{-# 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.ECS.ListTaskDefinitionFamilies
-- 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.

-- | Returns a list of task definition families that are registered to your
-- account. You can filter the results with the 'familyPrefix' parameter.
--
-- <http://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ListTaskDefinitionFamilies.html>
module Network.AWS.ECS.ListTaskDefinitionFamilies
    (
    -- * Request
      ListTaskDefinitionFamilies
    -- ** Request constructor
    , listTaskDefinitionFamilies
    -- ** Request lenses
    , ltdfFamilyPrefix
    , ltdfMaxResults
    , ltdfNextToken

    -- * Response
    , ListTaskDefinitionFamiliesResponse
    -- ** Response constructor
    , listTaskDefinitionFamiliesResponse
    -- ** Response lenses
    , ltdfrFamilies
    , ltdfrNextToken
    ) where

import Network.AWS.Data (Object)
import Network.AWS.Prelude
import Network.AWS.Request.JSON
import Network.AWS.ECS.Types
import qualified GHC.Exts

data ListTaskDefinitionFamilies = ListTaskDefinitionFamilies
    { _ltdfFamilyPrefix :: Maybe Text
    , _ltdfMaxResults   :: Maybe Int
    , _ltdfNextToken    :: Maybe Text
    } deriving (Eq, Ord, Read, Show)

-- | 'ListTaskDefinitionFamilies' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'ltdfFamilyPrefix' @::@ 'Maybe' 'Text'
--
-- * 'ltdfMaxResults' @::@ 'Maybe' 'Int'
--
-- * 'ltdfNextToken' @::@ 'Maybe' 'Text'
--
listTaskDefinitionFamilies :: ListTaskDefinitionFamilies
listTaskDefinitionFamilies = ListTaskDefinitionFamilies
    { _ltdfFamilyPrefix = Nothing
    , _ltdfNextToken    = Nothing
    , _ltdfMaxResults   = Nothing
    }

-- | The 'familyPrefix' is a string that is used to filter the results of 'ListTaskDefinitionFamilies'. If you specify a 'familyPrefix', only task definition family names that begin
-- with the 'familyPrefix' string are returned.
ltdfFamilyPrefix :: Lens' ListTaskDefinitionFamilies (Maybe Text)
ltdfFamilyPrefix = lens _ltdfFamilyPrefix (\s a -> s { _ltdfFamilyPrefix = a })

-- | The maximum number of task definition family results returned by 'ListTaskDefinitionFamilies' in paginated output. When this parameter is used, 'ListTaskDefinitions' only
-- returns 'maxResults' results in a single page along with a 'nextToken' response
-- element. The remaining results of the initial request can be seen by sending
-- another 'ListTaskDefinitionFamilies' request with the returned 'nextToken' value.
-- This value can be between 1 and 100. If this parameter is not used, then 'ListTaskDefinitionFamilies' returns up to 100 results and a 'nextToken' value if applicable.
ltdfMaxResults :: Lens' ListTaskDefinitionFamilies (Maybe Int)
ltdfMaxResults = lens _ltdfMaxResults (\s a -> s { _ltdfMaxResults = a })

-- | The 'nextToken' value returned from a previous paginated 'ListTaskDefinitionFamilies' request where 'maxResults' was used and the results exceeded the value of that
-- parameter. Pagination continues from the end of the previous results that
-- returned the 'nextToken' value. This value is 'null' when there are no more
-- results to return.
ltdfNextToken :: Lens' ListTaskDefinitionFamilies (Maybe Text)
ltdfNextToken = lens _ltdfNextToken (\s a -> s { _ltdfNextToken = a })

data ListTaskDefinitionFamiliesResponse = ListTaskDefinitionFamiliesResponse
    { _ltdfrFamilies  :: List "families" Text
    , _ltdfrNextToken :: Maybe Text
    } deriving (Eq, Ord, Read, Show)

-- | 'ListTaskDefinitionFamiliesResponse' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'ltdfrFamilies' @::@ ['Text']
--
-- * 'ltdfrNextToken' @::@ 'Maybe' 'Text'
--
listTaskDefinitionFamiliesResponse :: ListTaskDefinitionFamiliesResponse
listTaskDefinitionFamiliesResponse = ListTaskDefinitionFamiliesResponse
    { _ltdfrFamilies  = mempty
    , _ltdfrNextToken = Nothing
    }

-- | The list of task definition family names that match the 'ListTaskDefinitionFamilies' request.
ltdfrFamilies :: Lens' ListTaskDefinitionFamiliesResponse [Text]
ltdfrFamilies = lens _ltdfrFamilies (\s a -> s { _ltdfrFamilies = a }) . _List

-- | The 'nextToken' value to include in a future 'ListTaskDefinitionFamilies'
-- request. When the results of a 'ListTaskDefinitionFamilies' request exceed 'maxResults', this value can be used to retrieve the next page of results. This value is 'null' when there are no more results to return.
ltdfrNextToken :: Lens' ListTaskDefinitionFamiliesResponse (Maybe Text)
ltdfrNextToken = lens _ltdfrNextToken (\s a -> s { _ltdfrNextToken = a })

instance ToPath ListTaskDefinitionFamilies where
    toPath = const "/"

instance ToQuery ListTaskDefinitionFamilies where
    toQuery = const mempty

instance ToHeaders ListTaskDefinitionFamilies

instance ToJSON ListTaskDefinitionFamilies where
    toJSON ListTaskDefinitionFamilies{..} = object
        [ "familyPrefix" .= _ltdfFamilyPrefix
        , "nextToken"    .= _ltdfNextToken
        , "maxResults"   .= _ltdfMaxResults
        ]

instance AWSRequest ListTaskDefinitionFamilies where
    type Sv ListTaskDefinitionFamilies = ECS
    type Rs ListTaskDefinitionFamilies = ListTaskDefinitionFamiliesResponse

    request  = post "ListTaskDefinitionFamilies"
    response = jsonResponse

instance FromJSON ListTaskDefinitionFamiliesResponse where
    parseJSON = withObject "ListTaskDefinitionFamiliesResponse" $ \o -> ListTaskDefinitionFamiliesResponse
        <$> o .:? "families" .!= mempty
        <*> o .:? "nextToken"