{-# 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.Redshift.DescribeTags
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns a list of tags. You can return tags from a specific resource by specifying an ARN, or you can return all tags for a given type of resource, such as clusters, snapshots, and so on.
--
--
-- The following are limitations for @DescribeTags@ :
--
--     * You cannot specify an ARN and a resource-type value together in the same request.
--
--     * You cannot use the @MaxRecords@ and @Marker@ parameters together with the ARN parameter.
--
--     * The @MaxRecords@ parameter can be a range from 10 to 50 results to return in a request.
--
--
--
-- If you specify both tag keys and tag values in the same request, Amazon Redshift returns all resources that match any combination of the specified keys and values. For example, if you have @owner@ and @environment@ for tag keys, and @admin@ and @test@ for tag values, all resources that have any combination of those values are returned.
--
-- If both tag keys and values are omitted from the request, resources are returned regardless of whether they have tag keys or values associated with them.
--
module Network.AWS.Redshift.DescribeTags
    (
    -- * Creating a Request
      describeTags
    , DescribeTags
    -- * Request Lenses
    , dtTagValues
    , dtResourceType
    , dtResourceName
    , dtTagKeys
    , dtMarker
    , dtMaxRecords

    -- * Destructuring the Response
    , describeTagsResponse
    , DescribeTagsResponse
    -- * Response Lenses
    , dtrsMarker
    , dtrsTaggedResources
    , dtrsResponseStatus
    ) where

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

-- |
--
--
--
-- /See:/ 'describeTags' smart constructor.
data DescribeTags = DescribeTags'
  { _dtTagValues    :: !(Maybe [Text])
  , _dtResourceType :: !(Maybe Text)
  , _dtResourceName :: !(Maybe Text)
  , _dtTagKeys      :: !(Maybe [Text])
  , _dtMarker       :: !(Maybe Text)
  , _dtMaxRecords   :: !(Maybe Int)
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeTags' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dtTagValues' - A tag value or values for which you want to return all matching resources that are associated with the specified value or values. For example, suppose that you have resources tagged with values called @admin@ and @test@ . If you specify both of these tag values in the request, Amazon Redshift returns a response with all resources that have either or both of these tag values associated with them.
--
-- * 'dtResourceType' - The type of resource with which you want to view tags. Valid resource types are:      * Cluster     * CIDR/IP     * EC2 security group     * Snapshot     * Cluster security group     * Subnet group     * HSM connection     * HSM certificate     * Parameter group     * Snapshot copy grant For more information about Amazon Redshift resource types and constructing ARNs, go to <http://docs.aws.amazon.com/redshift/latest/mgmt/redshift-iam-access-control-overview.html#redshift-iam-access-control-specify-actions Specifying Policy Elements: Actions, Effects, Resources, and Principals> in the Amazon Redshift Cluster Management Guide.
--
-- * 'dtResourceName' - The Amazon Resource Name (ARN) for which you want to describe the tag or tags. For example, @arn:aws:redshift:us-east-1:123456789:cluster:t1@ .
--
-- * 'dtTagKeys' - A tag key or keys for which you want to return all matching resources that are associated with the specified key or keys. For example, suppose that you have resources tagged with keys called @owner@ and @environment@ . If you specify both of these tag keys in the request, Amazon Redshift returns a response with all resources that have either or both of these tag keys associated with them.
--
-- * 'dtMarker' - A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @marker@ parameter and retrying the command. If the @marker@ field is empty, all response records have been retrieved for the request.
--
-- * 'dtMaxRecords' - The maximum number or response records to return in each call. If the number of remaining response records exceeds the specified @MaxRecords@ value, a value is returned in a @marker@ field of the response. You can retrieve the next set of records by retrying the command with the returned @marker@ value.
describeTags
    :: DescribeTags
describeTags =
  DescribeTags'
    { _dtTagValues = Nothing
    , _dtResourceType = Nothing
    , _dtResourceName = Nothing
    , _dtTagKeys = Nothing
    , _dtMarker = Nothing
    , _dtMaxRecords = Nothing
    }


-- | A tag value or values for which you want to return all matching resources that are associated with the specified value or values. For example, suppose that you have resources tagged with values called @admin@ and @test@ . If you specify both of these tag values in the request, Amazon Redshift returns a response with all resources that have either or both of these tag values associated with them.
dtTagValues :: Lens' DescribeTags [Text]
dtTagValues = lens _dtTagValues (\ s a -> s{_dtTagValues = a}) . _Default . _Coerce

-- | The type of resource with which you want to view tags. Valid resource types are:      * Cluster     * CIDR/IP     * EC2 security group     * Snapshot     * Cluster security group     * Subnet group     * HSM connection     * HSM certificate     * Parameter group     * Snapshot copy grant For more information about Amazon Redshift resource types and constructing ARNs, go to <http://docs.aws.amazon.com/redshift/latest/mgmt/redshift-iam-access-control-overview.html#redshift-iam-access-control-specify-actions Specifying Policy Elements: Actions, Effects, Resources, and Principals> in the Amazon Redshift Cluster Management Guide.
dtResourceType :: Lens' DescribeTags (Maybe Text)
dtResourceType = lens _dtResourceType (\ s a -> s{_dtResourceType = a})

-- | The Amazon Resource Name (ARN) for which you want to describe the tag or tags. For example, @arn:aws:redshift:us-east-1:123456789:cluster:t1@ .
dtResourceName :: Lens' DescribeTags (Maybe Text)
dtResourceName = lens _dtResourceName (\ s a -> s{_dtResourceName = a})

-- | A tag key or keys for which you want to return all matching resources that are associated with the specified key or keys. For example, suppose that you have resources tagged with keys called @owner@ and @environment@ . If you specify both of these tag keys in the request, Amazon Redshift returns a response with all resources that have either or both of these tag keys associated with them.
dtTagKeys :: Lens' DescribeTags [Text]
dtTagKeys = lens _dtTagKeys (\ s a -> s{_dtTagKeys = a}) . _Default . _Coerce

-- | A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @marker@ parameter and retrying the command. If the @marker@ field is empty, all response records have been retrieved for the request.
dtMarker :: Lens' DescribeTags (Maybe Text)
dtMarker = lens _dtMarker (\ s a -> s{_dtMarker = a})

-- | The maximum number or response records to return in each call. If the number of remaining response records exceeds the specified @MaxRecords@ value, a value is returned in a @marker@ field of the response. You can retrieve the next set of records by retrying the command with the returned @marker@ value.
dtMaxRecords :: Lens' DescribeTags (Maybe Int)
dtMaxRecords = lens _dtMaxRecords (\ s a -> s{_dtMaxRecords = a})

instance AWSRequest DescribeTags where
        type Rs DescribeTags = DescribeTagsResponse
        request = postQuery redshift
        response
          = receiveXMLWrapper "DescribeTagsResult"
              (\ s h x ->
                 DescribeTagsResponse' <$>
                   (x .@? "Marker") <*>
                     (x .@? "TaggedResources" .!@ mempty >>=
                        may (parseXMLList "TaggedResource"))
                     <*> (pure (fromEnum s)))

instance Hashable DescribeTags where

instance NFData DescribeTags where

instance ToHeaders DescribeTags where
        toHeaders = const mempty

instance ToPath DescribeTags where
        toPath = const "/"

instance ToQuery DescribeTags where
        toQuery DescribeTags'{..}
          = mconcat
              ["Action" =: ("DescribeTags" :: ByteString),
               "Version" =: ("2012-12-01" :: ByteString),
               "TagValues" =:
                 toQuery (toQueryList "TagValue" <$> _dtTagValues),
               "ResourceType" =: _dtResourceType,
               "ResourceName" =: _dtResourceName,
               "TagKeys" =:
                 toQuery (toQueryList "TagKey" <$> _dtTagKeys),
               "Marker" =: _dtMarker, "MaxRecords" =: _dtMaxRecords]

-- |
--
--
--
-- /See:/ 'describeTagsResponse' smart constructor.
data DescribeTagsResponse = DescribeTagsResponse'
  { _dtrsMarker          :: !(Maybe Text)
  , _dtrsTaggedResources :: !(Maybe [TaggedResource])
  , _dtrsResponseStatus  :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeTagsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dtrsMarker' - A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @Marker@ parameter and retrying the command. If the @Marker@ field is empty, all response records have been retrieved for the request.
--
-- * 'dtrsTaggedResources' - A list of tags with their associated resources.
--
-- * 'dtrsResponseStatus' - -- | The response status code.
describeTagsResponse
    :: Int -- ^ 'dtrsResponseStatus'
    -> DescribeTagsResponse
describeTagsResponse pResponseStatus_ =
  DescribeTagsResponse'
    { _dtrsMarker = Nothing
    , _dtrsTaggedResources = Nothing
    , _dtrsResponseStatus = pResponseStatus_
    }


-- | A value that indicates the starting point for the next set of response records in a subsequent request. If a value is returned in a response, you can retrieve the next set of records by providing this returned marker value in the @Marker@ parameter and retrying the command. If the @Marker@ field is empty, all response records have been retrieved for the request.
dtrsMarker :: Lens' DescribeTagsResponse (Maybe Text)
dtrsMarker = lens _dtrsMarker (\ s a -> s{_dtrsMarker = a})

-- | A list of tags with their associated resources.
dtrsTaggedResources :: Lens' DescribeTagsResponse [TaggedResource]
dtrsTaggedResources = lens _dtrsTaggedResources (\ s a -> s{_dtrsTaggedResources = a}) . _Default . _Coerce

-- | -- | The response status code.
dtrsResponseStatus :: Lens' DescribeTagsResponse Int
dtrsResponseStatus = lens _dtrsResponseStatus (\ s a -> s{_dtrsResponseStatus = a})

instance NFData DescribeTagsResponse where