{-# 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.AppConfig.ListEnvironments
-- 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 the environments for an application.
module Amazonka.AppConfig.ListEnvironments
  ( -- * Creating a Request
    ListEnvironments (..),
    newListEnvironments,

    -- * Request Lenses
    listEnvironments_maxResults,
    listEnvironments_nextToken,
    listEnvironments_applicationId,

    -- * Destructuring the Response
    ListEnvironmentsResponse (..),
    newListEnvironmentsResponse,

    -- * Response Lenses
    listEnvironmentsResponse_items,
    listEnvironmentsResponse_nextToken,
    listEnvironmentsResponse_httpStatus,
  )
where

import Amazonka.AppConfig.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:/ 'newListEnvironments' smart constructor.
data ListEnvironments = ListEnvironments'
  { -- | The maximum number of items to return for this call. The call also
    -- returns a token that you can specify in a subsequent call to get the
    -- next set of results.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | A token to start the list. Use this token to get the next set of
    -- results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The application ID.
    applicationId :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListEnvironments' 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', 'listEnvironments_maxResults' - The maximum number of items to return for this call. The call also
-- returns a token that you can specify in a subsequent call to get the
-- next set of results.
--
-- 'nextToken', 'listEnvironments_nextToken' - A token to start the list. Use this token to get the next set of
-- results.
--
-- 'applicationId', 'listEnvironments_applicationId' - The application ID.
newListEnvironments ::
  -- | 'applicationId'
  Prelude.Text ->
  ListEnvironments
newListEnvironments pApplicationId_ =
  ListEnvironments'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      applicationId = pApplicationId_
    }

-- | The maximum number of items to return for this call. The call also
-- returns a token that you can specify in a subsequent call to get the
-- next set of results.
listEnvironments_maxResults :: Lens.Lens' ListEnvironments (Prelude.Maybe Prelude.Natural)
listEnvironments_maxResults = Lens.lens (\ListEnvironments' {maxResults} -> maxResults) (\s@ListEnvironments' {} a -> s {maxResults = a} :: ListEnvironments)

-- | A token to start the list. Use this token to get the next set of
-- results.
listEnvironments_nextToken :: Lens.Lens' ListEnvironments (Prelude.Maybe Prelude.Text)
listEnvironments_nextToken = Lens.lens (\ListEnvironments' {nextToken} -> nextToken) (\s@ListEnvironments' {} a -> s {nextToken = a} :: ListEnvironments)

-- | The application ID.
listEnvironments_applicationId :: Lens.Lens' ListEnvironments Prelude.Text
listEnvironments_applicationId = Lens.lens (\ListEnvironments' {applicationId} -> applicationId) (\s@ListEnvironments' {} a -> s {applicationId = a} :: ListEnvironments)

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

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

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

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

instance Data.ToPath ListEnvironments where
  toPath ListEnvironments' {..} =
    Prelude.mconcat
      [ "/applications/",
        Data.toBS applicationId,
        "/environments"
      ]

instance Data.ToQuery ListEnvironments where
  toQuery ListEnvironments' {..} =
    Prelude.mconcat
      [ "max_results" Data.=: maxResults,
        "next_token" Data.=: nextToken
      ]

-- | /See:/ 'newListEnvironmentsResponse' smart constructor.
data ListEnvironmentsResponse = ListEnvironmentsResponse'
  { -- | The elements from this collection.
    items :: Prelude.Maybe [Environment],
    -- | The token for the next set of items to return. Use this token to get the
    -- next set of results.
    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 'ListEnvironmentsResponse' 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:
--
-- 'items', 'listEnvironmentsResponse_items' - The elements from this collection.
--
-- 'nextToken', 'listEnvironmentsResponse_nextToken' - The token for the next set of items to return. Use this token to get the
-- next set of results.
--
-- 'httpStatus', 'listEnvironmentsResponse_httpStatus' - The response's http status code.
newListEnvironmentsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListEnvironmentsResponse
newListEnvironmentsResponse pHttpStatus_ =
  ListEnvironmentsResponse'
    { items = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The elements from this collection.
listEnvironmentsResponse_items :: Lens.Lens' ListEnvironmentsResponse (Prelude.Maybe [Environment])
listEnvironmentsResponse_items = Lens.lens (\ListEnvironmentsResponse' {items} -> items) (\s@ListEnvironmentsResponse' {} a -> s {items = a} :: ListEnvironmentsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The token for the next set of items to return. Use this token to get the
-- next set of results.
listEnvironmentsResponse_nextToken :: Lens.Lens' ListEnvironmentsResponse (Prelude.Maybe Prelude.Text)
listEnvironmentsResponse_nextToken = Lens.lens (\ListEnvironmentsResponse' {nextToken} -> nextToken) (\s@ListEnvironmentsResponse' {} a -> s {nextToken = a} :: ListEnvironmentsResponse)

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

instance Prelude.NFData ListEnvironmentsResponse where
  rnf ListEnvironmentsResponse' {..} =
    Prelude.rnf items
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus