{-# 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.Athena.ListSessions
-- 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 sessions in a workgroup that are in an active state like
-- @CREATING@, @CREATED@, @IDLE@, or @BUSY@. Newer sessions are listed
-- first; older sessions are listed later.
module Amazonka.Athena.ListSessions
  ( -- * Creating a Request
    ListSessions (..),
    newListSessions,

    -- * Request Lenses
    listSessions_maxResults,
    listSessions_nextToken,
    listSessions_stateFilter,
    listSessions_workGroup,

    -- * Destructuring the Response
    ListSessionsResponse (..),
    newListSessionsResponse,

    -- * Response Lenses
    listSessionsResponse_nextToken,
    listSessionsResponse_sessions,
    listSessionsResponse_httpStatus,
  )
where

import Amazonka.Athena.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:/ 'newListSessions' smart constructor.
data ListSessions = ListSessions'
  { -- | The maximum number of sessions to return.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | A token generated by the Athena service that specifies where to continue
    -- pagination if a previous request was truncated. To obtain the next set
    -- of pages, pass in the @NextToken@ from the response object of the
    -- previous page call.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | A filter for a specific session state. A description of each state
    -- follows.
    --
    -- @CREATING@ - The session is being started, including acquiring
    -- resources.
    --
    -- @CREATED@ - The session has been started.
    --
    -- @IDLE@ - The session is able to accept a calculation.
    --
    -- @BUSY@ - The session is processing another task and is unable to accept
    -- a calculation.
    --
    -- @TERMINATING@ - The session is in the process of shutting down.
    --
    -- @TERMINATED@ - The session and its resources are no longer running.
    --
    -- @DEGRADED@ - The session has no healthy coordinators.
    --
    -- @FAILED@ - Due to a failure, the session and its resources are no longer
    -- running.
    stateFilter :: Prelude.Maybe SessionState,
    -- | The workgroup to which the session belongs.
    workGroup :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListSessions' 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', 'listSessions_maxResults' - The maximum number of sessions to return.
--
-- 'nextToken', 'listSessions_nextToken' - A token generated by the Athena service that specifies where to continue
-- pagination if a previous request was truncated. To obtain the next set
-- of pages, pass in the @NextToken@ from the response object of the
-- previous page call.
--
-- 'stateFilter', 'listSessions_stateFilter' - A filter for a specific session state. A description of each state
-- follows.
--
-- @CREATING@ - The session is being started, including acquiring
-- resources.
--
-- @CREATED@ - The session has been started.
--
-- @IDLE@ - The session is able to accept a calculation.
--
-- @BUSY@ - The session is processing another task and is unable to accept
-- a calculation.
--
-- @TERMINATING@ - The session is in the process of shutting down.
--
-- @TERMINATED@ - The session and its resources are no longer running.
--
-- @DEGRADED@ - The session has no healthy coordinators.
--
-- @FAILED@ - Due to a failure, the session and its resources are no longer
-- running.
--
-- 'workGroup', 'listSessions_workGroup' - The workgroup to which the session belongs.
newListSessions ::
  -- | 'workGroup'
  Prelude.Text ->
  ListSessions
newListSessions pWorkGroup_ =
  ListSessions'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      stateFilter = Prelude.Nothing,
      workGroup = pWorkGroup_
    }

-- | The maximum number of sessions to return.
listSessions_maxResults :: Lens.Lens' ListSessions (Prelude.Maybe Prelude.Natural)
listSessions_maxResults = Lens.lens (\ListSessions' {maxResults} -> maxResults) (\s@ListSessions' {} a -> s {maxResults = a} :: ListSessions)

-- | A token generated by the Athena service that specifies where to continue
-- pagination if a previous request was truncated. To obtain the next set
-- of pages, pass in the @NextToken@ from the response object of the
-- previous page call.
listSessions_nextToken :: Lens.Lens' ListSessions (Prelude.Maybe Prelude.Text)
listSessions_nextToken = Lens.lens (\ListSessions' {nextToken} -> nextToken) (\s@ListSessions' {} a -> s {nextToken = a} :: ListSessions)

-- | A filter for a specific session state. A description of each state
-- follows.
--
-- @CREATING@ - The session is being started, including acquiring
-- resources.
--
-- @CREATED@ - The session has been started.
--
-- @IDLE@ - The session is able to accept a calculation.
--
-- @BUSY@ - The session is processing another task and is unable to accept
-- a calculation.
--
-- @TERMINATING@ - The session is in the process of shutting down.
--
-- @TERMINATED@ - The session and its resources are no longer running.
--
-- @DEGRADED@ - The session has no healthy coordinators.
--
-- @FAILED@ - Due to a failure, the session and its resources are no longer
-- running.
listSessions_stateFilter :: Lens.Lens' ListSessions (Prelude.Maybe SessionState)
listSessions_stateFilter = Lens.lens (\ListSessions' {stateFilter} -> stateFilter) (\s@ListSessions' {} a -> s {stateFilter = a} :: ListSessions)

-- | The workgroup to which the session belongs.
listSessions_workGroup :: Lens.Lens' ListSessions Prelude.Text
listSessions_workGroup = Lens.lens (\ListSessions' {workGroup} -> workGroup) (\s@ListSessions' {} a -> s {workGroup = a} :: ListSessions)

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

instance Prelude.Hashable ListSessions where
  hashWithSalt _salt ListSessions' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` stateFilter
      `Prelude.hashWithSalt` workGroup

instance Prelude.NFData ListSessions where
  rnf ListSessions' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf stateFilter
      `Prelude.seq` Prelude.rnf workGroup

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

instance Data.ToJSON ListSessions where
  toJSON ListSessions' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            ("StateFilter" Data..=) Prelude.<$> stateFilter,
            Prelude.Just ("WorkGroup" Data..= workGroup)
          ]
      )

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

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

-- | /See:/ 'newListSessionsResponse' smart constructor.
data ListSessionsResponse = ListSessionsResponse'
  { -- | A token generated by the Athena service that specifies where to continue
    -- pagination if a previous request was truncated. To obtain the next set
    -- of pages, pass in the @NextToken@ from the response object of the
    -- previous page call.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | A list of sessions.
    sessions :: Prelude.Maybe [SessionSummary],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListSessionsResponse' 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', 'listSessionsResponse_nextToken' - A token generated by the Athena service that specifies where to continue
-- pagination if a previous request was truncated. To obtain the next set
-- of pages, pass in the @NextToken@ from the response object of the
-- previous page call.
--
-- 'sessions', 'listSessionsResponse_sessions' - A list of sessions.
--
-- 'httpStatus', 'listSessionsResponse_httpStatus' - The response's http status code.
newListSessionsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListSessionsResponse
newListSessionsResponse pHttpStatus_ =
  ListSessionsResponse'
    { nextToken = Prelude.Nothing,
      sessions = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A token generated by the Athena service that specifies where to continue
-- pagination if a previous request was truncated. To obtain the next set
-- of pages, pass in the @NextToken@ from the response object of the
-- previous page call.
listSessionsResponse_nextToken :: Lens.Lens' ListSessionsResponse (Prelude.Maybe Prelude.Text)
listSessionsResponse_nextToken = Lens.lens (\ListSessionsResponse' {nextToken} -> nextToken) (\s@ListSessionsResponse' {} a -> s {nextToken = a} :: ListSessionsResponse)

-- | A list of sessions.
listSessionsResponse_sessions :: Lens.Lens' ListSessionsResponse (Prelude.Maybe [SessionSummary])
listSessionsResponse_sessions = Lens.lens (\ListSessionsResponse' {sessions} -> sessions) (\s@ListSessionsResponse' {} a -> s {sessions = a} :: ListSessionsResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListSessionsResponse where
  rnf ListSessionsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf sessions
      `Prelude.seq` Prelude.rnf httpStatus