{-# 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.ElasticSearch.DescribeReservedElasticsearchInstances
-- 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 information about reserved Elasticsearch instances for this
-- account.
--
-- This operation returns paginated results.
module Amazonka.ElasticSearch.DescribeReservedElasticsearchInstances
  ( -- * Creating a Request
    DescribeReservedElasticsearchInstances (..),
    newDescribeReservedElasticsearchInstances,

    -- * Request Lenses
    describeReservedElasticsearchInstances_maxResults,
    describeReservedElasticsearchInstances_nextToken,
    describeReservedElasticsearchInstances_reservedElasticsearchInstanceId,

    -- * Destructuring the Response
    DescribeReservedElasticsearchInstancesResponse (..),
    newDescribeReservedElasticsearchInstancesResponse,

    -- * Response Lenses
    describeReservedElasticsearchInstancesResponse_nextToken,
    describeReservedElasticsearchInstancesResponse_reservedElasticsearchInstances,
    describeReservedElasticsearchInstancesResponse_httpStatus,
  )
where

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

-- | Container for parameters to @DescribeReservedElasticsearchInstances@
--
-- /See:/ 'newDescribeReservedElasticsearchInstances' smart constructor.
data DescribeReservedElasticsearchInstances = DescribeReservedElasticsearchInstances'
  { -- | Set this value to limit the number of results returned. If not
    -- specified, defaults to 100.
    maxResults :: Prelude.Maybe Prelude.Int,
    -- | NextToken should be sent in case if earlier API call produced result
    -- containing NextToken. It is used for pagination.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The reserved instance identifier filter value. Use this parameter to
    -- show only the reservation that matches the specified reserved
    -- Elasticsearch instance ID.
    reservedElasticsearchInstanceId :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeReservedElasticsearchInstances' 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', 'describeReservedElasticsearchInstances_maxResults' - Set this value to limit the number of results returned. If not
-- specified, defaults to 100.
--
-- 'nextToken', 'describeReservedElasticsearchInstances_nextToken' - NextToken should be sent in case if earlier API call produced result
-- containing NextToken. It is used for pagination.
--
-- 'reservedElasticsearchInstanceId', 'describeReservedElasticsearchInstances_reservedElasticsearchInstanceId' - The reserved instance identifier filter value. Use this parameter to
-- show only the reservation that matches the specified reserved
-- Elasticsearch instance ID.
newDescribeReservedElasticsearchInstances ::
  DescribeReservedElasticsearchInstances
newDescribeReservedElasticsearchInstances =
  DescribeReservedElasticsearchInstances'
    { maxResults =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      reservedElasticsearchInstanceId =
        Prelude.Nothing
    }

-- | Set this value to limit the number of results returned. If not
-- specified, defaults to 100.
describeReservedElasticsearchInstances_maxResults :: Lens.Lens' DescribeReservedElasticsearchInstances (Prelude.Maybe Prelude.Int)
describeReservedElasticsearchInstances_maxResults = Lens.lens (\DescribeReservedElasticsearchInstances' {maxResults} -> maxResults) (\s@DescribeReservedElasticsearchInstances' {} a -> s {maxResults = a} :: DescribeReservedElasticsearchInstances)

-- | NextToken should be sent in case if earlier API call produced result
-- containing NextToken. It is used for pagination.
describeReservedElasticsearchInstances_nextToken :: Lens.Lens' DescribeReservedElasticsearchInstances (Prelude.Maybe Prelude.Text)
describeReservedElasticsearchInstances_nextToken = Lens.lens (\DescribeReservedElasticsearchInstances' {nextToken} -> nextToken) (\s@DescribeReservedElasticsearchInstances' {} a -> s {nextToken = a} :: DescribeReservedElasticsearchInstances)

-- | The reserved instance identifier filter value. Use this parameter to
-- show only the reservation that matches the specified reserved
-- Elasticsearch instance ID.
describeReservedElasticsearchInstances_reservedElasticsearchInstanceId :: Lens.Lens' DescribeReservedElasticsearchInstances (Prelude.Maybe Prelude.Text)
describeReservedElasticsearchInstances_reservedElasticsearchInstanceId = Lens.lens (\DescribeReservedElasticsearchInstances' {reservedElasticsearchInstanceId} -> reservedElasticsearchInstanceId) (\s@DescribeReservedElasticsearchInstances' {} a -> s {reservedElasticsearchInstanceId = a} :: DescribeReservedElasticsearchInstances)

instance
  Core.AWSPager
    DescribeReservedElasticsearchInstances
  where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeReservedElasticsearchInstancesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeReservedElasticsearchInstancesResponse_reservedElasticsearchInstances
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeReservedElasticsearchInstances_nextToken
          Lens..~ rs
          Lens.^? describeReservedElasticsearchInstancesResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

instance
  Data.ToPath
    DescribeReservedElasticsearchInstances
  where
  toPath =
    Prelude.const "/2015-01-01/es/reservedInstances"

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

-- | Container for results from @DescribeReservedElasticsearchInstances@
--
-- /See:/ 'newDescribeReservedElasticsearchInstancesResponse' smart constructor.
data DescribeReservedElasticsearchInstancesResponse = DescribeReservedElasticsearchInstancesResponse'
  { -- | Provides an identifier to allow retrieval of paginated results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | List of reserved Elasticsearch instances.
    reservedElasticsearchInstances :: Prelude.Maybe [ReservedElasticsearchInstance],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeReservedElasticsearchInstancesResponse' 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:
--
-- 'nextToken', 'describeReservedElasticsearchInstancesResponse_nextToken' - Provides an identifier to allow retrieval of paginated results.
--
-- 'reservedElasticsearchInstances', 'describeReservedElasticsearchInstancesResponse_reservedElasticsearchInstances' - List of reserved Elasticsearch instances.
--
-- 'httpStatus', 'describeReservedElasticsearchInstancesResponse_httpStatus' - The response's http status code.
newDescribeReservedElasticsearchInstancesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeReservedElasticsearchInstancesResponse
newDescribeReservedElasticsearchInstancesResponse
  pHttpStatus_ =
    DescribeReservedElasticsearchInstancesResponse'
      { nextToken =
          Prelude.Nothing,
        reservedElasticsearchInstances =
          Prelude.Nothing,
        httpStatus = pHttpStatus_
      }

-- | Provides an identifier to allow retrieval of paginated results.
describeReservedElasticsearchInstancesResponse_nextToken :: Lens.Lens' DescribeReservedElasticsearchInstancesResponse (Prelude.Maybe Prelude.Text)
describeReservedElasticsearchInstancesResponse_nextToken = Lens.lens (\DescribeReservedElasticsearchInstancesResponse' {nextToken} -> nextToken) (\s@DescribeReservedElasticsearchInstancesResponse' {} a -> s {nextToken = a} :: DescribeReservedElasticsearchInstancesResponse)

-- | List of reserved Elasticsearch instances.
describeReservedElasticsearchInstancesResponse_reservedElasticsearchInstances :: Lens.Lens' DescribeReservedElasticsearchInstancesResponse (Prelude.Maybe [ReservedElasticsearchInstance])
describeReservedElasticsearchInstancesResponse_reservedElasticsearchInstances = Lens.lens (\DescribeReservedElasticsearchInstancesResponse' {reservedElasticsearchInstances} -> reservedElasticsearchInstances) (\s@DescribeReservedElasticsearchInstancesResponse' {} a -> s {reservedElasticsearchInstances = a} :: DescribeReservedElasticsearchInstancesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance
  Prelude.NFData
    DescribeReservedElasticsearchInstancesResponse
  where
  rnf
    DescribeReservedElasticsearchInstancesResponse' {..} =
      Prelude.rnf nextToken
        `Prelude.seq` Prelude.rnf reservedElasticsearchInstances
        `Prelude.seq` Prelude.rnf httpStatus