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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
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
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package com.cloud.storage.snapshot;

import java.util.List;

import org.apache.cloudstack.engine.subsystem.api.storage.VolumeInfo;

import com.cloud.agent.api.Answer;
import com.cloud.agent.api.Command;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.host.HostVO;
import com.cloud.storage.Snapshot;
import com.cloud.storage.SnapshotPolicyVO;
import com.cloud.storage.SnapshotVO;
import com.cloud.storage.Volume;
import com.cloud.storage.VolumeVO;
import com.cloud.utils.db.Filter;
import com.cloud.utils.fsm.NoTransitionException;

/**
 * 
 * 
 */
public interface SnapshotManager {

    public static final int HOURLYMAX = 8;
    public static final int DAILYMAX = 8;
    public static final int WEEKLYMAX = 8;
    public static final int MONTHLYMAX = 12;
    public static final int DELTAMAX = 16;

    void deletePoliciesForVolume(Long volumeId);

    /**
     * For each of the volumes in the account, (which can span across multiple zones and multiple secondary storages), delete
     * the dir on the secondary storage which contains the backed up snapshots for that volume. This is called during
     * deleteAccount.
     * 
     * @param accountId
     *            The account which is to be deleted.
     */
    boolean deleteSnapshotDirsForAccount(long accountId);
  
    void downloadSnapshotsFromSwift(SnapshotVO ss);

    void downloadSnapshotsFromS3(SnapshotVO snapshot);

    String getSecondaryStorageURL(SnapshotVO snapshot);

    void deleteSnapshotsDirForVolume(String secondaryStoragePoolUrl, Long dcId, Long accountId, Long volumeId);

	boolean canOperateOnVolume(Volume volume);

	Answer sendToPool(Volume vol, Command cmd);

	SnapshotVO getParentSnapshot(VolumeInfo volume, Snapshot snapshot);

	Snapshot backupSnapshot(Long snapshotId);
}