#pragma once

#include <cstddef>
#include <cstdint>
#include <filesystem>
#include <string>
#include <vector>

namespace XC3DGSD3D12 {

struct Float3 {
    float x = 0.0f;
    float y = 0.0f;
    float z = 0.0f;
};

struct GaussianSplatRuntimeData {
    static constexpr uint32_t kColorTextureWidth = 2048;
    static constexpr uint32_t kPositionStride = sizeof(float) * 3;
    static constexpr uint32_t kOtherStride = sizeof(uint32_t) + sizeof(float) * 3;
    static constexpr uint32_t kColorStride = sizeof(float) * 4;
    static constexpr uint32_t kShCoefficientCount = 15;
    static constexpr uint32_t kShStride = sizeof(float) * 3 * 16;

    uint32_t splatCount = 0;
    uint32_t colorTextureWidth = kColorTextureWidth;
    uint32_t colorTextureHeight = 0;
    Float3 boundsMin = {};
    Float3 boundsMax = {};
    std::vector<std::byte> positionData;
    std::vector<std::byte> otherData;
    std::vector<std::byte> colorData;
    std::vector<std::byte> shData;
};

bool LoadGaussianSceneFromPly(
    const std::filesystem::path& filePath,
    GaussianSplatRuntimeData& outData,
    std::string& outErrorMessage);

bool WriteGaussianSceneSummary(
    const std::filesystem::path& filePath,
    const GaussianSplatRuntimeData& data,
    std::string& outErrorMessage);

} // namespace XC3DGSD3D12