{-# 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.DescribeDHCPOptions
-- 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 DHCP options sets.
--
-- For more information about DHCP options sets, see <http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_DHCP_Options.html DHCP Options Sets> in the /Amazon Virtual Private Cloud User Guide/.
module Network.AWS.EC2.DescribeDHCPOptions
    (
    -- * Creating a Request
      describeDHCPOptions
    , DescribeDHCPOptions
    -- * Request Lenses
    , ddoFilters
    , ddoDHCPOptionsIds
    , ddoDryRun

    -- * Destructuring the Response
    , describeDHCPOptionsResponse
    , DescribeDHCPOptionsResponse
    -- * Response Lenses
    , ddorsDHCPOptions
    , ddorsResponseStatus
    ) 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 DescribeDhcpOptions.
--
-- /See:/ 'describeDHCPOptions' smart constructor.
data DescribeDHCPOptions = DescribeDHCPOptions'
    { _ddoFilters        :: !(Maybe [Filter])
    , _ddoDHCPOptionsIds :: !(Maybe [Text])
    , _ddoDryRun         :: !(Maybe Bool)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeDHCPOptions' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ddoFilters'
--
-- * 'ddoDHCPOptionsIds'
--
-- * 'ddoDryRun'
describeDHCPOptions
    :: DescribeDHCPOptions
describeDHCPOptions =
    DescribeDHCPOptions'
    { _ddoFilters = Nothing
    , _ddoDHCPOptionsIds = Nothing
    , _ddoDryRun = Nothing
    }

-- | One or more filters.
--
-- -   'dhcp-options-id' - The ID of a set of DHCP options.
--
-- -   'key' - The key for one of the options (for example, 'domain-name').
--
-- -   'value' - The value for one of the options.
--
-- -   '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.
--
ddoFilters :: Lens' DescribeDHCPOptions [Filter]
ddoFilters = lens _ddoFilters (\ s a -> s{_ddoFilters = a}) . _Default . _Coerce;

-- | The IDs of one or more DHCP options sets.
--
-- Default: Describes all your DHCP options sets.
ddoDHCPOptionsIds :: Lens' DescribeDHCPOptions [Text]
ddoDHCPOptionsIds = lens _ddoDHCPOptionsIds (\ s a -> s{_ddoDHCPOptionsIds = 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'.
ddoDryRun :: Lens' DescribeDHCPOptions (Maybe Bool)
ddoDryRun = lens _ddoDryRun (\ s a -> s{_ddoDryRun = a});

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

instance Hashable DescribeDHCPOptions

instance NFData DescribeDHCPOptions

instance ToHeaders DescribeDHCPOptions where
        toHeaders = const mempty

instance ToPath DescribeDHCPOptions where
        toPath = const "/"

instance ToQuery DescribeDHCPOptions where
        toQuery DescribeDHCPOptions'{..}
          = mconcat
              ["Action" =: ("DescribeDhcpOptions" :: ByteString),
               "Version" =: ("2016-04-01" :: ByteString),
               toQuery (toQueryList "Filter" <$> _ddoFilters),
               toQuery
                 (toQueryList "DhcpOptionsId" <$> _ddoDHCPOptionsIds),
               "DryRun" =: _ddoDryRun]

-- | Contains the output of DescribeDhcpOptions.
--
-- /See:/ 'describeDHCPOptionsResponse' smart constructor.
data DescribeDHCPOptionsResponse = DescribeDHCPOptionsResponse'
    { _ddorsDHCPOptions    :: !(Maybe [DHCPOptions])
    , _ddorsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeDHCPOptionsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ddorsDHCPOptions'
--
-- * 'ddorsResponseStatus'
describeDHCPOptionsResponse
    :: Int -- ^ 'ddorsResponseStatus'
    -> DescribeDHCPOptionsResponse
describeDHCPOptionsResponse pResponseStatus_ =
    DescribeDHCPOptionsResponse'
    { _ddorsDHCPOptions = Nothing
    , _ddorsResponseStatus = pResponseStatus_
    }

-- | Information about one or more DHCP options sets.
ddorsDHCPOptions :: Lens' DescribeDHCPOptionsResponse [DHCPOptions]
ddorsDHCPOptions = lens _ddorsDHCPOptions (\ s a -> s{_ddorsDHCPOptions = a}) . _Default . _Coerce;

-- | The response status code.
ddorsResponseStatus :: Lens' DescribeDHCPOptionsResponse Int
ddorsResponseStatus = lens _ddorsResponseStatus (\ s a -> s{_ddorsResponseStatus = a});

instance NFData DescribeDHCPOptionsResponse