import vtkPiecewiseFunction from './../../Common/DataModel/PiecewiseFunction';
import { vtkObject } from './../../interfaces';
import { Extent, Nullable } from './../../types';
import vtkColorTransferFunction from './ColorTransferFunction';
import { ColorMixPreset, InterpolationType, OpacityMode } from './VolumeProperty/Constants';

export interface IVolumePropertyInitialValues {
  independentComponents?: boolean;
  shade?: boolean;
  ambient?: number;
  diffuse?: number;
  specular?: number;
  specularPower?: number;
  useLabelOutline?: boolean;
  labelOutlineThickness?: number | number[];
  colorMixPreset?: ColorMixPreset;
}

export interface vtkVolumeProperty extends vtkObject {
  /**
   * Get the ambient lighting coefficient.
   */
  getAmbient(): number;

  /**
   * Return the `Modified Time` which is a monotonic increasing integer
   * global for all vtkObjects.
   *
   * This allow to solve a question such as:
   *  - Is that object created/modified after another one?
   *  - Do I need to re-execute this filter, or not? ...
   *
   * @return {Number} the global modified time.
   */
  getMTime(): number;

  /**
   *
   * @param {Number} index
   */
  getColorChannels(index: number): number;

  /**
   * Get the diffuse lighting coefficient.
   */
  getDiffuse(): number;

  /**
   *
   * @param {Number} index
   */
  getGradientOpacityMaximumOpacity(index: number): number;

  /**
   *
   * @param {Number} index
   */
  getGradientOpacityMaximumValue(index: number): number;

  /**
   *
   * @param {Number} index
   */
  getGradientOpacityMinimumOpacity(index: number): number;

  /**
   *
   * @param {Number} index
   */
  getGradientOpacityMinimumValue(index: number): number;

  /**
   *
   */
  getColorMixPreset(): ColorMixPreset;

  /**
   *
   */
  getIndependentComponents(): boolean;

  /**
   * Get the unit distance on which the scalar opacity transfer function is defined.
   * @param {Number} index
   */
  getScalarOpacityUnitDistance(index: number): number;

  /**
   * Get the currently set gray transfer function. Create one if none set.
   * @param {Number} index
   */
  getGrayTransferFunction(index: number): vtkPiecewiseFunction;

  /**
   *
   * @default FRACTIONAL
   */
  getOpacityMode(index: number): OpacityMode;

  /**
   * gets the label outline thickness
   */
  getLabelOutlineThickness(): number;

  /**
   * Get the currently set RGB transfer function. Create one if none set.
   * @param {Number} index
   */
  getRGBTransferFunction(index: number): vtkColorTransferFunction;

  /**
   * Get the scalar opacity transfer function. Create one if none set.
   * @param {Number} index
   */
  getScalarOpacity(index: number): vtkPiecewiseFunction;

  /**
   * Get the shading of a volume.
   */
  getShade(): boolean;

  /**
   *
   */
  getSpecular(): number;

  /**
   * Get the specular power.
   */
  getSpecularPower(): number;

  /**
   *
   * @param {Number} index
   */
  getUseGradientOpacity(index: number): boolean;

  /**
   * @see setForceNearestInterpolation
   * @param {Number} index
   */
  getForceNearestInterpolation(index: number): boolean;

  /**
   *
   */
  getUseLabelOutline(): boolean;

  /**
   * Set the ambient lighting coefficient.
   * @param {Number} ambient The ambient lighting coefficient.
   */
  setAmbient(ambient: number): boolean;

  /**
   * Set the diffuse lighting coefficient.
   * @param {Number} diffuse The diffuse lighting coefficient.
   */
  setDiffuse(diffuse: number): boolean;

  /**
   *
   * @param {Number} index
   * @param {Number} value
   */
  setGradientOpacityMaximumOpacity(index: number, value: number): boolean;

  /**
   *
   * @param {Number} index
   * @param {Number} value
   */
  setGradientOpacityMaximumValue(index: number, value: number): boolean;

  /**
   *
   * @param {Number} index
   * @param {Number} value
   */
  setGradientOpacityMinimumOpacity(index: number, value: number): boolean;

  /**
   *
   * @param {Number} index
   * @param {Number} value
   */
  setGradientOpacityMinimumValue(index: number, value: number): boolean;

  /**
   * Set the color of a volume to a gray transfer function
   * @param {Number} index
   * @param {vtkPiecewiseFunction} func
   */
  setGrayTransferFunction(index: number, func: vtkPiecewiseFunction): boolean;

  /**
   * Set the color mix code to a preset value
   * Defaults to ColorMixPreset.DEFAULT
   * See the test `testColorMix` for an example on how to use this preset.
   *
   * If set to `CUSTOM`, a tag `//VTK::CustomColorMix` is made available to the
   * user who can user shader replacements to put its own code. The given code
   * will be used to mix the colors from each component.
   * Each component is available as a rgba vec4: `comp0`, `comp1`...
   * There are other useful functions or variable available. To find them,
   * see `//VTK::CustomColorMix` tag in `vtkVolumeFS.glsl`.
   */
  setColorMixPreset(preset: ColorMixPreset): boolean;

  /**
   * Does the data have independent components, or do some define color only?
   * If IndependentComponents is On (the default) then each component will be
   * independently passed through a lookup table to determine RGBA, shaded.
   *
   * Some volume Mappers can handle 1 to 4 component unsigned char or unsigned
   * short data (see each mapper header file to determine functionality). If
   * IndependentComponents is Off, then you must have either 2 or 4 component
   * data. For 2 component data, the first is passed through the first color
   * transfer function and the second component is passed through the first
   * scalar opacity (and gradient opacity) transfer function. Normals will be
   * generated off of the second component. When using gradient based opacity
   * modulation, the gradients are computed off of the second component. For 4
   * component data, the first three will directly represent RGB (no lookup
   * table). The fourth component will be passed through the first scalar
   * opacity transfer function for opacity and first gradient opacity transfer
   * function for gradient based opacity modulation. Normals will be generated
   * from the fourth component. When using gradient based opacity modulation,
   * the gradients are computed off of the fourth component.
   * @param {Boolean} independentComponents
   */
  setIndependentComponents(independentComponents: boolean): boolean;

  /**
   * It will set the label outline thickness for the labelmaps. It can accept
   * a single number or an array of numbers. If a single number is provided,
   * it will be used for all the segments. If an array is provided, it indicates
   * the thickness for each segment index. For instance if you have a labelmap
   * with 3 segments (0: background 1: liver 2: tumor), you can set the thickness
   * to [2,4] to have a thicker outline for the tumor (thickness 4). It should be
   * noted that the thickness is in pixel and also the first array value will
   * control the default thickness for all labels when 0 or not specified.
   *
   * @param {Number | Number[]} labelOutlineThickness
   */
  setLabelOutlineThickness(labelOutlineThickness: number | number[]): boolean;

  /**
   *
   * @param {Number} index
   * @param {Number} value
   */
  setOpacityMode(index: number, value: number): boolean;

  /**
   * Set the unit distance on which the scalar opacity transfer function is
   * defined.
   * @param {Number} index
   * @param {Number} value
   */
  setScalarOpacityUnitDistance(index: number, value: number): boolean;

  /**
   * Set the shading of a volume.
   *
   * If shading is turned off, then the mapper for the volume will not perform
   * shading calculations. If shading is turned on, the mapper may perform
   * shading calculations - in some cases shading does not apply (for example,
   * in a maximum intensity projection) and therefore shading will not be
   * performed even if this flag is on. For a compositing type of mapper,
   * turning shading off is generally the same as setting ambient=1,
   * diffuse=0, specular=0. Shading can be independently turned on/off per
   * component.
   * @param {Boolean} shade
   */
  setShade(shade: boolean): boolean;

  /**
   *
   * @param {Number} specular
   */
  setSpecular(specular: number): boolean;

  /**
   * Set the specular power.
   * @param {Number} specularPower
   */
  setSpecularPower(specularPower: number): boolean;

  /**
   *
   * @param {Number} index
   * @param {Boolean} value
   */
  setUseGradientOpacity(index: number, value: boolean): boolean;

  /**
   *
   * @param {Boolean} useLabelOutline
   */
  setUseLabelOutline(useLabelOutline: boolean): boolean;

  /**
   * Set the color of a volume to an RGB transfer function
   * @param {Number} index
   * @param {vtkColorTransferFunction} func
   */
  setRGBTransferFunction(
    index: number,
    func?: Nullable<vtkColorTransferFunction>
  ): boolean;

  /**
   * Set the scalar opacity of a volume to a transfer function
   * @param {Number} index
   * @param {vtkPiecewiseFunction} func
   */
  setScalarOpacity(
    index: number,
    func?: Nullable<vtkPiecewiseFunction>
  ): boolean;

  /**
   * Set the scalar component weights.
   * @param {Number} index
   * @param {Number} value
   */
  setComponentWeight(index: number, value: number): boolean;

  /**
   * Force the nearest neighbor interpolation of one or more of the components
   * The interpolation for the rest of the volume is set using `setInterpolationType`
   * @see setInterpolationType
   * @param {Number} index
   * @param {Boolean} value
   */
  setForceNearestInterpolation(index: number, value: boolean): boolean;

  /**
   * Get the scalar component weights.
   * @param {Number} index
   */
  getComponentWeight(index: number): number;

  /**
   * Set the interpolation type for sampling a volume.
   * @param {InterpolationType} interpolationType
   */
  setInterpolationType(interpolationType: InterpolationType): boolean;

  /**
   * Set interpolation type to NEAREST
   */
  setInterpolationTypeToNearest(): boolean;

  /**
   * Set interpolation type to LINEAR
   */
  setInterpolationTypeToLinear(): boolean;

  /**
   * Set interpolation type to FAST_LINEAR
   */
  setInterpolationTypeToFastLinear(): boolean;

  /**
   * Get the interpolation type for sampling a volume.
   */
  getInterpolationType(): InterpolationType;

  /**
   * Get the interpolation type for sampling a volume as a string.
   */
  getInterpolationTypeAsString(): string;

  /**
   *
   */
  getAverageIPScalarRange(): Range;

  /**
   *
   */
  getAverageIPScalarRangeByReference(): Range;

  /**
   * Get the blending coefficient that interpolates between surface and volume rendering
   * @default 0.0
   */
  getVolumetricScatteringBlending(): number;

  /**
   * Get the global illumination reach of volume shadow
   * @default 0.0
   */
  getGlobalIlluminationReach(): number;

  /**
   * Get anisotropy of volume shadow scatter
   * @default 0.0
   */
  getAnisotropy(): number;

  /**
   * Get local ambient occlusion flag
   * @default false
   */
  getLocalAmbientOcclusion(): boolean;

  /**
   * Get kernel size for local ambient occlusion
   * @default 15
   */
  getLAOKernelSize(): number;

  /**
   * Get kernel radius for local ambient occlusion
   * @default 7
   */
  getLAOKernelRadius(): number;

  /**
   *
   * @param x
   * @param y
   */
  setAverageIPScalarRange(x: number, y: number): boolean;

  /**
   *
   * @param {Range} averageIPScalarRange
   */
  setAverageIPScalarRangeFrom(averageIPScalarRange: Range): boolean;

  /**
   * Set the normal computation to be dependent on the transfer function.
   * By default, the mapper relies on the scalar gradient for computing normals at sample locations
   * for lighting calculations. This is an approximation and can lead to inaccurate results.
   * When enabled, this property makes the mapper compute normals based on the accumulated opacity
   * at sample locations. This can generate a more accurate representation of edge structures in the
   * data but adds an overhead and drops frame rate.
   * @param computeNormalFromOpacity
   */
  setComputeNormalFromOpacity(computeNormalFromOpacity: boolean): boolean;

  /**
   * Set the blending coefficient that determines the interpolation between surface and volume rendering.
   * Default value of 0.0 means shadow effect is computed with phong model.
   * Value of 1.0 means shadow is created by volume occlusion.
   * @param volumeScatterBlendCoef
   */
  setVolumetricScatteringBlending(volumeScatterBlendCoef: number): void;

  /**
   * Set the global illumination reach of volume shadow. This function is only effective when volumeScatterBlendCoef is greater than 0.
   * Default value of 0.0 means only the neighboring voxel is considered when creating global shadow.
   * Value of 1.0 means the shadow ray traverses through the entire volume.
   * @param globalIlluminationReach
   */
  setGlobalIlluminationReach(globalIlluminationReach: number): void;

  /**
   * Set anisotropy of volume shadow scatter. This function is only effective when volumeScatterBlendCoef is greater than 0.
   * Default value of 0.0 means light scatters uniformly in all directions.
   * Value of -1.0 means light scatters backward, value of 1.0 means light scatters forward.
   * @param anisotropy
   */
  setAnisotropy(anisotropy: number): void;

  /**
   * Set whether to turn on local ambient occlusion (LAO). LAO is only effective if shading is on and volumeScatterBlendCoef is set to 0.
   * LAO effect is added to ambient lighting, so the ambient component of the actor needs to be great than 0.
   * @param localAmbientOcclusion
   */
  setLocalAmbientOcclusion(localAmbientOcclusion: boolean): void;

  /**
   * Set kernel size for local ambient occlusion. It specifies the number of rays that are randomly sampled in the hemisphere.
   * Value is clipped between 1 and 32.
   * @param LAOKernelSize
   */
  setLAOKernelSize(LAOKernelSize: number): void;

  /**
   * Set kernel radius for local ambient occlusion. It specifies the number of samples that are considered on each random ray.
   * Value must be greater than or equal to 1.
   * @param LAOKernelRadius
   */
  setLAOKernelRadius(LAOKernelRadius: number): void;

  /**
   * Informs the mapper to only update the specified extents at the next render.
   *
   * If there are zero extents, the mapper updates the entire volume texture.
   * Otherwise, the mapper will only update the texture by the specified extents
   * during the next render call.
   *
   * This array is cleared after a successful render.
   * @param extents
   */
  setUpdatedExtents(extents: Extent[]): boolean;

  /**
   * Retrieves the updated extents.
   *
   * This array is cleared after every successful render.
   */
  getUpdatedExtents(): Extent[];
}

/**
 * Method use to decorate a given object (publicAPI+model) with vtkVolumeProperty characteristics.
 *
 * @param publicAPI object on which methods will be bounds (public)
 * @param model object on which data structure will be bounds (protected)
 * @param {IVolumePropertyInitialValues} [initialValues] (default: {})
 */
export function extend(
  publicAPI: object,
  model: object,
  initialValues?: IVolumePropertyInitialValues
): void;

/**
 * Method use to create a new instance of vtkVolumeProperty
 */
export function newInstance(
  initialValues?: IVolumePropertyInitialValues
): vtkVolumeProperty;

/**
 * vtkVolumeProperty is used to represent common properties associated
 * with volume rendering. This includes properties for determining the type
 * of interpolation to use when sampling a volume, the color of a volume,
 * the scalar opacity of a volume, the gradient opacity of a volume, and the
 * shading parameters of a volume.

 * When the scalar opacity or the gradient opacity of a volume is not set,
 * then the function is defined to be a constant value of 1.0. When a
 * scalar and gradient opacity are both set simultaneously, then the opacity
 * is defined to be the product of the scalar opacity and gradient opacity
 * transfer functions.
 *
 * Most properties can be set per "component" for volume mappers that
 * support multiple independent components. If you are using 2 component
 * data as LV or 4 component data as RGBV (as specified in the mapper)
 * only the first scalar opacity and gradient opacity transfer functions
 * will be used (and all color functions will be ignored). Omitting the
 * index parameter on the Set/Get methods will access index = 0.
 *
 * When independent components is turned on, a separate feature (useful
 * for volume rendering labelmaps) is available.  By default all components
 * have an "opacityMode" of `FRACTIONAL`, which results in the usual
 * addition of that components scalar opacity function value to the final
 * opacity of the fragment.  By setting one or more components to have a
 * `PROPORTIONAL` "opacityMode" instead, the scalar opacity lookup value
 * for those components will not be used to adjust the fragment opacity,
 * but rather used to multiply the color of that fragment.  This kind of
 * rendering makes sense for labelmap components because the gradient of
 * those fields is meaningless and should not be used in opacity
 * computation.  At the same time, multiplying the color value by the
 * piecewise scalar opacity function value provides an opportunity to
 * design piecewise constant opacity functions (step functions) that can
 * highlight any subset of label values.
 *
 * vtkColorTransferFunction is a color mapping in RGB or HSV space that
 * uses piecewise hermite functions to allow interpolation that can be
 * piecewise constant, piecewise linear, or somewhere in-between
 * (a modified piecewise hermite function that squishes the function
 * according to a sharpness parameter). The function also allows for
 * the specification of the midpoint (the place where the function
 * reaches the average of the two bounding nodes) as a normalize distance
 * between nodes.
 *
 * See the description of class vtkPiecewiseFunction for an explanation of
 * midpoint and sharpness.
 *
 * @example
 * ```js
 * // create color and opacity transfer functions
 * const ctfun = vtkColorTransferFunction.newInstance();
 * ctfun.addRGBPoint(200.0, 1.0, 1.0, 1.0);
 * ctfun.addRGBPoint(2000.0, 0.0, 0.0, 0.0);
 * const ofun = vtkPiecewiseFunction.newInstance();
 * ofun.addPoint(200.0, 0.0);
 * ofun.addPoint(1200.0, 0.2);
 * ofun.addPoint(4000.0, 0.4);
 *
 * // set them on the property
 * volume.getProperty().setRGBTransferFunction(0, ctfun);
 * volume.getProperty().setScalarOpacity(0, ofun);
 * volume.getProperty().setScalarOpacityUnitDistance(0, 4.5);
 * volume.getProperty().setInterpolationTypeToLinear();
 * ```
 */
export declare const vtkVolumeProperty: {
  newInstance: typeof newInstance;
  extend: typeof extend;
  InterpolationType: typeof InterpolationType;
  OpacityMode: typeof OpacityMode;
};
export default vtkVolumeProperty;