{-# 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.ECS.ListServices
-- 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 a list of services. You can filter the results by cluster,
-- launch type, and scheduling strategy.
--
-- This operation returns paginated results.
module Amazonka.ECS.ListServices
  ( -- * Creating a Request
    ListServices (..),
    newListServices,

    -- * Request Lenses
    listServices_cluster,
    listServices_launchType,
    listServices_maxResults,
    listServices_nextToken,
    listServices_schedulingStrategy,

    -- * Destructuring the Response
    ListServicesResponse (..),
    newListServicesResponse,

    -- * Response Lenses
    listServicesResponse_nextToken,
    listServicesResponse_serviceArns,
    listServicesResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListServices' smart constructor.
data ListServices = ListServices'
  { -- | The short name or full Amazon Resource Name (ARN) of the cluster to use
    -- when filtering the @ListServices@ results. If you do not specify a
    -- cluster, the default cluster is assumed.
    cluster :: Prelude.Maybe Prelude.Text,
    -- | The launch type to use when filtering the @ListServices@ results.
    launchType :: Prelude.Maybe LaunchType,
    -- | The maximum number of service results that @ListServices@ returned in
    -- paginated output. When this parameter is used, @ListServices@ only
    -- returns @maxResults@ results in a single page along with a @nextToken@
    -- response element. The remaining results of the initial request can be
    -- seen by sending another @ListServices@ request with the returned
    -- @nextToken@ value. This value can be between 1 and 100. If this
    -- parameter isn\'t used, then @ListServices@ returns up to 10 results and
    -- a @nextToken@ value if applicable.
    maxResults :: Prelude.Maybe Prelude.Int,
    -- | The @nextToken@ value returned from a @ListServices@ request indicating
    -- that more results are available to fulfill the request and further calls
    -- will be needed. If @maxResults@ was provided, it is possible the number
    -- of results to be fewer than @maxResults@.
    --
    -- This token should be treated as an opaque identifier that is only used
    -- to retrieve the next items in a list and not for other programmatic
    -- purposes.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The scheduling strategy to use when filtering the @ListServices@
    -- results.
    schedulingStrategy :: Prelude.Maybe SchedulingStrategy
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListServices' 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:
--
-- 'cluster', 'listServices_cluster' - The short name or full Amazon Resource Name (ARN) of the cluster to use
-- when filtering the @ListServices@ results. If you do not specify a
-- cluster, the default cluster is assumed.
--
-- 'launchType', 'listServices_launchType' - The launch type to use when filtering the @ListServices@ results.
--
-- 'maxResults', 'listServices_maxResults' - The maximum number of service results that @ListServices@ returned in
-- paginated output. When this parameter is used, @ListServices@ only
-- returns @maxResults@ results in a single page along with a @nextToken@
-- response element. The remaining results of the initial request can be
-- seen by sending another @ListServices@ request with the returned
-- @nextToken@ value. This value can be between 1 and 100. If this
-- parameter isn\'t used, then @ListServices@ returns up to 10 results and
-- a @nextToken@ value if applicable.
--
-- 'nextToken', 'listServices_nextToken' - The @nextToken@ value returned from a @ListServices@ request indicating
-- that more results are available to fulfill the request and further calls
-- will be needed. If @maxResults@ was provided, it is possible the number
-- of results to be fewer than @maxResults@.
--
-- This token should be treated as an opaque identifier that is only used
-- to retrieve the next items in a list and not for other programmatic
-- purposes.
--
-- 'schedulingStrategy', 'listServices_schedulingStrategy' - The scheduling strategy to use when filtering the @ListServices@
-- results.
newListServices ::
  ListServices
newListServices =
  ListServices'
    { cluster = Prelude.Nothing,
      launchType = Prelude.Nothing,
      maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      schedulingStrategy = Prelude.Nothing
    }

-- | The short name or full Amazon Resource Name (ARN) of the cluster to use
-- when filtering the @ListServices@ results. If you do not specify a
-- cluster, the default cluster is assumed.
listServices_cluster :: Lens.Lens' ListServices (Prelude.Maybe Prelude.Text)
listServices_cluster = Lens.lens (\ListServices' {cluster} -> cluster) (\s@ListServices' {} a -> s {cluster = a} :: ListServices)

-- | The launch type to use when filtering the @ListServices@ results.
listServices_launchType :: Lens.Lens' ListServices (Prelude.Maybe LaunchType)
listServices_launchType = Lens.lens (\ListServices' {launchType} -> launchType) (\s@ListServices' {} a -> s {launchType = a} :: ListServices)

-- | The maximum number of service results that @ListServices@ returned in
-- paginated output. When this parameter is used, @ListServices@ only
-- returns @maxResults@ results in a single page along with a @nextToken@
-- response element. The remaining results of the initial request can be
-- seen by sending another @ListServices@ request with the returned
-- @nextToken@ value. This value can be between 1 and 100. If this
-- parameter isn\'t used, then @ListServices@ returns up to 10 results and
-- a @nextToken@ value if applicable.
listServices_maxResults :: Lens.Lens' ListServices (Prelude.Maybe Prelude.Int)
listServices_maxResults = Lens.lens (\ListServices' {maxResults} -> maxResults) (\s@ListServices' {} a -> s {maxResults = a} :: ListServices)

-- | The @nextToken@ value returned from a @ListServices@ request indicating
-- that more results are available to fulfill the request and further calls
-- will be needed. If @maxResults@ was provided, it is possible the number
-- of results to be fewer than @maxResults@.
--
-- This token should be treated as an opaque identifier that is only used
-- to retrieve the next items in a list and not for other programmatic
-- purposes.
listServices_nextToken :: Lens.Lens' ListServices (Prelude.Maybe Prelude.Text)
listServices_nextToken = Lens.lens (\ListServices' {nextToken} -> nextToken) (\s@ListServices' {} a -> s {nextToken = a} :: ListServices)

-- | The scheduling strategy to use when filtering the @ListServices@
-- results.
listServices_schedulingStrategy :: Lens.Lens' ListServices (Prelude.Maybe SchedulingStrategy)
listServices_schedulingStrategy = Lens.lens (\ListServices' {schedulingStrategy} -> schedulingStrategy) (\s@ListServices' {} a -> s {schedulingStrategy = a} :: ListServices)

instance Core.AWSPager ListServices where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listServicesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listServicesResponse_serviceArns
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listServices_nextToken
          Lens..~ rs
          Lens.^? listServicesResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable ListServices where
  hashWithSalt _salt ListServices' {..} =
    _salt
      `Prelude.hashWithSalt` cluster
      `Prelude.hashWithSalt` launchType
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` schedulingStrategy

instance Prelude.NFData ListServices where
  rnf ListServices' {..} =
    Prelude.rnf cluster
      `Prelude.seq` Prelude.rnf launchType
      `Prelude.seq` Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf schedulingStrategy

instance Data.ToHeaders ListServices where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "AmazonEC2ContainerServiceV20141113.ListServices" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON ListServices where
  toJSON ListServices' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("cluster" Data..=) Prelude.<$> cluster,
            ("launchType" Data..=) Prelude.<$> launchType,
            ("maxResults" Data..=) Prelude.<$> maxResults,
            ("nextToken" Data..=) Prelude.<$> nextToken,
            ("schedulingStrategy" Data..=)
              Prelude.<$> schedulingStrategy
          ]
      )

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

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

-- | /See:/ 'newListServicesResponse' smart constructor.
data ListServicesResponse = ListServicesResponse'
  { -- | The @nextToken@ value to include in a future @ListServices@ request.
    -- When the results of a @ListServices@ request exceed @maxResults@, this
    -- value can be used to retrieve the next page of results. This value is
    -- @null@ when there are no more results to return.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The list of full ARN entries for each service that\'s associated with
    -- the specified cluster.
    serviceArns :: 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 'ListServicesResponse' 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', 'listServicesResponse_nextToken' - The @nextToken@ value to include in a future @ListServices@ request.
-- When the results of a @ListServices@ request exceed @maxResults@, this
-- value can be used to retrieve the next page of results. This value is
-- @null@ when there are no more results to return.
--
-- 'serviceArns', 'listServicesResponse_serviceArns' - The list of full ARN entries for each service that\'s associated with
-- the specified cluster.
--
-- 'httpStatus', 'listServicesResponse_httpStatus' - The response's http status code.
newListServicesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListServicesResponse
newListServicesResponse pHttpStatus_ =
  ListServicesResponse'
    { nextToken = Prelude.Nothing,
      serviceArns = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The @nextToken@ value to include in a future @ListServices@ request.
-- When the results of a @ListServices@ request exceed @maxResults@, this
-- value can be used to retrieve the next page of results. This value is
-- @null@ when there are no more results to return.
listServicesResponse_nextToken :: Lens.Lens' ListServicesResponse (Prelude.Maybe Prelude.Text)
listServicesResponse_nextToken = Lens.lens (\ListServicesResponse' {nextToken} -> nextToken) (\s@ListServicesResponse' {} a -> s {nextToken = a} :: ListServicesResponse)

-- | The list of full ARN entries for each service that\'s associated with
-- the specified cluster.
listServicesResponse_serviceArns :: Lens.Lens' ListServicesResponse (Prelude.Maybe [Prelude.Text])
listServicesResponse_serviceArns = Lens.lens (\ListServicesResponse' {serviceArns} -> serviceArns) (\s@ListServicesResponse' {} a -> s {serviceArns = a} :: ListServicesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListServicesResponse where
  rnf ListServicesResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf serviceArns
      `Prelude.seq` Prelude.rnf httpStatus