{-# 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.DescribeCustomerGateways
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Describes one or more of your VPN customer gateways.
--
--
-- For more information about VPN customer gateways, see <http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_VPN.html AWS Managed VPN Connections> in the /Amazon Virtual Private Cloud User Guide/ .
--
module Network.AWS.EC2.DescribeCustomerGateways
    (
    -- * Creating a Request
      describeCustomerGateways
    , DescribeCustomerGateways
    -- * Request Lenses
    , dcgCustomerGatewayIds
    , dcgFilters
    , dcgDryRun

    -- * Destructuring the Response
    , describeCustomerGatewaysResponse
    , DescribeCustomerGatewaysResponse
    -- * Response Lenses
    , dcgrsCustomerGateways
    , dcgrsResponseStatus
    ) 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 DescribeCustomerGateways.
--
--
--
-- /See:/ 'describeCustomerGateways' smart constructor.
data DescribeCustomerGateways = DescribeCustomerGateways'
  { _dcgCustomerGatewayIds :: !(Maybe [Text])
  , _dcgFilters            :: !(Maybe [Filter])
  , _dcgDryRun             :: !(Maybe Bool)
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeCustomerGateways' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dcgCustomerGatewayIds' - One or more customer gateway IDs. Default: Describes all your customer gateways.
--
-- * 'dcgFilters' - One or more filters.     * @bgp-asn@ - The customer gateway's Border Gateway Protocol (BGP) Autonomous System Number (ASN).     * @customer-gateway-id@ - The ID of the customer gateway.     * @ip-address@ - The IP address of the customer gateway's Internet-routable external interface.     * @state@ - The state of the customer gateway (@pending@ | @available@ | @deleting@ | @deleted@ ).     * @type@ - The type of customer gateway. Currently, the only supported type is @ipsec.1@ .     * @tag@ :/key/ =/value/ - The key/value combination of a tag assigned to the resource. Specify the key of the tag in the filter name and the value of the tag in the filter value. For example, for the tag Purpose=X, specify @tag:Purpose@ for the filter name and @X@ for the filter value.     * @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.
--
-- * 'dcgDryRun' - 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@ .
describeCustomerGateways
    :: DescribeCustomerGateways
describeCustomerGateways =
  DescribeCustomerGateways'
    { _dcgCustomerGatewayIds = Nothing
    , _dcgFilters = Nothing
    , _dcgDryRun = Nothing
    }


-- | One or more customer gateway IDs. Default: Describes all your customer gateways.
dcgCustomerGatewayIds :: Lens' DescribeCustomerGateways [Text]
dcgCustomerGatewayIds = lens _dcgCustomerGatewayIds (\ s a -> s{_dcgCustomerGatewayIds = a}) . _Default . _Coerce

-- | One or more filters.     * @bgp-asn@ - The customer gateway's Border Gateway Protocol (BGP) Autonomous System Number (ASN).     * @customer-gateway-id@ - The ID of the customer gateway.     * @ip-address@ - The IP address of the customer gateway's Internet-routable external interface.     * @state@ - The state of the customer gateway (@pending@ | @available@ | @deleting@ | @deleted@ ).     * @type@ - The type of customer gateway. Currently, the only supported type is @ipsec.1@ .     * @tag@ :/key/ =/value/ - The key/value combination of a tag assigned to the resource. Specify the key of the tag in the filter name and the value of the tag in the filter value. For example, for the tag Purpose=X, specify @tag:Purpose@ for the filter name and @X@ for the filter value.     * @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.
dcgFilters :: Lens' DescribeCustomerGateways [Filter]
dcgFilters = lens _dcgFilters (\ s a -> s{_dcgFilters = 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@ .
dcgDryRun :: Lens' DescribeCustomerGateways (Maybe Bool)
dcgDryRun = lens _dcgDryRun (\ s a -> s{_dcgDryRun = a})

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

instance Hashable DescribeCustomerGateways where

instance NFData DescribeCustomerGateways where

instance ToHeaders DescribeCustomerGateways where
        toHeaders = const mempty

instance ToPath DescribeCustomerGateways where
        toPath = const "/"

instance ToQuery DescribeCustomerGateways where
        toQuery DescribeCustomerGateways'{..}
          = mconcat
              ["Action" =:
                 ("DescribeCustomerGateways" :: ByteString),
               "Version" =: ("2016-11-15" :: ByteString),
               toQuery
                 (toQueryList "CustomerGatewayId" <$>
                    _dcgCustomerGatewayIds),
               toQuery (toQueryList "Filter" <$> _dcgFilters),
               "DryRun" =: _dcgDryRun]

-- | Contains the output of DescribeCustomerGateways.
--
--
--
-- /See:/ 'describeCustomerGatewaysResponse' smart constructor.
data DescribeCustomerGatewaysResponse = DescribeCustomerGatewaysResponse'
  { _dcgrsCustomerGateways :: !(Maybe [CustomerGateway])
  , _dcgrsResponseStatus   :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeCustomerGatewaysResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dcgrsCustomerGateways' - Information about one or more customer gateways.
--
-- * 'dcgrsResponseStatus' - -- | The response status code.
describeCustomerGatewaysResponse
    :: Int -- ^ 'dcgrsResponseStatus'
    -> DescribeCustomerGatewaysResponse
describeCustomerGatewaysResponse pResponseStatus_ =
  DescribeCustomerGatewaysResponse'
    {_dcgrsCustomerGateways = Nothing, _dcgrsResponseStatus = pResponseStatus_}


-- | Information about one or more customer gateways.
dcgrsCustomerGateways :: Lens' DescribeCustomerGatewaysResponse [CustomerGateway]
dcgrsCustomerGateways = lens _dcgrsCustomerGateways (\ s a -> s{_dcgrsCustomerGateways = a}) . _Default . _Coerce

-- | -- | The response status code.
dcgrsResponseStatus :: Lens' DescribeCustomerGatewaysResponse Int
dcgrsResponseStatus = lens _dcgrsResponseStatus (\ s a -> s{_dcgrsResponseStatus = a})

instance NFData DescribeCustomerGatewaysResponse
         where