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/*
 * Copyright 2014-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.net.device;

import org.onosproject.net.DeviceId;
import org.onosproject.net.MastershipRole;
import org.onosproject.net.provider.ProviderService;

import java.util.Collection;
import java.util.List;

/**
 * Service through which device providers can inject device information into
 * the core.
 */
public interface DeviceProviderService extends ProviderService {

    // TODO: define suspend and remove actions on the mezzanine administrative API

    /**
     * Signals the core that a device has connected or has been detected somehow.
     *
     * @param deviceId device identifier
     * @param deviceDescription information about network device
     */
    void deviceConnected(DeviceId deviceId, DeviceDescription deviceDescription);

    /**
     * Signals the core that a device has disconnected or is no longer reachable.
     *
     * @param deviceId identity of the device to be removed
     */
    void deviceDisconnected(DeviceId deviceId);

    /**
     * Updates information about all ports of a device. It is up to the core to
     * determine what has changed.
     *
     * @param deviceId         identity of the device
     * @param portDescriptions list of device ports
     */
    void updatePorts(DeviceId deviceId, List portDescriptions);

    /**
     * Delete information about a single port of a device.
     * It is up to the core to determine what has changed.
     *
     * @param deviceId         identity of the device
     * @param portDescription       device port description
     */
    default void deletePort(DeviceId deviceId, PortDescription portDescription) {

    }

    /**
     * Notifies the core about port status change of a single port.
     *
     * @param deviceId        identity of the device
     * @param portDescription description of the port that changed
     */
    void portStatusChanged(DeviceId deviceId, PortDescription portDescription);

    /**
     * Notifies the core about the result of a role request sent to a device.
     * This method assumes that the provider knows the original role that was
     * requested for a given response, if that is not the case, and only the
     * response is known to the provider, then {@link #receivedRoleReply(DeviceId,
     * MastershipRole)} should be used instead.
     *
     * @param deviceId  identity of the device
     * @param requested mastership role that was requested by the node
     * @param response  mastership role the switch accepted
     */
    void receivedRoleReply(DeviceId deviceId, MastershipRole requested, MastershipRole response);

    /**
     * Notifies the core about a mastership role reported by the given device
     * for this node.
     *
     * @param deviceId  identity of the device
     * @param response  mastership role the switch accepted
     */
    default void receivedRoleReply(DeviceId deviceId, MastershipRole response) {
        receivedRoleReply(deviceId, null, response);
    }

    /**
     * Updates statistics about all ports of a device.
     *
     * @param deviceId          identity of the device
     * @param portStatistics  list of device port statistics
     */
    void updatePortStatistics(DeviceId deviceId, Collection portStatistics);

}