//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.apache.cloudstack.network.opendaylight;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.ejb.Local;
import javax.inject.Inject;
import javax.naming.ConfigurationException;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import org.apache.cloudstack.network.opendaylight.agent.commands.StartupOpenDaylightControllerCommand;

import com.cloud.agent.api.StartupCommand;
import com.cloud.deploy.DeployDestination;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.host.Host;
import com.cloud.host.HostVO;
import com.cloud.network.Network;
import com.cloud.network.Network.Capability;
import com.cloud.network.Network.Provider;
import com.cloud.network.Network.Service;
import com.cloud.network.PhysicalNetworkServiceProvider;
import com.cloud.network.element.ConnectivityProvider;
import com.cloud.network.element.NetworkElement;
import com.cloud.offering.NetworkOffering;
import com.cloud.resource.ResourceManager;
import com.cloud.resource.ResourceStateAdapter;
import com.cloud.resource.ServerResource;
import com.cloud.resource.UnableDeleteHostException;
import com.cloud.utils.component.AdapterBase;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.NicProfile;
import com.cloud.vm.ReservationContext;
import com.cloud.vm.VirtualMachineProfile;

@Component
@Local(value = {NetworkElement.class, ConnectivityProvider.class})
public class OpendaylightElement extends AdapterBase implements ConnectivityProvider, ResourceStateAdapter {

    private static final Logger s_logger = Logger.getLogger(OpendaylightElement.class);
    private static final Map<Service, Map<Capability, String>> s_capabilities = setCapabilities();

    @Inject
    ResourceManager resourceManager;

    @Override
    public Map<Service, Map<Capability, String>> getCapabilities() {
        return s_capabilities;
    }

    @Override
    public Provider getProvider() {
        return Provider.Opendaylight;
    }

    @Override
    public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
        boolean configured = super.configure(name, params);
        if (configured)
            resourceManager.registerResourceStateAdapter(name, this);
        return configured;
    }

    @Override
    public boolean implement(Network network, NetworkOffering offering, DeployDestination dest, ReservationContext context) throws ConcurrentOperationException,
    ResourceUnavailableException, InsufficientCapacityException {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean prepare(Network network, NicProfile nic, VirtualMachineProfile vm, DeployDestination dest, ReservationContext context) throws ConcurrentOperationException,
    ResourceUnavailableException, InsufficientCapacityException {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean release(Network network, NicProfile nic, VirtualMachineProfile vm, ReservationContext context) throws ConcurrentOperationException,
    ResourceUnavailableException {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean shutdown(Network network, ReservationContext context, boolean cleanup) throws ConcurrentOperationException, ResourceUnavailableException {
        return true;
    }

    @Override
    public boolean destroy(Network network, ReservationContext context) throws ConcurrentOperationException, ResourceUnavailableException {
        return true;
    }

    @Override
    public boolean isReady(PhysicalNetworkServiceProvider provider) {
        return true;
    }

    @Override
    public boolean shutdownProviderInstances(PhysicalNetworkServiceProvider provider, ReservationContext context) throws ConcurrentOperationException,
    ResourceUnavailableException {
        return true;
    }

    @Override
    public boolean canEnableIndividualServices() {
        return false;
    }

    @Override
    public boolean verifyServicesCombination(Set<Service> services) {
        if (services.contains(Service.Connectivity) && services.size() == 1)
            return true;
        return false;
    }

    @Override
    public HostVO createHostVOForConnectedAgent(HostVO host, StartupCommand[] startup) {
        if (!(startup[0] instanceof StartupOpenDaylightControllerCommand)) {
            return null;
        }
        throw new CloudRuntimeException("createHostVOForConnectedAgent is not implemented for OpendaylightElement");
    }

    @Override
    public HostVO createHostVOForDirectConnectAgent(HostVO host, StartupCommand[] startup, ServerResource resource, Map<String, String> details, List<String> hostTags) {
        if (!(startup[0] instanceof StartupOpenDaylightControllerCommand)) {
            return null;
        }
        host.setType(Host.Type.L2Networking);
        return host;
    }

    @Override
    public DeleteHostAnswer deleteHost(HostVO host, boolean isForced, boolean isForceDeleteStorage) throws UnableDeleteHostException {
        return new DeleteHostAnswer(true);
    }

    private static Map<Service, Map<Capability, String>> setCapabilities() {
        Map<Service, Map<Capability, String>> capabilities = new HashMap<Service, Map<Capability, String>>();

        // L2 Support : SDN provisioning
        capabilities.put(Service.Connectivity, null);

        return capabilities;
    }

}
