// Copyright (C) 2018-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//

#pragma once

#include <ie_blob.h>
#include <ie_layers.h>

#include <map>
#include <memory>
#include <string>
#include <vector>

namespace InferenceEngine {
namespace ShapeInfer {

/**
 *@brief Implementation of Const inference for TBD layer
 */
class DivConstInfer : public ConstInferImpl {
public:
    explicit DivConstInfer(const std::string& type): ConstInferImpl(type) {}

    void inferImpl(const std::vector<Blob::CPtr>& inData, const std::map<std::string, std::string>& params,
                   const std::map<std::string, Blob::Ptr>& blobs, std::vector<Blob::Ptr>& outData) override {
        size_t numInputs = inData.size();
        if (inData.size() != 2)
            THROW_IE_EXCEPTION << "Unsupported number of inputs: " << numInputs << ". 2 inputs is supported";
        auto* firstBlobBuffer = inData[0]->cbuffer().as<float*>();
        auto* secondBlobBuffer = inData[1]->cbuffer().as<float*>();

        if (!firstBlobBuffer || !secondBlobBuffer) {
            THROW_IE_EXCEPTION << "empty input data";
        }
        auto outBlob = *outData.begin();
        auto* outBuffer = outBlob->buffer().as<float*>();
        if (!outBuffer) THROW_IE_EXCEPTION << "empty output data";
        if (inData[0]->size() != inData[1]->size()) {
            THROW_IE_EXCEPTION << "inputs with different shapes are not supported";
        }
        for (int i = 0; i < outBlob->size(); i++) {
            if (secondBlobBuffer[i] == 0) THROW_IE_EXCEPTION << "division by zero";
            outBuffer[i] = firstBlobBuffer[i] / secondBlobBuffer[i];
        }
    }
};

}  // namespace ShapeInfer
}  // namespace InferenceEngine
