{-# 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.DirectoryService.DescribeEventTopics
-- 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)
--
-- Obtains information about which SNS topics receive status messages from the specified directory.
--
-- If no input parameters are provided, such as DirectoryId or TopicName, this request describes all of the associations in the account.
module Network.AWS.DirectoryService.DescribeEventTopics
    (
    -- * Creating a Request
      describeEventTopics
    , DescribeEventTopics
    -- * Request Lenses
    , dDirectoryId
    , dTopicNames

    -- * Destructuring the Response
    , describeEventTopicsResponse
    , DescribeEventTopicsResponse
    -- * Response Lenses
    , detrsEventTopics
    , detrsResponseStatus
    ) where

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

-- | /See:/ 'describeEventTopics' smart constructor.
data DescribeEventTopics = DescribeEventTopics'
    { _dDirectoryId :: !(Maybe Text)
    , _dTopicNames  :: !(Maybe [Text])
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeEventTopics' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dDirectoryId'
--
-- * 'dTopicNames'
describeEventTopics
    :: DescribeEventTopics
describeEventTopics =
    DescribeEventTopics'
    { _dDirectoryId = Nothing
    , _dTopicNames = Nothing
    }

-- | The Directory ID for which to get the list of associated SNS topics. If this member is null, associations for all Directory IDs are returned.
dDirectoryId :: Lens' DescribeEventTopics (Maybe Text)
dDirectoryId = lens _dDirectoryId (\ s a -> s{_dDirectoryId = a});

-- | A list of SNS topic names for which to obtain the information. If this member is null, all associations for the specified Directory ID are returned.
--
-- An empty list results in an 'InvalidParameterException' being thrown.
dTopicNames :: Lens' DescribeEventTopics [Text]
dTopicNames = lens _dTopicNames (\ s a -> s{_dTopicNames = a}) . _Default . _Coerce;

instance AWSRequest DescribeEventTopics where
        type Rs DescribeEventTopics =
             DescribeEventTopicsResponse
        request = postJSON directoryService
        response
          = receiveJSON
              (\ s h x ->
                 DescribeEventTopicsResponse' <$>
                   (x .?> "EventTopics" .!@ mempty) <*>
                     (pure (fromEnum s)))

instance Hashable DescribeEventTopics

instance NFData DescribeEventTopics

instance ToHeaders DescribeEventTopics where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("DirectoryService_20150416.DescribeEventTopics" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON DescribeEventTopics where
        toJSON DescribeEventTopics'{..}
          = object
              (catMaybes
                 [("DirectoryId" .=) <$> _dDirectoryId,
                  ("TopicNames" .=) <$> _dTopicNames])

instance ToPath DescribeEventTopics where
        toPath = const "/"

instance ToQuery DescribeEventTopics where
        toQuery = const mempty

-- | /See:/ 'describeEventTopicsResponse' smart constructor.
data DescribeEventTopicsResponse = DescribeEventTopicsResponse'
    { _detrsEventTopics    :: !(Maybe [EventTopic])
    , _detrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeEventTopicsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'detrsEventTopics'
--
-- * 'detrsResponseStatus'
describeEventTopicsResponse
    :: Int -- ^ 'detrsResponseStatus'
    -> DescribeEventTopicsResponse
describeEventTopicsResponse pResponseStatus_ =
    DescribeEventTopicsResponse'
    { _detrsEventTopics = Nothing
    , _detrsResponseStatus = pResponseStatus_
    }

-- | A list of SNS topic names that receive status messages from the specified Directory ID.
detrsEventTopics :: Lens' DescribeEventTopicsResponse [EventTopic]
detrsEventTopics = lens _detrsEventTopics (\ s a -> s{_detrsEventTopics = a}) . _Default . _Coerce;

-- | The response status code.
detrsResponseStatus :: Lens' DescribeEventTopicsResponse Int
detrsResponseStatus = lens _detrsResponseStatus (\ s a -> s{_detrsResponseStatus = a});

instance NFData DescribeEventTopicsResponse