{-# 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.ECS.ListServices
-- 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)
--
-- Lists the services that are running in a specified cluster.
--
-- This operation returns paginated results.
module Network.AWS.ECS.ListServices
    (
    -- * Creating a Request
      listServices
    , ListServices
    -- * Request Lenses
    , lsCluster
    , lsNextToken
    , lsMaxResults

    -- * Destructuring the Response
    , listServicesResponse
    , ListServicesResponse
    -- * Response Lenses
    , lsrsServiceARNs
    , lsrsNextToken
    , lsrsResponseStatus
    ) where

import           Network.AWS.ECS.Types
import           Network.AWS.ECS.Types.Product
import           Network.AWS.Lens
import           Network.AWS.Pager
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | /See:/ 'listServices' smart constructor.
data ListServices = ListServices'
    { _lsCluster    :: !(Maybe Text)
    , _lsNextToken  :: !(Maybe Text)
    , _lsMaxResults :: !(Maybe Int)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListServices' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lsCluster'
--
-- * 'lsNextToken'
--
-- * 'lsMaxResults'
listServices
    :: ListServices
listServices =
    ListServices'
    { _lsCluster = Nothing
    , _lsNextToken = Nothing
    , _lsMaxResults = Nothing
    }

-- | The short name or full Amazon Resource Name (ARN) of the cluster that hosts the services to list. If you do not specify a cluster, the default cluster is assumed..
lsCluster :: Lens' ListServices (Maybe Text)
lsCluster = lens _lsCluster (\ s a -> s{_lsCluster = a});

-- | The 'nextToken' value returned from a previous paginated 'ListServices' request where 'maxResults' was used and the results exceeded the value of that parameter. Pagination continues from the end of the previous results that returned the 'nextToken' value. This value is 'null' when there are no more results to return.
--
-- This token should be treated as an opaque identifier that is only used to retrieve the next items in a list and not for other programmatic purposes.
lsNextToken :: Lens' ListServices (Maybe Text)
lsNextToken = lens _lsNextToken (\ s a -> s{_lsNextToken = a});

-- | The maximum number of container instance results returned by 'ListServices' in paginated output. When this parameter is used, 'ListServices' only returns 'maxResults' results in a single page along with a 'nextToken' response element. The remaining results of the initial request can be seen by sending another 'ListServices' request with the returned 'nextToken' value. This value can be between 1 and 10. If this parameter is not used, then 'ListServices' returns up to 10 results and a 'nextToken' value if applicable.
lsMaxResults :: Lens' ListServices (Maybe Int)
lsMaxResults = lens _lsMaxResults (\ s a -> s{_lsMaxResults = a});

instance AWSPager ListServices where
        page rq rs
          | stop (rs ^. lsrsNextToken) = Nothing
          | stop (rs ^. lsrsServiceARNs) = Nothing
          | otherwise =
            Just $ rq & lsNextToken .~ rs ^. lsrsNextToken

instance AWSRequest ListServices where
        type Rs ListServices = ListServicesResponse
        request = postJSON ecs
        response
          = receiveJSON
              (\ s h x ->
                 ListServicesResponse' <$>
                   (x .?> "serviceArns" .!@ mempty) <*>
                     (x .?> "nextToken")
                     <*> (pure (fromEnum s)))

instance Hashable ListServices

instance NFData ListServices

instance ToHeaders ListServices where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("AmazonEC2ContainerServiceV20141113.ListServices" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON ListServices where
        toJSON ListServices'{..}
          = object
              (catMaybes
                 [("cluster" .=) <$> _lsCluster,
                  ("nextToken" .=) <$> _lsNextToken,
                  ("maxResults" .=) <$> _lsMaxResults])

instance ToPath ListServices where
        toPath = const "/"

instance ToQuery ListServices where
        toQuery = const mempty

-- | /See:/ 'listServicesResponse' smart constructor.
data ListServicesResponse = ListServicesResponse'
    { _lsrsServiceARNs    :: !(Maybe [Text])
    , _lsrsNextToken      :: !(Maybe Text)
    , _lsrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListServicesResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lsrsServiceARNs'
--
-- * 'lsrsNextToken'
--
-- * 'lsrsResponseStatus'
listServicesResponse
    :: Int -- ^ 'lsrsResponseStatus'
    -> ListServicesResponse
listServicesResponse pResponseStatus_ =
    ListServicesResponse'
    { _lsrsServiceARNs = Nothing
    , _lsrsNextToken = Nothing
    , _lsrsResponseStatus = pResponseStatus_
    }

-- | The list of full Amazon Resource Name (ARN) entries for each service associated with the specified cluster.
lsrsServiceARNs :: Lens' ListServicesResponse [Text]
lsrsServiceARNs = lens _lsrsServiceARNs (\ s a -> s{_lsrsServiceARNs = a}) . _Default . _Coerce;

-- | The 'nextToken' value to include in a future 'ListServices' request. When the results of a 'ListServices' request exceed 'maxResults', this value can be used to retrieve the next page of results. This value is 'null' when there are no more results to return.
lsrsNextToken :: Lens' ListServicesResponse (Maybe Text)
lsrsNextToken = lens _lsrsNextToken (\ s a -> s{_lsrsNextToken = a});

-- | The response status code.
lsrsResponseStatus :: Lens' ListServicesResponse Int
lsrsResponseStatus = lens _lsrsResponseStatus (\ s a -> s{_lsrsResponseStatus = a});

instance NFData ListServicesResponse