{-# 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.Location.ListRouteCalculators
-- 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 route calculator resources in your AWS account.
--
-- This operation returns paginated results.
module Amazonka.Location.ListRouteCalculators
  ( -- * Creating a Request
    ListRouteCalculators (..),
    newListRouteCalculators,

    -- * Request Lenses
    listRouteCalculators_maxResults,
    listRouteCalculators_nextToken,

    -- * Destructuring the Response
    ListRouteCalculatorsResponse (..),
    newListRouteCalculatorsResponse,

    -- * Response Lenses
    listRouteCalculatorsResponse_nextToken,
    listRouteCalculatorsResponse_httpStatus,
    listRouteCalculatorsResponse_entries,
  )
where

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

-- | /See:/ 'newListRouteCalculators' smart constructor.
data ListRouteCalculators = ListRouteCalculators'
  { -- | An optional maximum number of results returned in a single call.
    --
    -- Default Value: @100@
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The pagination token specifying which page of results to return in the
    -- response. If no token is provided, the default page is the first page.
    --
    -- Default Value: @null@
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListRouteCalculators' 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', 'listRouteCalculators_maxResults' - An optional maximum number of results returned in a single call.
--
-- Default Value: @100@
--
-- 'nextToken', 'listRouteCalculators_nextToken' - The pagination token specifying which page of results to return in the
-- response. If no token is provided, the default page is the first page.
--
-- Default Value: @null@
newListRouteCalculators ::
  ListRouteCalculators
newListRouteCalculators =
  ListRouteCalculators'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | An optional maximum number of results returned in a single call.
--
-- Default Value: @100@
listRouteCalculators_maxResults :: Lens.Lens' ListRouteCalculators (Prelude.Maybe Prelude.Natural)
listRouteCalculators_maxResults = Lens.lens (\ListRouteCalculators' {maxResults} -> maxResults) (\s@ListRouteCalculators' {} a -> s {maxResults = a} :: ListRouteCalculators)

-- | The pagination token specifying which page of results to return in the
-- response. If no token is provided, the default page is the first page.
--
-- Default Value: @null@
listRouteCalculators_nextToken :: Lens.Lens' ListRouteCalculators (Prelude.Maybe Prelude.Text)
listRouteCalculators_nextToken = Lens.lens (\ListRouteCalculators' {nextToken} -> nextToken) (\s@ListRouteCalculators' {} a -> s {nextToken = a} :: ListRouteCalculators)

instance Core.AWSPager ListRouteCalculators where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listRouteCalculatorsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        (rs Lens.^. listRouteCalculatorsResponse_entries) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listRouteCalculators_nextToken
          Lens..~ rs
          Lens.^? listRouteCalculatorsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

instance Data.ToHeaders ListRouteCalculators where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

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

instance Data.ToPath ListRouteCalculators where
  toPath = Prelude.const "/routes/v0/list-calculators"

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

-- | /See:/ 'newListRouteCalculatorsResponse' smart constructor.
data ListRouteCalculatorsResponse = ListRouteCalculatorsResponse'
  { -- | A pagination token indicating there are additional pages available. You
    -- can use the token in a subsequent request to fetch the next set of
    -- results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | Lists the route calculator resources that exist in your AWS account
    entries :: [ListRouteCalculatorsResponseEntry]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListRouteCalculatorsResponse' 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', 'listRouteCalculatorsResponse_nextToken' - A pagination token indicating there are additional pages available. You
-- can use the token in a subsequent request to fetch the next set of
-- results.
--
-- 'httpStatus', 'listRouteCalculatorsResponse_httpStatus' - The response's http status code.
--
-- 'entries', 'listRouteCalculatorsResponse_entries' - Lists the route calculator resources that exist in your AWS account
newListRouteCalculatorsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListRouteCalculatorsResponse
newListRouteCalculatorsResponse pHttpStatus_ =
  ListRouteCalculatorsResponse'
    { nextToken =
        Prelude.Nothing,
      httpStatus = pHttpStatus_,
      entries = Prelude.mempty
    }

-- | A pagination token indicating there are additional pages available. You
-- can use the token in a subsequent request to fetch the next set of
-- results.
listRouteCalculatorsResponse_nextToken :: Lens.Lens' ListRouteCalculatorsResponse (Prelude.Maybe Prelude.Text)
listRouteCalculatorsResponse_nextToken = Lens.lens (\ListRouteCalculatorsResponse' {nextToken} -> nextToken) (\s@ListRouteCalculatorsResponse' {} a -> s {nextToken = a} :: ListRouteCalculatorsResponse)

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

-- | Lists the route calculator resources that exist in your AWS account
listRouteCalculatorsResponse_entries :: Lens.Lens' ListRouteCalculatorsResponse [ListRouteCalculatorsResponseEntry]
listRouteCalculatorsResponse_entries = Lens.lens (\ListRouteCalculatorsResponse' {entries} -> entries) (\s@ListRouteCalculatorsResponse' {} a -> s {entries = a} :: ListRouteCalculatorsResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListRouteCalculatorsResponse where
  rnf ListRouteCalculatorsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf entries