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/*
 * Copyright (C) 2019 Knot.x Project
 *
 * 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.knotx.server.api.handler;

import io.knotx.server.api.context.ClientResponse;
import io.knotx.server.api.context.RequestEvent;
import io.knotx.commons.http.request.DataObjectsUtil;
import io.vertx.core.buffer.Buffer;
import io.vertx.reactivex.core.MultiMap;
import java.util.Optional;

public class RequestEventHandlerResult {

  private RequestEvent requestEvent;
  private String errorMessage;
  private Integer statusCode;
  private MultiMap headers = MultiMap.caseInsensitiveMultiMap();
  private Buffer body;

  private RequestEventHandlerResult() {
    //private
  }

  public static RequestEventHandlerResult success(RequestEvent requestEvent) {
    final RequestEventHandlerResult result = new RequestEventHandlerResult();
    result.requestEvent = requestEvent;
    return result;
  }

  public static RequestEventHandlerResult fail(String errorMessage) {
    final RequestEventHandlerResult result = new RequestEventHandlerResult();
    result.errorMessage = errorMessage;

    return result;
  }

  //ToDo -> finishes immediately handler routing
  public static RequestEventHandlerResult end(ClientResponse clientResponse) {
    throw new UnsupportedOperationException("Implement me!");
  }

  public RequestEventHandlerResult withStatusCode(int statusCode) {
    this.statusCode = statusCode;
    return this;
  }

  public RequestEventHandlerResult withHeaders(MultiMap headers) {
    this.headers = headers;
    return this;
  }

  public RequestEventHandlerResult withBody(Buffer body) {
    this.body = body;
    return this;
  }

  public Optional getRequestEvent() {
    return Optional.ofNullable(requestEvent);
  }

  public String getErrorMessage() {
    return errorMessage;
  }

  public Integer getStatusCode() {
    return statusCode;
  }

  public MultiMap getHeaders() {
    return headers;
  }

  public Buffer getBody() {
    return body;
  }

  @Override
  public String toString() {
    return "RequestEventHandlerResult{" +
        "requestEvent=" + requestEvent +
        ", errorMessage='" + errorMessage + '\'' +
        ", statusCode=" + statusCode +
        ", headers=" + DataObjectsUtil.toString(headers) +
        ", body=" + body +
        '}';
  }
}