function Get-GpfsSnapshot {
    [CmdletBinding(DefaultParameterSetName = 'All')]
    param(
        [Parameter(Mandatory, Position = 0)]
        [string]$FilesystemName,

        [Parameter(Mandatory, ParameterSetName = 'ByName', Position = 1)]
        [string]$SnapshotName,

        [Parameter(ParameterSetName = 'All')]
        [string]$FilesetName
    )

    if ($PSCmdlet.ParameterSetName -eq 'ByName') {
        Invoke-GpfsApiRequest -Method GET -Endpoint "filesystems/$FilesystemName/snapshots/$SnapshotName"
    }
    else {
        $params = @{ Method = 'GET'; Endpoint = "filesystems/$FilesystemName/snapshots" }
        if ($FilesetName) {
            $params['QueryParameters'] = @{ filesetName = $FilesetName }
        }
        Invoke-GpfsApiRequest @params
    }
}

function New-GpfsSnapshot {
    [CmdletBinding(SupportsShouldProcess)]
    param(
        [Parameter(Mandatory, Position = 0)]
        [string]$FilesystemName,

        [Parameter(Mandatory)]
        [hashtable]$Settings
    )

    if ($PSCmdlet.ShouldProcess($FilesystemName, 'Create snapshot')) {
        Invoke-GpfsApiRequest -Method POST -Endpoint "filesystems/$FilesystemName/snapshots" -Body $Settings
    }
}

function Remove-GpfsSnapshot {
    [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'High')]
    param(
        [Parameter(Mandatory, Position = 0)]
        [string]$FilesystemName,

        [Parameter(Mandatory, Position = 1)]
        [string]$SnapshotName
    )

    if ($PSCmdlet.ShouldProcess($SnapshotName, 'Remove snapshot')) {
        Invoke-GpfsApiRequest -Method DELETE -Endpoint "filesystems/$FilesystemName/snapshots/$SnapshotName"
    }
}