// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

/**
 * @class   vtkColorSeries
 * @brief   stores a list of colors.
 *
 *
 * The vtkColorSeries stores palettes of colors. There are several default
 * palettes (or schemes) available and functions to control several aspects
 * of what colors are returned. In essence a color scheme is set and then
 * the number of colors and individual color values may be requested.
 *
 * For a web page showcasing the default palettes, see:
 * <a
 * href="https://htmlpreview.github.io/?https://github.com/Kitware/vtk-examples/blob/gh-pages/VTKColorSeriesPatches.html">VTKColorSeriesPatches</a>;
 * <a
 * href="https://kitware.github.io/vtk-examples/site/Python/Visualization/ColorSeriesPatches/">ColorSeriesPatches</a>
 * was used to generate this table.
 *
 * It is also possible to add schemes beyond the default palettes.
 * Whenever \a SetColorScheme is called with a string for which no palette
 * already exists, a new, empty palette is created.
 * You may then use \a SetNumberOfColors and \a SetColor to populate the
 * palette.
 * You may not extend default palettes by calling functions that alter
 * a scheme; if called while a predefined palette is in use, they
 * will create a new non-default scheme and populate it with the current
 * palette before continuing.
 *
 * The "Brewer" palettes are courtesy of
 * Cynthia A. Brewer (Dept. of Geography, Pennsylvania State University)
 * and under the Apache License. See the source code for details.
 */

#ifndef vtkColorSeries_h
#define vtkColorSeries_h

#include "vtkColor.h"             // Needed for vtkColor[34]ub
#include "vtkCommonColorModule.h" // For export macro
#include "vtkObject.h"
#include "vtkStdString.h" // Needed for arguments

VTK_ABI_NAMESPACE_BEGIN
class vtkLookupTable;

class VTKCOMMONCOLOR_EXPORT vtkColorSeries : public vtkObject
{
public:
  vtkTypeMacro(vtkColorSeries, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Create a new vtkColorSeries with the SPECTRUM color scheme.
   */
  static vtkColorSeries* New();

  /**
   * Enum of the available color schemes
   */
  enum ColorSchemes
  {
    /// 7 different hues.
    SPECTRUM = 0,
    /// 6 warm colors (red to yellow).
    WARM,
    /// 7 cool colors (green to purple).
    COOL,
    /// 7 different blues.
    BLUES,
    /// 7 colors from blue to magenta.
    WILD_FLOWER,
    /// 6 colors from green to orange.
    CITRUS,
    /// purple-grey-orange diverging ColorBrewer scheme (11 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_11,
    /// purple-grey-orange diverging ColorBrewer scheme (10 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_10,
    /// purple-grey-orange diverging ColorBrewer scheme (9 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_9,
    /// purple-grey-orange diverging ColorBrewer scheme (8 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_8,
    /// purple-grey-orange diverging ColorBrewer scheme (7 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_7,
    /// purple-grey-orange diverging ColorBrewer scheme (6 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_6,
    /// purple-grey-orange diverging ColorBrewer scheme (5 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_5,
    /// purple-grey-orange diverging ColorBrewer scheme (4 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_4,
    /// purple-grey-orange diverging ColorBrewer scheme (3 colors)
    BREWER_DIVERGING_PURPLE_ORANGE_3,
    /// diverging spectral ColorBrewer scheme (11 colors)
    BREWER_DIVERGING_SPECTRAL_11,
    /// diverging spectral ColorBrewer scheme (10 colors)
    BREWER_DIVERGING_SPECTRAL_10,
    /// diverging spectral ColorBrewer scheme (9 colors)
    BREWER_DIVERGING_SPECTRAL_9,
    /// diverging spectral ColorBrewer scheme (8 colors)
    BREWER_DIVERGING_SPECTRAL_8,
    /// diverging spectral ColorBrewer scheme (7 colors)
    BREWER_DIVERGING_SPECTRAL_7,
    /// diverging spectral ColorBrewer scheme (6 colors)
    BREWER_DIVERGING_SPECTRAL_6,
    /// diverging spectral ColorBrewer scheme (5 colors)
    BREWER_DIVERGING_SPECTRAL_5,
    /// diverging spectral ColorBrewer scheme (4 colors)
    BREWER_DIVERGING_SPECTRAL_4,
    /// diverging spectral ColorBrewer scheme (3 colors)
    BREWER_DIVERGING_SPECTRAL_3,
    /// brown-blue-green diverging ColorBrewer scheme (11 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_11,
    /// brown-blue-green diverging ColorBrewer scheme (10 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_10,
    /// brown-blue-green diverging ColorBrewer scheme (9 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_9,
    /// brown-blue-green diverging ColorBrewer scheme (8 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_8,
    /// brown-blue-green diverging ColorBrewer scheme (7 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_7,
    /// brown-blue-green diverging ColorBrewer scheme (6 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_6,
    /// brown-blue-green diverging ColorBrewer scheme (5 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_5,
    /// brown-blue-green diverging ColorBrewer scheme (4 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_4,
    /// brown-blue-green diverging ColorBrewer scheme (3 colors)
    BREWER_DIVERGING_BROWN_BLUE_GREEN_3,
    /// blue to green sequential ColorBrewer scheme (9 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_9,
    /// blue to green sequential ColorBrewer scheme (8 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_8,
    /// blue to green sequential ColorBrewer scheme (7 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_7,
    /// blue to green sequential ColorBrewer scheme (6 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_6,
    /// blue to green sequential ColorBrewer scheme (5 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_5,
    /// blue to green sequential ColorBrewer scheme (4 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_4,
    /// blue to green sequential ColorBrewer scheme (3 colors)
    BREWER_SEQUENTIAL_BLUE_GREEN_3,
    /// yellow-orange-brown sequential ColorBrewer scheme (9 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_9,
    /// yellow-orange-brown sequential ColorBrewer scheme (8 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_8,
    /// yellow-orange-brown sequential ColorBrewer scheme (7 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_7,
    /// yellow-orange-brown sequential ColorBrewer scheme (6 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_6,
    /// yellow-orange-brown sequential ColorBrewer scheme (5 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_5,
    /// yellow-orange-brown sequential ColorBrewer scheme (4 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_4,
    /// yellow-orange-brown sequential ColorBrewer scheme (3 colors)
    BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_3,
    /// blue to purple sequential ColorBrewer scheme (9 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_9,
    /// blue to purple sequential ColorBrewer scheme (8 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_8,
    /// blue to purple sequential ColorBrewer scheme (7 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_7,
    /// blue to purple sequential ColorBrewer scheme (6 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_6,
    /// blue to purple sequential ColorBrewer scheme (5 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_5,
    /// blue to purple sequential ColorBrewer scheme (4 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_4,
    /// blue to purple sequential ColorBrewer scheme (3 colors)
    BREWER_SEQUENTIAL_BLUE_PURPLE_3,
    /// qualitative ColorBrewer scheme good for accenting
    BREWER_QUALITATIVE_ACCENT,
    /// a dark set of qualitative colors from ColorBrewer
    BREWER_QUALITATIVE_DARK2,
    /// a qualitative ColorBrewer scheme useful for color set members
    BREWER_QUALITATIVE_SET2,
    /// a qualitative ColorBrewer scheme composed of pastel colors
    BREWER_QUALITATIVE_PASTEL2,
    /// a qualitative ColorBrewer scheme composed of pastel colors
    BREWER_QUALITATIVE_PASTEL1,
    /// a qualitative ColorBrewer scheme useful for color set members
    BREWER_QUALITATIVE_SET1,
    /// a qualitative ColorBrewer scheme with pairs of matching colors
    BREWER_QUALITATIVE_PAIRED,
    /// a qualitative ColorBrewer scheme useful for color set members
    BREWER_QUALITATIVE_SET3,
    /// User specified color scheme.
    CUSTOM
  };

  /**
   * An enum defining how lookup tables should be used: either as a
   * list of discrete colors to choose from (categorical), or as an
   * ordered list of color set - points to interpolate among (ordinal).
   */
  enum LUTMode
  {
    /// indexed lookup is off
    ORDINAL = 0,
    /// indexed lookup is on
    CATEGORICAL
  };

  ///@{
  /**
   * Set the color scheme that should be used.
   * The variant of this function that takes an integer should pass a
   * number from those in the enum, or a value returned by the string variant.
   * The variant that accepts a string returns the integer index
   * of the resulting palette (whether it already existed or is newly-created).
   */
  virtual void SetColorScheme(int scheme);
  virtual int SetColorSchemeByName(const vtkStdString& schemeName);
  ///@}

  /**
   * Return the number of schemes currently defined.
   */
  int GetNumberOfColorSchemes() const;

  /**
   * Get the color scheme that is currently being used.
   */
  virtual vtkStdString GetColorSchemeName() const;

  /**
   * Set the name of the current color scheme
   */
  virtual void SetColorSchemeName(const vtkStdString& name);

  /**
   * Return the ID of the color scheme currently in use.
   */
  virtual int GetColorScheme() const;

  /**
   * Get the number of colors available in the current color scheme.
   */
  virtual int GetNumberOfColors() const;

  /**
   * Set the number of colors to be stored in a non-default color scheme.
   * Calling this function on a predefined color scheme will cause the scheme
   * to be duplicated to a new custom scheme.
   */
  virtual void SetNumberOfColors(int numColors);

  /**
   * Get the color at the specified index. If the index is out of range then
   * black will be returned.
   */
  vtkColor3ub GetColor(int index) const;

  /**
   * Get the color at the specified index. If the index is out of range then
   * the call wraps around, i.e. uses the mod operator.
   */
  vtkColor3ub GetColorRepeating(int index) const;

  /**
   * Set the color at the specified index. Does nothing if the index is out of
   * range.
   */
  virtual void SetColor(int index, const vtkColor3ub& color);

  /**
   * Adds the color to the end of the list.
   */
  virtual void AddColor(const vtkColor3ub& color);

  /**
   * Inserts the color at the specified index in the list.
   */
  virtual void InsertColor(int index, const vtkColor3ub& color);

  /**
   * Removes the color at the specified index in the list.
   */
  virtual void RemoveColor(int index);

  /**
   * Clears the list of colors.
   */
  virtual void ClearColors();

  /**
   * Make a deep copy of the supplied object.
   */
  virtual void DeepCopy(vtkColorSeries* chartColors);

  /**
   * Populate a lookup table with all the colors in the current scheme.

   * The default behavior is to return categorical data. Set lutIndexing
   * to ORDINAL to return ordinal data. Any other value for lutIndexing
   * is treated as CATEGORICAL.
   */
  void BuildLookupTable(vtkLookupTable* lkup, int lutIndexing = CATEGORICAL);

  /**
   * Create a new lookup table with all the colors in the current scheme.

   * The caller is responsible for deleting the table after use.

   * The default behavior is to return categorical data. Set lutIndexing
   * to ORDINAL to return ordinal data. Any other value for lutIndexing
   * is treated as CATEGORICAL.
   */
  VTK_NEWINSTANCE
  vtkLookupTable* CreateLookupTable(int lutIndexing = CATEGORICAL);

protected:
  vtkColorSeries();
  ~vtkColorSeries() override;

  /**
   * If the current scheme is a predefined (read-only) scheme,
   * copy the current colors to a new scheme and modify the new scheme instead.
   */
  virtual void CopyOnWrite();

  ///@{
  /**
   * Private data pointer of the class, stores the color list.
   */
  class Private;
  Private* Storage;
  ///@}

  /**
   * The color scheme being used.
   */
  int ColorScheme;

  /// The color scheme being used.
  vtkStdString ColorSchemeName;

private:
  vtkColorSeries(const vtkColorSeries&) = delete;
  void operator=(const vtkColorSeries&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif // vtkColorSeries_h