// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.api.commands;

import java.util.List;

import org.apache.log4j.Logger;

import com.cloud.api.ApiConstants;
import com.cloud.api.BaseAsyncCmd;
import com.cloud.api.BaseCmd;
import com.cloud.api.IdentityMapper;
import com.cloud.api.Implementation;
import com.cloud.api.Parameter;
import com.cloud.api.ServerApiException;
import com.cloud.api.response.TemplateResponse;
import com.cloud.async.AsyncJob;
import com.cloud.event.EventTypes;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.StorageUnavailableException;
import com.cloud.template.VirtualMachineTemplate;
import com.cloud.user.Account;
import com.cloud.user.UserContext;

@Implementation(description="Copies a template from one zone to another.", responseObject=TemplateResponse.class)
public class CopyTemplateCmd extends BaseAsyncCmd {
	public static final Logger s_logger = Logger.getLogger(CopyTemplateCmd.class.getName());
    private static final String s_name = "copytemplateresponse";

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

    @IdentityMapper(entityTableName="data_center")
    @Parameter(name=ApiConstants.DESTINATION_ZONE_ID, type=CommandType.LONG, required=true, description="ID of the zone the template is being copied to.")
    private Long destZoneId;

    @IdentityMapper(entityTableName="vm_template")
    @Parameter(name=ApiConstants.ID, type=CommandType.LONG, required=true, description="Template ID.")
    private Long id;

    @IdentityMapper(entityTableName="data_center")
    @Parameter(name=ApiConstants.SOURCE_ZONE_ID, type=CommandType.LONG, required=true, description="ID of the zone the template is currently hosted on.")
    private Long sourceZoneId;


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

    public Long getDestinationZoneId() {
        return destZoneId;
    }

    public Long getId() {
        return id;
    }

    public Long getSourceZoneId() {
        return sourceZoneId;
    }

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

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

    public static String getStaticName() {
        return s_name;
    }

    @Override
    public long getEntityOwnerId() {
        VirtualMachineTemplate template = _entityMgr.findById(VirtualMachineTemplate.class, getId());
        if (template != null) {
            return template.getAccountId();
        }

        // bad id given, parent this command to SYSTEM so ERROR events are tracked
        return Account.ACCOUNT_ID_SYSTEM;
    }

    @Override
    public String getEventType() {
        return EventTypes.EVENT_TEMPLATE_COPY;
    }

    @Override
    public String getEventDescription() {
        return  "copying template: " + getId() + " from zone: " + getSourceZoneId() + " to zone: " + getDestinationZoneId();
    }
    
    public AsyncJob.Type getInstanceType() {
    	return AsyncJob.Type.Template;
    }
    
    public Long getInstanceId() {
    	return getId();
    }

    @Override
    public void execute() throws ResourceAllocationException{
        try {
        	UserContext.current().setEventDetails(getEventDescription());
            VirtualMachineTemplate template = _templateService.copyTemplate(this);
            
            if (template != null){
                List<TemplateResponse> listResponse = _responseGenerator.createTemplateResponses(template.getId(), getDestinationZoneId(), false);
                TemplateResponse response = new TemplateResponse();
                if (listResponse != null && !listResponse.isEmpty()) {
                    response = listResponse.get(0);
                }
                    
                response.setResponseName(getCommandName());              
                this.setResponseObject(response);
            } else {
                throw new ServerApiException(BaseCmd.INTERNAL_ERROR, "Failed to copy template");
            }
        } catch (StorageUnavailableException ex) {
            s_logger.warn("Exception: ", ex);
            throw new ServerApiException(BaseCmd.RESOURCE_UNAVAILABLE_ERROR, ex.getMessage());
        } 
    }
}