/****************************************************************
 * 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.james.smtpserver;

import java.util.LinkedList;
import java.util.List;
import java.util.stream.Stream;

import org.apache.commons.configuration2.Configuration;
import org.apache.commons.configuration2.ex.ConfigurationException;
import org.apache.james.protocols.api.handler.CommandDispatcher;
import org.apache.james.protocols.api.handler.CommandHandlerResultLogger;
import org.apache.james.protocols.lib.handler.HandlersPackage;
import org.apache.james.protocols.smtp.core.ExpnCmdHandler;
import org.apache.james.protocols.smtp.core.HeloCmdHandler;
import org.apache.james.protocols.smtp.core.HelpCmdHandler;
import org.apache.james.protocols.smtp.core.NoopCmdHandler;
import org.apache.james.protocols.smtp.core.PostmasterAbuseRcptHook;
import org.apache.james.protocols.smtp.core.QuitCmdHandler;
import org.apache.james.protocols.smtp.core.ReceivedDataLineFilter;
import org.apache.james.protocols.smtp.core.RsetCmdHandler;
import org.apache.james.protocols.smtp.core.UnknownCmdHandler;
import org.apache.james.protocols.smtp.core.VrfyCmdHandler;
import org.apache.james.protocols.smtp.core.esmtp.AuthCmdHandler;
import org.apache.james.protocols.smtp.core.esmtp.EhloCmdHandler;
import org.apache.james.protocols.smtp.core.esmtp.MailSizeEsmtpExtension;
import org.apache.james.protocols.smtp.core.esmtp.StartTlsCmdHandler;
import org.apache.james.protocols.smtp.core.log.HookResultLogger;

/**
 * This class represent the base command handlers which are shipped with james.
 */
public class CoreCmdHandlerLoader implements HandlersPackage {

    private final List<String> commands = new LinkedList<>();

    public CoreCmdHandlerLoader() {
        // Insert the base commands in the Map
        Stream.of(
            JamesWelcomeMessageHandler.class,
            CommandDispatcher.class,
            AuthCmdHandler.class,
            JamesDataCmdHandler.class,
            EhloCmdHandler.class,
            ExpnCmdHandler.class,
            HeloCmdHandler.class,
            HelpCmdHandler.class,
            JamesMailCmdHandler.class,
            NoopCmdHandler.class,
            QuitCmdHandler.class,
            JamesRcptCmdHandler.class,
            RsetCmdHandler.class,
            VrfyCmdHandler.class,
            MailSizeEsmtpExtension.class,
            UsersRepositoryAuthHook.class,
            AuthRequiredToRelayRcptHook.class,
            SenderAuthIdentifyVerificationRcptHook.class,
            PostmasterAbuseRcptHook.class,
            ReceivedDataLineFilter.class,
            DataLineJamesMessageHookHandler.class,
            StartTlsCmdHandler.class,
            AddDefaultAttributesMessageHook.class,
            SendMailHandler.class,
            UnknownCmdHandler.class,
            // Add logging stuff
            CommandHandlerResultLogger.class,
            HookResultLogger.class)
        .map(Class::getName)
        .forEachOrdered(commands::add);
    }

    @Override
    public List<String> getHandlers() {
        return commands;
    }

    @Override
    public void init(Configuration config) throws ConfigurationException {

    }

    @Override
    public void destroy() {

    }
}
