{-# 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.MonitorInstances
-- 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)
--
-- Enables monitoring for a running instance. For more information about monitoring instances, see <http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-cloudwatch.html Monitoring Your Instances and Volumes> in the /Amazon Elastic Compute Cloud User Guide/.
module Network.AWS.EC2.MonitorInstances
    (
    -- * Creating a Request
      monitorInstances
    , MonitorInstances
    -- * Request Lenses
    , miDryRun
    , miInstanceIds

    -- * Destructuring the Response
    , monitorInstancesResponse
    , MonitorInstancesResponse
    -- * Response Lenses
    , mirsInstanceMonitorings
    , mirsResponseStatus
    ) 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 MonitorInstances.
--
-- /See:/ 'monitorInstances' smart constructor.
data MonitorInstances = MonitorInstances'
    { _miDryRun      :: !(Maybe Bool)
    , _miInstanceIds :: ![Text]
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'MonitorInstances' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'miDryRun'
--
-- * 'miInstanceIds'
monitorInstances
    :: MonitorInstances
monitorInstances =
    MonitorInstances'
    { _miDryRun = Nothing
    , _miInstanceIds = mempty
    }

-- | 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'.
miDryRun :: Lens' MonitorInstances (Maybe Bool)
miDryRun = lens _miDryRun (\ s a -> s{_miDryRun = a});

-- | One or more instance IDs.
miInstanceIds :: Lens' MonitorInstances [Text]
miInstanceIds = lens _miInstanceIds (\ s a -> s{_miInstanceIds = a}) . _Coerce;

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

instance Hashable MonitorInstances

instance NFData MonitorInstances

instance ToHeaders MonitorInstances where
        toHeaders = const mempty

instance ToPath MonitorInstances where
        toPath = const "/"

instance ToQuery MonitorInstances where
        toQuery MonitorInstances'{..}
          = mconcat
              ["Action" =: ("MonitorInstances" :: ByteString),
               "Version" =: ("2016-04-01" :: ByteString),
               "DryRun" =: _miDryRun,
               toQueryList "InstanceId" _miInstanceIds]

-- | Contains the output of MonitorInstances.
--
-- /See:/ 'monitorInstancesResponse' smart constructor.
data MonitorInstancesResponse = MonitorInstancesResponse'
    { _mirsInstanceMonitorings :: !(Maybe [InstanceMonitoring])
    , _mirsResponseStatus      :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'MonitorInstancesResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'mirsInstanceMonitorings'
--
-- * 'mirsResponseStatus'
monitorInstancesResponse
    :: Int -- ^ 'mirsResponseStatus'
    -> MonitorInstancesResponse
monitorInstancesResponse pResponseStatus_ =
    MonitorInstancesResponse'
    { _mirsInstanceMonitorings = Nothing
    , _mirsResponseStatus = pResponseStatus_
    }

-- | Monitoring information for one or more instances.
mirsInstanceMonitorings :: Lens' MonitorInstancesResponse [InstanceMonitoring]
mirsInstanceMonitorings = lens _mirsInstanceMonitorings (\ s a -> s{_mirsInstanceMonitorings = a}) . _Default . _Coerce;

-- | The response status code.
mirsResponseStatus :: Lens' MonitorInstancesResponse Int
mirsResponseStatus = lens _mirsResponseStatus (\ s a -> s{_mirsResponseStatus = a});

instance NFData MonitorInstancesResponse