{-# 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.Lambda.GetFunctionConfiguration
-- Copyright   : (c) 2013-2016 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)
--
-- Returns the configuration information of the Lambda function. This the
-- same information you provided as parameters when uploading the function
-- by using < CreateFunction>.
--
-- If you are using the versioning feature, you can retrieve this
-- information for a specific function version by using the optional
-- 'Qualifier' parameter and specifying the function version or alias that
-- points to it. If you don\'t provide it, the API returns information
-- about the $LATEST version of the function. For more information about
-- versioning, see
-- <http://docs.aws.amazon.com/lambda/latest/dg/versioning-aliases.html AWS Lambda Function Versioning and Aliases>.
--
-- This operation requires permission for the
-- 'lambda:GetFunctionConfiguration' operation.
module Network.AWS.Lambda.GetFunctionConfiguration
    (
    -- * Creating a Request
      getFunctionConfiguration
    , GetFunctionConfiguration
    -- * Request Lenses
    , gfcQualifier
    , gfcFunctionName

    -- * Destructuring the Response
    , functionConfiguration
    , FunctionConfiguration
    -- * Response Lenses
    , fcMemorySize
    , fcRuntime
    , fcFunctionARN
    , fcRole
    , fcVPCConfig
    , fcVersion
    , fcFunctionName
    , fcCodeSize
    , fcHandler
    , fcTimeout
    , fcLastModified
    , fcCodeSha256
    , fcDescription
    ) where

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

-- | /See:/ 'getFunctionConfiguration' smart constructor.
data GetFunctionConfiguration = GetFunctionConfiguration'
    { _gfcQualifier    :: !(Maybe Text)
    , _gfcFunctionName :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'GetFunctionConfiguration' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gfcQualifier'
--
-- * 'gfcFunctionName'
getFunctionConfiguration
    :: Text -- ^ 'gfcFunctionName'
    -> GetFunctionConfiguration
getFunctionConfiguration pFunctionName_ =
    GetFunctionConfiguration'
    { _gfcQualifier = Nothing
    , _gfcFunctionName = pFunctionName_
    }

-- | Using this optional parameter you can specify a function version or an
-- alias name. If you specify function version, the API uses qualified
-- function ARN and returns information about the specific function
-- version. If you specify an alias name, the API uses the alias ARN and
-- returns information about the function version to which the alias
-- points.
--
-- If you don\'t specify this parameter, the API uses unqualified function
-- ARN, and returns information about the '$LATEST' function version.
gfcQualifier :: Lens' GetFunctionConfiguration (Maybe Text)
gfcQualifier = lens _gfcQualifier (\ s a -> s{_gfcQualifier = a});

-- | The name of the Lambda function for which you want to retrieve the
-- configuration information.
--
-- You can specify a function name (for example, 'Thumbnail') or you can
-- specify Amazon Resource Name (ARN) of the function (for example,
-- 'arn:aws:lambda:us-west-2:account-id:function:ThumbNail'). AWS Lambda
-- also allows you to specify a partial ARN (for example,
-- 'account-id:Thumbnail'). Note that the length constraint applies only to
-- the ARN. If you specify only the function name, it is limited to 64
-- character in length.
gfcFunctionName :: Lens' GetFunctionConfiguration Text
gfcFunctionName = lens _gfcFunctionName (\ s a -> s{_gfcFunctionName = a});

instance AWSRequest GetFunctionConfiguration where
        type Rs GetFunctionConfiguration =
             FunctionConfiguration
        request = get lambda
        response = receiveJSON (\ s h x -> eitherParseJSON x)

instance Hashable GetFunctionConfiguration

instance NFData GetFunctionConfiguration

instance ToHeaders GetFunctionConfiguration where
        toHeaders = const mempty

instance ToPath GetFunctionConfiguration where
        toPath GetFunctionConfiguration'{..}
          = mconcat
              ["/2015-03-31/functions/", toBS _gfcFunctionName,
               "/configuration"]

instance ToQuery GetFunctionConfiguration where
        toQuery GetFunctionConfiguration'{..}
          = mconcat ["Qualifier" =: _gfcQualifier]