{-# 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.DataPipeline.ActivatePipeline
-- 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)
--
-- Validates the specified pipeline and starts processing pipeline tasks.
-- If the pipeline does not pass validation, activation fails.
--
-- If you need to pause the pipeline to investigate an issue with a
-- component, such as a data source or script, call DeactivatePipeline.
--
-- To activate a finished pipeline, modify the end date for the pipeline
-- and then activate it.
--
-- /See:/ <http://docs.aws.amazon.com/datapipeline/latest/APIReference/API_ActivatePipeline.html AWS API Reference> for ActivatePipeline.
module Network.AWS.DataPipeline.ActivatePipeline
    (
    -- * Creating a Request
      activatePipeline
    , ActivatePipeline
    -- * Request Lenses
    , apStartTimestamp
    , apParameterValues
    , apPipelineId

    -- * Destructuring the Response
    , activatePipelineResponse
    , ActivatePipelineResponse
    -- * Response Lenses
    , aprsResponseStatus
    ) where

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

-- | Contains the parameters for ActivatePipeline.
--
-- /See:/ 'activatePipeline' smart constructor.
data ActivatePipeline = ActivatePipeline'
    { _apStartTimestamp  :: !(Maybe POSIX)
    , _apParameterValues :: !(Maybe [ParameterValue])
    , _apPipelineId      :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ActivatePipeline' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'apStartTimestamp'
--
-- * 'apParameterValues'
--
-- * 'apPipelineId'
activatePipeline
    :: Text -- ^ 'apPipelineId'
    -> ActivatePipeline
activatePipeline pPipelineId_ =
    ActivatePipeline'
    { _apStartTimestamp = Nothing
    , _apParameterValues = Nothing
    , _apPipelineId = pPipelineId_
    }

-- | The date and time to resume the pipeline. By default, the pipeline
-- resumes from the last completed execution.
apStartTimestamp :: Lens' ActivatePipeline (Maybe UTCTime)
apStartTimestamp = lens _apStartTimestamp (\ s a -> s{_apStartTimestamp = a}) . mapping _Time;

-- | A list of parameter values to pass to the pipeline at activation.
apParameterValues :: Lens' ActivatePipeline [ParameterValue]
apParameterValues = lens _apParameterValues (\ s a -> s{_apParameterValues = a}) . _Default . _Coerce;

-- | The ID of the pipeline.
apPipelineId :: Lens' ActivatePipeline Text
apPipelineId = lens _apPipelineId (\ s a -> s{_apPipelineId = a});

instance AWSRequest ActivatePipeline where
        type Rs ActivatePipeline = ActivatePipelineResponse
        request = postJSON dataPipeline
        response
          = receiveEmpty
              (\ s h x ->
                 ActivatePipelineResponse' <$> (pure (fromEnum s)))

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

instance ToJSON ActivatePipeline where
        toJSON ActivatePipeline'{..}
          = object
              (catMaybes
                 [("startTimestamp" .=) <$> _apStartTimestamp,
                  ("parameterValues" .=) <$> _apParameterValues,
                  Just ("pipelineId" .= _apPipelineId)])

instance ToPath ActivatePipeline where
        toPath = const "/"

instance ToQuery ActivatePipeline where
        toQuery = const mempty

-- | Contains the output of ActivatePipeline.
--
-- /See:/ 'activatePipelineResponse' smart constructor.
newtype ActivatePipelineResponse = ActivatePipelineResponse'
    { _aprsResponseStatus :: Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ActivatePipelineResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'aprsResponseStatus'
activatePipelineResponse
    :: Int -- ^ 'aprsResponseStatus'
    -> ActivatePipelineResponse
activatePipelineResponse pResponseStatus_ =
    ActivatePipelineResponse'
    { _aprsResponseStatus = pResponseStatus_
    }

-- | The response status code.
aprsResponseStatus :: Lens' ActivatePipelineResponse Int
aprsResponseStatus = lens _aprsResponseStatus (\ s a -> s{_aprsResponseStatus = a});