{-# 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.StepFunctions.UpdateStateMachine
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Updates an existing state machine by modifying its @definition@ and/or @roleArn@ . Running executions will continue to use the previous @definition@ and @roleArn@ .
--
--
module Network.AWS.StepFunctions.UpdateStateMachine
    (
    -- * Creating a Request
      updateStateMachine
    , UpdateStateMachine
    -- * Request Lenses
    , usmDefinition
    , usmRoleARN
    , usmStateMachineARN

    -- * Destructuring the Response
    , updateStateMachineResponse
    , UpdateStateMachineResponse
    -- * Response Lenses
    , usmrsResponseStatus
    , usmrsUpdateDate
    ) where

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

-- | /See:/ 'updateStateMachine' smart constructor.
data UpdateStateMachine = UpdateStateMachine'
  { _usmDefinition      :: !(Maybe Text)
  , _usmRoleARN         :: !(Maybe Text)
  , _usmStateMachineARN :: !Text
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'UpdateStateMachine' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'usmDefinition' - The Amazon States Language definition of the state machine.
--
-- * 'usmRoleARN' - The Amazon Resource Name (ARN) of the IAM role of the state machine.
--
-- * 'usmStateMachineARN' - The Amazon Resource Name (ARN) of the state machine.
updateStateMachine
    :: Text -- ^ 'usmStateMachineARN'
    -> UpdateStateMachine
updateStateMachine pStateMachineARN_ =
  UpdateStateMachine'
    { _usmDefinition = Nothing
    , _usmRoleARN = Nothing
    , _usmStateMachineARN = pStateMachineARN_
    }


-- | The Amazon States Language definition of the state machine.
usmDefinition :: Lens' UpdateStateMachine (Maybe Text)
usmDefinition = lens _usmDefinition (\ s a -> s{_usmDefinition = a})

-- | The Amazon Resource Name (ARN) of the IAM role of the state machine.
usmRoleARN :: Lens' UpdateStateMachine (Maybe Text)
usmRoleARN = lens _usmRoleARN (\ s a -> s{_usmRoleARN = a})

-- | The Amazon Resource Name (ARN) of the state machine.
usmStateMachineARN :: Lens' UpdateStateMachine Text
usmStateMachineARN = lens _usmStateMachineARN (\ s a -> s{_usmStateMachineARN = a})

instance AWSRequest UpdateStateMachine where
        type Rs UpdateStateMachine =
             UpdateStateMachineResponse
        request = postJSON stepFunctions
        response
          = receiveJSON
              (\ s h x ->
                 UpdateStateMachineResponse' <$>
                   (pure (fromEnum s)) <*> (x .:> "updateDate"))

instance Hashable UpdateStateMachine where

instance NFData UpdateStateMachine where

instance ToHeaders UpdateStateMachine where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("AWSStepFunctions.UpdateStateMachine" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.0" :: ByteString)])

instance ToJSON UpdateStateMachine where
        toJSON UpdateStateMachine'{..}
          = object
              (catMaybes
                 [("definition" .=) <$> _usmDefinition,
                  ("roleArn" .=) <$> _usmRoleARN,
                  Just ("stateMachineArn" .= _usmStateMachineARN)])

instance ToPath UpdateStateMachine where
        toPath = const "/"

instance ToQuery UpdateStateMachine where
        toQuery = const mempty

-- | /See:/ 'updateStateMachineResponse' smart constructor.
data UpdateStateMachineResponse = UpdateStateMachineResponse'
  { _usmrsResponseStatus :: !Int
  , _usmrsUpdateDate     :: !POSIX
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'UpdateStateMachineResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'usmrsResponseStatus' - -- | The response status code.
--
-- * 'usmrsUpdateDate' - The date and time the state machine was updated.
updateStateMachineResponse
    :: Int -- ^ 'usmrsResponseStatus'
    -> UTCTime -- ^ 'usmrsUpdateDate'
    -> UpdateStateMachineResponse
updateStateMachineResponse pResponseStatus_ pUpdateDate_ =
  UpdateStateMachineResponse'
    { _usmrsResponseStatus = pResponseStatus_
    , _usmrsUpdateDate = _Time # pUpdateDate_
    }


-- | -- | The response status code.
usmrsResponseStatus :: Lens' UpdateStateMachineResponse Int
usmrsResponseStatus = lens _usmrsResponseStatus (\ s a -> s{_usmrsResponseStatus = a})

-- | The date and time the state machine was updated.
usmrsUpdateDate :: Lens' UpdateStateMachineResponse UTCTime
usmrsUpdateDate = lens _usmrsUpdateDate (\ s a -> s{_usmrsUpdateDate = a}) . _Time

instance NFData UpdateStateMachineResponse where