/*
 *  ******************************************************************************
 *  *
 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * 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.
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 *  * SPDX-License-Identifier: Apache-2.0
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package org.nd4j.linalg.api.ops.impl.scalar;

import java.util.List;
import java.util.Map;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseScalarOp;
import org.nd4j.linalg.api.ops.impl.transforms.gradient.LeakyReLUBp;
import org.nd4j.linalg.factory.Nd4j;
import org.tensorflow.framework.AttrValue;
import org.tensorflow.framework.GraphDef;
import org.tensorflow.framework.NodeDef;

public class LeakyReLU extends BaseScalarOp {
    public static final double DEFAULT_ALPHA = 0.01;
    private double alpha = DEFAULT_ALPHA;



    public LeakyReLU(SameDiff sameDiff, SDVariable i_v, boolean inPlace, double alpha) {
        super(sameDiff, i_v, alpha, inPlace);
        this.alpha = alpha;
        this.extraArgs = new Object[]{alpha};

    }

    public LeakyReLU(SameDiff sameDiff, SDVariable i_v, double alpha) {
        this(sameDiff, i_v, false, alpha);
    }

    public LeakyReLU(SameDiff sameDiff, SDVariable i_v, Object[] extraArgs, double alpha) {
        super(sameDiff, i_v, alpha, extraArgs);
        this.alpha = alpha;
        this.extraArgs = new Object[]{alpha};
    }

    public LeakyReLU() {
        super();
    }

    public LeakyReLU(INDArray x, double alpha) {
        super(x, alpha);
        this.alpha = alpha;
        this.extraArgs = new Object[]{alpha};
    }

    public LeakyReLU(INDArray x, INDArray z, double alpha) {
        super(x, null, z, alpha);
        this.alpha = alpha;
        this.extraArgs = new Object[]{alpha};
    }


    public LeakyReLU(INDArray x, INDArray z) {
        this(x, z, 0.01);
    }

    public LeakyReLU(INDArray x) {
        super(x, 0.01);
    }

    @Override
    public int opNum() {
        return 35;
    }

    @Override
    public String opName() {
        return "leakyrelu";
    }

    @Override
    public String onnxName() {
        return "LeakyRelu";
    }

    @Override
    public String tensorflowName() {
        return "LeakyRelu";
    }

    @Override
    public void setPropertiesForFunction(Map<String, Object> properties) {
        super.setPropertiesForFunction(properties);
    }


    public LeakyReLU(SameDiff sameDiff, SDVariable i_v, Number scalar) {
        super(sameDiff, i_v, scalar);
    }

    @Override
    public List<SDVariable> doDiff(List<SDVariable> i_v) {
        return new LeakyReLUBp(sameDiff, arg(), i_v.get(0), alpha).outputs();
    }

    @Override
    public void initFromTensorFlow(NodeDef nodeDef, SameDiff initWith, Map<String, AttrValue> attributesForNode,
            GraphDef graph) {
        alpha = attributesForNode.get("alpha").getF();
        extraArgs = new Object[]{alpha};
        this.setScalar(Nd4j.scalar(org.nd4j.linalg.api.buffer.DataType.FLOAT, alpha));
    }
}
