{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.ResourceGroupsTagging.GetTagValues
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns all tag values for the specified key that are used in the
-- specified Amazon Web Services Region for the calling account.
--
-- This operation supports pagination, where the response can be sent in
-- multiple pages. You should check the @PaginationToken@ response
-- parameter to determine if there are additional results available to
-- return. Repeat the query, passing the @PaginationToken@ response
-- parameter value as an input to the next request until you recieve a
-- @null@ value. A null value for @PaginationToken@ indicates that there
-- are no more results waiting to be returned.
--
-- This operation returns paginated results.
module Amazonka.ResourceGroupsTagging.GetTagValues
  ( -- * Creating a Request
    GetTagValues (..),
    newGetTagValues,

    -- * Request Lenses
    getTagValues_paginationToken,
    getTagValues_key,

    -- * Destructuring the Response
    GetTagValuesResponse (..),
    newGetTagValuesResponse,

    -- * Response Lenses
    getTagValuesResponse_paginationToken,
    getTagValuesResponse_tagValues,
    getTagValuesResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import Amazonka.ResourceGroupsTagging.Types
import qualified Amazonka.Response as Response

-- | /See:/ 'newGetTagValues' smart constructor.
data GetTagValues = GetTagValues'
  { -- | Specifies a @PaginationToken@ response value from a previous request to
    -- indicate that you want the next page of results. Leave this parameter
    -- empty in your initial request.
    paginationToken :: Prelude.Maybe Prelude.Text,
    -- | Specifies the tag key for which you want to list all existing values
    -- that are currently used in the specified Amazon Web Services Region for
    -- the calling account.
    key :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetTagValues' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'paginationToken', 'getTagValues_paginationToken' - Specifies a @PaginationToken@ response value from a previous request to
-- indicate that you want the next page of results. Leave this parameter
-- empty in your initial request.
--
-- 'key', 'getTagValues_key' - Specifies the tag key for which you want to list all existing values
-- that are currently used in the specified Amazon Web Services Region for
-- the calling account.
newGetTagValues ::
  -- | 'key'
  Prelude.Text ->
  GetTagValues
newGetTagValues pKey_ =
  GetTagValues'
    { paginationToken = Prelude.Nothing,
      key = pKey_
    }

-- | Specifies a @PaginationToken@ response value from a previous request to
-- indicate that you want the next page of results. Leave this parameter
-- empty in your initial request.
getTagValues_paginationToken :: Lens.Lens' GetTagValues (Prelude.Maybe Prelude.Text)
getTagValues_paginationToken = Lens.lens (\GetTagValues' {paginationToken} -> paginationToken) (\s@GetTagValues' {} a -> s {paginationToken = a} :: GetTagValues)

-- | Specifies the tag key for which you want to list all existing values
-- that are currently used in the specified Amazon Web Services Region for
-- the calling account.
getTagValues_key :: Lens.Lens' GetTagValues Prelude.Text
getTagValues_key = Lens.lens (\GetTagValues' {key} -> key) (\s@GetTagValues' {} a -> s {key = a} :: GetTagValues)

instance Core.AWSPager GetTagValues where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? getTagValuesResponse_paginationToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? getTagValuesResponse_tagValues
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& getTagValues_paginationToken
          Lens..~ rs
          Lens.^? getTagValuesResponse_paginationToken
          Prelude.. Lens._Just

instance Core.AWSRequest GetTagValues where
  type AWSResponse GetTagValues = GetTagValuesResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          GetTagValuesResponse'
            Prelude.<$> (x Data..?> "PaginationToken")
            Prelude.<*> (x Data..?> "TagValues" Core..!@ Prelude.mempty)
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable GetTagValues where
  hashWithSalt _salt GetTagValues' {..} =
    _salt
      `Prelude.hashWithSalt` paginationToken
      `Prelude.hashWithSalt` key

instance Prelude.NFData GetTagValues where
  rnf GetTagValues' {..} =
    Prelude.rnf paginationToken
      `Prelude.seq` Prelude.rnf key

instance Data.ToHeaders GetTagValues where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "ResourceGroupsTaggingAPI_20170126.GetTagValues" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON GetTagValues where
  toJSON GetTagValues' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("PaginationToken" Data..=)
              Prelude.<$> paginationToken,
            Prelude.Just ("Key" Data..= key)
          ]
      )

instance Data.ToPath GetTagValues where
  toPath = Prelude.const "/"

instance Data.ToQuery GetTagValues where
  toQuery = Prelude.const Prelude.mempty

-- | /See:/ 'newGetTagValuesResponse' smart constructor.
data GetTagValuesResponse = GetTagValuesResponse'
  { -- | A string that indicates that there is more data available than this
    -- response contains. To receive the next part of the response, specify
    -- this response value as the @PaginationToken@ value in the request for
    -- the next page.
    paginationToken :: Prelude.Maybe Prelude.Text,
    -- | A list of all tag values for the specified key currently used in the
    -- specified Amazon Web Services Region for the calling account.
    tagValues :: Prelude.Maybe [Prelude.Text],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetTagValuesResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'paginationToken', 'getTagValuesResponse_paginationToken' - A string that indicates that there is more data available than this
-- response contains. To receive the next part of the response, specify
-- this response value as the @PaginationToken@ value in the request for
-- the next page.
--
-- 'tagValues', 'getTagValuesResponse_tagValues' - A list of all tag values for the specified key currently used in the
-- specified Amazon Web Services Region for the calling account.
--
-- 'httpStatus', 'getTagValuesResponse_httpStatus' - The response's http status code.
newGetTagValuesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  GetTagValuesResponse
newGetTagValuesResponse pHttpStatus_ =
  GetTagValuesResponse'
    { paginationToken =
        Prelude.Nothing,
      tagValues = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A string that indicates that there is more data available than this
-- response contains. To receive the next part of the response, specify
-- this response value as the @PaginationToken@ value in the request for
-- the next page.
getTagValuesResponse_paginationToken :: Lens.Lens' GetTagValuesResponse (Prelude.Maybe Prelude.Text)
getTagValuesResponse_paginationToken = Lens.lens (\GetTagValuesResponse' {paginationToken} -> paginationToken) (\s@GetTagValuesResponse' {} a -> s {paginationToken = a} :: GetTagValuesResponse)

-- | A list of all tag values for the specified key currently used in the
-- specified Amazon Web Services Region for the calling account.
getTagValuesResponse_tagValues :: Lens.Lens' GetTagValuesResponse (Prelude.Maybe [Prelude.Text])
getTagValuesResponse_tagValues = Lens.lens (\GetTagValuesResponse' {tagValues} -> tagValues) (\s@GetTagValuesResponse' {} a -> s {tagValues = a} :: GetTagValuesResponse) Prelude.. Lens.mapping Lens.coerced

-- | The response's http status code.
getTagValuesResponse_httpStatus :: Lens.Lens' GetTagValuesResponse Prelude.Int
getTagValuesResponse_httpStatus = Lens.lens (\GetTagValuesResponse' {httpStatus} -> httpStatus) (\s@GetTagValuesResponse' {} a -> s {httpStatus = a} :: GetTagValuesResponse)

instance Prelude.NFData GetTagValuesResponse where
  rnf GetTagValuesResponse' {..} =
    Prelude.rnf paginationToken
      `Prelude.seq` Prelude.rnf tagValues
      `Prelude.seq` Prelude.rnf httpStatus