//*****************************************************************************
// Copyright 2017-2020 Intel Corporation
//
// 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 "ngraph/autodiff/adjoints.hpp"
#include "ngraph/node.hpp"
#include "ngraph/op/util/fused_op.hpp"

namespace ngraph
{
    namespace op
    {
        namespace v0
        {
            /// \brief      Parameterized, bounded sigmoid-like, piecewise linear
            ///             function. min(max(alpha*x + beta, 0), 1)
            ///
            class NGRAPH_API HardSigmoid : public ngraph::op::util::FusedOp
            {
            public:
                static constexpr NodeTypeInfo type_info{"HardSigmoid", 0};
                const NodeTypeInfo& get_type_info() const override { return type_info; }
                HardSigmoid() = default;

                /// \brief      Constructs a HardSigmoid operation.
                ///
                /// \param      data   Input tensor.
                /// \param[in]  alpha  A scalar value representing the alpha parameter.
                /// \param[in]  beta   A scalar value representing the beta parameter.
                ///
                HardSigmoid(const Output<Node>& data,
                            const Output<Node>& alpha,
                            const Output<Node>& beta);

                bool visit_attributes(AttributeVisitor& visitor) override;
                virtual void pre_validate_and_infer_types() override;
                virtual NodeVector decompose_op() const override;
                virtual std::shared_ptr<Node>
                    clone_with_new_inputs(const OutputVector& new_args) const override;
            };
        }
        using v0::HardSigmoid;
    }
}
