/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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.
 *  *
 *  * SPDX-License-Identifier: Apache-2.0
 *  *****************************************************************************
 */

package org.nd4j.evaluation.curves;

import org.nd4j.serde.json.JsonMappers;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.core.JsonProcessingException;

import java.io.IOException;

@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY)
public abstract class BaseHistogram {

    public abstract String getTitle();

    public abstract int numPoints();

    public abstract int[] getBinCounts();

    public abstract double[] getBinLowerBounds();

    public abstract double[] getBinUpperBounds();

    public abstract double[] getBinMidValues();


    /**
     * @return  JSON representation of the curve
     */
    public String toJson() {
        try {
            return JsonMappers.getMapper().writeValueAsString(this);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @return YAML  representation of the curve
     */
    public String toYaml() {
        try {
            return JsonMappers.getYamlMapper().writeValueAsString(this);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     *
     * @param json       JSON representation
     * @param curveClass Class for the curve
     * @param <T>        Type
     * @return           Instance of the curve
     */
    public static <T extends BaseHistogram> T fromJson(String json, Class<T> curveClass) {
        try {
            return JsonMappers.getMapper().readValue(json, curveClass);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     *
     * @param yaml       YAML representation
     * @param curveClass Class for the curve
     * @param <T>        Type
     * @return           Instance of the curve
     */
    public static <T extends BaseHistogram> T fromYaml(String yaml, Class<T> curveClass) {
        try {
            return JsonMappers.getYamlMapper().readValue(yaml, curveClass);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

}
