{-# 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.SSM.DescribeMaintenanceWindows
-- 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)
--
-- Retrieves the Maintenance Windows in an AWS account.
--
--
module Network.AWS.SSM.DescribeMaintenanceWindows
    (
    -- * Creating a Request
      describeMaintenanceWindows
    , DescribeMaintenanceWindows
    -- * Request Lenses
    , dmwFilters
    , dmwNextToken
    , dmwMaxResults

    -- * Destructuring the Response
    , describeMaintenanceWindowsResponse
    , DescribeMaintenanceWindowsResponse
    -- * Response Lenses
    , dmwsrsWindowIdentities
    , dmwsrsNextToken
    , dmwsrsResponseStatus
    ) where

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

-- | /See:/ 'describeMaintenanceWindows' smart constructor.
data DescribeMaintenanceWindows = DescribeMaintenanceWindows'
    { _dmwFilters    :: !(Maybe [MaintenanceWindowFilter])
    , _dmwNextToken  :: !(Maybe Text)
    , _dmwMaxResults :: !(Maybe Nat)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeMaintenanceWindows' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dmwFilters' - Optional filters used to narrow down the scope of the returned Maintenance Windows. Supported filter keys are @Name@ and @Enabled@ .
--
-- * 'dmwNextToken' - The token for the next set of items to return. (You received this token from a previous call.)
--
-- * 'dmwMaxResults' - The maximum number of items to return for this call. The call also returns a token that you can specify in a subsequent call to get the next set of results.
describeMaintenanceWindows
    :: DescribeMaintenanceWindows
describeMaintenanceWindows =
    DescribeMaintenanceWindows'
    { _dmwFilters = Nothing
    , _dmwNextToken = Nothing
    , _dmwMaxResults = Nothing
    }

-- | Optional filters used to narrow down the scope of the returned Maintenance Windows. Supported filter keys are @Name@ and @Enabled@ .
dmwFilters :: Lens' DescribeMaintenanceWindows [MaintenanceWindowFilter]
dmwFilters = lens _dmwFilters (\ s a -> s{_dmwFilters = a}) . _Default . _Coerce;

-- | The token for the next set of items to return. (You received this token from a previous call.)
dmwNextToken :: Lens' DescribeMaintenanceWindows (Maybe Text)
dmwNextToken = lens _dmwNextToken (\ s a -> s{_dmwNextToken = a});

-- | The maximum number of items to return for this call. The call also returns a token that you can specify in a subsequent call to get the next set of results.
dmwMaxResults :: Lens' DescribeMaintenanceWindows (Maybe Natural)
dmwMaxResults = lens _dmwMaxResults (\ s a -> s{_dmwMaxResults = a}) . mapping _Nat;

instance AWSRequest DescribeMaintenanceWindows where
        type Rs DescribeMaintenanceWindows =
             DescribeMaintenanceWindowsResponse
        request = postJSON ssm
        response
          = receiveJSON
              (\ s h x ->
                 DescribeMaintenanceWindowsResponse' <$>
                   (x .?> "WindowIdentities" .!@ mempty) <*>
                     (x .?> "NextToken")
                     <*> (pure (fromEnum s)))

instance Hashable DescribeMaintenanceWindows

instance NFData DescribeMaintenanceWindows

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

instance ToJSON DescribeMaintenanceWindows where
        toJSON DescribeMaintenanceWindows'{..}
          = object
              (catMaybes
                 [("Filters" .=) <$> _dmwFilters,
                  ("NextToken" .=) <$> _dmwNextToken,
                  ("MaxResults" .=) <$> _dmwMaxResults])

instance ToPath DescribeMaintenanceWindows where
        toPath = const "/"

instance ToQuery DescribeMaintenanceWindows where
        toQuery = const mempty

-- | /See:/ 'describeMaintenanceWindowsResponse' smart constructor.
data DescribeMaintenanceWindowsResponse = DescribeMaintenanceWindowsResponse'
    { _dmwsrsWindowIdentities :: !(Maybe [MaintenanceWindowIdentity])
    , _dmwsrsNextToken        :: !(Maybe Text)
    , _dmwsrsResponseStatus   :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeMaintenanceWindowsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dmwsrsWindowIdentities' - Information about the Maintenance Windows.
--
-- * 'dmwsrsNextToken' - The token to use when requesting the next set of items. If there are no additional items to return, the string is empty.
--
-- * 'dmwsrsResponseStatus' - -- | The response status code.
describeMaintenanceWindowsResponse
    :: Int -- ^ 'dmwsrsResponseStatus'
    -> DescribeMaintenanceWindowsResponse
describeMaintenanceWindowsResponse pResponseStatus_ =
    DescribeMaintenanceWindowsResponse'
    { _dmwsrsWindowIdentities = Nothing
    , _dmwsrsNextToken = Nothing
    , _dmwsrsResponseStatus = pResponseStatus_
    }

-- | Information about the Maintenance Windows.
dmwsrsWindowIdentities :: Lens' DescribeMaintenanceWindowsResponse [MaintenanceWindowIdentity]
dmwsrsWindowIdentities = lens _dmwsrsWindowIdentities (\ s a -> s{_dmwsrsWindowIdentities = a}) . _Default . _Coerce;

-- | The token to use when requesting the next set of items. If there are no additional items to return, the string is empty.
dmwsrsNextToken :: Lens' DescribeMaintenanceWindowsResponse (Maybe Text)
dmwsrsNextToken = lens _dmwsrsNextToken (\ s a -> s{_dmwsrsNextToken = a});

-- | -- | The response status code.
dmwsrsResponseStatus :: Lens' DescribeMaintenanceWindowsResponse Int
dmwsrsResponseStatus = lens _dmwsrsResponseStatus (\ s a -> s{_dmwsrsResponseStatus = a});

instance NFData DescribeMaintenanceWindowsResponse