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package org.deeplearning4j.arbiter.conf.updater;

import lombok.Data;
import lombok.EqualsAndHashCode;
import org.deeplearning4j.arbiter.optimize.api.ParameterSpace;
import org.nd4j.linalg.learning.config.IUpdater;
import org.nd4j.linalg.learning.config.RmsProp;
import org.nd4j.linalg.schedule.ISchedule;
import org.nd4j.shade.jackson.annotation.JsonProperty;

@Data
@EqualsAndHashCode(callSuper = false)
public class RmsPropSpace extends BaseUpdaterSpace {

    protected ParameterSpace learningRate;
    protected ParameterSpace learningRateSchedule;

    public RmsPropSpace(ParameterSpace learningRate) {
        this(learningRate, null);
    }

    public RmsPropSpace(@JsonProperty("learningRate") ParameterSpace learningRate,
                        @JsonProperty("learningRateSchedule") ParameterSpace learningRateSchedule){
        this.learningRate = learningRate;
        this.learningRateSchedule = learningRateSchedule;
    }

    @Override
    public IUpdater getValue(double[] parameterValues) {
        double lr = learningRate == null ? RmsProp.DEFAULT_RMSPROP_LEARNING_RATE : learningRate.getValue(parameterValues);
        ISchedule lrS = learningRateSchedule == null ? null : learningRateSchedule.getValue(parameterValues);
        if(lrS == null){
            return new RmsProp(lr);
        } else {
            return new RmsProp(lrS);
        }
    }
}