{-# 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.SWF.GetWorkflowExecutionHistory
-- 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 the history of the specified workflow execution. The results may
-- be split into multiple pages. To retrieve subsequent pages, make the
-- call again using the @nextPageToken@ returned by the initial call.
--
-- This operation is eventually consistent. The results are best effort and
-- may not exactly reflect recent updates and changes.
--
-- __Access Control__
--
-- You can use IAM policies to control this action\'s access to Amazon SWF
-- resources as follows:
--
-- -   Use a @Resource@ element with the domain name to limit the action to
--     only specified domains.
--
-- -   Use an @Action@ element to allow or deny permission to call this
--     action.
--
-- -   You cannot use an IAM policy to constrain this action\'s parameters.
--
-- If the caller doesn\'t have sufficient permissions to invoke the action,
-- or the parameter values fall outside the specified constraints, the
-- action fails. The associated event attribute\'s @cause@ parameter is set
-- to @OPERATION_NOT_PERMITTED@. For details and example IAM policies, see
-- <https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html Using IAM to Manage Access to Amazon SWF Workflows>
-- in the /Amazon SWF Developer Guide/.
--
-- This operation returns paginated results.
module Amazonka.SWF.GetWorkflowExecutionHistory
  ( -- * Creating a Request
    GetWorkflowExecutionHistory (..),
    newGetWorkflowExecutionHistory,

    -- * Request Lenses
    getWorkflowExecutionHistory_maximumPageSize,
    getWorkflowExecutionHistory_nextPageToken,
    getWorkflowExecutionHistory_reverseOrder,
    getWorkflowExecutionHistory_domain,
    getWorkflowExecutionHistory_execution,

    -- * Destructuring the Response
    GetWorkflowExecutionHistoryResponse (..),
    newGetWorkflowExecutionHistoryResponse,

    -- * Response Lenses
    getWorkflowExecutionHistoryResponse_nextPageToken,
    getWorkflowExecutionHistoryResponse_httpStatus,
    getWorkflowExecutionHistoryResponse_events,
  )
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.SWF.Types

-- | /See:/ 'newGetWorkflowExecutionHistory' smart constructor.
data GetWorkflowExecutionHistory = GetWorkflowExecutionHistory'
  { -- | The maximum number of results that are returned per call. Use
    -- @nextPageToken@ to obtain further pages of results.
    maximumPageSize :: Prelude.Maybe Prelude.Natural,
    -- | If @NextPageToken@ is returned there are more results available. The
    -- value of @NextPageToken@ is a unique pagination token for each page.
    -- Make the call again using the returned token to retrieve the next page.
    -- Keep all other arguments unchanged. Each pagination token expires after
    -- 60 seconds. Using an expired pagination token will return a @400@ error:
    -- \"@Specified token has exceeded its maximum lifetime@\".
    --
    -- The configured @maximumPageSize@ determines how many results can be
    -- returned in a single call.
    nextPageToken :: Prelude.Maybe Prelude.Text,
    -- | When set to @true@, returns the events in reverse order. By default the
    -- results are returned in ascending order of the @eventTimeStamp@ of the
    -- events.
    reverseOrder :: Prelude.Maybe Prelude.Bool,
    -- | The name of the domain containing the workflow execution.
    domain :: Prelude.Text,
    -- | Specifies the workflow execution for which to return the history.
    execution :: WorkflowExecution
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetWorkflowExecutionHistory' 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:
--
-- 'maximumPageSize', 'getWorkflowExecutionHistory_maximumPageSize' - The maximum number of results that are returned per call. Use
-- @nextPageToken@ to obtain further pages of results.
--
-- 'nextPageToken', 'getWorkflowExecutionHistory_nextPageToken' - If @NextPageToken@ is returned there are more results available. The
-- value of @NextPageToken@ is a unique pagination token for each page.
-- Make the call again using the returned token to retrieve the next page.
-- Keep all other arguments unchanged. Each pagination token expires after
-- 60 seconds. Using an expired pagination token will return a @400@ error:
-- \"@Specified token has exceeded its maximum lifetime@\".
--
-- The configured @maximumPageSize@ determines how many results can be
-- returned in a single call.
--
-- 'reverseOrder', 'getWorkflowExecutionHistory_reverseOrder' - When set to @true@, returns the events in reverse order. By default the
-- results are returned in ascending order of the @eventTimeStamp@ of the
-- events.
--
-- 'domain', 'getWorkflowExecutionHistory_domain' - The name of the domain containing the workflow execution.
--
-- 'execution', 'getWorkflowExecutionHistory_execution' - Specifies the workflow execution for which to return the history.
newGetWorkflowExecutionHistory ::
  -- | 'domain'
  Prelude.Text ->
  -- | 'execution'
  WorkflowExecution ->
  GetWorkflowExecutionHistory
newGetWorkflowExecutionHistory pDomain_ pExecution_ =
  GetWorkflowExecutionHistory'
    { maximumPageSize =
        Prelude.Nothing,
      nextPageToken = Prelude.Nothing,
      reverseOrder = Prelude.Nothing,
      domain = pDomain_,
      execution = pExecution_
    }

-- | The maximum number of results that are returned per call. Use
-- @nextPageToken@ to obtain further pages of results.
getWorkflowExecutionHistory_maximumPageSize :: Lens.Lens' GetWorkflowExecutionHistory (Prelude.Maybe Prelude.Natural)
getWorkflowExecutionHistory_maximumPageSize = Lens.lens (\GetWorkflowExecutionHistory' {maximumPageSize} -> maximumPageSize) (\s@GetWorkflowExecutionHistory' {} a -> s {maximumPageSize = a} :: GetWorkflowExecutionHistory)

-- | If @NextPageToken@ is returned there are more results available. The
-- value of @NextPageToken@ is a unique pagination token for each page.
-- Make the call again using the returned token to retrieve the next page.
-- Keep all other arguments unchanged. Each pagination token expires after
-- 60 seconds. Using an expired pagination token will return a @400@ error:
-- \"@Specified token has exceeded its maximum lifetime@\".
--
-- The configured @maximumPageSize@ determines how many results can be
-- returned in a single call.
getWorkflowExecutionHistory_nextPageToken :: Lens.Lens' GetWorkflowExecutionHistory (Prelude.Maybe Prelude.Text)
getWorkflowExecutionHistory_nextPageToken = Lens.lens (\GetWorkflowExecutionHistory' {nextPageToken} -> nextPageToken) (\s@GetWorkflowExecutionHistory' {} a -> s {nextPageToken = a} :: GetWorkflowExecutionHistory)

-- | When set to @true@, returns the events in reverse order. By default the
-- results are returned in ascending order of the @eventTimeStamp@ of the
-- events.
getWorkflowExecutionHistory_reverseOrder :: Lens.Lens' GetWorkflowExecutionHistory (Prelude.Maybe Prelude.Bool)
getWorkflowExecutionHistory_reverseOrder = Lens.lens (\GetWorkflowExecutionHistory' {reverseOrder} -> reverseOrder) (\s@GetWorkflowExecutionHistory' {} a -> s {reverseOrder = a} :: GetWorkflowExecutionHistory)

-- | The name of the domain containing the workflow execution.
getWorkflowExecutionHistory_domain :: Lens.Lens' GetWorkflowExecutionHistory Prelude.Text
getWorkflowExecutionHistory_domain = Lens.lens (\GetWorkflowExecutionHistory' {domain} -> domain) (\s@GetWorkflowExecutionHistory' {} a -> s {domain = a} :: GetWorkflowExecutionHistory)

-- | Specifies the workflow execution for which to return the history.
getWorkflowExecutionHistory_execution :: Lens.Lens' GetWorkflowExecutionHistory WorkflowExecution
getWorkflowExecutionHistory_execution = Lens.lens (\GetWorkflowExecutionHistory' {execution} -> execution) (\s@GetWorkflowExecutionHistory' {} a -> s {execution = a} :: GetWorkflowExecutionHistory)

instance Core.AWSPager GetWorkflowExecutionHistory where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? getWorkflowExecutionHistoryResponse_nextPageToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^. getWorkflowExecutionHistoryResponse_events
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& getWorkflowExecutionHistory_nextPageToken
          Lens..~ rs
          Lens.^? getWorkflowExecutionHistoryResponse_nextPageToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable GetWorkflowExecutionHistory where
  hashWithSalt _salt GetWorkflowExecutionHistory' {..} =
    _salt
      `Prelude.hashWithSalt` maximumPageSize
      `Prelude.hashWithSalt` nextPageToken
      `Prelude.hashWithSalt` reverseOrder
      `Prelude.hashWithSalt` domain
      `Prelude.hashWithSalt` execution

instance Prelude.NFData GetWorkflowExecutionHistory where
  rnf GetWorkflowExecutionHistory' {..} =
    Prelude.rnf maximumPageSize
      `Prelude.seq` Prelude.rnf nextPageToken
      `Prelude.seq` Prelude.rnf reverseOrder
      `Prelude.seq` Prelude.rnf domain
      `Prelude.seq` Prelude.rnf execution

instance Data.ToHeaders GetWorkflowExecutionHistory where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "SimpleWorkflowService.GetWorkflowExecutionHistory" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.0" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON GetWorkflowExecutionHistory where
  toJSON GetWorkflowExecutionHistory' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("maximumPageSize" Data..=)
              Prelude.<$> maximumPageSize,
            ("nextPageToken" Data..=) Prelude.<$> nextPageToken,
            ("reverseOrder" Data..=) Prelude.<$> reverseOrder,
            Prelude.Just ("domain" Data..= domain),
            Prelude.Just ("execution" Data..= execution)
          ]
      )

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

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

-- | Paginated representation of a workflow history for a workflow execution.
-- This is the up to date, complete and authoritative record of the events
-- related to all tasks and events in the life of the workflow execution.
--
-- /See:/ 'newGetWorkflowExecutionHistoryResponse' smart constructor.
data GetWorkflowExecutionHistoryResponse = GetWorkflowExecutionHistoryResponse'
  { -- | If a @NextPageToken@ was returned by a previous call, there are more
    -- results available. To retrieve the next page of results, make the call
    -- again using the returned token in @nextPageToken@. Keep all other
    -- arguments unchanged.
    --
    -- The configured @maximumPageSize@ determines how many results can be
    -- returned in a single call.
    nextPageToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | The list of history events.
    events :: [HistoryEvent]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetWorkflowExecutionHistoryResponse' 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:
--
-- 'nextPageToken', 'getWorkflowExecutionHistoryResponse_nextPageToken' - If a @NextPageToken@ was returned by a previous call, there are more
-- results available. To retrieve the next page of results, make the call
-- again using the returned token in @nextPageToken@. Keep all other
-- arguments unchanged.
--
-- The configured @maximumPageSize@ determines how many results can be
-- returned in a single call.
--
-- 'httpStatus', 'getWorkflowExecutionHistoryResponse_httpStatus' - The response's http status code.
--
-- 'events', 'getWorkflowExecutionHistoryResponse_events' - The list of history events.
newGetWorkflowExecutionHistoryResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  GetWorkflowExecutionHistoryResponse
newGetWorkflowExecutionHistoryResponse pHttpStatus_ =
  GetWorkflowExecutionHistoryResponse'
    { nextPageToken =
        Prelude.Nothing,
      httpStatus = pHttpStatus_,
      events = Prelude.mempty
    }

-- | If a @NextPageToken@ was returned by a previous call, there are more
-- results available. To retrieve the next page of results, make the call
-- again using the returned token in @nextPageToken@. Keep all other
-- arguments unchanged.
--
-- The configured @maximumPageSize@ determines how many results can be
-- returned in a single call.
getWorkflowExecutionHistoryResponse_nextPageToken :: Lens.Lens' GetWorkflowExecutionHistoryResponse (Prelude.Maybe Prelude.Text)
getWorkflowExecutionHistoryResponse_nextPageToken = Lens.lens (\GetWorkflowExecutionHistoryResponse' {nextPageToken} -> nextPageToken) (\s@GetWorkflowExecutionHistoryResponse' {} a -> s {nextPageToken = a} :: GetWorkflowExecutionHistoryResponse)

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

-- | The list of history events.
getWorkflowExecutionHistoryResponse_events :: Lens.Lens' GetWorkflowExecutionHistoryResponse [HistoryEvent]
getWorkflowExecutionHistoryResponse_events = Lens.lens (\GetWorkflowExecutionHistoryResponse' {events} -> events) (\s@GetWorkflowExecutionHistoryResponse' {} a -> s {events = a} :: GetWorkflowExecutionHistoryResponse) Prelude.. Lens.coerced

instance
  Prelude.NFData
    GetWorkflowExecutionHistoryResponse
  where
  rnf GetWorkflowExecutionHistoryResponse' {..} =
    Prelude.rnf nextPageToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf events