{-# 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.EC2.DescribeScheduledInstances
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Describes the specified Scheduled Instances or all your Scheduled
-- Instances.
--
-- This operation returns paginated results.
module Amazonka.EC2.DescribeScheduledInstances
  ( -- * Creating a Request
    DescribeScheduledInstances (..),
    newDescribeScheduledInstances,

    -- * Request Lenses
    describeScheduledInstances_dryRun,
    describeScheduledInstances_filters,
    describeScheduledInstances_maxResults,
    describeScheduledInstances_nextToken,
    describeScheduledInstances_scheduledInstanceIds,
    describeScheduledInstances_slotStartTimeRange,

    -- * Destructuring the Response
    DescribeScheduledInstancesResponse (..),
    newDescribeScheduledInstancesResponse,

    -- * Response Lenses
    describeScheduledInstancesResponse_nextToken,
    describeScheduledInstancesResponse_scheduledInstanceSet,
    describeScheduledInstancesResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.EC2.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | Contains the parameters for DescribeScheduledInstances.
--
-- /See:/ 'newDescribeScheduledInstances' smart constructor.
data DescribeScheduledInstances = DescribeScheduledInstances'
  { -- | Checks whether you have the required permissions for the action, without
    -- actually making the request, and provides an error response. If you have
    -- the required permissions, the error response is @DryRunOperation@.
    -- Otherwise, it is @UnauthorizedOperation@.
    dryRun :: Prelude.Maybe Prelude.Bool,
    -- | The filters.
    --
    -- -   @availability-zone@ - The Availability Zone (for example,
    --     @us-west-2a@).
    --
    -- -   @instance-type@ - The instance type (for example, @c4.large@).
    --
    -- -   @network-platform@ - The network platform (@EC2-Classic@ or
    --     @EC2-VPC@).
    --
    -- -   @platform@ - The platform (@Linux\/UNIX@ or @Windows@).
    filters :: Prelude.Maybe [Filter],
    -- | The maximum number of results to return in a single call. This value can
    -- be between 5 and 300. The default value is 100. To retrieve the
    -- remaining results, make another call with the returned @NextToken@
    -- value.
    maxResults :: Prelude.Maybe Prelude.Int,
    -- | The token for the next set of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The Scheduled Instance IDs.
    scheduledInstanceIds :: Prelude.Maybe [Prelude.Text],
    -- | The time period for the first schedule to start.
    slotStartTimeRange :: Prelude.Maybe SlotStartTimeRangeRequest
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeScheduledInstances' 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:
--
-- 'dryRun', 'describeScheduledInstances_dryRun' - Checks whether you have the required permissions for the action, without
-- actually making the request, and provides an error response. If you have
-- the required permissions, the error response is @DryRunOperation@.
-- Otherwise, it is @UnauthorizedOperation@.
--
-- 'filters', 'describeScheduledInstances_filters' - The filters.
--
-- -   @availability-zone@ - The Availability Zone (for example,
--     @us-west-2a@).
--
-- -   @instance-type@ - The instance type (for example, @c4.large@).
--
-- -   @network-platform@ - The network platform (@EC2-Classic@ or
--     @EC2-VPC@).
--
-- -   @platform@ - The platform (@Linux\/UNIX@ or @Windows@).
--
-- 'maxResults', 'describeScheduledInstances_maxResults' - The maximum number of results to return in a single call. This value can
-- be between 5 and 300. The default value is 100. To retrieve the
-- remaining results, make another call with the returned @NextToken@
-- value.
--
-- 'nextToken', 'describeScheduledInstances_nextToken' - The token for the next set of results.
--
-- 'scheduledInstanceIds', 'describeScheduledInstances_scheduledInstanceIds' - The Scheduled Instance IDs.
--
-- 'slotStartTimeRange', 'describeScheduledInstances_slotStartTimeRange' - The time period for the first schedule to start.
newDescribeScheduledInstances ::
  DescribeScheduledInstances
newDescribeScheduledInstances =
  DescribeScheduledInstances'
    { dryRun =
        Prelude.Nothing,
      filters = Prelude.Nothing,
      maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      scheduledInstanceIds = Prelude.Nothing,
      slotStartTimeRange = Prelude.Nothing
    }

-- | Checks whether you have the required permissions for the action, without
-- actually making the request, and provides an error response. If you have
-- the required permissions, the error response is @DryRunOperation@.
-- Otherwise, it is @UnauthorizedOperation@.
describeScheduledInstances_dryRun :: Lens.Lens' DescribeScheduledInstances (Prelude.Maybe Prelude.Bool)
describeScheduledInstances_dryRun = Lens.lens (\DescribeScheduledInstances' {dryRun} -> dryRun) (\s@DescribeScheduledInstances' {} a -> s {dryRun = a} :: DescribeScheduledInstances)

-- | The filters.
--
-- -   @availability-zone@ - The Availability Zone (for example,
--     @us-west-2a@).
--
-- -   @instance-type@ - The instance type (for example, @c4.large@).
--
-- -   @network-platform@ - The network platform (@EC2-Classic@ or
--     @EC2-VPC@).
--
-- -   @platform@ - The platform (@Linux\/UNIX@ or @Windows@).
describeScheduledInstances_filters :: Lens.Lens' DescribeScheduledInstances (Prelude.Maybe [Filter])
describeScheduledInstances_filters = Lens.lens (\DescribeScheduledInstances' {filters} -> filters) (\s@DescribeScheduledInstances' {} a -> s {filters = a} :: DescribeScheduledInstances) Prelude.. Lens.mapping Lens.coerced

-- | The maximum number of results to return in a single call. This value can
-- be between 5 and 300. The default value is 100. To retrieve the
-- remaining results, make another call with the returned @NextToken@
-- value.
describeScheduledInstances_maxResults :: Lens.Lens' DescribeScheduledInstances (Prelude.Maybe Prelude.Int)
describeScheduledInstances_maxResults = Lens.lens (\DescribeScheduledInstances' {maxResults} -> maxResults) (\s@DescribeScheduledInstances' {} a -> s {maxResults = a} :: DescribeScheduledInstances)

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

-- | The Scheduled Instance IDs.
describeScheduledInstances_scheduledInstanceIds :: Lens.Lens' DescribeScheduledInstances (Prelude.Maybe [Prelude.Text])
describeScheduledInstances_scheduledInstanceIds = Lens.lens (\DescribeScheduledInstances' {scheduledInstanceIds} -> scheduledInstanceIds) (\s@DescribeScheduledInstances' {} a -> s {scheduledInstanceIds = a} :: DescribeScheduledInstances) Prelude.. Lens.mapping Lens.coerced

-- | The time period for the first schedule to start.
describeScheduledInstances_slotStartTimeRange :: Lens.Lens' DescribeScheduledInstances (Prelude.Maybe SlotStartTimeRangeRequest)
describeScheduledInstances_slotStartTimeRange = Lens.lens (\DescribeScheduledInstances' {slotStartTimeRange} -> slotStartTimeRange) (\s@DescribeScheduledInstances' {} a -> s {slotStartTimeRange = a} :: DescribeScheduledInstances)

instance Core.AWSPager DescribeScheduledInstances where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeScheduledInstancesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeScheduledInstancesResponse_scheduledInstanceSet
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeScheduledInstances_nextToken
          Lens..~ rs
          Lens.^? describeScheduledInstancesResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest DescribeScheduledInstances where
  type
    AWSResponse DescribeScheduledInstances =
      DescribeScheduledInstancesResponse
  request overrides =
    Request.postQuery (overrides defaultService)
  response =
    Response.receiveXML
      ( \s h x ->
          DescribeScheduledInstancesResponse'
            Prelude.<$> (x Data..@? "nextToken")
            Prelude.<*> ( x
                            Data..@? "scheduledInstanceSet"
                            Core..!@ Prelude.mempty
                            Prelude.>>= Core.may (Data.parseXMLList "item")
                        )
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable DescribeScheduledInstances where
  hashWithSalt _salt DescribeScheduledInstances' {..} =
    _salt
      `Prelude.hashWithSalt` dryRun
      `Prelude.hashWithSalt` filters
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` scheduledInstanceIds
      `Prelude.hashWithSalt` slotStartTimeRange

instance Prelude.NFData DescribeScheduledInstances where
  rnf DescribeScheduledInstances' {..} =
    Prelude.rnf dryRun
      `Prelude.seq` Prelude.rnf filters
      `Prelude.seq` Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf scheduledInstanceIds
      `Prelude.seq` Prelude.rnf slotStartTimeRange

instance Data.ToHeaders DescribeScheduledInstances where
  toHeaders = Prelude.const Prelude.mempty

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

instance Data.ToQuery DescribeScheduledInstances where
  toQuery DescribeScheduledInstances' {..} =
    Prelude.mconcat
      [ "Action"
          Data.=: ("DescribeScheduledInstances" :: Prelude.ByteString),
        "Version"
          Data.=: ("2016-11-15" :: Prelude.ByteString),
        "DryRun" Data.=: dryRun,
        Data.toQuery
          (Data.toQueryList "Filter" Prelude.<$> filters),
        "MaxResults" Data.=: maxResults,
        "NextToken" Data.=: nextToken,
        Data.toQuery
          ( Data.toQueryList "ScheduledInstanceId"
              Prelude.<$> scheduledInstanceIds
          ),
        "SlotStartTimeRange" Data.=: slotStartTimeRange
      ]

-- | Contains the output of DescribeScheduledInstances.
--
-- /See:/ 'newDescribeScheduledInstancesResponse' smart constructor.
data DescribeScheduledInstancesResponse = DescribeScheduledInstancesResponse'
  { -- | The token required to retrieve the next set of results. This value is
    -- @null@ when there are no more results to return.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | Information about the Scheduled Instances.
    scheduledInstanceSet :: Prelude.Maybe [ScheduledInstance],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeScheduledInstancesResponse' 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', 'describeScheduledInstancesResponse_nextToken' - The token required to retrieve the next set of results. This value is
-- @null@ when there are no more results to return.
--
-- 'scheduledInstanceSet', 'describeScheduledInstancesResponse_scheduledInstanceSet' - Information about the Scheduled Instances.
--
-- 'httpStatus', 'describeScheduledInstancesResponse_httpStatus' - The response's http status code.
newDescribeScheduledInstancesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeScheduledInstancesResponse
newDescribeScheduledInstancesResponse pHttpStatus_ =
  DescribeScheduledInstancesResponse'
    { nextToken =
        Prelude.Nothing,
      scheduledInstanceSet = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The token required to retrieve the next set of results. This value is
-- @null@ when there are no more results to return.
describeScheduledInstancesResponse_nextToken :: Lens.Lens' DescribeScheduledInstancesResponse (Prelude.Maybe Prelude.Text)
describeScheduledInstancesResponse_nextToken = Lens.lens (\DescribeScheduledInstancesResponse' {nextToken} -> nextToken) (\s@DescribeScheduledInstancesResponse' {} a -> s {nextToken = a} :: DescribeScheduledInstancesResponse)

-- | Information about the Scheduled Instances.
describeScheduledInstancesResponse_scheduledInstanceSet :: Lens.Lens' DescribeScheduledInstancesResponse (Prelude.Maybe [ScheduledInstance])
describeScheduledInstancesResponse_scheduledInstanceSet = Lens.lens (\DescribeScheduledInstancesResponse' {scheduledInstanceSet} -> scheduledInstanceSet) (\s@DescribeScheduledInstancesResponse' {} a -> s {scheduledInstanceSet = a} :: DescribeScheduledInstancesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance
  Prelude.NFData
    DescribeScheduledInstancesResponse
  where
  rnf DescribeScheduledInstancesResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf scheduledInstanceSet
      `Prelude.seq` Prelude.rnf httpStatus