/*============================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.

Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.

============================================================================*/
#include "mitkColorConversions.h"
#include <mitkColorSequenceCycleH.h>

namespace mitk
{
  ColorSequenceCycleH::ColorSequenceCycleH()
  {
    color_h = -60.0; // after the first increase this will yield red
    color_s = 1.0;   // full saturation
    color_v = 1.0;   // full value
    color_cycle = 0;
  }

  ColorSequenceCycleH::~ColorSequenceCycleH()
  {
    // nothing to do
  }

  Color ColorSequenceCycleH::GetNextColor()
  {
    color_h += 60.0;
    if (color_h < 0.0)
      color_h = 0.0;

    if (color_h >= 360.0)
    {
      if (color_cycle == 0)
      {
        color_h = 30.0;
        color_s = 1.0;
        color_v = 1.0;
        color_cycle = 1;
      }
      else if (color_cycle == 1)
      {
        color_h = 0.0;
        color_s = 0.5;
        color_v = 1.0;
        color_cycle = 2;
      }
      else if (color_cycle == 2)
      {
        color_h = 30.0;
        color_s = 0.5;
        color_v = 1.0;
        color_cycle = 3;
      }
      else if (color_cycle == 3)
      {
        color_h = 0.0;
        color_s = 1.0;
        color_v = 0.5;
        color_cycle = 4;
      }
      else if (color_cycle == 4)
      {
        color_h = 30.0;
        color_s = 1.0;
        color_v = 0.5;
        color_cycle = 5;
      }
      else if (color_cycle == 5)
      {
        color_h = 0.0;
        color_s = 1.0;
        color_v = 1.0;
        color_cycle = 0;
      }
    }

    // convert to rgb
    float r, g, b;
    ColorConversions::Hsv2Rgb(color_h, color_s, color_v, r, g, b);

    Color returnColor;
    returnColor.Set(r, g, b);

    return returnColor;
  }

  void ColorSequenceCycleH::GoToBegin()
  {
    color_h = -60.0; // after the first increase this will yield red
    color_s = 1.0;   // full saturation
    color_v = 1.0;   // full value
    color_cycle = 0;
  }

  void ColorSequenceCycleH::ChangeHueValueByCycleSteps(int steps) { color_h += (float)(steps * 60.0); }
  void ColorSequenceCycleH::ChangeHueValueByAbsoluteNumber(float number) { color_h += number; }
  void ColorSequenceCycleH::SetColorCycle(unsigned short cycle)
  {
    if (cycle > 5)
      cycle = 5;
    color_cycle = cycle;
    color_h = 360.0;
    this->GetNextColor();
  }

} // mitk
