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// 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
//
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package org.apache.cloudstack.api.command.user.vm;

import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.ApiErrorCode;
import org.apache.cloudstack.api.BaseAsyncCmd;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.response.TemplateResponse;
import org.apache.cloudstack.api.response.UserVmResponse;
import org.apache.log4j.Logger;

import com.cloud.event.EventTypes;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.user.Account;
import com.cloud.user.UserContext;
import com.cloud.uservm.UserVm;

@APICommand(name = "restoreVirtualMachine", description="Restore a VM to original template/ISO or new template/ISO", responseObject=UserVmResponse.class, since="3.0.0")
public class RestoreVMCmd extends BaseAsyncCmd {
    public static final Logger s_logger = Logger.getLogger(RestoreVMCmd.class);
    private static final String s_name = "restorevmresponse";

    @Parameter(name=ApiConstants.VIRTUAL_MACHINE_ID, type=CommandType.UUID, entityType=UserVmResponse.class,
            required=true, description="Virtual Machine ID")
    private Long vmId;

    @Parameter(name=ApiConstants.TEMPLATE_ID, type=CommandType.UUID, entityType = TemplateResponse.class, description="an optional template Id to restore vm from the new template. This can be an ISO id in case of restore vm deployed using ISO")
    private Long templateId;


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

    @Override
    public String getEventDescription() {
        return "Restore a VM to orignal template or specific snapshot";
    }

    @Override
    public void execute() throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException, ConcurrentOperationException,
            ResourceAllocationException {
        UserVm result;
        UserContext.current().setEventDetails("Vm Id: " + getVmId());
        result = _userVmService.restoreVM(this);
        if (result != null) {
            UserVmResponse response = _responseGenerator.createUserVmResponse("virtualmachine", result).get(0);
            response.setResponseName(getCommandName());
            this.setResponseObject(response);
        } else {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to restore vm " + getVmId());
        }
    }

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

    @Override
    public long getEntityOwnerId() {
        UserVm vm = _responseGenerator.findUserVmById(getVmId());
        if (vm == null) {
             return Account.ACCOUNT_ID_SYSTEM; // bad id given, parent this command to SYSTEM so ERROR events are tracked
        }
        return vm.getAccountId();
    }

    public long getVmId() {
        return vmId;
    }

    public Long getTemplateId() {
        return templateId;
    }
}
