/*
 * Copyright 2017-present 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.incubator.net.virtual.impl.intent.phase;

import org.onosproject.incubator.net.virtual.NetworkId;
import org.onosproject.incubator.net.virtual.impl.intent.VirtualIntentProcessor;
import org.onosproject.net.intent.IntentData;

import java.util.Optional;

import static com.google.common.base.Preconditions.checkNotNull;
import static org.onosproject.incubator.net.virtual.impl.intent.phase.VirtualIntentProcessPhase.transferErrorCount;

/**
 * Represents a phase where intent installation has been requested
 * for a virtual network.
 */
final class VirtualIntentInstallRequest implements VirtualIntentProcessPhase {

    private final NetworkId networkId;
    private final VirtualIntentProcessor processor;
    private final IntentData data;
    private final Optional<IntentData> stored;

    /**
     * Creates an install request phase.
     *
     * @param networkId virtual network identifier
     * @param processor  intent processor to be passed to intent process phases
     *                   generated after this phase
     * @param intentData intent data to be processed
     * @param stored     intent data stored in the store
     */
    VirtualIntentInstallRequest(NetworkId networkId, VirtualIntentProcessor processor,
                                IntentData intentData, Optional<IntentData> stored) {
        this.networkId = checkNotNull(networkId);
        this.processor = checkNotNull(processor);
        this.data = checkNotNull(intentData);
        this.stored = checkNotNull(stored);
    }

    @Override
    public Optional<VirtualIntentProcessPhase> execute() {
        transferErrorCount(data, stored);

        return Optional.of(new VirtualIntentCompiling(networkId, processor, data, stored));
    }
}