//
   //  ========================================================================
   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.websocket.jsr356.server;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import javax.websocket.Decoder;
  import javax.websocket.DeploymentException;
  import javax.websocket.Encoder;
  import javax.websocket.Extension;
  import javax.websocket.server.ServerEndpoint;
  import javax.websocket.server.ServerEndpointConfig;
  
  import org.eclipse.jetty.websocket.common.scopes.WebSocketContainerScope;
  
  public class AnnotatedServerEndpointConfig implements ServerEndpointConfig
  {
      private final Class<?> endpointClass;
      private final String path;
      private final List<Class<? extends Decoder>> decoders;
      private final List<Class<? extends Encoder>> encoders;
      private final ServerEndpointConfig.Configurator configurator;
      private final List<String> subprotocols;
  
      private Map<String, Object> userProperties;
      private List<Extension> extensions;
  
      public AnnotatedServerEndpointConfig(WebSocketContainerScope containerScope, Class<?> endpointClass, ServerEndpoint anno) throws DeploymentException
      {
          this(containerScope,endpointClass,anno,null);
      }
  
      public AnnotatedServerEndpointConfig(WebSocketContainerScope containerScope, Class<?> endpointClass, ServerEndpoint anno, ServerEndpointConfig baseConfig) throws DeploymentException
      {
          ServerEndpointConfig.Configurator configr = null;
  
          // Copy from base config
          if (baseConfig != null)
          {
              configr = baseConfig.getConfigurator();
          }
  
          // Decoders (favor provided config over annotation)
          if (baseConfig != null && baseConfig.getDecoders() != null && baseConfig.getDecoders().size() > 0)
          {
              this.decoders = Collections.unmodifiableList(baseConfig.getDecoders());
          }
          else
          {
              this.decoders = Collections.unmodifiableList(Arrays.asList(anno.decoders()));
          }
  
          // Encoders (favor provided config over annotation)
          if (baseConfig != null && baseConfig.getEncoders() != null && baseConfig.getEncoders().size() > 0)
          {
              this.encoders = Collections.unmodifiableList(baseConfig.getEncoders());
          }
          else
          {
              this.encoders = Collections.unmodifiableList(Arrays.asList(anno.encoders()));
          }
  
          // Sub Protocols (favor provided config over annotation)
          if (baseConfig != null && baseConfig.getSubprotocols() != null && baseConfig.getSubprotocols().size() > 0)
          {
              this.subprotocols = Collections.unmodifiableList(baseConfig.getSubprotocols());
          }
          else
          {
              this.subprotocols = Collections.unmodifiableList(Arrays.asList(anno.subprotocols()));
          }
  
          // Path (favor provided config over annotation)
          if (baseConfig != null && baseConfig.getPath() != null && baseConfig.getPath().length() > 0)
          {
              this.path = baseConfig.getPath();
          }
          else
         {
             this.path = anno.value();
         }
 
         // supplied by init lifecycle
         this.extensions = new ArrayList<>();
         // always what is passed in
         this.endpointClass = endpointClass;
         // UserProperties in annotation
         this.userProperties = new HashMap<>();
         if (baseConfig != null && baseConfig.getUserProperties() != null && baseConfig.getUserProperties().size() > 0)
         {
             userProperties.putAll(baseConfig.getUserProperties());
         }
         
         ServerEndpointConfig.Configurator cfgr;
 
         if (anno.configurator() == ServerEndpointConfig.Configurator.class)
         {
             if (configr != null)
             {
                 cfgr = configr;
             }
             else
             {
                 cfgr = new ContainerDefaultConfigurator();
             }
         }
         else
         {
             try
             {
                 cfgr = anno.configurator().newInstance();
             }
             catch (InstantiationException | IllegalAccessException e)
             {
                 StringBuilder err = new StringBuilder();
                 err.append("Unable to instantiate ClientEndpoint.configurator() of ");
                 err.append(anno.configurator().getName());
                 err.append(" defined as annotation in ");
                 err.append(anno.getClass().getName());
                 throw new DeploymentException(err.toString(),e);
             }
         }
         
         // Make sure all Configurators obtained are decorated
         this.configurator = containerScope.getObjectFactory().decorate(cfgr);
     }
 
     @Override
     public ServerEndpointConfig.Configurator getConfigurator()
     {
         return configurator;
     }
 
     @Override
     public List<Class<? extends Decoder>> getDecoders()
     {
         return decoders;
     }
 
     @Override
     public List<Class<? extends Encoder>> getEncoders()
     {
         return encoders;
     }
 
     @Override
     public Class<?> getEndpointClass()
     {
         return endpointClass;
     }
 
     @Override
     public List<Extension> getExtensions()
     {
         return extensions;
     }
 
     @Override
     public String getPath()
     {
         return path;
     }
 
     @Override
     public List<String> getSubprotocols()
     {
         return subprotocols;
     }
 
     @Override
     public Map<String, Object> getUserProperties()
     {
         return userProperties;
     }
 
     @Override
     public String toString()
     {
         StringBuilder builder = new StringBuilder();
         builder.append("AnnotatedServerEndpointConfig[endpointClass=");
         builder.append(endpointClass);
         builder.append(",path=");
         builder.append(path);
         builder.append(",decoders=");
         builder.append(decoders);
         builder.append(",encoders=");
         builder.append(encoders);
         builder.append(",subprotocols=");
         builder.append(subprotocols);
         builder.append(",extensions=");
         builder.append(extensions);
         builder.append("]");
         return builder.toString();
     }
 }