{-# 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.Route53.ListTrafficPolicyVersions
-- 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)
--
-- Gets information about all of the versions for a specified traffic
-- policy. 'ListTrafficPolicyVersions' lists only versions that have not
-- been deleted.
--
-- Amazon Route 53 returns a maximum of 100 items in each response. If you
-- have a lot of traffic policies, you can use the 'maxitems' parameter to
-- list them in groups of up to 100.
--
-- The response includes three values that help you navigate from one group
-- of 'maxitems'maxitems traffic policies to the next:
--
-- -   __IsTruncated__
-- -   __TrafficPolicyVersionMarker__
-- -   __MaxItems__
module Network.AWS.Route53.ListTrafficPolicyVersions
    (
    -- * Creating a Request
      listTrafficPolicyVersions
    , ListTrafficPolicyVersions
    -- * Request Lenses
    , ltpvMaxItems
    , ltpvTrafficPolicyVersionMarker
    , ltpvId

    -- * Destructuring the Response
    , listTrafficPolicyVersionsResponse
    , ListTrafficPolicyVersionsResponse
    -- * Response Lenses
    , ltpvrsResponseStatus
    , ltpvrsTrafficPolicies
    , ltpvrsIsTruncated
    , ltpvrsTrafficPolicyVersionMarker
    , ltpvrsMaxItems
    ) where

import           Network.AWS.Lens
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response
import           Network.AWS.Route53.Types
import           Network.AWS.Route53.Types.Product

-- | A complex type that contains the information about the request to list
-- your traffic policies.
--
-- /See:/ 'listTrafficPolicyVersions' smart constructor.
data ListTrafficPolicyVersions = ListTrafficPolicyVersions'
    { _ltpvMaxItems                   :: !(Maybe Text)
    , _ltpvTrafficPolicyVersionMarker :: !(Maybe Text)
    , _ltpvId                         :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListTrafficPolicyVersions' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ltpvMaxItems'
--
-- * 'ltpvTrafficPolicyVersionMarker'
--
-- * 'ltpvId'
listTrafficPolicyVersions
    :: Text -- ^ 'ltpvId'
    -> ListTrafficPolicyVersions
listTrafficPolicyVersions pId_ =
    ListTrafficPolicyVersions'
    { _ltpvMaxItems = Nothing
    , _ltpvTrafficPolicyVersionMarker = Nothing
    , _ltpvId = pId_
    }

-- | The maximum number of traffic policy versions that you want Amazon Route
-- 53 to include in the response body for this request. If the specified
-- traffic policy has more than 'MaxItems' versions, the value of the
-- 'IsTruncated' element in the response is 'true', and the value of the
-- 'TrafficPolicyVersionMarker' element is the ID of the first version in
-- the next group of 'MaxItems' traffic policy versions.
ltpvMaxItems :: Lens' ListTrafficPolicyVersions (Maybe Text)
ltpvMaxItems = lens _ltpvMaxItems (\ s a -> s{_ltpvMaxItems = a});

-- | For your first request to 'ListTrafficPolicyVersions', do not include
-- the 'TrafficPolicyVersionMarker' parameter.
--
-- If you have more traffic policy versions than the value of 'MaxItems',
-- 'ListTrafficPolicyVersions' returns only the first group of 'MaxItems'
-- versions. To get the next group of 'MaxItems' traffic policy versions,
-- submit another request to 'ListTrafficPolicyVersions'. For the value of
-- 'TrafficPolicyVersionMarker', specify the value of the
-- 'TrafficPolicyVersionMarker' element that was returned in the previous
-- response.
--
-- Traffic policy versions are listed in sequential order.
ltpvTrafficPolicyVersionMarker :: Lens' ListTrafficPolicyVersions (Maybe Text)
ltpvTrafficPolicyVersionMarker = lens _ltpvTrafficPolicyVersionMarker (\ s a -> s{_ltpvTrafficPolicyVersionMarker = a});

-- | Specify the value of 'Id' of the traffic policy for which you want to
-- list all versions.
ltpvId :: Lens' ListTrafficPolicyVersions Text
ltpvId = lens _ltpvId (\ s a -> s{_ltpvId = a});

instance AWSRequest ListTrafficPolicyVersions where
        type Rs ListTrafficPolicyVersions =
             ListTrafficPolicyVersionsResponse
        request = get route53
        response
          = receiveXML
              (\ s h x ->
                 ListTrafficPolicyVersionsResponse' <$>
                   (pure (fromEnum s)) <*>
                     (x .@? "TrafficPolicies" .!@ mempty >>=
                        parseXMLList "TrafficPolicy")
                     <*> (x .@ "IsTruncated")
                     <*> (x .@ "TrafficPolicyVersionMarker")
                     <*> (x .@ "MaxItems"))

instance Hashable ListTrafficPolicyVersions

instance ToHeaders ListTrafficPolicyVersions where
        toHeaders = const mempty

instance ToPath ListTrafficPolicyVersions where
        toPath ListTrafficPolicyVersions'{..}
          = mconcat
              ["/2013-04-01/trafficpolicies/", toBS _ltpvId,
               "/versions"]

instance ToQuery ListTrafficPolicyVersions where
        toQuery ListTrafficPolicyVersions'{..}
          = mconcat
              ["maxitems" =: _ltpvMaxItems,
               "trafficpolicyversion" =:
                 _ltpvTrafficPolicyVersionMarker]

-- | A complex type that contains the response information for the request.
--
-- /See:/ 'listTrafficPolicyVersionsResponse' smart constructor.
data ListTrafficPolicyVersionsResponse = ListTrafficPolicyVersionsResponse'
    { _ltpvrsResponseStatus             :: !Int
    , _ltpvrsTrafficPolicies            :: ![TrafficPolicy]
    , _ltpvrsIsTruncated                :: !Bool
    , _ltpvrsTrafficPolicyVersionMarker :: !Text
    , _ltpvrsMaxItems                   :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListTrafficPolicyVersionsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ltpvrsResponseStatus'
--
-- * 'ltpvrsTrafficPolicies'
--
-- * 'ltpvrsIsTruncated'
--
-- * 'ltpvrsTrafficPolicyVersionMarker'
--
-- * 'ltpvrsMaxItems'
listTrafficPolicyVersionsResponse
    :: Int -- ^ 'ltpvrsResponseStatus'
    -> Bool -- ^ 'ltpvrsIsTruncated'
    -> Text -- ^ 'ltpvrsTrafficPolicyVersionMarker'
    -> Text -- ^ 'ltpvrsMaxItems'
    -> ListTrafficPolicyVersionsResponse
listTrafficPolicyVersionsResponse pResponseStatus_ pIsTruncated_ pTrafficPolicyVersionMarker_ pMaxItems_ =
    ListTrafficPolicyVersionsResponse'
    { _ltpvrsResponseStatus = pResponseStatus_
    , _ltpvrsTrafficPolicies = mempty
    , _ltpvrsIsTruncated = pIsTruncated_
    , _ltpvrsTrafficPolicyVersionMarker = pTrafficPolicyVersionMarker_
    , _ltpvrsMaxItems = pMaxItems_
    }

-- | The response status code.
ltpvrsResponseStatus :: Lens' ListTrafficPolicyVersionsResponse Int
ltpvrsResponseStatus = lens _ltpvrsResponseStatus (\ s a -> s{_ltpvrsResponseStatus = a});

-- | A list that contains one 'TrafficPolicy' element for each traffic policy
-- version that is associated with the specified traffic policy.
ltpvrsTrafficPolicies :: Lens' ListTrafficPolicyVersionsResponse [TrafficPolicy]
ltpvrsTrafficPolicies = lens _ltpvrsTrafficPolicies (\ s a -> s{_ltpvrsTrafficPolicies = a}) . _Coerce;

-- | A flag that indicates whether there are more traffic policies to be
-- listed. If the response was truncated, you can get the next group of
-- 'maxitems' traffic policies by calling 'ListTrafficPolicyVersions' again
-- and specifying the value of the 'NextMarker' element in the marker
-- parameter.
--
-- Valid Values: 'true' | 'false'
ltpvrsIsTruncated :: Lens' ListTrafficPolicyVersionsResponse Bool
ltpvrsIsTruncated = lens _ltpvrsIsTruncated (\ s a -> s{_ltpvrsIsTruncated = a});

-- | If 'IsTruncated' is 'true', the value of 'TrafficPolicyVersionMarker'
-- identifies the first traffic policy in the next group of 'MaxItems'
-- traffic policies. Call 'ListTrafficPolicyVersions' again and specify the
-- value of 'TrafficPolicyVersionMarker' in the
-- 'TrafficPolicyVersionMarker' request parameter.
--
-- This element is present only if 'IsTruncated' is 'true'.
ltpvrsTrafficPolicyVersionMarker :: Lens' ListTrafficPolicyVersionsResponse Text
ltpvrsTrafficPolicyVersionMarker = lens _ltpvrsTrafficPolicyVersionMarker (\ s a -> s{_ltpvrsTrafficPolicyVersionMarker = a});

-- | The value that you specified for the 'maxitems' parameter in the call to
-- 'ListTrafficPolicyVersions' that produced the current response.
ltpvrsMaxItems :: Lens' ListTrafficPolicyVersionsResponse Text
ltpvrsMaxItems = lens _ltpvrsMaxItems (\ s a -> s{_ltpvrsMaxItems = a});