{-# 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.DescribeInternetGateways
-- 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 one or more of your Internet gateways.
--
--
module Network.AWS.EC2.DescribeInternetGateways
    (
    -- * Creating a Request
      describeInternetGateways
    , DescribeInternetGateways
    -- * Request Lenses
    , dFilters
    , dInternetGatewayIds
    , dDryRun

    -- * Destructuring the Response
    , describeInternetGatewaysResponse
    , DescribeInternetGatewaysResponse
    -- * Response Lenses
    , digrsInternetGateways
    , digrsResponseStatus
    ) 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

-- | Contains the parameters for DescribeInternetGateways.
--
--
--
-- /See:/ 'describeInternetGateways' smart constructor.
data DescribeInternetGateways = DescribeInternetGateways'
    { _dFilters            :: !(Maybe [Filter])
    , _dInternetGatewayIds :: !(Maybe [Text])
    , _dDryRun             :: !(Maybe Bool)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeInternetGateways' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dFilters' - One or more filters.     * @attachment.state@ - The current state of the attachment between the gateway and the VPC (@available@ ). Present only if a VPC is attached.     * @attachment.vpc-id@ - The ID of an attached VPC.     * @internet-gateway-id@ - The ID of the Internet gateway.     * @tag@ :/key/ =/value/ - The key/value combination of a tag assigned to the resource.     * @tag-key@ - The key of a tag assigned to the resource. This filter is independent of the @tag-value@ filter. For example, if you use both the filter "tag-key=Purpose" and the filter "tag-value=X", you get any resources assigned both the tag key Purpose (regardless of what the tag's value is), and the tag value X (regardless of what the tag's key is). If you want to list only resources where Purpose is X, see the @tag@ :/key/ =/value/ filter.     * @tag-value@ - The value of a tag assigned to the resource. This filter is independent of the @tag-key@ filter.
--
-- * 'dInternetGatewayIds' - One or more Internet gateway IDs. Default: Describes all your Internet gateways.
--
-- * 'dDryRun' - Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is @DryRunOperation@ . Otherwise, it is @UnauthorizedOperation@ .
describeInternetGateways
    :: DescribeInternetGateways
describeInternetGateways =
    DescribeInternetGateways'
    { _dFilters = Nothing
    , _dInternetGatewayIds = Nothing
    , _dDryRun = Nothing
    }

-- | One or more filters.     * @attachment.state@ - The current state of the attachment between the gateway and the VPC (@available@ ). Present only if a VPC is attached.     * @attachment.vpc-id@ - The ID of an attached VPC.     * @internet-gateway-id@ - The ID of the Internet gateway.     * @tag@ :/key/ =/value/ - The key/value combination of a tag assigned to the resource.     * @tag-key@ - The key of a tag assigned to the resource. This filter is independent of the @tag-value@ filter. For example, if you use both the filter "tag-key=Purpose" and the filter "tag-value=X", you get any resources assigned both the tag key Purpose (regardless of what the tag's value is), and the tag value X (regardless of what the tag's key is). If you want to list only resources where Purpose is X, see the @tag@ :/key/ =/value/ filter.     * @tag-value@ - The value of a tag assigned to the resource. This filter is independent of the @tag-key@ filter.
dFilters :: Lens' DescribeInternetGateways [Filter]
dFilters = lens _dFilters (\ s a -> s{_dFilters = a}) . _Default . _Coerce;

-- | One or more Internet gateway IDs. Default: Describes all your Internet gateways.
dInternetGatewayIds :: Lens' DescribeInternetGateways [Text]
dInternetGatewayIds = lens _dInternetGatewayIds (\ s a -> s{_dInternetGatewayIds = a}) . _Default . _Coerce;

-- | Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is @DryRunOperation@ . Otherwise, it is @UnauthorizedOperation@ .
dDryRun :: Lens' DescribeInternetGateways (Maybe Bool)
dDryRun = lens _dDryRun (\ s a -> s{_dDryRun = a});

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

instance Hashable DescribeInternetGateways

instance NFData DescribeInternetGateways

instance ToHeaders DescribeInternetGateways where
        toHeaders = const mempty

instance ToPath DescribeInternetGateways where
        toPath = const "/"

instance ToQuery DescribeInternetGateways where
        toQuery DescribeInternetGateways'{..}
          = mconcat
              ["Action" =:
                 ("DescribeInternetGateways" :: ByteString),
               "Version" =: ("2016-11-15" :: ByteString),
               toQuery (toQueryList "Filter" <$> _dFilters),
               toQuery
                 (toQueryList "InternetGatewayId" <$>
                    _dInternetGatewayIds),
               "DryRun" =: _dDryRun]

-- | Contains the output of DescribeInternetGateways.
--
--
--
-- /See:/ 'describeInternetGatewaysResponse' smart constructor.
data DescribeInternetGatewaysResponse = DescribeInternetGatewaysResponse'
    { _digrsInternetGateways :: !(Maybe [InternetGateway])
    , _digrsResponseStatus   :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeInternetGatewaysResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'digrsInternetGateways' - Information about one or more Internet gateways.
--
-- * 'digrsResponseStatus' - -- | The response status code.
describeInternetGatewaysResponse
    :: Int -- ^ 'digrsResponseStatus'
    -> DescribeInternetGatewaysResponse
describeInternetGatewaysResponse pResponseStatus_ =
    DescribeInternetGatewaysResponse'
    { _digrsInternetGateways = Nothing
    , _digrsResponseStatus = pResponseStatus_
    }

-- | Information about one or more Internet gateways.
digrsInternetGateways :: Lens' DescribeInternetGatewaysResponse [InternetGateway]
digrsInternetGateways = lens _digrsInternetGateways (\ s a -> s{_digrsInternetGateways = a}) . _Default . _Coerce;

-- | -- | The response status code.
digrsResponseStatus :: Lens' DescribeInternetGatewaysResponse Int
digrsResponseStatus = lens _digrsResponseStatus (\ s a -> s{_digrsResponseStatus = a});

instance NFData DescribeInternetGatewaysResponse