<?php

use Qs\Export\Csv as ExportCsv;

/**
 * @method App_Form_Abstract_Obj _getDataObj()
 */

abstract class App_Form_Abstract_View extends Qs_ViewController
{
    protected $_actions = array();
    protected $_listOptions = array('defaultOrderBy' => 'added DESC');
    protected $_columns4ExportCsv;
    protected $_hasFilter = true;
    protected $_thanksPageAlias = 'thanks.html';
    protected $_exportFileName;
    protected $_settingsPrefix;

    protected $_userUnsetFields = array('id', 'salt', 'autologinCode', 'recoverCode', 'recoverCodeExpirationDate',
                                        'enabled', 'added', 'changed');
    /**
     * Fields array with callbacks. For example:
     * <code>
     *    array(
     *        'userName' => array($this, 'prepareUserName')
     *    );
     *    ...
     *    public function prepareUserName(array $userData)
     *    {
     *        return $userData['firstName'] . ' ' . $userData['lastName'];
     *    }
     * </code>
     * @var array
     */
    protected $_userFieldRules = array();

    protected function _getNewForm(array $options = array())
    {
        if ($this->_doc->hasAuth() && ($userData = $this->_doc->getAuthData())) {
            foreach ($this->_userUnsetFields as $field) {
                unset($userData[$field]);
            }

            if (!array_key_exists('defaults', $options)) {
                $options['defaults'] = array();
            }

            foreach ($this->_userFieldRules as $field => $callback) {
                if (is_callable($callback)) {
                    $userData[$field] = call_user_func($callback, $userData);
                }
            }

            $options['defaults'] = array_merge($userData, $options['defaults']);
        }

        return $this->_getFormInstance('new', $options);
    }

    protected function _postInsert()
    {
        $data = $this->_getDataObj()->clearData()->getData();
        $this->_sendAdminNotification($data);
        $this->_log();
        $this->_redirect();
        return $this;
    }

    protected function _redirect()
    {
        $this->redirect($this->url() . '/' . $this->_thanksPageAlias);
    }

    protected function _sendAdminNotification($data)
    {
        $to = App_Settings_Obj::getFormEmails($this->_settingsPrefix . 'To');
        $body = App_Settings_Obj::get($this->_settingsPrefix . 'Body');

        if (empty($to) || empty($body)) {
            return false;
        }

        $subject = App_Settings_Obj::get($this->_settingsPrefix . 'Subject');
        $from = App_Settings_Obj::getEmailFrom($this->_settingsPrefix . 'From');

        $mailData = $this->_getMailData($data);
        foreach ($mailData as $field => $value) {
            $body = str_replace('{' . $field . '}', $value, $body);
        }

        $mail = new Qs_Mail();
        $mail->setFrom($from);
        $mail->setSubject($subject);
        Qs_Mail::cutImageBaseUrl($body, BASE_URL);
        $mail->setHtml($body, null, WWW_PATH);
        $mail->addTo($to);
        $mail->send();

        return $this;
    }

    protected function _doView()
    {
        $item = $this->_getDataObj()->getData();
        if (empty($item)) {
            $this->_doc->displayError('Invalid submission ID');
            return $this;
        }
        $this->_getDataObj()->setViewed();
        $item['config'] = $this->getConfig()->toArray();
        $item['tpl'] = $this->getTemplate('view.tpl');
        $this->_doc->addItem($item);
        $this->_postView();
        return $this;
    }

    protected function _getDefaultLinks()
    {
        $links = parent::_getDefaultLinks();
        $params = array();
        if ($orderBy = Qs_Request::getGetValue('orderBy')) {
            $params['orderBy'] = $orderBy;
        }

        $filter = $this->_dataObj->getFilter();
        foreach ($filter as $field => $value) {
            if ($value) {
                $params[$field] = $value;
            }
        }

        $params['action'] = 'exportCsv';
        $links['exportCsv'] = array('title' => 'Export to .csv', 'url' => $this->url($params));

        return $links;
    }

    protected function _doExportCsv()
    {
        if ($this->_getDataObj()->hasFilter()) {
            $form = $this->_getFilterForm();
            if ($form->validate()) {
                $this->_getDataObj()->addFilter($form->getValues());
            }
        }

        $options = array();
        $options['order'] = array($this->_getList()->getOrderBy());
        $this->_dataObj->setSelectOptions($options);
        $stmt = $this->_getDataObj()->getListStatement($options);

        $columns = $this->_getColumns4ExportCsv();
        $blankRow = array_combine(array_keys($columns), array_fill(0, count($columns), ''));

        $rowCallback = function () use ($stmt, $columns, $blankRow) {
            $row = $stmt->fetch();
            if ($row) {
                $row = $this->_getRow4ExportCsv($row);
                $row = array_intersect_key($row, $columns);
                $row = array_merge($blankRow, $row);
            }

            return $row;
        };

        $helper = new ExportCsv([
            'fileName'    => $this->getConfig('itemsName') . ' {date}.csv',
            'columns'     => $columns,
            'rowCallback' => $rowCallback,
        ]);
        $helper->export();

        $this->_postExportCsv();
        exit;
    }

    protected function _postExportCsv()
    {
        $this->_log();
        return $this;
    }

    protected function _getColumns4ExportCsv()
    {
        if (null === $this->_columns4ExportCsv) {
            $this->_columns4ExportCsv = array('added' => 'Submitted');
            $fields = array_keys(Qs_Array::excludeKey($this->_getDataObj()->getTableMeta(), 'id', 'added', 'changed'));
            foreach ($fields as $field) {
                $this->_columns4ExportCsv[$field] = ucfirst(preg_replace('/([a-z])([A-Z])/', '$1 $2', $field));
            }
        }
        return $this->_columns4ExportCsv;
    }

    protected function _getRow4ExportCsv(&$data)
    {
        $row = str_replace(array("\n", "\r"), ' ', $data);
        return $row;
    }

    /**
     * @param array $data
     * @return array;
     * @throws Qs_Exception
     */
    protected function _getMailData(array $data)
    {
        throw new Qs_Exception('_getMailData() not implemented');
    }

    protected function _getFilterFields()
    {
        if (null === $this->_filterFields) {
            $this->_filterFields = $this->_getDataObj()->getFilterFields();
            foreach ($this->_filterFields as $key => $value) {
                if (!is_scalar($value)) {
                    unset($this->_filterFields[$key]);
                }
            }
            $this->_filterFields = array_flip($this->_filterFields);
            $columns = $this->_getColumns4ExportCsv();
            $this->_filterFields = array_intersect_key($columns, $this->_filterFields);
        }
        return $this->_filterFields;
    }

    public function getApplicationName()
    {
        if (null === $this->_applicationName) {
            $name = get_class($this);
            $name = substr($name, 4);
            $this->_applicationName = substr($name, 0, strrpos($name, '_') ?: null);
        }
        return $this->_applicationName;
    }

    protected function _getLog()
    {
        if (null === $this->_log) {
            parent::_getLog();
            $this->_log->setAction('insert', 'Submitted new "%formHeader%" Form');
        }
        return $this->_log;
    }

    protected function _getThankYouMessage()
    {
        $settingsField = $this->_settingsPrefix . 'ThanksMessage';
        if (($message = App_Settings_Obj::get($settingsField))) {
            return $message;
        };
        return $this->getConfig('thanksPageDefaultMessage');
    }
}