{-# 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.DescribeWorkflowType
-- 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 /workflow type/. This includes
-- configuration settings specified when the type was registered and other
-- information such as creation date, current status, and so on.
--
-- __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.
--     -   'workflowType.name': String constraint. The key is
--         'swf:workflowType.name'.
--     -   'workflowType.version': String constraint. The key is
--         'swf:workflowType.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_DescribeWorkflowType.html AWS API Reference> for DescribeWorkflowType.
module Network.AWS.SWF.DescribeWorkflowType
    (
    -- * Creating a Request
      describeWorkflowType
    , DescribeWorkflowType
    -- * Request Lenses
    , dwtDomain
    , dwtWorkflowType

    -- * Destructuring the Response
    , describeWorkflowTypeResponse
    , DescribeWorkflowTypeResponse
    -- * Response Lenses
    , dwtrsResponseStatus
    , dwtrsTypeInfo
    , dwtrsConfiguration
    ) 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:/ 'describeWorkflowType' smart constructor.
data DescribeWorkflowType = DescribeWorkflowType'
    { _dwtDomain       :: !Text
    , _dwtWorkflowType :: !WorkflowType
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeWorkflowType' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dwtDomain'
--
-- * 'dwtWorkflowType'
describeWorkflowType
    :: Text -- ^ 'dwtDomain'
    -> WorkflowType -- ^ 'dwtWorkflowType'
    -> DescribeWorkflowType
describeWorkflowType pDomain_ pWorkflowType_ =
    DescribeWorkflowType'
    { _dwtDomain = pDomain_
    , _dwtWorkflowType = pWorkflowType_
    }

-- | The name of the domain in which this workflow type is registered.
dwtDomain :: Lens' DescribeWorkflowType Text
dwtDomain = lens _dwtDomain (\ s a -> s{_dwtDomain = a});

-- | The workflow type to describe.
dwtWorkflowType :: Lens' DescribeWorkflowType WorkflowType
dwtWorkflowType = lens _dwtWorkflowType (\ s a -> s{_dwtWorkflowType = a});

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

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

instance ToJSON DescribeWorkflowType where
        toJSON DescribeWorkflowType'{..}
          = object
              (catMaybes
                 [Just ("domain" .= _dwtDomain),
                  Just ("workflowType" .= _dwtWorkflowType)])

instance ToPath DescribeWorkflowType where
        toPath = const "/"

instance ToQuery DescribeWorkflowType where
        toQuery = const mempty

-- | Contains details about a workflow type.
--
-- /See:/ 'describeWorkflowTypeResponse' smart constructor.
data DescribeWorkflowTypeResponse = DescribeWorkflowTypeResponse'
    { _dwtrsResponseStatus :: !Int
    , _dwtrsTypeInfo       :: !WorkflowTypeInfo
    , _dwtrsConfiguration  :: !WorkflowTypeConfiguration
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeWorkflowTypeResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dwtrsResponseStatus'
--
-- * 'dwtrsTypeInfo'
--
-- * 'dwtrsConfiguration'
describeWorkflowTypeResponse
    :: Int -- ^ 'dwtrsResponseStatus'
    -> WorkflowTypeInfo -- ^ 'dwtrsTypeInfo'
    -> WorkflowTypeConfiguration -- ^ 'dwtrsConfiguration'
    -> DescribeWorkflowTypeResponse
describeWorkflowTypeResponse pResponseStatus_ pTypeInfo_ pConfiguration_ =
    DescribeWorkflowTypeResponse'
    { _dwtrsResponseStatus = pResponseStatus_
    , _dwtrsTypeInfo = pTypeInfo_
    , _dwtrsConfiguration = pConfiguration_
    }

-- | The response status code.
dwtrsResponseStatus :: Lens' DescribeWorkflowTypeResponse Int
dwtrsResponseStatus = lens _dwtrsResponseStatus (\ s a -> s{_dwtrsResponseStatus = a});

-- | General information about the workflow type.
--
-- The status of the workflow type (returned in the WorkflowTypeInfo
-- 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 DeprecateWorkflowType,
--     but is still in use. You should keep workers supporting this type
--     running. You cannot create new workflow executions of this type.
dwtrsTypeInfo :: Lens' DescribeWorkflowTypeResponse WorkflowTypeInfo
dwtrsTypeInfo = lens _dwtrsTypeInfo (\ s a -> s{_dwtrsTypeInfo = a});

-- | Configuration settings of the workflow type registered through
-- RegisterWorkflowType
dwtrsConfiguration :: Lens' DescribeWorkflowTypeResponse WorkflowTypeConfiguration
dwtrsConfiguration = lens _dwtrsConfiguration (\ s a -> s{_dwtrsConfiguration = a});