{-# 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.SWF.DescribeActivityType
-- Copyright   : (c) 2013-2015 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 information about the specified activity type. This includes
-- configuration settings provided when the type was registered and other
-- general information about the type.
--
-- __Access Control__
--
-- You can use IAM policies to control this action\'s access to Amazon SWF
-- resources as follows:
--
-- -   Use a 'Resource' element with the domain name to limit the action to
--     only specified domains.
-- -   Use an 'Action' element to allow or deny permission to call this
--     action.
-- -   Constrain the following parameters by using a 'Condition' element
--     with the appropriate keys.
--     -   'activityType.name': String constraint. The key is
--         'swf:activityType.name'.
--     -   'activityType.version': String constraint. The key is
--         'swf:activityType.version'.
--
-- If the caller does not have sufficient permissions to invoke the action,
-- or the parameter values fall outside the specified constraints, the
-- action fails. The associated event attribute\'s __cause__ parameter will
-- be set to OPERATION_NOT_PERMITTED. For details and example IAM policies,
-- see
-- <http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html Using IAM to Manage Access to Amazon SWF Workflows>.
--
-- /See:/ <http://docs.aws.amazon.com/amazonswf/latest/apireference/API_DescribeActivityType.html AWS API Reference> for DescribeActivityType.
module Network.AWS.SWF.DescribeActivityType
    (
    -- * Creating a Request
      describeActivityType
    , DescribeActivityType
    -- * Request Lenses
    , datDomain
    , datActivityType

    -- * Destructuring the Response
    , describeActivityTypeResponse
    , DescribeActivityTypeResponse
    -- * Response Lenses
    , datrsStatus
    , datrsTypeInfo
    , datrsConfiguration
    ) where

import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response
import           Network.AWS.SWF.Types
import           Network.AWS.SWF.Types.Product

-- | /See:/ 'describeActivityType' smart constructor.
data DescribeActivityType = DescribeActivityType'
    { _datDomain       :: !Text
    , _datActivityType :: !ActivityType
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeActivityType' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'datDomain'
--
-- * 'datActivityType'
describeActivityType
    :: Text -- ^ 'datDomain'
    -> ActivityType -- ^ 'datActivityType'
    -> DescribeActivityType
describeActivityType pDomain_ pActivityType_ =
    DescribeActivityType'
    { _datDomain = pDomain_
    , _datActivityType = pActivityType_
    }

-- | The name of the domain in which the activity type is registered.
datDomain :: Lens' DescribeActivityType Text
datDomain = lens _datDomain (\ s a -> s{_datDomain = a});

-- | The activity type to get information about. Activity types are
-- identified by the 'name' and 'version' that were supplied when the
-- activity was registered.
datActivityType :: Lens' DescribeActivityType ActivityType
datActivityType = lens _datActivityType (\ s a -> s{_datActivityType = a});

instance AWSRequest DescribeActivityType where
        type Sv DescribeActivityType = SWF
        type Rs DescribeActivityType =
             DescribeActivityTypeResponse
        request = postJSON
        response
          = receiveJSON
              (\ s h x ->
                 DescribeActivityTypeResponse' <$>
                   (pure (fromEnum s)) <*> (x .:> "typeInfo") <*>
                     (x .:> "configuration"))

instance ToHeaders DescribeActivityType where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("SimpleWorkflowService.DescribeActivityType" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.0" :: ByteString)])

instance ToJSON DescribeActivityType where
        toJSON DescribeActivityType'{..}
          = object
              ["domain" .= _datDomain,
               "activityType" .= _datActivityType]

instance ToPath DescribeActivityType where
        toPath = const "/"

instance ToQuery DescribeActivityType where
        toQuery = const mempty

-- | Detailed information about an activity type.
--
-- /See:/ 'describeActivityTypeResponse' smart constructor.
data DescribeActivityTypeResponse = DescribeActivityTypeResponse'
    { _datrsStatus        :: !Int
    , _datrsTypeInfo      :: !ActivityTypeInfo
    , _datrsConfiguration :: !ActivityTypeConfiguration
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeActivityTypeResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'datrsStatus'
--
-- * 'datrsTypeInfo'
--
-- * 'datrsConfiguration'
describeActivityTypeResponse
    :: Int -- ^ 'datrsStatus'
    -> ActivityTypeInfo -- ^ 'datrsTypeInfo'
    -> ActivityTypeConfiguration -- ^ 'datrsConfiguration'
    -> DescribeActivityTypeResponse
describeActivityTypeResponse pStatus_ pTypeInfo_ pConfiguration_ =
    DescribeActivityTypeResponse'
    { _datrsStatus = pStatus_
    , _datrsTypeInfo = pTypeInfo_
    , _datrsConfiguration = pConfiguration_
    }

-- | The response status code.
datrsStatus :: Lens' DescribeActivityTypeResponse Int
datrsStatus = lens _datrsStatus (\ s a -> s{_datrsStatus = a});

-- | General information about the activity type.
--
-- The status of activity type (returned in the ActivityTypeInfo structure)
-- can be one of the following.
--
-- -   __REGISTERED__: The type is registered and available. Workers
--     supporting this type should be running.
-- -   __DEPRECATED__: The type was deprecated using DeprecateActivityType,
--     but is still in use. You should keep workers supporting this type
--     running. You cannot create new tasks of this type.
datrsTypeInfo :: Lens' DescribeActivityTypeResponse ActivityTypeInfo
datrsTypeInfo = lens _datrsTypeInfo (\ s a -> s{_datrsTypeInfo = a});

-- | The configuration settings registered with the activity type.
datrsConfiguration :: Lens' DescribeActivityTypeResponse ActivityTypeConfiguration
datrsConfiguration = lens _datrsConfiguration (\ s a -> s{_datrsConfiguration = a});