {
                        $this->data['export']->set(array('friendly_name' => $post['friendly_name'], 'scheduled' => (($post['is_scheduled']) ? $post['scheduled_period'] : '')))->save();
                    }
                    wp_redirect(add_query_arg(array('page' => 'pmxe-admin-manage', 'pmxe_nt' => urlencode(__('Options updated', 'wp_all_export_plugin'))) + array_intersect_key($_GET, array_flip($this->baseUrlParamNames)), admin_url('admin.php')));
                    die();
                }
            }
        }

        $this->render();
    }

    /**
     * Step #4: Export Processing
     */
    public function process()
    {
        @set_time_limit(0);

        $export = $this->data['update_previous'];

        if (!PMXE_Plugin::is_ajax()) {

            if ("" == PMXE_Plugin::$session->friendly_name) {

                $post_types = PMXE_Plugin::$session->get('cpt');
                if (!empty($post_types)) {
                    if (in_array('users', $post_types)) {
                        $friendly_name = 'Users Export - ' . date("Y F d H:i");
                    } elseif (in_array('shop_customer', $post_types)) {
                        $friendly_name = 'Customers Export - ' . date("Y F d H:i");
                    } elseif (in_array('comments', $post_types)) {
                        $friendly_name = 'Comments Export - ' . date("Y F d H:i");
                    } elseif (in_array('taxonomies', $post_types)) {
                        $tx = get_taxonomy(PMXE_Plugin::$session->get('taxonomy_to_export'));
                        if (!empty($tx->labels->name)) {
                            $friendly_name = $tx->labels->name . ' Export - ' . date("Y F d H:i");
                        } else {
                            $friendly_name = 'Taxonomy Terms Export - ' . date("Y F d H:i");
                        }
                    } else {
                        $post_type_details = get_post_type_object(array_shift($post_types));
                        $friendly_name = $post_type_details->labels->name . ' Export - ' . date("Y F d H:i");
                    }
                } else {
                    $friendly_name = 'WP_Query Export - ' . date("Y F d H:i");
                }

                PMXE_Plugin::$session->set('friendly_name', $friendly_name);
            }

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

            $export->set(
                array(
                    'triggered' => 0,
                    'processing' => 0,
                    'exported' => 0,
                    'executing' => 1,
                    'canceled' => 0,
                    'options' => PMXE_Plugin::$session->get_clear_session_data(),
                    'friendly_name' => PMXE_Plugin::$session->friendly_name,
                    'scheduled' => (PMXE_Plugin::$session->is_scheduled) ? PMXE_Plugin::$session->scheduled_period : '',
                    //'registered_on' => date('Y-m-d H:i:s'),
                    'last_activity' => date('Y-m-d H:i:s')
                )
            )->save();

            // create an import for this export
            if ($export->options['export_to'] == 'csv' || !in_array($export->options['xml_template_type'], array('custom', 'XmlGoogleMerchants'))) PMXE_Wpallimport::create_an_import($export);
            PMXE_Plugin::$session->set('update_previous', $export->id);
            PMXE_Plugin::$session->save_data();

            do_action('pmxe_before_export', $export->id);

        }

        $this->render();
    }

    /**
     * @param $post
     * @return string
     */
    protected function getFriendlyName($post)
    {
        $friendly_name = '';
        $post_types = PMXE_Plugin::$session->get('cpt');
        if (!empty($post_types)) {
            if (in_array('users', $post_types)) {
                $friendly_name = 'Users Export - ' . date("Y F d H:i");
                return $friendly_name;
            } elseif (in_array('shop_customer', $post_types)) {
                $friendly_name = 'Customers Export - ' . date("Y F d H:i");
                return $friendly_name;
            } elseif (in_array('comments', $post_types)) {
                $friendly_name = 'Comments Export - ' . date("Y F d H:i");
                return $friendly_name;
            } elseif (in_array('taxonomies', $post_types)) {
                $tx = get_taxonomy($post['taxonomy_to_export']);
                if (!empty($tx->labels->name)) {
                    $friendly_name = $tx->labels->name . ' Export - ' . date("Y F d H:i");
                    return $friendly_name;
                } else {
                    $friendly_name = 'Taxonomy Terms Export - ' . date("Y F d H:i");
                    return $friendly_name;
                }
            } else {
                $post_type_details = get_post_type_object(array_shift($post_types));
                $friendly_name = $post_type_details->labels->name . ' Export - ' . date("Y F d H:i");
                return $friendly_name;
            }
        } else {
            $friendly_name = 'WP_Query Export - ' . date("Y F d H:i");
            return $friendly_name;
        }
    }
}