/*
    * Copyright 2017 LINE Corporation
    *
    * LINE Corporation 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:
    *
    *   https://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 com.linecorp.centraldogma.client.armeria.legacy;
  
  import java.util.List;
  
  import com.linecorp.armeria.client.Client;
  import com.linecorp.armeria.client.ClientRequestContext;
  import com.linecorp.armeria.client.RpcClient;
  import com.linecorp.armeria.client.SimpleDecoratingRpcClient;
  import com.linecorp.armeria.common.RpcRequest;
  import com.linecorp.armeria.common.RpcResponse;
  import com.linecorp.armeria.common.util.TimeoutMode;
  import com.linecorp.centraldogma.internal.api.v1.WatchTimeout;
  
  /**
   * Decorates a {@link Client} to enlarge responseTimeout when requesting watchFile or watchRepository.
   */
  class LegacyCentralDogmaTimeoutScheduler extends SimpleDecoratingRpcClient {
  
      /**
       * Creates a new instance that decorates the specified {@link Client}.
       */
      LegacyCentralDogmaTimeoutScheduler(RpcClient delegate) {
          super(delegate);
      }
  
      @Override
      public RpcResponse execute(ClientRequestContext ctx, RpcRequest req) throws Exception {
          final long responseTimeoutMillis = ctx.responseTimeoutMillis();
          if (responseTimeoutMillis > 0) {
              final String method = req.method();
              if ("watchFile".equals(method) || "watchRepository".equals(method)) {
                  final List<Object> params = req.params();
                  final long timeout = (Long) params.get(params.size() - 1);
                  if (timeout > 0) {
                      ctx.setResponseTimeoutMillis(TimeoutMode.EXTEND,
                                                   WatchTimeout.availableTimeout(timeout, responseTimeoutMillis));
                  }
              }
          }
          return unwrap().execute(ctx, req);
      }
  }