{-# 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.BackupGateway.ListHypervisors
-- 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 your hypervisors.
--
-- This operation returns paginated results.
module Amazonka.BackupGateway.ListHypervisors
  ( -- * Creating a Request
    ListHypervisors (..),
    newListHypervisors,

    -- * Request Lenses
    listHypervisors_maxResults,
    listHypervisors_nextToken,

    -- * Destructuring the Response
    ListHypervisorsResponse (..),
    newListHypervisorsResponse,

    -- * Response Lenses
    listHypervisorsResponse_hypervisors,
    listHypervisorsResponse_nextToken,
    listHypervisorsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListHypervisors' smart constructor.
data ListHypervisors = ListHypervisors'
  { -- | The maximum number of hypervisors to list.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The next item following a partial list of returned resources. For
    -- example, if a request is made to return @maxResults@ number of
    -- resources, @NextToken@ allows you to return more items in your list
    -- starting at the location pointed to by the next token.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListHypervisors' 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', 'listHypervisors_maxResults' - The maximum number of hypervisors to list.
--
-- 'nextToken', 'listHypervisors_nextToken' - The next item following a partial list of returned resources. For
-- example, if a request is made to return @maxResults@ number of
-- resources, @NextToken@ allows you to return more items in your list
-- starting at the location pointed to by the next token.
newListHypervisors ::
  ListHypervisors
newListHypervisors =
  ListHypervisors'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of hypervisors to list.
listHypervisors_maxResults :: Lens.Lens' ListHypervisors (Prelude.Maybe Prelude.Natural)
listHypervisors_maxResults = Lens.lens (\ListHypervisors' {maxResults} -> maxResults) (\s@ListHypervisors' {} a -> s {maxResults = a} :: ListHypervisors)

-- | The next item following a partial list of returned resources. For
-- example, if a request is made to return @maxResults@ number of
-- resources, @NextToken@ allows you to return more items in your list
-- starting at the location pointed to by the next token.
listHypervisors_nextToken :: Lens.Lens' ListHypervisors (Prelude.Maybe Prelude.Text)
listHypervisors_nextToken = Lens.lens (\ListHypervisors' {nextToken} -> nextToken) (\s@ListHypervisors' {} a -> s {nextToken = a} :: ListHypervisors)

instance Core.AWSPager ListHypervisors where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listHypervisorsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listHypervisorsResponse_hypervisors
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listHypervisors_nextToken
          Lens..~ rs
          Lens.^? listHypervisorsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

instance Data.ToHeaders ListHypervisors where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "BackupOnPremises_v20210101.ListHypervisors" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.0" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON ListHypervisors where
  toJSON ListHypervisors' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken
          ]
      )

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

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

-- | /See:/ 'newListHypervisorsResponse' smart constructor.
data ListHypervisorsResponse = ListHypervisorsResponse'
  { -- | A list of your @Hypervisor@ objects, ordered by their Amazon Resource
    -- Names (ARNs).
    hypervisors :: Prelude.Maybe [Hypervisor],
    -- | The next item following a partial list of returned resources. For
    -- example, if a request is made to return @maxResults@ number of
    -- resources, @NextToken@ allows you to return more items in your list
    -- starting at the location pointed to by the next token.
    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 'ListHypervisorsResponse' 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:
--
-- 'hypervisors', 'listHypervisorsResponse_hypervisors' - A list of your @Hypervisor@ objects, ordered by their Amazon Resource
-- Names (ARNs).
--
-- 'nextToken', 'listHypervisorsResponse_nextToken' - The next item following a partial list of returned resources. For
-- example, if a request is made to return @maxResults@ number of
-- resources, @NextToken@ allows you to return more items in your list
-- starting at the location pointed to by the next token.
--
-- 'httpStatus', 'listHypervisorsResponse_httpStatus' - The response's http status code.
newListHypervisorsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListHypervisorsResponse
newListHypervisorsResponse pHttpStatus_ =
  ListHypervisorsResponse'
    { hypervisors =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of your @Hypervisor@ objects, ordered by their Amazon Resource
-- Names (ARNs).
listHypervisorsResponse_hypervisors :: Lens.Lens' ListHypervisorsResponse (Prelude.Maybe [Hypervisor])
listHypervisorsResponse_hypervisors = Lens.lens (\ListHypervisorsResponse' {hypervisors} -> hypervisors) (\s@ListHypervisorsResponse' {} a -> s {hypervisors = a} :: ListHypervisorsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The next item following a partial list of returned resources. For
-- example, if a request is made to return @maxResults@ number of
-- resources, @NextToken@ allows you to return more items in your list
-- starting at the location pointed to by the next token.
listHypervisorsResponse_nextToken :: Lens.Lens' ListHypervisorsResponse (Prelude.Maybe Prelude.Text)
listHypervisorsResponse_nextToken = Lens.lens (\ListHypervisorsResponse' {nextToken} -> nextToken) (\s@ListHypervisorsResponse' {} a -> s {nextToken = a} :: ListHypervisorsResponse)

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

instance Prelude.NFData ListHypervisorsResponse where
  rnf ListHypervisorsResponse' {..} =
    Prelude.rnf hypervisors
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus