/*
 * Copyright (c) 2019-2023, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "tensorrt_llm/runtime/bufferManager.h"
#include "tensorrt_llm/runtime/common.h"
#include "tensorrt_llm/runtime/cudaStream.h"
#include "tensorrt_llm/runtime/iTensor.h"

namespace tensorrt_llm::runtime::kernels
{

using TensorPtr = runtime::ITensor::SharedPtr;

template <typename T>
void invokeFill(IBuffer& buffer, T value, CudaStream const& stream);

template <typename T>
void invokeFillBatch(
    IBuffer& buffer, IBuffer const& indices, std::size_t stride, IBuffer const& values, CudaStream const& stream);

void invokeCopyBatch(IBuffer const& srcBuffer, IBuffer& dstBuffer, IBuffer const& srcOffsets, IBuffer const& dstOffsets,
    IBuffer const& sizes, std::size_t maxStride, CudaStream const& stream);

template <typename T>
void invokeAdd(IBuffer& buffer, T value, CudaStream const& stream);

void reduce(IBuffer& output, IBuffer const& input, CudaStream const& stream);

void invokeTranspose(ITensor& output, ITensor const& input, CudaStream const& stream);

void invokeTransposeWithOutputOffset(
    ITensor& output, ITensor const& input, SizeType outputOffset, CudaStream const& stream);

void invokeTransposeWithInputOffset(
    ITensor& output, ITensor const& input, SizeType inputOffset, CudaStream const& stream);

void invokeInclusiveSum(IBuffer& output, IBuffer const& input, BufferManager const& manager, CudaStream const& stream);

void invokeInclusiveSum(IBuffer& output, IBuffer& tmpBuffer, IBuffer const& input, CudaStream const& stream);

void invokeBuildTokenMask(
    ITensor& tokenMask, ITensor const& inputLengths, SizeType maxInputLength, CudaStream const& stream);

void invokeBuildAttentionMask(ITensor& attentionMask, SizeType padId, CudaStream const& stream);

void invokeExtendAttentionMask(ITensor& newMask, ITensor const& oldMask, CudaStream const& stream);

void invokeCopyInputToOutputTransposed(
    ITensor& outputIds, ITensor const& inputIds, ITensor const& inputLengths, SizeType padId, CudaStream const& stream);

void invokeCopyPackedInputToOutputTransposed(ITensor& outputIds, ITensor const& inputIds, ITensor const& inputOffsets,
    SizeType maxInputLength, SizeType padId, CudaStream const& stream);

void invokeCopyInputToOutput(
    ITensor& outputIds, ITensor const& inputIds, ITensor const& inputLengths, SizeType padId, CudaStream const& stream);

void invokeCopyPackedInputToOutput(ITensor& outputIds, ITensor const& inputIds, ITensor const& inputOffsets,
    SizeType maxInputLength, SizeType padId, CudaStream const& stream);

void initOutputIds(ITensor& outputIds, ITensor const& inputIds, ITensor const& inputLengths,
    ITensor const& inputOffsets, TokenIdType padId, TokenIdType endId, SizeType maxInputLength, bool inputPacked,
    CudaStream const& stream);

void scatterTensor(ITensor& output, ITensor const& input, SizeType beamWidth, CudaStream const& stream);

void splitTransposed(ITensor& output, ITensor const& input, SizeType split, CudaStream const& stream);

void tileTensor(ITensor& output, ITensor const& input, SizeType beamWidth, CudaStream const& stream);

void tileTensorInplace(ITensor& tensor, SizeType beamWidth, CudaStream const& stream);

void gatherLastTokenLogits(
    ITensor& output, ITensor const& input, ITensor const& lastTokenIds, CudaStream const& stream);

void copyLatestTokenLogitsInGeneration(ITensor& output, ITensor const& input, SizeType step, SizeType firstBatchSlotIdx,
    SizeType microBatchSize, SizeType beamWidth, CudaStream const& stream);

void mergeLogitsFragments(BufferManager const& bufferManager, ITensor& output, std::vector<TensorPtr> inputVector,
    ITensor& cachePointerDevice, ITensor& cachePointerHost, SizeType firstBatchSlotIdx, SizeType const microBatchSize,
    SizeType const beamWidth, CudaStream const& stream, int stepOffset);

void invokeUpdateKVBlockArrayDraftTokenLocation(ITensor const& seqAcceptedDraftTokenOffsets,
    ITensor const& packedAcceptedDraftTokensIndices, ITensor const& pastKeyValueLengths, int64_t* const* pointerArray,
    SizeType layerCount, SizeType seqCount, SizeType numKVHeads, SizeType sizeInBytesPerKVHead,
    SizeType rewindDraftTokenCommonCount, int* rewindDraftTokenSeparateAdjustments, ITensor const& seqSlotRemapping,
    SizeType maxKVCacheLen, SizeType maxBlocksPerSeq, SizeType tokensPerBlock, cudaStream_t stream);
} // namespace tensorrt_llm::runtime::kernels