{-# 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.ModifySpotFleetRequest
-- Copyright   : (c) 2013-2015 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)
--
-- Modifies the specified Spot fleet request.
--
-- While the Spot fleet request is being modified, it is in the 'modifying'
-- state.
--
-- To scale up your Spot fleet, increase its target capacity. The Spot
-- fleet launches the additional Spot instances according to the allocation
-- strategy for the Spot fleet request. If the allocation strategy is
-- 'lowestPrice', the Spot fleet launches instances using the Spot pool
-- with the lowest price. If the allocation strategy is 'diversified', the
-- Spot fleet distributes the instances across the Spot pools.
--
-- To scale down your Spot fleet, decrease its target capacity. First, the
-- Spot fleet cancels any open bids that exceed the new target capacity.
-- You can request that the Spot fleet terminate Spot instances until the
-- size of the fleet no longer exceeds the new target capacity. If the
-- allocation strategy is 'lowestPrice', the Spot fleet terminates the
-- instances with the highest price per unit. If the allocation strategy is
-- 'diversified', the Spot fleet terminates instances across the Spot
-- pools. Alternatively, you can request that the Spot fleet keep the fleet
-- at its current size, but not replace any Spot instances that are
-- interrupted or that you terminate manually.
--
-- /See:/ <http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-ModifySpotFleetRequest.html AWS API Reference> for ModifySpotFleetRequest.
module Network.AWS.EC2.ModifySpotFleetRequest
    (
    -- * Creating a Request
      modifySpotFleetRequest
    , ModifySpotFleetRequest
    -- * Request Lenses
    , msfrTargetCapacity
    , msfrExcessCapacityTerminationPolicy
    , msfrSpotFleetRequestId

    -- * Destructuring the Response
    , modifySpotFleetRequestResponse
    , ModifySpotFleetRequestResponse
    -- * Response Lenses
    , msfrrsReturn
    , msfrrsResponseStatus
    ) where

import           Network.AWS.EC2.Types
import           Network.AWS.EC2.Types.Product
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | Contains the parameters for ModifySpotFleetRequest.
--
-- /See:/ 'modifySpotFleetRequest' smart constructor.
data ModifySpotFleetRequest = ModifySpotFleetRequest'
    { _msfrTargetCapacity                  :: !(Maybe Int)
    , _msfrExcessCapacityTerminationPolicy :: !(Maybe ExcessCapacityTerminationPolicy)
    , _msfrSpotFleetRequestId              :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ModifySpotFleetRequest' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'msfrTargetCapacity'
--
-- * 'msfrExcessCapacityTerminationPolicy'
--
-- * 'msfrSpotFleetRequestId'
modifySpotFleetRequest
    :: Text -- ^ 'msfrSpotFleetRequestId'
    -> ModifySpotFleetRequest
modifySpotFleetRequest pSpotFleetRequestId_ =
    ModifySpotFleetRequest'
    { _msfrTargetCapacity = Nothing
    , _msfrExcessCapacityTerminationPolicy = Nothing
    , _msfrSpotFleetRequestId = pSpotFleetRequestId_
    }

-- | The size of the fleet.
msfrTargetCapacity :: Lens' ModifySpotFleetRequest (Maybe Int)
msfrTargetCapacity = lens _msfrTargetCapacity (\ s a -> s{_msfrTargetCapacity = a});

-- | Indicates whether running Spot instances should be terminated if the
-- target capacity of the Spot fleet request is decreased below the current
-- size of the Spot fleet.
msfrExcessCapacityTerminationPolicy :: Lens' ModifySpotFleetRequest (Maybe ExcessCapacityTerminationPolicy)
msfrExcessCapacityTerminationPolicy = lens _msfrExcessCapacityTerminationPolicy (\ s a -> s{_msfrExcessCapacityTerminationPolicy = a});

-- | The ID of the Spot fleet request.
msfrSpotFleetRequestId :: Lens' ModifySpotFleetRequest Text
msfrSpotFleetRequestId = lens _msfrSpotFleetRequestId (\ s a -> s{_msfrSpotFleetRequestId = a});

instance AWSRequest ModifySpotFleetRequest where
        type Rs ModifySpotFleetRequest =
             ModifySpotFleetRequestResponse
        request = postQuery eC2
        response
          = receiveXML
              (\ s h x ->
                 ModifySpotFleetRequestResponse' <$>
                   (x .@? "return") <*> (pure (fromEnum s)))

instance ToHeaders ModifySpotFleetRequest where
        toHeaders = const mempty

instance ToPath ModifySpotFleetRequest where
        toPath = const "/"

instance ToQuery ModifySpotFleetRequest where
        toQuery ModifySpotFleetRequest'{..}
          = mconcat
              ["Action" =:
                 ("ModifySpotFleetRequest" :: ByteString),
               "Version" =: ("2015-10-01" :: ByteString),
               "TargetCapacity" =: _msfrTargetCapacity,
               "ExcessCapacityTerminationPolicy" =:
                 _msfrExcessCapacityTerminationPolicy,
               "SpotFleetRequestId" =: _msfrSpotFleetRequestId]

-- | Contains the output of ModifySpotFleetRequest.
--
-- /See:/ 'modifySpotFleetRequestResponse' smart constructor.
data ModifySpotFleetRequestResponse = ModifySpotFleetRequestResponse'
    { _msfrrsReturn         :: !(Maybe Bool)
    , _msfrrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ModifySpotFleetRequestResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'msfrrsReturn'
--
-- * 'msfrrsResponseStatus'
modifySpotFleetRequestResponse
    :: Int -- ^ 'msfrrsResponseStatus'
    -> ModifySpotFleetRequestResponse
modifySpotFleetRequestResponse pResponseStatus_ =
    ModifySpotFleetRequestResponse'
    { _msfrrsReturn = Nothing
    , _msfrrsResponseStatus = pResponseStatus_
    }

-- | Is 'true' if the request succeeds, and an error otherwise.
msfrrsReturn :: Lens' ModifySpotFleetRequestResponse (Maybe Bool)
msfrrsReturn = lens _msfrrsReturn (\ s a -> s{_msfrrsReturn = a});

-- | The response status code.
msfrrsResponseStatus :: Lens' ModifySpotFleetRequestResponse Int
msfrrsResponseStatus = lens _msfrrsResponseStatus (\ s a -> s{_msfrrsResponseStatus = a});