/*
 * SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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/batch_manager/common.h"
#include "tensorrt_llm/batch_manager/runtimeBuffers.h"
#include "tensorrt_llm/batch_manager/trtGptModelOptionalParams.h"
#include "tensorrt_llm/common/algorithm.h"
#include "tensorrt_llm/runtime/common.h"
#include "tensorrt_llm/runtime/modelConfig.h"
#include "tensorrt_llm/runtime/request.h"
#include "tensorrt_llm/runtime/samplingConfig.h"
#include "tensorrt_llm/runtime/tllmRuntime.h"
#include "tensorrt_llm/runtime/worldConfig.h"

namespace tensorrt_llm::batch_manager
{

namespace tr = tensorrt_llm::runtime;
namespace tle = tensorrt_llm::executor;

class GenerateRequestOptions : Algorithm
{
public:
    constexpr static auto name{"GenerateRequestOptions"};

    using SizeType32 = tr::SizeType32;
    using ITensor = tr::ITensor;
    using TensorPtr = tr::ITensor::SharedPtr;

    GenerateRequestOptions(bool speculativeDecodingFastLogits, bool isLeaderInOrchMode, bool isNormalizeLogProbs)
        : mSpeculativeDecodingFastLogits(speculativeDecodingFastLogits)
        , mIsLeaderInOrchMode(isLeaderInOrchMode)
        , mIsNormalizeLogProbs(isNormalizeLogProbs)
    {
    }

    std::tuple<std::vector<SizeType32>, std::vector<tr::decoder_batch::Request>, std::vector<tr::SamplingConfig>>
    operator()(tr::ModelConfig const& modelConfig, tr::WorldConfig const& worldConfig,
        executor::DecodingConfig const& decodingConfig, runtime::TllmRuntime const& runtime,
        RequestVector const& contextRequests, RuntimeBuffers& buffers, TensorPtr& decoderInputsIds) const;

private:
    std::shared_ptr<runtime::ITensor> retrieveDraftLogits(tr::ModelConfig const& modelConfig,
        tr::WorldConfig const& worldConfig, std::shared_ptr<runtime::ITensor> tensor,
        runtime::TllmRuntime const& runtime) const;

    /// @brief Retrieve the embedding bias from the request. This potentially makes a copy of the tensor
    /// to the appropriate type if the input tensor does not match it.
    TensorPtr getEmbeddingBias(runtime::TllmRuntime const& runtime, TensorPtr const& tensor) const;

    std::optional<TensorPtr> targetModelReceiveLogits(
        executor::SpeculativeDecodingFastLogitsInfo const& fastLogitsInfo, runtime::TllmRuntime const& runtime) const;

    bool mSpeculativeDecodingFastLogits;
    bool mIsLeaderInOrchMode;
    bool mIsNormalizeLogProbs;
};

} // namespace tensorrt_llm::batch_manager