{-# 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.SSM.DescribeSessions
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Retrieves a list of all active sessions (both connected and
-- disconnected) or terminated sessions from the past 30 days.
--
-- This operation returns paginated results.
module Amazonka.SSM.DescribeSessions
  ( -- * Creating a Request
    DescribeSessions (..),
    newDescribeSessions,

    -- * Request Lenses
    describeSessions_filters,
    describeSessions_maxResults,
    describeSessions_nextToken,
    describeSessions_state,

    -- * Destructuring the Response
    DescribeSessionsResponse (..),
    newDescribeSessionsResponse,

    -- * Response Lenses
    describeSessionsResponse_nextToken,
    describeSessionsResponse_sessions,
    describeSessionsResponse_httpStatus,
  )
where

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
import Amazonka.SSM.Types

-- | /See:/ 'newDescribeSessions' smart constructor.
data DescribeSessions = DescribeSessions'
  { -- | One or more filters to limit the type of sessions returned by the
    -- request.
    filters :: Prelude.Maybe (Prelude.NonEmpty SessionFilter),
    -- | 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,
    -- | The token for the next set of items to return. (You received this token
    -- from a previous call.)
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The session status to retrieve a list of sessions for. For example,
    -- \"Active\".
    state :: SessionState
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeSessions' 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:
--
-- 'filters', 'describeSessions_filters' - One or more filters to limit the type of sessions returned by the
-- request.
--
-- 'maxResults', 'describeSessions_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', 'describeSessions_nextToken' - The token for the next set of items to return. (You received this token
-- from a previous call.)
--
-- 'state', 'describeSessions_state' - The session status to retrieve a list of sessions for. For example,
-- \"Active\".
newDescribeSessions ::
  -- | 'state'
  SessionState ->
  DescribeSessions
newDescribeSessions pState_ =
  DescribeSessions'
    { filters = Prelude.Nothing,
      maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      state = pState_
    }

-- | One or more filters to limit the type of sessions returned by the
-- request.
describeSessions_filters :: Lens.Lens' DescribeSessions (Prelude.Maybe (Prelude.NonEmpty SessionFilter))
describeSessions_filters = Lens.lens (\DescribeSessions' {filters} -> filters) (\s@DescribeSessions' {} a -> s {filters = a} :: DescribeSessions) Prelude.. Lens.mapping Lens.coerced

-- | 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.
describeSessions_maxResults :: Lens.Lens' DescribeSessions (Prelude.Maybe Prelude.Natural)
describeSessions_maxResults = Lens.lens (\DescribeSessions' {maxResults} -> maxResults) (\s@DescribeSessions' {} a -> s {maxResults = a} :: DescribeSessions)

-- | The token for the next set of items to return. (You received this token
-- from a previous call.)
describeSessions_nextToken :: Lens.Lens' DescribeSessions (Prelude.Maybe Prelude.Text)
describeSessions_nextToken = Lens.lens (\DescribeSessions' {nextToken} -> nextToken) (\s@DescribeSessions' {} a -> s {nextToken = a} :: DescribeSessions)

-- | The session status to retrieve a list of sessions for. For example,
-- \"Active\".
describeSessions_state :: Lens.Lens' DescribeSessions SessionState
describeSessions_state = Lens.lens (\DescribeSessions' {state} -> state) (\s@DescribeSessions' {} a -> s {state = a} :: DescribeSessions)

instance Core.AWSPager DescribeSessions where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeSessionsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeSessionsResponse_sessions
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeSessions_nextToken
          Lens..~ rs
          Lens.^? describeSessionsResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable DescribeSessions where
  hashWithSalt _salt DescribeSessions' {..} =
    _salt
      `Prelude.hashWithSalt` filters
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` state

instance Prelude.NFData DescribeSessions where
  rnf DescribeSessions' {..} =
    Prelude.rnf filters
      `Prelude.seq` Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf state

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

instance Data.ToJSON DescribeSessions where
  toJSON DescribeSessions' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("Filters" Data..=) Prelude.<$> filters,
            ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            Prelude.Just ("State" Data..= state)
          ]
      )

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

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

-- | /See:/ 'newDescribeSessionsResponse' smart constructor.
data DescribeSessionsResponse = DescribeSessionsResponse'
  { -- | The token for the next set of items to return. (You received this token
    -- from a previous call.)
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | A list of sessions meeting the request parameters.
    sessions :: Prelude.Maybe [Session],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeSessionsResponse' 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', 'describeSessionsResponse_nextToken' - The token for the next set of items to return. (You received this token
-- from a previous call.)
--
-- 'sessions', 'describeSessionsResponse_sessions' - A list of sessions meeting the request parameters.
--
-- 'httpStatus', 'describeSessionsResponse_httpStatus' - The response's http status code.
newDescribeSessionsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeSessionsResponse
newDescribeSessionsResponse pHttpStatus_ =
  DescribeSessionsResponse'
    { nextToken =
        Prelude.Nothing,
      sessions = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The token for the next set of items to return. (You received this token
-- from a previous call.)
describeSessionsResponse_nextToken :: Lens.Lens' DescribeSessionsResponse (Prelude.Maybe Prelude.Text)
describeSessionsResponse_nextToken = Lens.lens (\DescribeSessionsResponse' {nextToken} -> nextToken) (\s@DescribeSessionsResponse' {} a -> s {nextToken = a} :: DescribeSessionsResponse)

-- | A list of sessions meeting the request parameters.
describeSessionsResponse_sessions :: Lens.Lens' DescribeSessionsResponse (Prelude.Maybe [Session])
describeSessionsResponse_sessions = Lens.lens (\DescribeSessionsResponse' {sessions} -> sessions) (\s@DescribeSessionsResponse' {} a -> s {sessions = a} :: DescribeSessionsResponse) Prelude.. Lens.mapping Lens.coerced

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

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