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// 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
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// specific language governing permissions and limitations
// under the License.
package com.cloud.vm;

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

import com.cloud.agent.api.VmStatsEntry;
import com.cloud.api.query.vo.UserVmJoinVO;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.projects.Project.ListProjectResourcesCriteria;
import com.cloud.server.Criteria;
import com.cloud.user.Account;
import com.cloud.uservm.UserVm;
import com.cloud.utils.Pair;

/**
 *
 * 
 */
public interface UserVmManager extends VirtualMachineGuru<UserVmVO>, UserVmService{

	static final int MAX_USER_DATA_LENGTH_BYTES = 2048;
    /**
     * @param hostId get all of the virtual machines that belong to one host.
     * @return collection of VirtualMachine.
     */
    List<? extends UserVm> getVirtualMachines(long hostId);
    
    /**
     * @param vmId id of the virtual machine.
     * @return VirtualMachine
     */
    UserVmVO getVirtualMachine(long vmId);
    
    /**
     * Attaches an ISO to the virtual CDROM device of the specified VM. Will eject any existing virtual CDROM if isoPath is null.
     * @param vmId
     * @param isoId
     * @param attach whether to attach or detach the given iso
     * @return
     */
    boolean attachISOToVM(long vmId, long isoId, boolean attach);
    
    /**
     * Stops the virtual machine
     * @param userId the id of the user performing the action
     * @param vmId
     * @return true if stopped; false if problems.
     */
    boolean stopVirtualMachine(long userId, long vmId);

    /**
     * Obtains statistics for a list of host or VMs; CPU and network utilization
     * @param host ID
     * @param host name
     * @param list of VM IDs or host id
     * @return GetVmStatsAnswer
     */
    HashMap<Long, VmStatsEntry> getVirtualMachineStatistics(long hostId, String hostName, List<Long> vmIds);
    
    boolean deleteVmGroup(long groupId);

    boolean addInstanceToGroup(long userVmId, String group);

    InstanceGroupVO getGroupForVm(long vmId);
    
    void removeInstanceFromInstanceGroup(long vmId);

	boolean expunge(UserVmVO vm, long callerUserId, Account caller);
	
    /**
     * Obtains a list of virtual machines by the specified search criteria.
     * Can search by: "userId", "name", "state", "dataCenterId", "podId", "hostId"
     * @param c
     * @param caller TODO
     * @param domainId TODO
     * @param isRecursive TODO
     * @param permittedAccounts TODO
     * @param listAll TODO
     * @param listProjectResourcesCriteria TODO
     * @param tags TODO
     * @return List of UserVMs + count
     */
    Pair<List<UserVmJoinVO>, Integer> searchForUserVMs(Criteria c, Account caller, Long domainId, boolean isRecursive, List<Long> permittedAccounts, boolean listAll, ListProjectResourcesCriteria listProjectResourcesCriteria, Map<String, String> tags);

    String getChecksum(Long hostId, String templatePath);
    
    Pair<UserVmVO, Map<VirtualMachineProfile.Param, Object>> startVirtualMachine(long vmId, Long hostId, Map<VirtualMachineProfile.Param, Object> additionalParams) throws ConcurrentOperationException, ResourceUnavailableException, InsufficientCapacityException;

}