// 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 com.cloud.api.commands;

import java.util.ArrayList;
import java.util.List;

import javax.inject.Inject;

import org.apache.log4j.Logger;

import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.ApiErrorCode;
import org.apache.cloudstack.api.BaseListCmd;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.response.ListResponse;
import org.apache.cloudstack.api.response.PhysicalNetworkResponse;

import com.cloud.api.response.NetscalerLoadBalancerResponse;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.network.dao.ExternalLoadBalancerDeviceVO;
import com.cloud.network.element.NetscalerLoadBalancerElementService;
import com.cloud.utils.exception.CloudRuntimeException;

@APICommand(name = "listNetscalerLoadBalancers", responseObject = NetscalerLoadBalancerResponse.class, description = "lists netscaler load balancer devices")
public class ListNetscalerLoadBalancersCmd extends BaseListCmd {

    public static final Logger s_logger = Logger.getLogger(ListNetscalerLoadBalancersCmd.class.getName());
    private static final String s_name = "listnetscalerloadbalancerresponse";
    @Inject
    NetscalerLoadBalancerElementService _netsclarLbService;

    /////////////////////////////////////////////////////
    //////////////// API parameters /////////////////////
    /////////////////////////////////////////////////////

    @Parameter(name = ApiConstants.PHYSICAL_NETWORK_ID, type = CommandType.UUID, entityType = PhysicalNetworkResponse.class, description = "the Physical Network ID")
    private Long physicalNetworkId;

    @Parameter(name = ApiConstants.LOAD_BALANCER_DEVICE_ID,
               type = CommandType.UUID,
               entityType = NetscalerLoadBalancerResponse.class,
               description = "netscaler load balancer device ID")
    private Long lbDeviceId;

    /////////////////////////////////////////////////////
    /////////////////// Accessors ///////////////////////
    /////////////////////////////////////////////////////

    public Long getLoadBalancerDeviceId() {
        return lbDeviceId;
    }

    public Long getPhysicalNetworkId() {
        return physicalNetworkId;
    }

    /////////////////////////////////////////////////////
    /////////////// API Implementation///////////////////
    /////////////////////////////////////////////////////

    @Override
    public void execute() throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException, ConcurrentOperationException,
        ResourceAllocationException {
        try {
            List<ExternalLoadBalancerDeviceVO> lbDevices = _netsclarLbService.listNetscalerLoadBalancers(this);
            ListResponse<NetscalerLoadBalancerResponse> response = new ListResponse<NetscalerLoadBalancerResponse>();
            List<NetscalerLoadBalancerResponse> lbDevicesResponse = new ArrayList<NetscalerLoadBalancerResponse>();

            if (lbDevices != null && !lbDevices.isEmpty()) {
                for (ExternalLoadBalancerDeviceVO lbDeviceVO : lbDevices) {
                    NetscalerLoadBalancerResponse lbdeviceResponse = _netsclarLbService.createNetscalerLoadBalancerResponse(lbDeviceVO);
                    lbDevicesResponse.add(lbdeviceResponse);
                }
            }

            response.setResponses(lbDevicesResponse);
            response.setResponseName(getCommandName());
            this.setResponseObject(response);
        } catch (InvalidParameterValueException invalidParamExcp) {
            throw new ServerApiException(ApiErrorCode.PARAM_ERROR, invalidParamExcp.getMessage());
        } catch (CloudRuntimeException runtimeExcp) {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, runtimeExcp.getMessage());
        }
    }

    @Override
    public String getCommandName() {
        return s_name;
    }
}
