{-# 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.GetParameterHistory
-- 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)
--
-- Query a list of all parameters used by the AWS account.
--
--
--
-- This operation returns paginated results.
module Network.AWS.SSM.GetParameterHistory
    (
    -- * Creating a Request
      getParameterHistory
    , GetParameterHistory
    -- * Request Lenses
    , gphWithDecryption
    , gphNextToken
    , gphMaxResults
    , gphName

    -- * Destructuring the Response
    , getParameterHistoryResponse
    , GetParameterHistoryResponse
    -- * Response Lenses
    , gphrsNextToken
    , gphrsParameters
    , gphrsResponseStatus
    ) where

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

-- | /See:/ 'getParameterHistory' smart constructor.
data GetParameterHistory = GetParameterHistory'
  { _gphWithDecryption :: !(Maybe Bool)
  , _gphNextToken      :: !(Maybe Text)
  , _gphMaxResults     :: !(Maybe Nat)
  , _gphName           :: !Text
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetParameterHistory' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gphWithDecryption' - Return decrypted values for secure string parameters. This flag is ignored for String and StringList parameter types.
--
-- * 'gphNextToken' - The token for the next set of items to return. (You received this token from a previous call.)
--
-- * 'gphMaxResults' - 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.
--
-- * 'gphName' - The name of a parameter you want to query.
getParameterHistory
    :: Text -- ^ 'gphName'
    -> GetParameterHistory
getParameterHistory pName_ =
  GetParameterHistory'
    { _gphWithDecryption = Nothing
    , _gphNextToken = Nothing
    , _gphMaxResults = Nothing
    , _gphName = pName_
    }


-- | Return decrypted values for secure string parameters. This flag is ignored for String and StringList parameter types.
gphWithDecryption :: Lens' GetParameterHistory (Maybe Bool)
gphWithDecryption = lens _gphWithDecryption (\ s a -> s{_gphWithDecryption = a})

-- | The token for the next set of items to return. (You received this token from a previous call.)
gphNextToken :: Lens' GetParameterHistory (Maybe Text)
gphNextToken = lens _gphNextToken (\ s a -> s{_gphNextToken = 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.
gphMaxResults :: Lens' GetParameterHistory (Maybe Natural)
gphMaxResults = lens _gphMaxResults (\ s a -> s{_gphMaxResults = a}) . mapping _Nat

-- | The name of a parameter you want to query.
gphName :: Lens' GetParameterHistory Text
gphName = lens _gphName (\ s a -> s{_gphName = a})

instance AWSPager GetParameterHistory where
        page rq rs
          | stop (rs ^. gphrsNextToken) = Nothing
          | stop (rs ^. gphrsParameters) = Nothing
          | otherwise =
            Just $ rq & gphNextToken .~ rs ^. gphrsNextToken

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

instance Hashable GetParameterHistory where

instance NFData GetParameterHistory where

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

instance ToJSON GetParameterHistory where
        toJSON GetParameterHistory'{..}
          = object
              (catMaybes
                 [("WithDecryption" .=) <$> _gphWithDecryption,
                  ("NextToken" .=) <$> _gphNextToken,
                  ("MaxResults" .=) <$> _gphMaxResults,
                  Just ("Name" .= _gphName)])

instance ToPath GetParameterHistory where
        toPath = const "/"

instance ToQuery GetParameterHistory where
        toQuery = const mempty

-- | /See:/ 'getParameterHistoryResponse' smart constructor.
data GetParameterHistoryResponse = GetParameterHistoryResponse'
  { _gphrsNextToken      :: !(Maybe Text)
  , _gphrsParameters     :: !(Maybe [ParameterHistory])
  , _gphrsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetParameterHistoryResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gphrsNextToken' - The token to use when requesting the next set of items. If there are no additional items to return, the string is empty.
--
-- * 'gphrsParameters' - A list of parameters returned by the request.
--
-- * 'gphrsResponseStatus' - -- | The response status code.
getParameterHistoryResponse
    :: Int -- ^ 'gphrsResponseStatus'
    -> GetParameterHistoryResponse
getParameterHistoryResponse pResponseStatus_ =
  GetParameterHistoryResponse'
    { _gphrsNextToken = Nothing
    , _gphrsParameters = Nothing
    , _gphrsResponseStatus = pResponseStatus_
    }


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

-- | A list of parameters returned by the request.
gphrsParameters :: Lens' GetParameterHistoryResponse [ParameterHistory]
gphrsParameters = lens _gphrsParameters (\ s a -> s{_gphrsParameters = a}) . _Default . _Coerce

-- | -- | The response status code.
gphrsResponseStatus :: Lens' GetParameterHistoryResponse Int
gphrsResponseStatus = lens _gphrsResponseStatus (\ s a -> s{_gphrsResponseStatus = a})

instance NFData GetParameterHistoryResponse where