{-# LANGUAGE DataKinds                   #-}
{-# LANGUAGE DeriveGeneric               #-}
{-# LANGUAGE FlexibleInstances           #-}
{-# LANGUAGE GeneralizedNewtypeDeriving  #-}
{-# LANGUAGE LambdaCase                  #-}
{-# LANGUAGE NoImplicitPrelude           #-}
{-# LANGUAGE OverloadedStrings           #-}
{-# LANGUAGE RecordWildCards             #-}
{-# LANGUAGE TypeFamilies                #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}

-- Module      : Network.AWS.StorageGateway.CreateSnapshot
-- Copyright   : (c) 2013-2014 Brendan Hay <brendan.g.hay@gmail.com>
-- License     : This Source Code Form is subject to the terms of
--               the Mozilla Public License, v. 2.0.
--               A copy of the MPL can be found in the LICENSE file or
--               you can obtain it at http://mozilla.org/MPL/2.0/.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : experimental
-- Portability : non-portable (GHC extensions)
--
-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- | This operation initiates a snapshot of a volume.
--
-- AWS Storage Gateway provides the ability to back up point-in-time snapshots
-- of your data to Amazon Simple Storage (S3) for durable off-site recovery, as
-- well as import the data to an Amazon Elastic Block Store (EBS) volume in
-- Amazon Elastic Compute Cloud (EC2). You can take snapshots of your gateway
-- volume on a scheduled or ad-hoc basis. This API enables you to take ad-hoc
-- snapshot. For more information, see <http://docs.aws.amazon.com/storagegateway/latest/userguide/WorkingWithSnapshots.html Working With Snapshots in the AWS StorageGateway Console>.
--
-- In the CreateSnapshot request you identify the volume by providing its
-- Amazon Resource Name (ARN). You must also provide description for the
-- snapshot. When AWS Storage Gateway takes the snapshot of specified volume,
-- the snapshot and description appears in the AWS Storage Gateway Console. In
-- response, AWS Storage Gateway returns you a snapshot ID. You can use this
-- snapshot ID to check the snapshot progress or later use it when you want to
-- create a volume from a snapshot.
--
-- To list or delete a snapshot, you must use the Amazon EC2 API. For more
-- information, .
--
-- <http://docs.aws.amazon.com/storagegateway/latest/APIReference/API_CreateSnapshot.html>
module Network.AWS.StorageGateway.CreateSnapshot
    (
    -- * Request
      CreateSnapshot
    -- ** Request constructor
    , createSnapshot
    -- ** Request lenses
    , csSnapshotDescription
    , csVolumeARN

    -- * Response
    , CreateSnapshotResponse
    -- ** Response constructor
    , createSnapshotResponse
    -- ** Response lenses
    , csrSnapshotId
    , csrVolumeARN
    ) where

import Network.AWS.Data (Object)
import Network.AWS.Prelude
import Network.AWS.Request.JSON
import Network.AWS.StorageGateway.Types
import qualified GHC.Exts

data CreateSnapshot = CreateSnapshot
    { _csSnapshotDescription :: Text
    , _csVolumeARN           :: Text
    } deriving (Eq, Ord, Read, Show)

-- | 'CreateSnapshot' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'csSnapshotDescription' @::@ 'Text'
--
-- * 'csVolumeARN' @::@ 'Text'
--
createSnapshot :: Text -- ^ 'csVolumeARN'
               -> Text -- ^ 'csSnapshotDescription'
               -> CreateSnapshot
createSnapshot p1 p2 = CreateSnapshot
    { _csVolumeARN           = p1
    , _csSnapshotDescription = p2
    }

-- | Textual description of the snapshot that appears in the Amazon EC2 console,
-- Elastic Block Store snapshots panel in the Description field, and in the AWS
-- Storage Gateway snapshot Details pane, Description field
csSnapshotDescription :: Lens' CreateSnapshot Text
csSnapshotDescription =
    lens _csSnapshotDescription (\s a -> s { _csSnapshotDescription = a })

-- | The Amazon Resource Name (ARN) of the volume. Use the 'ListVolumes' operation
-- to return a list of gateway volumes.
csVolumeARN :: Lens' CreateSnapshot Text
csVolumeARN = lens _csVolumeARN (\s a -> s { _csVolumeARN = a })

data CreateSnapshotResponse = CreateSnapshotResponse
    { _csrSnapshotId :: Maybe Text
    , _csrVolumeARN  :: Maybe Text
    } deriving (Eq, Ord, Read, Show)

-- | 'CreateSnapshotResponse' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'csrSnapshotId' @::@ 'Maybe' 'Text'
--
-- * 'csrVolumeARN' @::@ 'Maybe' 'Text'
--
createSnapshotResponse :: CreateSnapshotResponse
createSnapshotResponse = CreateSnapshotResponse
    { _csrVolumeARN  = Nothing
    , _csrSnapshotId = Nothing
    }

-- | The snapshot ID that is used to refer to the snapshot in future operations
-- such as describing snapshots (Amazon Elastic Compute Cloud API 'DescribeSnapshots') or creating a volume from a snapshot ('CreateStorediSCSIVolume').
csrSnapshotId :: Lens' CreateSnapshotResponse (Maybe Text)
csrSnapshotId = lens _csrSnapshotId (\s a -> s { _csrSnapshotId = a })

-- | The Amazon Resource Name (ARN) of the volume of which the snapshot was taken.
csrVolumeARN :: Lens' CreateSnapshotResponse (Maybe Text)
csrVolumeARN = lens _csrVolumeARN (\s a -> s { _csrVolumeARN = a })

instance ToPath CreateSnapshot where
    toPath = const "/"

instance ToQuery CreateSnapshot where
    toQuery = const mempty

instance ToHeaders CreateSnapshot

instance ToJSON CreateSnapshot where
    toJSON CreateSnapshot{..} = object
        [ "VolumeARN"           .= _csVolumeARN
        , "SnapshotDescription" .= _csSnapshotDescription
        ]

instance AWSRequest CreateSnapshot where
    type Sv CreateSnapshot = StorageGateway
    type Rs CreateSnapshot = CreateSnapshotResponse

    request  = post "CreateSnapshot"
    response = jsonResponse

instance FromJSON CreateSnapshotResponse where
    parseJSON = withObject "CreateSnapshotResponse" $ \o -> CreateSnapshotResponse
        <$> o .:? "SnapshotId"
        <*> o .:? "VolumeARN"
