/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.tools.ant.taskdefs.optional.net;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;

/**
 * The sole purpose of this class is (note that it is package-private
 * is to serve as a separate, static compilation unit for importing
 * FTPClientConfig, to enable users who wish to use the FTP task
 * without using its new features to avoid  the need to
 * upgrade to jakarta-commons-net 1.4.0, where FTPClientConfig was
 * introduced.
  */
// CheckStyle:HideUtilityClassConstructorCheck OFF (bc)
class FTPConfigurator {
    /**
     * configures the supplied FTPClient with the various
     * attributes set in the supplied FTP task.
     * @param client the FTPClient to be configured
     * @param task the FTP task whose attributes are used to
     * configure the client
     * @return the client as configured.
     */
    static FTPClient configure(FTPClient client, FTPTaskConfig task) {
        task.log("custom configuration", Project.MSG_VERBOSE);
        FTPClientConfig config;
        String systemTypeKey = task.getSystemTypeKey();
        if (systemTypeKey != null && !systemTypeKey.isEmpty()) {
            config = new FTPClientConfig(systemTypeKey);
            task.log("custom config: system key = "
                    + systemTypeKey, Project.MSG_VERBOSE);
        } else {
            config = new FTPClientConfig();
            task.log("custom config: system key = default (UNIX)",
                    Project.MSG_VERBOSE);
        }

        String defaultDateFormatConfig = task.getDefaultDateFormatConfig();
        if (defaultDateFormatConfig != null) {
            config.setDefaultDateFormatStr(defaultDateFormatConfig);
            task.log("custom config: default date format = "
                    + defaultDateFormatConfig, Project.MSG_VERBOSE);
        }

        String recentDateFormatConfig = task.getRecentDateFormatConfig();
        if (recentDateFormatConfig != null) {
            config.setRecentDateFormatStr(recentDateFormatConfig);
            task.log("custom config: recent date format = "
                    + recentDateFormatConfig, Project.MSG_VERBOSE);
        }

        String serverLanguageCodeConfig = task.getServerLanguageCodeConfig();
        if (serverLanguageCodeConfig != null) {
            if (!serverLanguageCodeConfig.isEmpty()
                && !FTPClientConfig.getSupportedLanguageCodes()
                .contains(serverLanguageCodeConfig)) {
                throw new BuildException("unsupported language code" +
                                         serverLanguageCodeConfig);
            }
            config.setServerLanguageCode(serverLanguageCodeConfig);
            task.log("custom config: server language code = "
                    + serverLanguageCodeConfig, Project.MSG_VERBOSE);
        }

        String serverTimeZoneConfig = task.getServerTimeZoneConfig();
        if (serverTimeZoneConfig != null) {
            config.setServerTimeZoneId(serverTimeZoneConfig);
            task.log("custom config: server time zone ID = "
                    + serverTimeZoneConfig, Project.MSG_VERBOSE);
        }

        String shortMonthNamesConfig = task.getShortMonthNamesConfig();
        if (shortMonthNamesConfig != null) {
            config.setShortMonthNames(shortMonthNamesConfig);
            task.log("custom config: short month names = "
                    + shortMonthNamesConfig, Project.MSG_VERBOSE);
        }
        client.configure(config);
        return client;
    }
}
