/*
 * Copyright 2016 Open Networking Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://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.
 */
package org.onosproject.tetopology.management.api.link;

import java.util.List;
import java.util.Objects;

import com.google.common.base.MoreObjects;

/**
 * Represents a list of backup service paths on the underlay topology that
 * protect the underlay primary path.
 */
public class UnderlayBackupPath extends UnderlayAbstractPath {
    private final long index;

    /**
     * Creates a underlay backup path.
     *
     * @param index        the path index
     * @param pathElements list of backup service paths
     * @param loose        loose if true; restrict otherwise
     */
    public UnderlayBackupPath(long index, List<PathElement> pathElements,
                              Boolean loose) {
        super(pathElements, loose);
        this.index = index;
    }

    /**
     * Returns the path index.
     *
     * @return path index
     */
    public long index() {
        return index;
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), index);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof UnderlayBackupPath) {
            if (!super.equals(obj)) {
                return false;
            }
            UnderlayBackupPath that = (UnderlayBackupPath) obj;
            return this.index == that.index;
        }
        return false;
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(getClass())
                .add("index", index)
                .add("pathElements", pathElements())
                .add("loose", loose())
                .toString();
    }
}