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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed 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 io.servicecomb.transport.highway;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.protostuff.runtime.ProtobufFeature;
import io.servicecomb.foundation.vertx.client.tcp.AbstractTcpClientPackage;
import io.servicecomb.foundation.vertx.client.tcp.TcpClientConfig;
import io.servicecomb.foundation.vertx.client.tcp.TcpClientConnection;
import io.servicecomb.foundation.vertx.tcp.TcpOutputStream;
import io.servicecomb.transport.highway.message.LoginRequest;
import io.servicecomb.transport.highway.message.LoginResponse;
import io.servicecomb.transport.highway.message.RequestHeader;
import io.vertx.core.Context;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.net.NetClient;

public class HighwayClientConnection extends TcpClientConnection {
  private static final Logger LOGGER = LoggerFactory.getLogger(HighwayClientConnection.class);

  private ProtobufFeature protobufFeature = new ProtobufFeature();

  public HighwayClientConnection(Context context, NetClient netClient, String endpoint,
      TcpClientConfig clientConfig) {
    super(context, netClient, endpoint, clientConfig);
    setLocalSupportLogin(true);
  }

  public ProtobufFeature getProtobufFeature() {
    return protobufFeature;
  }

  @Override
  protected TcpOutputStream createLogin() {
    try {
      RequestHeader header = new RequestHeader();
      header.setMsgType(MsgType.LOGIN);

      LoginRequest login = new LoginRequest();
      login.setProtocol(HighwayTransport.NAME);
      login.setUseProtobufMapCodec(true);

      HighwayOutputStream os = new HighwayOutputStream(AbstractTcpClientPackage.getAndIncRequestId(), null);
      os.write(header, LoginRequest.getLoginRequestSchema(), login);
      return os;
    } catch (Throwable e) {
      throw new Error("impossible.", e);
    }
  }

  @Override
  protected boolean onLoginResponse(Buffer bodyBuffer) {
    try {
      LoginResponse response = LoginResponse.readObject(bodyBuffer);
      protobufFeature.setUseProtobufMapCodec(response.isUseProtobufMapCodec());
      return true;
    } catch (Throwable e) {
      LOGGER.error("decode login response failed.", e);
      return false;
    }
  }
}