// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "raf/Defs.h"

#include <cstdint>

namespace raf {

/**
    @brief Write-only accessors for vertex and joint region affiliation.
*/
class RAFAPI VertexRegionAffiliationWriter {
    protected:
        virtual ~VertexRegionAffiliationWriter();

    public:
        /**
            @brief List of region indices.
            @param meshIndex
                A mesh's position in the zero-indexed array of meshes.
            @param vertexIndex
                A vertex's position in the zero-indexed array of meshes.
            @param regionIndices
                The source address from which the region indices are to be copied.
            @param count
                The number of regions that affiliate with vertexIndex.
            @note
                The mesh storage will be implicitly resized (if needed) to provide
                storage for the number of meshes that is inferred from the specified index.
        */
        virtual void setVertexRegionIndices(std::uint16_t meshIndex,
                                            std::uint32_t vertexIndex,
                                            const std::uint16_t* regionIndices,
                                            std::uint16_t count) = 0;
        /**
            @brief List of vertex region affiliations.
            @param meshIndex
                A mesh's position in the zero-indexed array of meshes.
            @param vertexIndex
                A vertex's position in the zero-indexed array of meshes.
            @param regionAffiliationValues
                The source address from which the region affiliations are to be copied.
            @param count
                The number of regions that affiliate with vertexIndex.
            @note
                The mesh storage will be implicitly resized (if needed) to provide
                storage for the number of meshes that is inferred from the specified index.
        */
        virtual void setVertexRegionAffiliation(std::uint16_t meshIndex,
                                                std::uint32_t vertexIndex,
                                                const float* regionAffiliationValues,
                                                std::uint16_t count) = 0;
        /**
           @brief Clears all vertex region affiliations and indices.
       */
        virtual void clearVertexAffiliations() = 0;
        /**
            @brief Clears all region affiliations and indices of vertices in specified mesh.
            @param meshIndex
                A mesh's position in the zero-indexed array of meshes.
        */
        virtual void clearVertexAffiliations(std::uint16_t meshIndex) = 0;
        /**
            @brief Deletes vertex region affiliations and indices.
            @param meshIndex
                A mesh's position in the zero-indexed array of meshes.
            @param vertexIndex
                A vertex's position in the zero-indexed array of meshes.
         */
        virtual void deleteVertexAffiliation(std::uint16_t meshIndex, std::uint32_t vertexIndex) = 0;

};

}  // namespace raf