{-# 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.LexModels.GetSlotTypeVersions
-- Copyright   : (c) 2013-2017 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)
--
-- Gets information about all versions of a slot type.
--
--
-- The @GetSlotTypeVersions@ operation returns a @SlotTypeMetadata@ object for each version of a slot type. For example, if a slot type has three numbered versions, the @GetSlotTypeVersions@ operation returns four @SlotTypeMetadata@ objects in the response, one for each numbered version and one for the @> LATEST@ version.
--
-- The @GetSlotTypeVersions@ operation always returns at least one version, the @> LATEST@ version.
--
-- This operation requires permissions for the @lex:GetSlotTypeVersions@ action.
--
module Network.AWS.LexModels.GetSlotTypeVersions
    (
    -- * Creating a Request
      getSlotTypeVersions
    , GetSlotTypeVersions
    -- * Request Lenses
    , gstvNextToken
    , gstvMaxResults
    , gstvName

    -- * Destructuring the Response
    , getSlotTypeVersionsResponse
    , GetSlotTypeVersionsResponse
    -- * Response Lenses
    , gstvrsNextToken
    , gstvrsSlotTypes
    , gstvrsResponseStatus
    ) where

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

-- | /See:/ 'getSlotTypeVersions' smart constructor.
data GetSlotTypeVersions = GetSlotTypeVersions'
  { _gstvNextToken  :: !(Maybe Text)
  , _gstvMaxResults :: !(Maybe Nat)
  , _gstvName       :: !Text
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetSlotTypeVersions' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gstvNextToken' - A pagination token for fetching the next page of slot type versions. If the response to this call is truncated, Amazon Lex returns a pagination token in the response. To fetch the next page of versions, specify the pagination token in the next request.
--
-- * 'gstvMaxResults' - The maximum number of slot type versions to return in the response. The default is 10.
--
-- * 'gstvName' - The name of the slot type for which versions should be returned.
getSlotTypeVersions
    :: Text -- ^ 'gstvName'
    -> GetSlotTypeVersions
getSlotTypeVersions pName_ =
  GetSlotTypeVersions'
  {_gstvNextToken = Nothing, _gstvMaxResults = Nothing, _gstvName = pName_}


-- | A pagination token for fetching the next page of slot type versions. If the response to this call is truncated, Amazon Lex returns a pagination token in the response. To fetch the next page of versions, specify the pagination token in the next request.
gstvNextToken :: Lens' GetSlotTypeVersions (Maybe Text)
gstvNextToken = lens _gstvNextToken (\ s a -> s{_gstvNextToken = a});

-- | The maximum number of slot type versions to return in the response. The default is 10.
gstvMaxResults :: Lens' GetSlotTypeVersions (Maybe Natural)
gstvMaxResults = lens _gstvMaxResults (\ s a -> s{_gstvMaxResults = a}) . mapping _Nat;

-- | The name of the slot type for which versions should be returned.
gstvName :: Lens' GetSlotTypeVersions Text
gstvName = lens _gstvName (\ s a -> s{_gstvName = a});

instance AWSRequest GetSlotTypeVersions where
        type Rs GetSlotTypeVersions =
             GetSlotTypeVersionsResponse
        request = get lexModels
        response
          = receiveJSON
              (\ s h x ->
                 GetSlotTypeVersionsResponse' <$>
                   (x .?> "nextToken") <*>
                     (x .?> "slotTypes" .!@ mempty)
                     <*> (pure (fromEnum s)))

instance Hashable GetSlotTypeVersions where

instance NFData GetSlotTypeVersions where

instance ToHeaders GetSlotTypeVersions where
        toHeaders
          = const
              (mconcat
                 ["Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToPath GetSlotTypeVersions where
        toPath GetSlotTypeVersions'{..}
          = mconcat
              ["/slottypes/", toBS _gstvName, "/versions/"]

instance ToQuery GetSlotTypeVersions where
        toQuery GetSlotTypeVersions'{..}
          = mconcat
              ["nextToken" =: _gstvNextToken,
               "maxResults" =: _gstvMaxResults]

-- | /See:/ 'getSlotTypeVersionsResponse' smart constructor.
data GetSlotTypeVersionsResponse = GetSlotTypeVersionsResponse'
  { _gstvrsNextToken      :: !(Maybe Text)
  , _gstvrsSlotTypes      :: !(Maybe [SlotTypeMetadata])
  , _gstvrsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetSlotTypeVersionsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gstvrsNextToken' - A pagination token for fetching the next page of slot type versions. If the response to this call is truncated, Amazon Lex returns a pagination token in the response. To fetch the next page of versions, specify the pagination token in the next request.
--
-- * 'gstvrsSlotTypes' - An array of @SlotTypeMetadata@ objects, one for each numbered version of the slot type plus one for the @> LATEST@ version.
--
-- * 'gstvrsResponseStatus' - -- | The response status code.
getSlotTypeVersionsResponse
    :: Int -- ^ 'gstvrsResponseStatus'
    -> GetSlotTypeVersionsResponse
getSlotTypeVersionsResponse pResponseStatus_ =
  GetSlotTypeVersionsResponse'
  { _gstvrsNextToken = Nothing
  , _gstvrsSlotTypes = Nothing
  , _gstvrsResponseStatus = pResponseStatus_
  }


-- | A pagination token for fetching the next page of slot type versions. If the response to this call is truncated, Amazon Lex returns a pagination token in the response. To fetch the next page of versions, specify the pagination token in the next request.
gstvrsNextToken :: Lens' GetSlotTypeVersionsResponse (Maybe Text)
gstvrsNextToken = lens _gstvrsNextToken (\ s a -> s{_gstvrsNextToken = a});

-- | An array of @SlotTypeMetadata@ objects, one for each numbered version of the slot type plus one for the @> LATEST@ version.
gstvrsSlotTypes :: Lens' GetSlotTypeVersionsResponse [SlotTypeMetadata]
gstvrsSlotTypes = lens _gstvrsSlotTypes (\ s a -> s{_gstvrsSlotTypes = a}) . _Default . _Coerce;

-- | -- | The response status code.
gstvrsResponseStatus :: Lens' GetSlotTypeVersionsResponse Int
gstvrsResponseStatus = lens _gstvrsResponseStatus (\ s a -> s{_gstvrsResponseStatus = a});

instance NFData GetSlotTypeVersionsResponse where