/*
    * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
    *
    * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
   *
   * Additionally licensed with:
   *
   * 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.spf4j.perf.impl;
  
  import java.io.Serializable;
  import javax.annotation.Nonnull;
  import javax.annotation.concurrent.Immutable;
  
  /**
   * this class ordering is based on start Interval ordering
   */
  @Immutable
  public final class Quanta implements Comparable<Quanta>, Serializable {
  
      private static final long serialVersionUID = 1L;
  
      private final long intervalStart;
      private final long intervalEnd;
  
      public Quanta(final long intervalStart, final long intervalEnd) {
          this.intervalStart = intervalStart;
          this.intervalEnd = intervalEnd;
      }
  
      public Quanta(@Nonnull final String stringVariant) {
          int undLocation = stringVariant.indexOf('_');
          if (undLocation < 0) {
              throw new IllegalArgumentException("Invalid Quanta DataSource " + stringVariant);
          }
          String startStr = stringVariant.substring(1, undLocation);
          String endStr = stringVariant.substring(undLocation + 1);
          if ("NI".equals(startStr)) {
              this.intervalStart = Long.MIN_VALUE;
          } else {
              this.intervalStart = Long.parseLong(startStr);
          }
          if ("PI".equals(endStr)) {
              this.intervalEnd = Long.MAX_VALUE;
          } else {
              this.intervalEnd = Long.parseLong(endStr);
          }
      }
  
      public long getIntervalEnd() {
          return intervalEnd;
      }
  
      public long getIntervalStart() {
          return intervalStart;
      }
  
      public long getClosestToZero() {
          return (intervalStart < 0) ? intervalEnd : intervalStart;
      }
  
      @Override
      public String toString() {
          StringBuilder result = new StringBuilder(16);
          result.append('Q');
          if (intervalStart == Long.MIN_VALUE) {
              result.append("NI");
          } else {
              result.append(intervalStart);
          }
          result.append('_');
          if (intervalEnd == Long.MAX_VALUE) {
              result.append("PI");
          } else {
              result.append(intervalEnd);
          }
         return result.toString();
     }
 
     @Override
     public int compareTo(final Quanta o) {
         if (this.intervalStart < o.intervalStart) {
             return -1;
         } else if (this.intervalStart > o.intervalStart) {
             return 1;
         } else {
             if (this.intervalEnd < o.intervalEnd) {
                 return -1;
             } else if (this.intervalEnd > o.intervalEnd) {
                 return 1;
             } else {
                 return 0;
             }
         }
     }
 
     @Override
     public int hashCode() {
         int hash = 7;
         hash = 89 * hash + (int) (this.intervalStart ^ (this.intervalStart >>> 32));
         return 89 * hash + (int) (this.intervalEnd ^ (this.intervalEnd >>> 32));
     }
 
     @Override
     public boolean equals(final Object obj) {
         if (obj == null) {
             return false;
         }
         if (getClass() != obj.getClass()) {
             return false;
         }
         final Quanta other = (Quanta) obj;
         return this.compareTo(other) == 0;
     }
 
 }