{-# 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.DirectoryService.DescribeRegions
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Provides information about the Regions that are configured for
-- multi-Region replication.
--
-- This operation returns paginated results.
module Amazonka.DirectoryService.DescribeRegions
  ( -- * Creating a Request
    DescribeRegions (..),
    newDescribeRegions,

    -- * Request Lenses
    describeRegions_nextToken,
    describeRegions_regionName,
    describeRegions_directoryId,

    -- * Destructuring the Response
    DescribeRegionsResponse (..),
    newDescribeRegionsResponse,

    -- * Response Lenses
    describeRegionsResponse_nextToken,
    describeRegionsResponse_regionsDescription,
    describeRegionsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newDescribeRegions' smart constructor.
data DescribeRegions = DescribeRegions'
  { -- | The @DescribeRegionsResult.NextToken@ value from a previous call to
    -- DescribeRegions. Pass null if this is the first call.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The name of the Region. For example, @us-east-1@.
    regionName :: Prelude.Maybe Prelude.Text,
    -- | The identifier of the directory.
    directoryId :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeRegions' 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', 'describeRegions_nextToken' - The @DescribeRegionsResult.NextToken@ value from a previous call to
-- DescribeRegions. Pass null if this is the first call.
--
-- 'regionName', 'describeRegions_regionName' - The name of the Region. For example, @us-east-1@.
--
-- 'directoryId', 'describeRegions_directoryId' - The identifier of the directory.
newDescribeRegions ::
  -- | 'directoryId'
  Prelude.Text ->
  DescribeRegions
newDescribeRegions pDirectoryId_ =
  DescribeRegions'
    { nextToken = Prelude.Nothing,
      regionName = Prelude.Nothing,
      directoryId = pDirectoryId_
    }

-- | The @DescribeRegionsResult.NextToken@ value from a previous call to
-- DescribeRegions. Pass null if this is the first call.
describeRegions_nextToken :: Lens.Lens' DescribeRegions (Prelude.Maybe Prelude.Text)
describeRegions_nextToken = Lens.lens (\DescribeRegions' {nextToken} -> nextToken) (\s@DescribeRegions' {} a -> s {nextToken = a} :: DescribeRegions)

-- | The name of the Region. For example, @us-east-1@.
describeRegions_regionName :: Lens.Lens' DescribeRegions (Prelude.Maybe Prelude.Text)
describeRegions_regionName = Lens.lens (\DescribeRegions' {regionName} -> regionName) (\s@DescribeRegions' {} a -> s {regionName = a} :: DescribeRegions)

-- | The identifier of the directory.
describeRegions_directoryId :: Lens.Lens' DescribeRegions Prelude.Text
describeRegions_directoryId = Lens.lens (\DescribeRegions' {directoryId} -> directoryId) (\s@DescribeRegions' {} a -> s {directoryId = a} :: DescribeRegions)

instance Core.AWSPager DescribeRegions where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeRegionsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeRegionsResponse_regionsDescription
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeRegions_nextToken
          Lens..~ rs
          Lens.^? describeRegionsResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable DescribeRegions where
  hashWithSalt _salt DescribeRegions' {..} =
    _salt
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` regionName
      `Prelude.hashWithSalt` directoryId

instance Prelude.NFData DescribeRegions where
  rnf DescribeRegions' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf regionName
      `Prelude.seq` Prelude.rnf directoryId

instance Data.ToHeaders DescribeRegions where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "DirectoryService_20150416.DescribeRegions" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON DescribeRegions where
  toJSON DescribeRegions' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("NextToken" Data..=) Prelude.<$> nextToken,
            ("RegionName" Data..=) Prelude.<$> regionName,
            Prelude.Just ("DirectoryId" Data..= directoryId)
          ]
      )

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

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

-- | /See:/ 'newDescribeRegionsResponse' smart constructor.
data DescribeRegionsResponse = DescribeRegionsResponse'
  { -- | If not null, more results are available. Pass this value for the
    -- @NextToken@ parameter in a subsequent call to DescribeRegions to
    -- retrieve the next set of items.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | List of Region information related to the directory for each replicated
    -- Region.
    regionsDescription :: Prelude.Maybe [RegionDescription],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeRegionsResponse' 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', 'describeRegionsResponse_nextToken' - If not null, more results are available. Pass this value for the
-- @NextToken@ parameter in a subsequent call to DescribeRegions to
-- retrieve the next set of items.
--
-- 'regionsDescription', 'describeRegionsResponse_regionsDescription' - List of Region information related to the directory for each replicated
-- Region.
--
-- 'httpStatus', 'describeRegionsResponse_httpStatus' - The response's http status code.
newDescribeRegionsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeRegionsResponse
newDescribeRegionsResponse pHttpStatus_ =
  DescribeRegionsResponse'
    { nextToken =
        Prelude.Nothing,
      regionsDescription = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | If not null, more results are available. Pass this value for the
-- @NextToken@ parameter in a subsequent call to DescribeRegions to
-- retrieve the next set of items.
describeRegionsResponse_nextToken :: Lens.Lens' DescribeRegionsResponse (Prelude.Maybe Prelude.Text)
describeRegionsResponse_nextToken = Lens.lens (\DescribeRegionsResponse' {nextToken} -> nextToken) (\s@DescribeRegionsResponse' {} a -> s {nextToken = a} :: DescribeRegionsResponse)

-- | List of Region information related to the directory for each replicated
-- Region.
describeRegionsResponse_regionsDescription :: Lens.Lens' DescribeRegionsResponse (Prelude.Maybe [RegionDescription])
describeRegionsResponse_regionsDescription = Lens.lens (\DescribeRegionsResponse' {regionsDescription} -> regionsDescription) (\s@DescribeRegionsResponse' {} a -> s {regionsDescription = a} :: DescribeRegionsResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData DescribeRegionsResponse where
  rnf DescribeRegionsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf regionsDescription
      `Prelude.seq` Prelude.rnf httpStatus