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/**
 * Copyright (c) 2013, impossibl.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of impossibl.com nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.impossibl.postgres.protocol.v30;

import com.impossibl.postgres.protocol.FieldFormatRef;
import com.impossibl.postgres.protocol.Notice;
import com.impossibl.postgres.protocol.RequestExecutor.FunctionCallHandler;
import com.impossibl.postgres.protocol.v30.ProtocolHandler.CommandError;
import com.impossibl.postgres.protocol.v30.ProtocolHandler.FunctionResult;
import com.impossibl.postgres.protocol.v30.ProtocolHandler.ReportNotice;
import com.impossibl.postgres.system.NoticeException;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import io.netty.buffer.ByteBuf;

public class FunctionCallRequest implements ServerRequest {

  private int functionId;
  private FieldFormatRef[] parameterFormats;
  private ByteBuf[] parameterBuffers;
  private FunctionCallHandler handler;
  private List notices;

  public FunctionCallRequest(int functionId, FieldFormatRef[] parameterFormats, ByteBuf[] parameterBuffers, FunctionCallHandler handler) {
    this.functionId = functionId;
    this.parameterFormats = parameterFormats;
    this.parameterBuffers = parameterBuffers;
    this.handler = handler;
    this.notices = new ArrayList<>();
  }

  private class Handler implements FunctionResult, CommandError, ReportNotice {

    @Override
    public String toString() {
      return "Function Call";
    }

    @Override
    public Action notice(Notice notice) {
      notices.add(notice);
      return Action.Resume;
    }

    @Override
    public Action functionResult(ByteBuf value) {
      handler.handleComplete(value, notices);
      return Action.Sync;
    }

    @Override
    public Action error(Notice error) throws IOException {
      handler.handleError(new NoticeException(error), notices);
      return Action.Sync;
    }

    @Override
    public void exception(Throwable cause) throws IOException {
      handler.handleError(cause, notices);
    }

  }

  @Override
  public ProtocolHandler createHandler() {
    return new Handler();
  }

  @Override
  public void execute(ProtocolChannel channel) throws IOException {

    channel
        .writeFunctionCall(functionId, parameterFormats, parameterBuffers)
        .flush();

  }

}