{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

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

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Network.AWS.StorageGateway.DescribeWorkingStorage
-- Copyright   : (c) 2013-2015 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- This operation returns information about the working storage of a
-- gateway. This operation is supported only for the gateway-stored volume
-- architecture. This operation is deprecated in cached-volumes API version
-- (20120630). Use DescribeUploadBuffer instead.
--
-- Working storage is also referred to as upload buffer. You can also use
-- the DescribeUploadBuffer operation to add upload buffer to a
-- stored-volume gateway.
--
-- The response includes disk IDs that are configured as working storage,
-- and it includes the amount of working storage allocated and used.
--
-- /See:/ <http://docs.aws.amazon.com/storagegateway/latest/APIReference/API_DescribeWorkingStorage.html AWS API Reference> for DescribeWorkingStorage.
module Network.AWS.StorageGateway.DescribeWorkingStorage
    (
    -- * Creating a Request
      describeWorkingStorage
    , DescribeWorkingStorage
    -- * Request Lenses
    , dwsGatewayARN

    -- * Destructuring the Response
    , describeWorkingStorageResponse
    , DescribeWorkingStorageResponse
    -- * Response Lenses
    , dwsrsGatewayARN
    , dwsrsDiskIds
    , dwsrsWorkingStorageAllocatedInBytes
    , dwsrsWorkingStorageUsedInBytes
    , dwsrsStatus
    ) where

import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response
import           Network.AWS.StorageGateway.Types
import           Network.AWS.StorageGateway.Types.Product

-- | A JSON object containing the of the gateway.
--
-- /See:/ 'describeWorkingStorage' smart constructor.
newtype DescribeWorkingStorage = DescribeWorkingStorage'
    { _dwsGatewayARN :: Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeWorkingStorage' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dwsGatewayARN'
describeWorkingStorage
    :: Text -- ^ 'dwsGatewayARN'
    -> DescribeWorkingStorage
describeWorkingStorage pGatewayARN_ =
    DescribeWorkingStorage'
    { _dwsGatewayARN = pGatewayARN_
    }

-- | Undocumented member.
dwsGatewayARN :: Lens' DescribeWorkingStorage Text
dwsGatewayARN = lens _dwsGatewayARN (\ s a -> s{_dwsGatewayARN = a});

instance AWSRequest DescribeWorkingStorage where
        type Rs DescribeWorkingStorage =
             DescribeWorkingStorageResponse
        request = postJSON storageGateway
        response
          = receiveJSON
              (\ s h x ->
                 DescribeWorkingStorageResponse' <$>
                   (x .?> "GatewayARN") <*> (x .?> "DiskIds" .!@ mempty)
                     <*> (x .?> "WorkingStorageAllocatedInBytes")
                     <*> (x .?> "WorkingStorageUsedInBytes")
                     <*> (pure (fromEnum s)))

instance ToHeaders DescribeWorkingStorage where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("StorageGateway_20130630.DescribeWorkingStorage" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON DescribeWorkingStorage where
        toJSON DescribeWorkingStorage'{..}
          = object
              (catMaybes [Just ("GatewayARN" .= _dwsGatewayARN)])

instance ToPath DescribeWorkingStorage where
        toPath = const "/"

instance ToQuery DescribeWorkingStorage where
        toQuery = const mempty

-- | A JSON object containing the following fields:
--
-- /See:/ 'describeWorkingStorageResponse' smart constructor.
data DescribeWorkingStorageResponse = DescribeWorkingStorageResponse'
    { _dwsrsGatewayARN                     :: !(Maybe Text)
    , _dwsrsDiskIds                        :: !(Maybe [Text])
    , _dwsrsWorkingStorageAllocatedInBytes :: !(Maybe Integer)
    , _dwsrsWorkingStorageUsedInBytes      :: !(Maybe Integer)
    , _dwsrsStatus                         :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeWorkingStorageResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dwsrsGatewayARN'
--
-- * 'dwsrsDiskIds'
--
-- * 'dwsrsWorkingStorageAllocatedInBytes'
--
-- * 'dwsrsWorkingStorageUsedInBytes'
--
-- * 'dwsrsStatus'
describeWorkingStorageResponse
    :: Int -- ^ 'dwsrsStatus'
    -> DescribeWorkingStorageResponse
describeWorkingStorageResponse pStatus_ =
    DescribeWorkingStorageResponse'
    { _dwsrsGatewayARN = Nothing
    , _dwsrsDiskIds = Nothing
    , _dwsrsWorkingStorageAllocatedInBytes = Nothing
    , _dwsrsWorkingStorageUsedInBytes = Nothing
    , _dwsrsStatus = pStatus_
    }

-- | Undocumented member.
dwsrsGatewayARN :: Lens' DescribeWorkingStorageResponse (Maybe Text)
dwsrsGatewayARN = lens _dwsrsGatewayARN (\ s a -> s{_dwsrsGatewayARN = a});

-- | An array of the gateway\'s local disk IDs that are configured as working
-- storage. Each local disk ID is specified as a string (minimum length of
-- 1 and maximum length of 300). If no local disks are configured as
-- working storage, then the DiskIds array is empty.
dwsrsDiskIds :: Lens' DescribeWorkingStorageResponse [Text]
dwsrsDiskIds = lens _dwsrsDiskIds (\ s a -> s{_dwsrsDiskIds = a}) . _Default . _Coerce;

-- | The total working storage in bytes allocated for the gateway. If no
-- working storage is configured for the gateway, this field returns 0.
dwsrsWorkingStorageAllocatedInBytes :: Lens' DescribeWorkingStorageResponse (Maybe Integer)
dwsrsWorkingStorageAllocatedInBytes = lens _dwsrsWorkingStorageAllocatedInBytes (\ s a -> s{_dwsrsWorkingStorageAllocatedInBytes = a});

-- | The total working storage in bytes in use by the gateway. If no working
-- storage is configured for the gateway, this field returns 0.
dwsrsWorkingStorageUsedInBytes :: Lens' DescribeWorkingStorageResponse (Maybe Integer)
dwsrsWorkingStorageUsedInBytes = lens _dwsrsWorkingStorageUsedInBytes (\ s a -> s{_dwsrsWorkingStorageUsedInBytes = a});

-- | The response status code.
dwsrsStatus :: Lens' DescribeWorkingStorageResponse Int
dwsrsStatus = lens _dwsrsStatus (\ s a -> s{_dwsrsStatus = a});