{-# 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.EFS.DescribeFileSystemPolicy
-- 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 the @FileSystemPolicy@ for the specified EFS file system.
--
-- This operation requires permissions for the
-- @elasticfilesystem:DescribeFileSystemPolicy@ action.
module Amazonka.EFS.DescribeFileSystemPolicy
  ( -- * Creating a Request
    DescribeFileSystemPolicy (..),
    newDescribeFileSystemPolicy,

    -- * Request Lenses
    describeFileSystemPolicy_fileSystemId,

    -- * Destructuring the Response
    FileSystemPolicyDescription (..),
    newFileSystemPolicyDescription,

    -- * Response Lenses
    fileSystemPolicyDescription_fileSystemId,
    fileSystemPolicyDescription_policy,
  )
where

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

-- | /See:/ 'newDescribeFileSystemPolicy' smart constructor.
data DescribeFileSystemPolicy = DescribeFileSystemPolicy'
  { -- | Specifies which EFS file system to retrieve the @FileSystemPolicy@ for.
    fileSystemId :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeFileSystemPolicy' 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:
--
-- 'fileSystemId', 'describeFileSystemPolicy_fileSystemId' - Specifies which EFS file system to retrieve the @FileSystemPolicy@ for.
newDescribeFileSystemPolicy ::
  -- | 'fileSystemId'
  Prelude.Text ->
  DescribeFileSystemPolicy
newDescribeFileSystemPolicy pFileSystemId_ =
  DescribeFileSystemPolicy'
    { fileSystemId =
        pFileSystemId_
    }

-- | Specifies which EFS file system to retrieve the @FileSystemPolicy@ for.
describeFileSystemPolicy_fileSystemId :: Lens.Lens' DescribeFileSystemPolicy Prelude.Text
describeFileSystemPolicy_fileSystemId = Lens.lens (\DescribeFileSystemPolicy' {fileSystemId} -> fileSystemId) (\s@DescribeFileSystemPolicy' {} a -> s {fileSystemId = a} :: DescribeFileSystemPolicy)

instance Core.AWSRequest DescribeFileSystemPolicy where
  type
    AWSResponse DescribeFileSystemPolicy =
      FileSystemPolicyDescription
  request overrides =
    Request.get (overrides defaultService)
  response =
    Response.receiveJSON
      (\s h x -> Data.eitherParseJSON x)

instance Prelude.Hashable DescribeFileSystemPolicy where
  hashWithSalt _salt DescribeFileSystemPolicy' {..} =
    _salt `Prelude.hashWithSalt` fileSystemId

instance Prelude.NFData DescribeFileSystemPolicy where
  rnf DescribeFileSystemPolicy' {..} =
    Prelude.rnf fileSystemId

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

instance Data.ToPath DescribeFileSystemPolicy where
  toPath DescribeFileSystemPolicy' {..} =
    Prelude.mconcat
      [ "/2015-02-01/file-systems/",
        Data.toBS fileSystemId,
        "/policy"
      ]

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