{-# 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.IoT.ListIndices
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Lists the search indices.
--
-- Requires permission to access the
-- <https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsiot.html#awsiot-actions-as-permissions ListIndices>
-- action.
--
-- This operation returns paginated results.
module Amazonka.IoT.ListIndices
  ( -- * Creating a Request
    ListIndices (..),
    newListIndices,

    -- * Request Lenses
    listIndices_maxResults,
    listIndices_nextToken,

    -- * Destructuring the Response
    ListIndicesResponse (..),
    newListIndicesResponse,

    -- * Response Lenses
    listIndicesResponse_indexNames,
    listIndicesResponse_nextToken,
    listIndicesResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListIndices' smart constructor.
data ListIndices = ListIndices'
  { -- | The maximum number of results to return at one time.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token used to get the next set of results, or @null@ if there are no
    -- additional results.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListIndices' 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:
--
-- 'maxResults', 'listIndices_maxResults' - The maximum number of results to return at one time.
--
-- 'nextToken', 'listIndices_nextToken' - The token used to get the next set of results, or @null@ if there are no
-- additional results.
newListIndices ::
  ListIndices
newListIndices =
  ListIndices'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of results to return at one time.
listIndices_maxResults :: Lens.Lens' ListIndices (Prelude.Maybe Prelude.Natural)
listIndices_maxResults = Lens.lens (\ListIndices' {maxResults} -> maxResults) (\s@ListIndices' {} a -> s {maxResults = a} :: ListIndices)

-- | The token used to get the next set of results, or @null@ if there are no
-- additional results.
listIndices_nextToken :: Lens.Lens' ListIndices (Prelude.Maybe Prelude.Text)
listIndices_nextToken = Lens.lens (\ListIndices' {nextToken} -> nextToken) (\s@ListIndices' {} a -> s {nextToken = a} :: ListIndices)

instance Core.AWSPager ListIndices where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listIndicesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listIndicesResponse_indexNames
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listIndices_nextToken
          Lens..~ rs
          Lens.^? listIndicesResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest ListIndices where
  type AWSResponse ListIndices = ListIndicesResponse
  request overrides =
    Request.get (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          ListIndicesResponse'
            Prelude.<$> (x Data..?> "indexNames" Core..!@ Prelude.mempty)
            Prelude.<*> (x Data..?> "nextToken")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable ListIndices where
  hashWithSalt _salt ListIndices' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken

instance Prelude.NFData ListIndices where
  rnf ListIndices' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken

instance Data.ToHeaders ListIndices where
  toHeaders = Prelude.const Prelude.mempty

instance Data.ToPath ListIndices where
  toPath = Prelude.const "/indices"

instance Data.ToQuery ListIndices where
  toQuery ListIndices' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken
      ]

-- | /See:/ 'newListIndicesResponse' smart constructor.
data ListIndicesResponse = ListIndicesResponse'
  { -- | The index names.
    indexNames :: Prelude.Maybe [Prelude.Text],
    -- | The token used to get the next set of results, or @null@ if there are no
    -- additional results.
    nextToken :: 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 'ListIndicesResponse' 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:
--
-- 'indexNames', 'listIndicesResponse_indexNames' - The index names.
--
-- 'nextToken', 'listIndicesResponse_nextToken' - The token used to get the next set of results, or @null@ if there are no
-- additional results.
--
-- 'httpStatus', 'listIndicesResponse_httpStatus' - The response's http status code.
newListIndicesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListIndicesResponse
newListIndicesResponse pHttpStatus_ =
  ListIndicesResponse'
    { indexNames = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The index names.
listIndicesResponse_indexNames :: Lens.Lens' ListIndicesResponse (Prelude.Maybe [Prelude.Text])
listIndicesResponse_indexNames = Lens.lens (\ListIndicesResponse' {indexNames} -> indexNames) (\s@ListIndicesResponse' {} a -> s {indexNames = a} :: ListIndicesResponse) Prelude.. Lens.mapping Lens.coerced

-- | The token used to get the next set of results, or @null@ if there are no
-- additional results.
listIndicesResponse_nextToken :: Lens.Lens' ListIndicesResponse (Prelude.Maybe Prelude.Text)
listIndicesResponse_nextToken = Lens.lens (\ListIndicesResponse' {nextToken} -> nextToken) (\s@ListIndicesResponse' {} a -> s {nextToken = a} :: ListIndicesResponse)

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

instance Prelude.NFData ListIndicesResponse where
  rnf ListIndicesResponse' {..} =
    Prelude.rnf indexNames
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus