/*
 * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.carbon.transport.http.netty.listener;

import org.wso2.carbon.messaging.ServerConnector;
import org.wso2.carbon.messaging.ServerConnectorProvider;
import org.wso2.carbon.transport.http.netty.common.Constants;
import org.wso2.carbon.transport.http.netty.config.ConfigurationBuilder;
import org.wso2.carbon.transport.http.netty.config.ListenerConfiguration;
import org.wso2.carbon.transport.http.netty.config.TransportsConfiguration;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * {@code HTTPServerConnectorProvider} is responsible for providing and managing HTTP Listeners
 */
public class HTTPServerConnectorProvider extends ServerConnectorProvider {

    private ServerConnectorController serverConnectorController;

    public HTTPServerConnectorProvider() {
        super(Constants.PROTOCOL_NAME);
    }

    public List<ServerConnector> initializeConnectors(TransportsConfiguration trpConfig) {

        List<ServerConnector> connectors = new ArrayList<>();

        if (serverConnectorController == null) {
            createServerConnectorController(trpConfig);
        }

        Set<ListenerConfiguration> listenerConfigurationSet = trpConfig.getListenerConfigurations();

        listenerConfigurationSet.forEach(config -> {
            HTTPServerConnector connector = new HTTPServerConnector(config.getId());
            connector.setListenerConfiguration(config);
            connector.setServerConnectorController(serverConnectorController);
            if (config.isBindOnStartup()) {
                serverConnectorController.bindInterface(connector);
            }
            connectors.add(connector);
        });

        return connectors;
    }

    @Override
    public List<ServerConnector> initializeConnectors() {
        return initializeConnectors(ConfigurationBuilder.getInstance().getConfiguration());
    }

    @Override
    public ServerConnector createConnector(String s, Map<String, String> properties) {
        TransportsConfiguration trpConfig = ConfigurationBuilder.getInstance().getConfiguration();

        ListenerConfiguration config = buildListenerConfig(s, properties);

        trpConfig.getListenerConfigurations().add(config);
        if (serverConnectorController == null) {
            createServerConnectorController(trpConfig);
        }

        HTTPServerConnector connector = new HTTPServerConnector(config.getId());
        connector.setListenerConfiguration(config);
        connector.setServerConnectorController(serverConnectorController);
        if (config.isBindOnStartup()) {
            serverConnectorController.bindInterface(connector);
        }
        return connector;
    }

    /**
     * Helper method to initialize server connector controller for the provider.
     *
     * @param trpConfig to be used for initialization
     */
    private synchronized void createServerConnectorController(TransportsConfiguration trpConfig) {
        if (serverConnectorController == null) {
            serverConnectorController = new ServerConnectorController(trpConfig);
            serverConnectorController.start();
        }
    }

    /**
     * Method to build listener configuration using provided properties map.
     *
     * @param id            Listener id
     * @param properties    Property map
     * @return              listener config
     */
    private ListenerConfiguration buildListenerConfig(String id, Map<String, String> properties) {
        String host = properties.get(Constants.HTTP_HOST) != null ?
                properties.get(Constants.HTTP_HOST) : Constants.HTTP_DEFAULT_HOST;
        int port = Integer.parseInt(properties.get(Constants.HTTP_PORT));
        ListenerConfiguration config = new ListenerConfiguration(id, host, port);
        String schema = properties.get(Constants.HTTP_SCHEMA);
        if (schema != null && schema.equals("https")) {
            config.setScheme(schema);
            config.setKeyStoreFile(properties.get(Constants.HTTP_KEY_STORE_FILE));
            config.setKeyStorePass(properties.get(Constants.HTTP_KEY_STORE_PASS));
            config.setCertPass(properties.get(Constants.HTTP_CERT_PASS));
            //todo fill truststore stuff
        }
        return config;
    }
}

@@ -1709,61 +1709,8 @@
 );%0A%0A
-        if (serverConnectorController == null) %7B%0A    
     
@@ -1752,34 +1752,24 @@
 (trpConfig);
-%0A        %7D
 %0A%0A        Se
@@ -2856,61 +2856,8 @@
 g);%0A
-        if (serverConnectorController == null) %7B%0A    
     
@@ -2903,26 +2903,16 @@
 Config);
-%0A        %7D
 %0A%0A      

Remove null check as this is not a perf critical path