{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-binds   #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Network.AWS.EC2.DescribeScheduledInstances
-- Copyright   : (c) 2013-2016 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Describes one or more of your Scheduled Instances.
module Network.AWS.EC2.DescribeScheduledInstances
    (
    -- * Creating a Request
      describeScheduledInstances
    , DescribeScheduledInstances
    -- * Request Lenses
    , dsiFilters
    , dsiSlotStartTimeRange
    , dsiNextToken
    , dsiScheduledInstanceIds
    , dsiDryRun
    , dsiMaxResults

    -- * Destructuring the Response
    , describeScheduledInstancesResponse
    , DescribeScheduledInstancesResponse
    -- * Response Lenses
    , dsirsNextToken
    , dsirsScheduledInstanceSet
    , dsirsResponseStatus
    ) where

import           Network.AWS.EC2.Types
import           Network.AWS.EC2.Types.Product
import           Network.AWS.Lens
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | Contains the parameters for DescribeScheduledInstances.
--
-- /See:/ 'describeScheduledInstances' smart constructor.
data DescribeScheduledInstances = DescribeScheduledInstances'
    { _dsiFilters              :: !(Maybe [Filter])
    , _dsiSlotStartTimeRange   :: !(Maybe SlotStartTimeRangeRequest)
    , _dsiNextToken            :: !(Maybe Text)
    , _dsiScheduledInstanceIds :: !(Maybe [Text])
    , _dsiDryRun               :: !(Maybe Bool)
    , _dsiMaxResults           :: !(Maybe Int)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeScheduledInstances' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dsiFilters'
--
-- * 'dsiSlotStartTimeRange'
--
-- * 'dsiNextToken'
--
-- * 'dsiScheduledInstanceIds'
--
-- * 'dsiDryRun'
--
-- * 'dsiMaxResults'
describeScheduledInstances
    :: DescribeScheduledInstances
describeScheduledInstances =
    DescribeScheduledInstances'
    { _dsiFilters = Nothing
    , _dsiSlotStartTimeRange = Nothing
    , _dsiNextToken = Nothing
    , _dsiScheduledInstanceIds = Nothing
    , _dsiDryRun = Nothing
    , _dsiMaxResults = Nothing
    }

-- | One or more 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').
--
dsiFilters :: Lens' DescribeScheduledInstances [Filter]
dsiFilters = lens _dsiFilters (\ s a -> s{_dsiFilters = a}) . _Default . _Coerce;

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

-- | The token for the next set of results.
dsiNextToken :: Lens' DescribeScheduledInstances (Maybe Text)
dsiNextToken = lens _dsiNextToken (\ s a -> s{_dsiNextToken = a});

-- | One or more Scheduled Instance IDs.
dsiScheduledInstanceIds :: Lens' DescribeScheduledInstances [Text]
dsiScheduledInstanceIds = lens _dsiScheduledInstanceIds (\ s a -> s{_dsiScheduledInstanceIds = a}) . _Default . _Coerce;

-- | 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'.
dsiDryRun :: Lens' DescribeScheduledInstances (Maybe Bool)
dsiDryRun = lens _dsiDryRun (\ s a -> s{_dsiDryRun = a});

-- | 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.
dsiMaxResults :: Lens' DescribeScheduledInstances (Maybe Int)
dsiMaxResults = lens _dsiMaxResults (\ s a -> s{_dsiMaxResults = a});

instance AWSRequest DescribeScheduledInstances where
        type Rs DescribeScheduledInstances =
             DescribeScheduledInstancesResponse
        request = postQuery ec2
        response
          = receiveXML
              (\ s h x ->
                 DescribeScheduledInstancesResponse' <$>
                   (x .@? "nextToken") <*>
                     (x .@? "scheduledInstanceSet" .!@ mempty >>=
                        may (parseXMLList "item"))
                     <*> (pure (fromEnum s)))

instance Hashable DescribeScheduledInstances

instance NFData DescribeScheduledInstances

instance ToHeaders DescribeScheduledInstances where
        toHeaders = const mempty

instance ToPath DescribeScheduledInstances where
        toPath = const "/"

instance ToQuery DescribeScheduledInstances where
        toQuery DescribeScheduledInstances'{..}
          = mconcat
              ["Action" =:
                 ("DescribeScheduledInstances" :: ByteString),
               "Version" =: ("2016-04-01" :: ByteString),
               toQuery (toQueryList "Filter" <$> _dsiFilters),
               "SlotStartTimeRange" =: _dsiSlotStartTimeRange,
               "NextToken" =: _dsiNextToken,
               toQuery
                 (toQueryList "ScheduledInstanceId" <$>
                    _dsiScheduledInstanceIds),
               "DryRun" =: _dsiDryRun,
               "MaxResults" =: _dsiMaxResults]

-- | Contains the output of DescribeScheduledInstances.
--
-- /See:/ 'describeScheduledInstancesResponse' smart constructor.
data DescribeScheduledInstancesResponse = DescribeScheduledInstancesResponse'
    { _dsirsNextToken            :: !(Maybe Text)
    , _dsirsScheduledInstanceSet :: !(Maybe [ScheduledInstance])
    , _dsirsResponseStatus       :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeScheduledInstancesResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dsirsNextToken'
--
-- * 'dsirsScheduledInstanceSet'
--
-- * 'dsirsResponseStatus'
describeScheduledInstancesResponse
    :: Int -- ^ 'dsirsResponseStatus'
    -> DescribeScheduledInstancesResponse
describeScheduledInstancesResponse pResponseStatus_ =
    DescribeScheduledInstancesResponse'
    { _dsirsNextToken = Nothing
    , _dsirsScheduledInstanceSet = Nothing
    , _dsirsResponseStatus = pResponseStatus_
    }

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

-- | Information about the Scheduled Instances.
dsirsScheduledInstanceSet :: Lens' DescribeScheduledInstancesResponse [ScheduledInstance]
dsirsScheduledInstanceSet = lens _dsirsScheduledInstanceSet (\ s a -> s{_dsirsScheduledInstanceSet = a}) . _Default . _Coerce;

-- | The response status code.
dsirsResponseStatus :: Lens' DescribeScheduledInstancesResponse Int
dsirsResponseStatus = lens _dsirsResponseStatus (\ s a -> s{_dsirsResponseStatus = a});

instance NFData DescribeScheduledInstancesResponse