{-# 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.EC2.DescribeVPCClassicLinkDNSSupport
-- 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)
--
-- Describes the ClassicLink DNS support status of one or more VPCs. If
-- enabled, the DNS hostname of a linked EC2-Classic instance resolves to
-- its private IP address when addressed from an instance in the VPC to
-- which it\'s linked. Similarly, the DNS hostname of an instance in a VPC
-- resolves to its private IP address when addressed from a linked
-- EC2-Classic instance. For more information about ClassicLink, see
-- <http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-classiclink.html ClassicLink>
-- in the Amazon Elastic Compute Cloud User Guide.
module Network.AWS.EC2.DescribeVPCClassicLinkDNSSupport
    (
    -- * Creating a Request
      describeVPCClassicLinkDNSSupport
    , DescribeVPCClassicLinkDNSSupport
    -- * Request Lenses
    , dvcldsNextToken
    , dvcldsVPCIds
    , dvcldsMaxResults

    -- * Destructuring the Response
    , describeVPCClassicLinkDNSSupportResponse
    , DescribeVPCClassicLinkDNSSupportResponse
    -- * Response Lenses
    , dvpccldnssrsVPCs
    , dvpccldnssrsNextToken
    , dvpccldnssrsResponseStatus
    ) where

import           Network.AWS.EC2.Types
import           Network.AWS.EC2.Types.Product
import           Network.AWS.Lens
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | /See:/ 'describeVPCClassicLinkDNSSupport' smart constructor.
data DescribeVPCClassicLinkDNSSupport = DescribeVPCClassicLinkDNSSupport'
    { _dvcldsNextToken  :: !(Maybe Text)
    , _dvcldsVPCIds     :: !(Maybe [Text])
    , _dvcldsMaxResults :: !(Maybe Nat)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeVPCClassicLinkDNSSupport' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dvcldsNextToken'
--
-- * 'dvcldsVPCIds'
--
-- * 'dvcldsMaxResults'
describeVPCClassicLinkDNSSupport
    :: DescribeVPCClassicLinkDNSSupport
describeVPCClassicLinkDNSSupport =
    DescribeVPCClassicLinkDNSSupport'
    { _dvcldsNextToken = Nothing
    , _dvcldsVPCIds = Nothing
    , _dvcldsMaxResults = Nothing
    }

-- | The token for the next set of items to return. (You received this token
-- from a prior call.)
dvcldsNextToken :: Lens' DescribeVPCClassicLinkDNSSupport (Maybe Text)
dvcldsNextToken = lens _dvcldsNextToken (\ s a -> s{_dvcldsNextToken = a});

-- | One or more VPC IDs.
dvcldsVPCIds :: Lens' DescribeVPCClassicLinkDNSSupport [Text]
dvcldsVPCIds = lens _dvcldsVPCIds (\ s a -> s{_dvcldsVPCIds = a}) . _Default . _Coerce;

-- | The maximum number of items to return for this request. The request
-- returns a token that you can specify in a subsequent call to get the
-- next set of results.
dvcldsMaxResults :: Lens' DescribeVPCClassicLinkDNSSupport (Maybe Natural)
dvcldsMaxResults = lens _dvcldsMaxResults (\ s a -> s{_dvcldsMaxResults = a}) . mapping _Nat;

instance AWSRequest DescribeVPCClassicLinkDNSSupport
         where
        type Rs DescribeVPCClassicLinkDNSSupport =
             DescribeVPCClassicLinkDNSSupportResponse
        request = postQuery ec2
        response
          = receiveXML
              (\ s h x ->
                 DescribeVPCClassicLinkDNSSupportResponse' <$>
                   (x .@? "vpcs" .!@ mempty >>=
                      may (parseXMLList "item"))
                     <*> (x .@? "nextToken")
                     <*> (pure (fromEnum s)))

instance Hashable DescribeVPCClassicLinkDNSSupport

instance ToHeaders DescribeVPCClassicLinkDNSSupport
         where
        toHeaders = const mempty

instance ToPath DescribeVPCClassicLinkDNSSupport
         where
        toPath = const "/"

instance ToQuery DescribeVPCClassicLinkDNSSupport
         where
        toQuery DescribeVPCClassicLinkDNSSupport'{..}
          = mconcat
              ["Action" =:
                 ("DescribeVpcClassicLinkDnsSupport" :: ByteString),
               "Version" =: ("2015-10-01" :: ByteString),
               "NextToken" =: _dvcldsNextToken,
               toQuery (toQueryList "VpcIds" <$> _dvcldsVPCIds),
               "MaxResults" =: _dvcldsMaxResults]

-- | /See:/ 'describeVPCClassicLinkDNSSupportResponse' smart constructor.
data DescribeVPCClassicLinkDNSSupportResponse = DescribeVPCClassicLinkDNSSupportResponse'
    { _dvpccldnssrsVPCs           :: !(Maybe [ClassicLinkDNSSupport])
    , _dvpccldnssrsNextToken      :: !(Maybe Text)
    , _dvpccldnssrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeVPCClassicLinkDNSSupportResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dvpccldnssrsVPCs'
--
-- * 'dvpccldnssrsNextToken'
--
-- * 'dvpccldnssrsResponseStatus'
describeVPCClassicLinkDNSSupportResponse
    :: Int -- ^ 'dvpccldnssrsResponseStatus'
    -> DescribeVPCClassicLinkDNSSupportResponse
describeVPCClassicLinkDNSSupportResponse pResponseStatus_ =
    DescribeVPCClassicLinkDNSSupportResponse'
    { _dvpccldnssrsVPCs = Nothing
    , _dvpccldnssrsNextToken = Nothing
    , _dvpccldnssrsResponseStatus = pResponseStatus_
    }

-- | Information about the ClassicLink DNS support status of the VPCs.
dvpccldnssrsVPCs :: Lens' DescribeVPCClassicLinkDNSSupportResponse [ClassicLinkDNSSupport]
dvpccldnssrsVPCs = lens _dvpccldnssrsVPCs (\ s a -> s{_dvpccldnssrsVPCs = a}) . _Default . _Coerce;

-- | The token to use when requesting the next set of items.
dvpccldnssrsNextToken :: Lens' DescribeVPCClassicLinkDNSSupportResponse (Maybe Text)
dvpccldnssrsNextToken = lens _dvpccldnssrsNextToken (\ s a -> s{_dvpccldnssrsNextToken = a});

-- | The response status code.
dvpccldnssrsResponseStatus :: Lens' DescribeVPCClassicLinkDNSSupportResponse Int
dvpccldnssrsResponseStatus = lens _dvpccldnssrsResponseStatus (\ s a -> s{_dvpccldnssrsResponseStatus = a});