{-# 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.Redshift.DescribeReservedNodeOfferings
-- Copyright   : (c) 2013-2016 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)
--
-- Returns a list of the available reserved node offerings by Amazon Redshift with their descriptions including the node type, the fixed and recurring costs of reserving the node and duration the node will be reserved for you. These descriptions help you determine which reserve node offering you want to purchase. You then use the unique offering ID in you call to 'PurchaseReservedNodeOffering' to reserve one or more nodes for your Amazon Redshift cluster.
--
--
-- For more information about reserved node offerings, go to <http://docs.aws.amazon.com/redshift/latest/mgmt/purchase-reserved-node-instance.html Purchasing Reserved Nodes> in the /Amazon Redshift Cluster Management Guide/ .
--
--
-- This operation returns paginated results.
module Network.AWS.Redshift.DescribeReservedNodeOfferings
    (
    -- * Creating a Request
      describeReservedNodeOfferings
    , DescribeReservedNodeOfferings
    -- * Request Lenses
    , drnoReservedNodeOfferingId
    , drnoMarker
    , drnoMaxRecords

    -- * Destructuring the Response
    , describeReservedNodeOfferingsResponse
    , DescribeReservedNodeOfferingsResponse
    -- * Response Lenses
    , drnorsReservedNodeOfferings
    , drnorsMarker
    , drnorsResponseStatus
    ) where

import           Network.AWS.Lens
import           Network.AWS.Pager
import           Network.AWS.Prelude
import           Network.AWS.Redshift.Types
import           Network.AWS.Redshift.Types.Product
import           Network.AWS.Request
import           Network.AWS.Response

-- |
--
--
--
-- /See:/ 'describeReservedNodeOfferings' smart constructor.
data DescribeReservedNodeOfferings = DescribeReservedNodeOfferings'
    { _drnoReservedNodeOfferingId :: !(Maybe Text)
    , _drnoMarker                 :: !(Maybe Text)
    , _drnoMaxRecords             :: !(Maybe Int)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeReservedNodeOfferings' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drnoReservedNodeOfferingId' - The unique identifier for the offering.
--
-- * 'drnoMarker' - An optional parameter that specifies the starting point to return a set of response records. When the results of a 'DescribeReservedNodeOfferings' request exceed the value specified in @MaxRecords@ , AWS returns a value in the @Marker@ field of the response. You can retrieve the next set of response records by providing the returned marker value in the @Marker@ parameter and retrying the request.
--
-- * 'drnoMaxRecords' - The maximum number of response records to return in each call. If the number of remaining response records exceeds the specified @MaxRecords@ value, a value is returned in a @marker@ field of the response. You can retrieve the next set of records by retrying the command with the returned marker value.  Default: @100@  Constraints: minimum 20, maximum 100.
describeReservedNodeOfferings
    :: DescribeReservedNodeOfferings
describeReservedNodeOfferings =
    DescribeReservedNodeOfferings'
    { _drnoReservedNodeOfferingId = Nothing
    , _drnoMarker = Nothing
    , _drnoMaxRecords = Nothing
    }

-- | The unique identifier for the offering.
drnoReservedNodeOfferingId :: Lens' DescribeReservedNodeOfferings (Maybe Text)
drnoReservedNodeOfferingId = lens _drnoReservedNodeOfferingId (\ s a -> s{_drnoReservedNodeOfferingId = a});

-- | An optional parameter that specifies the starting point to return a set of response records. When the results of a 'DescribeReservedNodeOfferings' request exceed the value specified in @MaxRecords@ , AWS returns a value in the @Marker@ field of the response. You can retrieve the next set of response records by providing the returned marker value in the @Marker@ parameter and retrying the request.
drnoMarker :: Lens' DescribeReservedNodeOfferings (Maybe Text)
drnoMarker = lens _drnoMarker (\ s a -> s{_drnoMarker = a});

-- | The maximum number of response records to return in each call. If the number of remaining response records exceeds the specified @MaxRecords@ value, a value is returned in a @marker@ field of the response. You can retrieve the next set of records by retrying the command with the returned marker value.  Default: @100@  Constraints: minimum 20, maximum 100.
drnoMaxRecords :: Lens' DescribeReservedNodeOfferings (Maybe Int)
drnoMaxRecords = lens _drnoMaxRecords (\ s a -> s{_drnoMaxRecords = a});

instance AWSPager DescribeReservedNodeOfferings where
        page rq rs
          | stop (rs ^. drnorsMarker) = Nothing
          | stop (rs ^. drnorsReservedNodeOfferings) = Nothing
          | otherwise =
            Just $ rq & drnoMarker .~ rs ^. drnorsMarker

instance AWSRequest DescribeReservedNodeOfferings
         where
        type Rs DescribeReservedNodeOfferings =
             DescribeReservedNodeOfferingsResponse
        request = postQuery redshift
        response
          = receiveXMLWrapper
              "DescribeReservedNodeOfferingsResult"
              (\ s h x ->
                 DescribeReservedNodeOfferingsResponse' <$>
                   (x .@? "ReservedNodeOfferings" .!@ mempty >>=
                      may (parseXMLList "ReservedNodeOffering"))
                     <*> (x .@? "Marker")
                     <*> (pure (fromEnum s)))

instance Hashable DescribeReservedNodeOfferings

instance NFData DescribeReservedNodeOfferings

instance ToHeaders DescribeReservedNodeOfferings
         where
        toHeaders = const mempty

instance ToPath DescribeReservedNodeOfferings where
        toPath = const "/"

instance ToQuery DescribeReservedNodeOfferings where
        toQuery DescribeReservedNodeOfferings'{..}
          = mconcat
              ["Action" =:
                 ("DescribeReservedNodeOfferings" :: ByteString),
               "Version" =: ("2012-12-01" :: ByteString),
               "ReservedNodeOfferingId" =:
                 _drnoReservedNodeOfferingId,
               "Marker" =: _drnoMarker,
               "MaxRecords" =: _drnoMaxRecords]

-- |
--
--
--
-- /See:/ 'describeReservedNodeOfferingsResponse' smart constructor.
data DescribeReservedNodeOfferingsResponse = DescribeReservedNodeOfferingsResponse'
    { _drnorsReservedNodeOfferings :: !(Maybe [ReservedNodeOffering])
    , _drnorsMarker                :: !(Maybe Text)
    , _drnorsResponseStatus        :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeReservedNodeOfferingsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drnorsReservedNodeOfferings' - A list of @ReservedNodeOffering@ objects.
--
-- * 'drnorsMarker' - A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @Marker@ parameter and retrying the command. If the @Marker@ field is empty, all response records have been retrieved for the request.
--
-- * 'drnorsResponseStatus' - -- | The response status code.
describeReservedNodeOfferingsResponse
    :: Int -- ^ 'drnorsResponseStatus'
    -> DescribeReservedNodeOfferingsResponse
describeReservedNodeOfferingsResponse pResponseStatus_ =
    DescribeReservedNodeOfferingsResponse'
    { _drnorsReservedNodeOfferings = Nothing
    , _drnorsMarker = Nothing
    , _drnorsResponseStatus = pResponseStatus_
    }

-- | A list of @ReservedNodeOffering@ objects.
drnorsReservedNodeOfferings :: Lens' DescribeReservedNodeOfferingsResponse [ReservedNodeOffering]
drnorsReservedNodeOfferings = lens _drnorsReservedNodeOfferings (\ s a -> s{_drnorsReservedNodeOfferings = a}) . _Default . _Coerce;

-- | A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @Marker@ parameter and retrying the command. If the @Marker@ field is empty, all response records have been retrieved for the request.
drnorsMarker :: Lens' DescribeReservedNodeOfferingsResponse (Maybe Text)
drnorsMarker = lens _drnorsMarker (\ s a -> s{_drnorsMarker = a});

-- | -- | The response status code.
drnorsResponseStatus :: Lens' DescribeReservedNodeOfferingsResponse Int
drnorsResponseStatus = lens _drnorsResponseStatus (\ s a -> s{_drnorsResponseStatus = a});

instance NFData DescribeReservedNodeOfferingsResponse