/*
    * Copyright 2017 the original author or authors.
    *
    * 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 org.bremersee.dccon.repository.cli;
  
  import java.io.Serializable;
  import java.util.StringTokenizer;
  import lombok.AllArgsConstructor;
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  import lombok.ToString;
  import org.springframework.util.StringUtils;
  
  /**
   * The command executor response.
   *
   * @author Christian Bremer
   */
  @Getter
  @ToString
  @EqualsAndHashCode
  @AllArgsConstructor
  @SuppressWarnings("WeakerAccess")
  public class CommandExecutorResponse implements Serializable {
  
    /**
     * Return {@link #toOneLine()} if response is not {@code null}.
     *
     * @param response the response (can be {@code null})
     * @return the response in one line
     */
    public static String toExceptionMessage(CommandExecutorResponse response) {
      return response == null ? "" : response.toOneLine();
    }
  
    private String stdout;
  
    private String stderr;
  
    /**
     * Check whether stdout has text or not.
     *
     * @return {@code true} if stdout has text, otherwise {@code false}
     */
    @SuppressWarnings("unused")
    public boolean stdoutHasText() {
      return hasText(stdout);
    }
  
    /**
     * Check whether stderr has text or not.
     *
     * @return {@code true} if stderr has text, otherwise {@code false}
     */
    @SuppressWarnings("unused")
    public boolean stderrHasText() {
      return hasText(stderr);
    }
  
    private boolean hasText(String value) {
      return value != null && value.trim().length() > 0;
    }
  
    /**
     * Returns stdout and stderr in one line.
     *
     * @return the line
     */
    public String toOneLine() {
      final String out = stdoutToOneLine();
      final String err = stderrToOneLine();
      final StringBuilder sb = new StringBuilder();
      if (StringUtils.hasText(out)) {
        sb.append("stdout=[").append(out).append("]");
        if (StringUtils.hasText(err)) {
          sb.append(" ");
        }
      }
      if (StringUtils.hasText(err)) {
        sb.append("stderr=[").append(err).append("]");
      }
      return sb.toString();
    }
  
    private String toOneLine(String value) {
  
     if (!hasText(value)) {
       return "";
     }
     StringBuilder sb = new StringBuilder();
     StringTokenizer tokenizer = new StringTokenizer(value.trim(), "\n\r\f");
     int n = 0;
     while (tokenizer.hasMoreTokens()) {
       if (n > 0) {
         sb.append(" | ");
       }
       sb.append(tokenizer.nextToken().trim());
       n++;
     }
     return sb.toString();
   }
 
   /**
    * Stdout to one line.
    *
    * @return the line
    */
   public String stdoutToOneLine() {
     return toOneLine(stdout);
   }
 
   /**
    * Stderr to one line.
    *
    * @return the line
    */
   public String stderrToOneLine() {
     return toOneLine(stderr);
   }
 
 }