/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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.linalg.indexing.conditions;

import org.nd4j.common.util.ArrayUtil;

public class ConditionBuilder {

    private Condition soFar;


    public ConditionBuilder or(Condition... conditions) {
        if (soFar == null)
            soFar = new Or(conditions);
        else {
            soFar = new Or(ArrayUtil.combine(conditions, new Condition[] {soFar}));
        }
        return this;
    }

    public ConditionBuilder and(Condition... conditions) {
        if (soFar == null)
            soFar = new And(conditions);
        else {
            soFar = new And(ArrayUtil.combine(conditions, new Condition[] {soFar}));
        }
        return this;
    }

    public ConditionBuilder eq(Condition... conditions) {
        if (soFar == null)
            soFar = new ConditionEquals(conditions);
        else {
            soFar = new ConditionEquals(ArrayUtil.combine(conditions, new Condition[] {soFar}));
        }
        return this;
    }

    public ConditionBuilder not() {
        if (soFar == null)
            throw new IllegalStateException("No condition to take the opposite of");
        soFar = new Not(soFar);
        return this;
    }

    public Condition build() {
        return soFar;
    }


}
