/*
    * 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.chart;
  
  import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  import java.time.Instant;
  import java.time.format.DateTimeFormatter;
  import org.jfree.chart.axis.NumberTickUnit;
  
  /**
   * This class although implements Serializable is not implemented correctly to serialize. Since I do not intend to
   * serialize this, I will skip the proper implementation.
   *
   * @author zoly
   */
  @SuppressFBWarnings({"NFF_NON_FUNCTIONAL_FIELD", "SE_TRANSIENT_FIELD_NOT_RESTORED"})
  class TimestampTickUnitImpl extends NumberTickUnit {
  
    private static final long serialVersionUID = 0L;
    private final long[] timestamps;
    private final long stepMillis;
    private final transient DateTimeFormatter formatter;
  
    TimestampTickUnitImpl(final double size,
            final long[] timestamps, final long stepMillis, final DateTimeFormatter formatter) {
      super(size);
      this.timestamps = timestamps;
      this.formatter = formatter;
      this.stepMillis = stepMillis;
    }
  
    @Override
    public String valueToString(final double value) {
      int ival = (int) Math.round(value);
      long val;
      if (ival >= timestamps.length) {
        val = timestamps[timestamps.length - 1] + stepMillis * (ival - timestamps.length + 1);
      } else if (ival < 0) {
        val = timestamps[0] + ival * stepMillis;
      } else {
        val = timestamps[ival];
      }
      return formatter.format(Instant.ofEpochMilli(val));
    }
  
    @Override
    public int hashCode() {
      int hash = 7;
      hash = 89 * hash + java.util.Arrays.hashCode(this.timestamps);
      hash = 89 * hash + (int) (this.stepMillis ^ (this.stepMillis >>> 32));
      return 89 * hash + (this.formatter != null ? this.formatter.hashCode() : 0);
    }
  
    @Override
    public boolean equals(final Object obj) {
      if (obj == null) {
        return false;
      }
      if (getClass() != obj.getClass()) {
        return false;
      }
      final TimestampTickUnitImpl other = (TimestampTickUnitImpl) obj;
      if (!java.util.Arrays.equals(this.timestamps, other.timestamps)) {
        return false;
      }
      if (this.stepMillis != other.stepMillis) {
        return false;
      }
      return !(this.formatter != other.formatter
              && (this.formatter == null || !this.formatter.equals(other.formatter)));
   }
 
 }