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package com.cloud.hypervisor;

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

import org.apache.cloudstack.backup.Backup;
import org.apache.cloudstack.framework.config.ConfigKey;

import com.cloud.agent.api.Command;
import com.cloud.agent.api.to.NicTO;
import com.cloud.agent.api.to.VirtualMachineTO;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.storage.StoragePool;
import com.cloud.storage.Volume;
import com.cloud.utils.Pair;
import com.cloud.utils.component.Adapter;
import com.cloud.vm.NicProfile;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;
import org.apache.cloudstack.vm.UnmanagedInstanceTO;

public interface HypervisorGuru extends Adapter {

    ConfigKey<String> HypervisorCustomDisplayName = new ConfigKey<>(String.class,
            "hypervisor.custom.display.name", ConfigKey.CATEGORY_ADVANCED, "Custom",
            "Display name for custom hypervisor", true, ConfigKey.Scope.Global, null);

    HypervisorType getHypervisorType();

    /**
     * Convert from a virtual machine to the
     * virtual machine that the hypervisor expects.
     * @param vm
     * @return
     */
    VirtualMachineTO implement(VirtualMachineProfile vm);

    /**
     * Gives hypervisor guru opportunity to decide if certain commands need to be delegated to another host, for instance, we may have the opportunity to change from a system VM (is considered a host) to a real host to execute commands.
     *
     * @param hostId original hypervisor host
     * @param cmd command that is going to be sent, hypervisor guru usually needs to register various context objects into the command object
     *
     * @return delegated host id if the command will be delegated
     */
    Pair<Boolean, Long> getCommandHostDelegation(long hostId, Command cmd);

    /**
     *  @return true if VM can be migrated independently with CloudStack, and therefore CloudStack needs to track and reflect host change
     *  into CloudStack database, false if CloudStack enforces VM sync logic
     *
     */
    boolean trackVmHostChange();

    /**
     * @param profile
     * @return
     */
    NicTO toNicTO(NicProfile profile);

    /**
     * Give hypervisor guru opportunity to decide if certain command needs to be done after expunge VM from DB
     * @param vm
     * @return a list of Commands
     */
    List<Command> finalizeExpunge(VirtualMachine vm);

    /**
     * Give the hypervisor guru the opportinity to decide if additional clean is
     * required for nics before expunging the VM
     *
     */
    List<Command> finalizeExpungeNics(VirtualMachine vm, List<NicProfile> nics);

    List<Command> finalizeExpungeVolumes(VirtualMachine vm);

    Map<String, String> getClusterSettings(long vmId);

    VirtualMachine importVirtualMachineFromBackup(long zoneId, long domainId, long accountId, long userId,
                                                  String vmInternalName, Backup backup) throws Exception;

    boolean attachRestoredVolumeToVirtualMachine(long zoneId, String location, Backup.VolumeInfo volumeInfo,
                                                 VirtualMachine vm, long poolId, Backup backup) throws Exception;
    /**
     * Will generate commands to migrate a vm to a pool. For now this will only work for stopped VMs on Vmware.
     *
     * @param vm the stopped vm to migrate
     * @param destination the primary storage pool to migrate to
     * @return a list of commands to perform for a successful migration
     */
    List<Command> finalizeMigrate(VirtualMachine vm, Map<Volume, StoragePool> volumeToPool);


    /**
     * Will perform a clone of a VM on an external host (if the guru can handle)
     * @param hostIp VM's source host IP
     * @param vmName name of the source VM to clone from
     * @param params hypervisor specific additional parameters
     * @return a reference to the cloned VM
     */
    UnmanagedInstanceTO cloneHypervisorVMOutOfBand(String hostIp, String vmName,
                                                   Map<String, String> params);

    /**
     * Removes a VM created as a clone of a VM on an external host
     * @param hostIp VM's source host IP
     * @param vmName name of the VM to remove
     * @param params hypervisor specific additional parameters
     * @return true if the operation succeeds, false if not
     */
    boolean removeClonedHypervisorVMOutOfBand(String hostIp, String vmName,
                                              Map<String, String> params);
}