/*
 * Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF 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
 *
 *       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 org.apache.hadoop.fs.swift.exceptions;

import org.apache.hadoop.fs.swift.util.HttpResponseUtils;
import org.apache.http.HttpResponse;

import java.io.IOException;
import java.net.URI;

/**
 * Exception raised when the HTTP code is invalid. The status code,
 * method name and operation URI are all in the response.
 */
public class SwiftInvalidResponseException extends SwiftConnectionException {

  public final int statusCode;
  public final String operation;
  public final URI uri;
  public final String body;

  public SwiftInvalidResponseException(String message,
                                       int statusCode,
                                       String operation,
                                       URI uri) {
    super(message);
    this.statusCode = statusCode;
    this.operation = operation;
    this.uri = uri;
    this.body = "";
  }

  public SwiftInvalidResponseException(String message,
                                       String operation,
                                       URI uri,
                                       HttpResponse resp) {
    super(message);
    this.statusCode = resp.getStatusLine().getStatusCode();
    this.operation = operation;
    this.uri = uri;
    String bodyAsString;
    try {
      bodyAsString = HttpResponseUtils.getResponseBodyAsString(resp);
      if (bodyAsString == null) {
        bodyAsString = "";
      }
    } catch (IOException e) {
      bodyAsString = "";
    }
    this.body = bodyAsString;
  }

  public int getStatusCode() {
    return statusCode;
  }

  public String getOperation() {
    return operation;
  }

  public URI getUri() {
    return uri;
  }

  public String getBody() {
    return body;
  }

  /**
   * Override point: title of an exception -this is used in the
   * toString() method.
   * @return the new exception title
   */
  public String exceptionTitle() {
    return "Invalid Response";
  }

  /**
   * Build a description that includes the exception title, the URI,
   * the message, the status code -and any body of the response
   * @return the string value for display
   */
  @Override
  public String toString() {
    StringBuilder msg = new StringBuilder();
    msg.append(exceptionTitle());
    msg.append(": ");
    msg.append(getMessage());
    msg.append("  ");
    msg.append(operation);
    msg.append(" ");
    msg.append(uri);
    msg.append(" => ");
    msg.append(statusCode);
    if (body != null && !body.isEmpty()) {
      msg.append(" : ");
      msg.append(body);
    }

    return msg.toString();
  }
}