{-# 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.MemoryDb.DescribeEngineVersions
-- 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 a list of the available Redis engine versions.
--
-- This operation returns paginated results.
module Amazonka.MemoryDb.DescribeEngineVersions
  ( -- * Creating a Request
    DescribeEngineVersions (..),
    newDescribeEngineVersions,

    -- * Request Lenses
    describeEngineVersions_defaultOnly,
    describeEngineVersions_engineVersion,
    describeEngineVersions_maxResults,
    describeEngineVersions_nextToken,
    describeEngineVersions_parameterGroupFamily,

    -- * Destructuring the Response
    DescribeEngineVersionsResponse (..),
    newDescribeEngineVersionsResponse,

    -- * Response Lenses
    describeEngineVersionsResponse_engineVersions,
    describeEngineVersionsResponse_nextToken,
    describeEngineVersionsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newDescribeEngineVersions' smart constructor.
data DescribeEngineVersions = DescribeEngineVersions'
  { -- | If true, specifies that only the default version of the specified engine
    -- or engine and major version combination is to be returned.
    defaultOnly :: Prelude.Maybe Prelude.Bool,
    -- | The Redis engine version
    engineVersion :: Prelude.Maybe Prelude.Text,
    -- | The maximum number of records to include in the response. If more
    -- records exist than the specified MaxResults value, a token is included
    -- in the response so that the remaining results can be retrieved.
    maxResults :: Prelude.Maybe Prelude.Int,
    -- | An optional argument to pass in case the total number of records exceeds
    -- the value of MaxResults. If nextToken is returned, there are more
    -- results available. The value of nextToken is a unique pagination token
    -- for each page. Make the call again using the returned token to retrieve
    -- the next page. Keep all other arguments unchanged.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The name of a specific parameter group family to return details for.
    parameterGroupFamily :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeEngineVersions' 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:
--
-- 'defaultOnly', 'describeEngineVersions_defaultOnly' - If true, specifies that only the default version of the specified engine
-- or engine and major version combination is to be returned.
--
-- 'engineVersion', 'describeEngineVersions_engineVersion' - The Redis engine version
--
-- 'maxResults', 'describeEngineVersions_maxResults' - The maximum number of records to include in the response. If more
-- records exist than the specified MaxResults value, a token is included
-- in the response so that the remaining results can be retrieved.
--
-- 'nextToken', 'describeEngineVersions_nextToken' - An optional argument to pass in case the total number of records exceeds
-- the value of MaxResults. If nextToken is returned, there are more
-- results available. The value of nextToken is a unique pagination token
-- for each page. Make the call again using the returned token to retrieve
-- the next page. Keep all other arguments unchanged.
--
-- 'parameterGroupFamily', 'describeEngineVersions_parameterGroupFamily' - The name of a specific parameter group family to return details for.
newDescribeEngineVersions ::
  DescribeEngineVersions
newDescribeEngineVersions =
  DescribeEngineVersions'
    { defaultOnly =
        Prelude.Nothing,
      engineVersion = Prelude.Nothing,
      maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      parameterGroupFamily = Prelude.Nothing
    }

-- | If true, specifies that only the default version of the specified engine
-- or engine and major version combination is to be returned.
describeEngineVersions_defaultOnly :: Lens.Lens' DescribeEngineVersions (Prelude.Maybe Prelude.Bool)
describeEngineVersions_defaultOnly = Lens.lens (\DescribeEngineVersions' {defaultOnly} -> defaultOnly) (\s@DescribeEngineVersions' {} a -> s {defaultOnly = a} :: DescribeEngineVersions)

-- | The Redis engine version
describeEngineVersions_engineVersion :: Lens.Lens' DescribeEngineVersions (Prelude.Maybe Prelude.Text)
describeEngineVersions_engineVersion = Lens.lens (\DescribeEngineVersions' {engineVersion} -> engineVersion) (\s@DescribeEngineVersions' {} a -> s {engineVersion = a} :: DescribeEngineVersions)

-- | The maximum number of records to include in the response. If more
-- records exist than the specified MaxResults value, a token is included
-- in the response so that the remaining results can be retrieved.
describeEngineVersions_maxResults :: Lens.Lens' DescribeEngineVersions (Prelude.Maybe Prelude.Int)
describeEngineVersions_maxResults = Lens.lens (\DescribeEngineVersions' {maxResults} -> maxResults) (\s@DescribeEngineVersions' {} a -> s {maxResults = a} :: DescribeEngineVersions)

-- | An optional argument to pass in case the total number of records exceeds
-- the value of MaxResults. If nextToken is returned, there are more
-- results available. The value of nextToken is a unique pagination token
-- for each page. Make the call again using the returned token to retrieve
-- the next page. Keep all other arguments unchanged.
describeEngineVersions_nextToken :: Lens.Lens' DescribeEngineVersions (Prelude.Maybe Prelude.Text)
describeEngineVersions_nextToken = Lens.lens (\DescribeEngineVersions' {nextToken} -> nextToken) (\s@DescribeEngineVersions' {} a -> s {nextToken = a} :: DescribeEngineVersions)

-- | The name of a specific parameter group family to return details for.
describeEngineVersions_parameterGroupFamily :: Lens.Lens' DescribeEngineVersions (Prelude.Maybe Prelude.Text)
describeEngineVersions_parameterGroupFamily = Lens.lens (\DescribeEngineVersions' {parameterGroupFamily} -> parameterGroupFamily) (\s@DescribeEngineVersions' {} a -> s {parameterGroupFamily = a} :: DescribeEngineVersions)

instance Core.AWSPager DescribeEngineVersions where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeEngineVersionsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeEngineVersionsResponse_engineVersions
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeEngineVersions_nextToken
          Lens..~ rs
          Lens.^? describeEngineVersionsResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable DescribeEngineVersions where
  hashWithSalt _salt DescribeEngineVersions' {..} =
    _salt
      `Prelude.hashWithSalt` defaultOnly
      `Prelude.hashWithSalt` engineVersion
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` parameterGroupFamily

instance Prelude.NFData DescribeEngineVersions where
  rnf DescribeEngineVersions' {..} =
    Prelude.rnf defaultOnly
      `Prelude.seq` Prelude.rnf engineVersion
      `Prelude.seq` Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf parameterGroupFamily

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

instance Data.ToJSON DescribeEngineVersions where
  toJSON DescribeEngineVersions' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("DefaultOnly" Data..=) Prelude.<$> defaultOnly,
            ("EngineVersion" Data..=) Prelude.<$> engineVersion,
            ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            ("ParameterGroupFamily" Data..=)
              Prelude.<$> parameterGroupFamily
          ]
      )

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

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

-- | /See:/ 'newDescribeEngineVersionsResponse' smart constructor.
data DescribeEngineVersionsResponse = DescribeEngineVersionsResponse'
  { -- | A list of engine version details. Each element in the list contains
    -- detailed information about one engine version.
    engineVersions :: Prelude.Maybe [EngineVersionInfo],
    -- | An optional argument to pass in case the total number of records exceeds
    -- the value of MaxResults. If nextToken is returned, there are more
    -- results available. The value of nextToken is a unique pagination token
    -- for each page. Make the call again using the returned token to retrieve
    -- the next page. Keep all other arguments unchanged.
    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 'DescribeEngineVersionsResponse' 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:
--
-- 'engineVersions', 'describeEngineVersionsResponse_engineVersions' - A list of engine version details. Each element in the list contains
-- detailed information about one engine version.
--
-- 'nextToken', 'describeEngineVersionsResponse_nextToken' - An optional argument to pass in case the total number of records exceeds
-- the value of MaxResults. If nextToken is returned, there are more
-- results available. The value of nextToken is a unique pagination token
-- for each page. Make the call again using the returned token to retrieve
-- the next page. Keep all other arguments unchanged.
--
-- 'httpStatus', 'describeEngineVersionsResponse_httpStatus' - The response's http status code.
newDescribeEngineVersionsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeEngineVersionsResponse
newDescribeEngineVersionsResponse pHttpStatus_ =
  DescribeEngineVersionsResponse'
    { engineVersions =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of engine version details. Each element in the list contains
-- detailed information about one engine version.
describeEngineVersionsResponse_engineVersions :: Lens.Lens' DescribeEngineVersionsResponse (Prelude.Maybe [EngineVersionInfo])
describeEngineVersionsResponse_engineVersions = Lens.lens (\DescribeEngineVersionsResponse' {engineVersions} -> engineVersions) (\s@DescribeEngineVersionsResponse' {} a -> s {engineVersions = a} :: DescribeEngineVersionsResponse) Prelude.. Lens.mapping Lens.coerced

-- | An optional argument to pass in case the total number of records exceeds
-- the value of MaxResults. If nextToken is returned, there are more
-- results available. The value of nextToken is a unique pagination token
-- for each page. Make the call again using the returned token to retrieve
-- the next page. Keep all other arguments unchanged.
describeEngineVersionsResponse_nextToken :: Lens.Lens' DescribeEngineVersionsResponse (Prelude.Maybe Prelude.Text)
describeEngineVersionsResponse_nextToken = Lens.lens (\DescribeEngineVersionsResponse' {nextToken} -> nextToken) (\s@DescribeEngineVersionsResponse' {} a -> s {nextToken = a} :: DescribeEngineVersionsResponse)

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

instance
  Prelude.NFData
    DescribeEngineVersionsResponse
  where
  rnf DescribeEngineVersionsResponse' {..} =
    Prelude.rnf engineVersions
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus