<?php

/**
 * Helper trait which holds account delete functions;
 */
trait Am_PersonalData
{

    function doDelete(User $user)
    {
        $errors = $this->cancelRecurringActiveInvoices($user);

        $errors = $this->pluginsDeletePersonalData($user, $errors);

        if (!empty($errors))
            return $errors;

        $login = $user->login;
        $user->delete();
        Am_Di::getInstance()->errorLogTable->log(___('Delete Personal Data: User %s was deleted by request', $login));
    }

    function doAnonymize(User $user)
    {
        $errors = $this->cancelRecurringActiveInvoices($user);

        $errors = $this->pluginsDeletePersonalData($user, $errors);

        if (!empty($errors))
            return $errors;

        $this->anonymizeUser($user);
    }
    
    function anonymizeUser(User $user)
    {

        $di = Am_Di::getInstance();

        // We delete data from these tables: am_access_log, am_cc, am_data, am_echeck, am_error_log, am_invoice_log
        // am_saved_pass, am_mail_queue
        $clean_tables = ['?_cc', '?_echeck', '?_error_log', '?_saved_pass', '?_upload'];
        if(!$di->config->get('keep-access-log'))
        {
            $clean_tables[] = '?_access_log';
        }
        
        foreach ($clean_tables as $tbl)
        {
            $di->db->query("DELETE  FROM {$tbl} WHERE user_id=?", $user->pk());
        }

        //$user->data()->delete();
        $di->db->query(""
            . "DELETE FROM ?_invoice_log "
            . "WHERE user_id = ?", $user->pk());

        $di->db->query("DELETE FROM ?_mail_queue WHERE recipients=?", $user->email);

        // Fields to keep: 
        $to_keep = ['added', 'last_login'];

        //We must keep remote_addr and country for VAT purpose. 
        if (count($di->plugins_tax->getAllEnabled()))
        {
            $to_keep = array_merge($to_keep, ['country', 'remote_addr']);
        }
        if ($from_config = $di->config->get('keep-personal-fields'))
        {
            $to_keep = array_merge($to_keep, $from_config);
        }

        if(
            $di->modules->isEnabled('aff') 
            && $di->config->get('keep-payout-info') 
            && $di->affPayoutDetailTable->findBy(['aff_id' => $user->pk()])
            )
        {
            $to_keep = array_merge(
                $to_keep, 
                ['name_f', 'name_l', 'email', 'street', 'street2', 'city', 'state', 'zip', 'country']
                );
            foreach($di->userTable->getPersonalDataFieldOptions() as $k=>$v)
            {
                if(strpos($k, 'data.aff_')===0)
                {
                    $to_keep[] = $k;
                }
            }
        }
        
        $update = $data_to_delete = [];
        foreach ($di->userTable->getPersonalDataFieldOptions() as $k => $v)
        {
            if (in_array($k, $to_keep))
            {
                continue;
            }
            else if ($k == 'login')
            {
                $update[$k] = 'deleted-user-' . $user->pk() . "*";
            }
            else if ($k == 'email')
            {
                $update[$k] = sprintf("deleted-user-%s*@email.invalid", $user->pk());
            }
            else if (strpos($k, 'data.') === 0)
            {
                $data_to_delete[] = substr($k, 5);
            }
            else
            {
                $update[$k] = '';
            }
        }

        $update['unsubscribed'] = 1;
        $update['is_locked'] = 1;

        $di->db->query("UPDATE  ?_user SET ?a WHERE user_id=?", $update, $user->pk());

        if (!empty($data_to_delete))
        {
            $di->db->query(
                "DELETE FROM ?_data where `table` = 'user' AND `id` = ? AND `key` IN (?a)", 
                $user->pk(), 
                $data_to_delete
                );
        }

        // make sure that all user's invoices are cancelled; 
        $di->db->query(
            "UPDATE ?_invoice SET status=? WHERE user_id =? AND status=?", 
            Invoice::RECURRING_CANCELLED, 
            $user->pk(), 
            Invoice::RECURRING_ACTIVE
            );
        
        
        $di->db->query("UPDATE ?_access SET begin_date = ? WHERE  user_id = ? AND begin_date>?", $di->sqlDate, $user->pk(), $di->sqlDate);
        $di->db->query("UPDATE ?_access SET expire_date = ? WHERE user_id = ? AND expire_date>?", $di->sqlDate, $user->pk(), $di->sqlDate);
        
        $di->errorLogTable->log(
            ___('Delete Personal Data: User %s(%s) was anonymized by request', $user->login, !empty($update['login']) ? $update['login'] : $user->login
        ));
    }

    function pluginsDeletePersonalData(User $user, $errors = [])
    {

        /**
         * Remove record from third-party scripts. 
         */
        foreach (Am_Di::getInstance()->plugins_protect->getAllEnabled() as $plugin)
        {
            if (!($plugin instanceof Am_Protect_Databased))
                continue;

            try
            {
                $plugin->onUserAfterDelete(new Am_Event_UserAfterDelete($user));
            }
            catch (Exception $ex)
            {
                    $errors[] = ___('Unable to delete record from %s : %s', $plugin->getId(), $ex->getMessage());
            }
        }
        /**
         * Notify other plugins or modules. 
         */
        $event = new Am_Event(Am_Event::DELETE_PERSONAL_DATA, ['user' => $user]);

        Am_Di::getInstance()->hook->call($event);

        $errors = array_reduce($event->getReturn(), function($_, $item)
        {
            return array_merge((array)$_, (array)$item);
        }, $errors);

        return $errors;
    }

    /**
     * Return array of errors on failure. empty on success; 
     * @param type $user
     * @return Array $errors;
     */
    function cancelRecurringActiveInvoices(User $user)
    {
        $errors = [];
        foreach ($this->getRecurringActiveInvoices($user) as $invoice)
        {
            $result = new Am_Paysystem_Result();
            try
            {
                $paysys = $invoice->getPaysystem();
                if(!is_null($paysys))
                    $paysys->cancelAction($invoice, 'cancel-admin', $result);
            }
            catch (Exception $e)
            {
                Am_Di::getInstance()->errorLogTable->logException($e);
                $errors[] = ___('Unable to cancel invoice #%s: %s', $invoice->pk(), $e->getMessage());
                continue;
            }

            if ($result->getStatus() != Am_Paysystem_Result::SUCCESS)
            {
                $statusMsg = ___('status was not success');
                $errors[] = ___('Unable to cancel invoice #%s: %s', $invoice->pk(), $statusMsg);
            }
        }
        return $errors;
    }

    function getRecurringActiveInvoices(User $user)
    {
        return array_map(
            function (Invoice $invoice)
        {
            $invoice->_paysysName = $invoice->paysys_id;
            return $invoice;
        }, Am_Di::getInstance()->invoiceTable->findBy(['user_id' => $user->pk(), 'status' => Invoice::RECURRING_ACTIVE])
        );
    }

    function buildPersonalDataArray(User $user)
    {
        $di = Am_Di::getInstance();

        $data = [];
        $fields = $di->config->get('personal-data-download-fields');
        foreach ($di->userTable->getPersonalDataFieldOptions() as $k => $v)
        {

            if (!(empty($fields) || in_array($k, $fields)))
                continue;

            if (strpos($k, 'data.') === 0)
            {
                $value = $user->data()->get(substr($k, 5));
            }
            else
            {
                $value = $user->get($k);
            }

            $data[] = ['title' => $v, 'name' => $k, 'value' => $value];
        }


        $data = $di->hook->filter($data, Am_Event::BUILD_PERSONAL_DATA_ARRAY, ['user' => $user]);
        return $data;
    }
    
    function addDeleteRequest(User $user, $errors, $ip)
    {
        $errStr = !empty($errors) ? implode("\n", $errors) : "";
        Am_Di::getInstance()->db->query(""
            . "INSERT INTO ?_user_delete_request "
            . "SET "
            . "user_id=?, added=?, remote_addr=?, errors=?, completed=? "
            . "ON DUPLICATE KEY UPDATE errors=?, completed=?", $user->pk(), Am_Di::getInstance()->sqlDateTime, $ip, $errStr, 0, 
            $errStr, 0
        );
    }
    
    function notifyAdmin(User $user, $errors = [])
    {
        if ($et = Am_Mail_Template::load('delete_personal_data_notification'))
        {
            $et->setUser($user);
            if (!empty($errors))
            {
                $et->setErrorsText(
                    ___("aMember has attempted to process this request automatically, but got several errors: \n"
                        . "%s\n"
                        . "Please review error messages and process this request manually\n", implode("\n", $errors))
                );
            }

            $et->send(Am_Mail_Template::TO_ADMIN);
        }
    }
    
    

}
