{-# 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.EMRServerless.ListApplications
-- 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 applications based on a set of parameters.
--
-- This operation returns paginated results.
module Amazonka.EMRServerless.ListApplications
  ( -- * Creating a Request
    ListApplications (..),
    newListApplications,

    -- * Request Lenses
    listApplications_maxResults,
    listApplications_nextToken,
    listApplications_states,

    -- * Destructuring the Response
    ListApplicationsResponse (..),
    newListApplicationsResponse,

    -- * Response Lenses
    listApplicationsResponse_nextToken,
    listApplicationsResponse_httpStatus,
    listApplicationsResponse_applications,
  )
where

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

-- | /See:/ 'newListApplications' smart constructor.
data ListApplications = ListApplications'
  { -- | The maximum number of applications that can be listed.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token for the next set of application results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | An optional filter for application states. Note that if this filter
    -- contains multiple states, the resulting list will be grouped by the
    -- state.
    states :: Prelude.Maybe (Prelude.NonEmpty ApplicationState)
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListApplications' 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', 'listApplications_maxResults' - The maximum number of applications that can be listed.
--
-- 'nextToken', 'listApplications_nextToken' - The token for the next set of application results.
--
-- 'states', 'listApplications_states' - An optional filter for application states. Note that if this filter
-- contains multiple states, the resulting list will be grouped by the
-- state.
newListApplications ::
  ListApplications
newListApplications =
  ListApplications'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      states = Prelude.Nothing
    }

-- | The maximum number of applications that can be listed.
listApplications_maxResults :: Lens.Lens' ListApplications (Prelude.Maybe Prelude.Natural)
listApplications_maxResults = Lens.lens (\ListApplications' {maxResults} -> maxResults) (\s@ListApplications' {} a -> s {maxResults = a} :: ListApplications)

-- | The token for the next set of application results.
listApplications_nextToken :: Lens.Lens' ListApplications (Prelude.Maybe Prelude.Text)
listApplications_nextToken = Lens.lens (\ListApplications' {nextToken} -> nextToken) (\s@ListApplications' {} a -> s {nextToken = a} :: ListApplications)

-- | An optional filter for application states. Note that if this filter
-- contains multiple states, the resulting list will be grouped by the
-- state.
listApplications_states :: Lens.Lens' ListApplications (Prelude.Maybe (Prelude.NonEmpty ApplicationState))
listApplications_states = Lens.lens (\ListApplications' {states} -> states) (\s@ListApplications' {} a -> s {states = a} :: ListApplications) Prelude.. Lens.mapping Lens.coerced

instance Core.AWSPager ListApplications where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listApplicationsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        (rs Lens.^. listApplicationsResponse_applications) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listApplications_nextToken
          Lens..~ rs
          Lens.^? listApplicationsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

instance Data.ToPath ListApplications where
  toPath = Prelude.const "/applications"

instance Data.ToQuery ListApplications where
  toQuery ListApplications' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken,
        "states"
          Data.=: Data.toQuery
            (Data.toQueryList "member" Prelude.<$> states)
      ]

-- | /See:/ 'newListApplicationsResponse' smart constructor.
data ListApplicationsResponse = ListApplicationsResponse'
  { -- | The output displays the token for the next set of application results.
    -- This is required for pagination and is available as a response of the
    -- previous request.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | The output lists the specified applications.
    applications :: [ApplicationSummary]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListApplicationsResponse' 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', 'listApplicationsResponse_nextToken' - The output displays the token for the next set of application results.
-- This is required for pagination and is available as a response of the
-- previous request.
--
-- 'httpStatus', 'listApplicationsResponse_httpStatus' - The response's http status code.
--
-- 'applications', 'listApplicationsResponse_applications' - The output lists the specified applications.
newListApplicationsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListApplicationsResponse
newListApplicationsResponse pHttpStatus_ =
  ListApplicationsResponse'
    { nextToken =
        Prelude.Nothing,
      httpStatus = pHttpStatus_,
      applications = Prelude.mempty
    }

-- | The output displays the token for the next set of application results.
-- This is required for pagination and is available as a response of the
-- previous request.
listApplicationsResponse_nextToken :: Lens.Lens' ListApplicationsResponse (Prelude.Maybe Prelude.Text)
listApplicationsResponse_nextToken = Lens.lens (\ListApplicationsResponse' {nextToken} -> nextToken) (\s@ListApplicationsResponse' {} a -> s {nextToken = a} :: ListApplicationsResponse)

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

-- | The output lists the specified applications.
listApplicationsResponse_applications :: Lens.Lens' ListApplicationsResponse [ApplicationSummary]
listApplicationsResponse_applications = Lens.lens (\ListApplicationsResponse' {applications} -> applications) (\s@ListApplicationsResponse' {} a -> s {applications = a} :: ListApplicationsResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListApplicationsResponse where
  rnf ListApplicationsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf applications