{-# LANGUAGE DataKinds                   #-}
{-# LANGUAGE DeriveGeneric               #-}
{-# LANGUAGE FlexibleInstances           #-}
{-# LANGUAGE GeneralizedNewtypeDeriving  #-}
{-# LANGUAGE LambdaCase                  #-}
{-# LANGUAGE NoImplicitPrelude           #-}
{-# LANGUAGE OverloadedStrings           #-}
{-# LANGUAGE RecordWildCards             #-}
{-# LANGUAGE TypeFamilies                #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}

-- Module      : Network.AWS.SNS.CreateTopic
-- Copyright   : (c) 2013-2014 Brendan Hay <brendan.g.hay@gmail.com>
-- License     : This Source Code Form is subject to the terms of
--               the Mozilla Public License, v. 2.0.
--               A copy of the MPL can be found in the LICENSE file or
--               you can obtain it at http://mozilla.org/MPL/2.0/.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : experimental
-- Portability : non-portable (GHC extensions)
--
-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- | Creates a topic to which notifications can be published. Users can create at
-- most 3000 topics. For more information, see <http://aws.amazon.com/sns/ http://aws.amazon.com/sns>. This
-- action is idempotent, so if the requester already owns a topic with the
-- specified name, that topic's ARN is returned without creating a new topic.
--
-- <http://docs.aws.amazon.com/sns/latest/api/API_CreateTopic.html>
module Network.AWS.SNS.CreateTopic
    (
    -- * Request
      CreateTopic
    -- ** Request constructor
    , createTopic
    -- ** Request lenses
    , ctName

    -- * Response
    , CreateTopicResponse
    -- ** Response constructor
    , createTopicResponse
    -- ** Response lenses
    , ctrTopicArn
    ) where

import Network.AWS.Prelude
import Network.AWS.Request.Query
import Network.AWS.SNS.Types
import qualified GHC.Exts

newtype CreateTopic = CreateTopic
    { _ctName :: Text
    } deriving (Eq, Ord, Show, Monoid, IsString)

-- | 'CreateTopic' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'ctName' @::@ 'Text'
--
createTopic :: Text -- ^ 'ctName'
            -> CreateTopic
createTopic p1 = CreateTopic
    { _ctName = p1
    }

-- | The name of the topic you want to create.
--
-- Constraints: Topic names must be made up of only uppercase and lowercase
-- ASCII letters, numbers, underscores, and hyphens, and must be between 1 and
-- 256 characters long.
ctName :: Lens' CreateTopic Text
ctName = lens _ctName (\s a -> s { _ctName = a })

newtype CreateTopicResponse = CreateTopicResponse
    { _ctrTopicArn :: Maybe Text
    } deriving (Eq, Ord, Show, Monoid)

-- | 'CreateTopicResponse' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'ctrTopicArn' @::@ 'Maybe' 'Text'
--
createTopicResponse :: CreateTopicResponse
createTopicResponse = CreateTopicResponse
    { _ctrTopicArn = Nothing
    }

-- | The Amazon Resource Name (ARN) assigned to the created topic.
ctrTopicArn :: Lens' CreateTopicResponse (Maybe Text)
ctrTopicArn = lens _ctrTopicArn (\s a -> s { _ctrTopicArn = a })

instance ToPath CreateTopic where
    toPath = const "/"

instance ToQuery CreateTopic where
    toQuery CreateTopic{..} = mconcat
        [ "Name" =? _ctName
        ]

instance ToHeaders CreateTopic

instance AWSRequest CreateTopic where
    type Sv CreateTopic = SNS
    type Rs CreateTopic = CreateTopicResponse

    request  = post "CreateTopic"
    response = xmlResponse

instance FromXML CreateTopicResponse where
    parseXML = withElement "CreateTopicResult" $ \x -> CreateTopicResponse
        <$> x .@? "TopicArn"