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/* ******************************************************************************
 * Copyright (c) 2019 Konduit K.K.
 *
 * 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.
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/
package org.nd4j.linalg.api.ops.custom;

import lombok.NonNull;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;

import java.util.Collections;
import java.util.List;

public class AdjustHue extends DynamicCustomOp {
    public AdjustHue() {}

    public AdjustHue(@NonNull INDArray in, double delta, INDArray out) {
        this(in, delta);
        if (out != null) {
            outputArguments.add(out);
        }
    }

    public AdjustHue(@NonNull INDArray in, double delta) {
        Preconditions.checkArgument(in.rank() >= 3,
                "AdjustSaturation: op expects rank of input array to be >= 3, but got %s instead", in.rank());
        Preconditions.checkArgument(-1.0 <= delta && delta <= 1.0, "AdjustHue: parameter delta must be within [-1, 1] interval," +
                " but got %s instead", delta);
        inputArguments.add(in);

        addTArgument(delta);
    }

    public AdjustHue(@NonNull SameDiff sameDiff, @NonNull SDVariable in, @NonNull SDVariable factor) {
        super(sameDiff,new SDVariable[]{in,factor});
    }

    public AdjustHue(@NonNull SameDiff sameDiff, @NonNull SDVariable in, double factor) {
        super(sameDiff,new SDVariable[]{in});
        addTArgument(factor);
    }

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

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

    @Override
    public List calculateOutputDataTypes(List inputDataTypes){
        int n = args().length;
        Preconditions.checkState(inputDataTypes != null && inputDataTypes.size() == n, "Expected %s input data types for %s, got %s", n, getClass(), inputDataTypes);
        return Collections.singletonList(inputDataTypes.get(0));
    }
}