{-# 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.DescribeReservedInstancesListings
-- Copyright   : (c) 2013-2015 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 your account\'s Reserved Instance listings in the Reserved
-- Instance Marketplace.
--
-- The Reserved Instance Marketplace matches sellers who want to resell
-- Reserved Instance capacity that they no longer need with buyers who want
-- to purchase additional capacity. Reserved Instances bought and sold
-- through the Reserved Instance Marketplace work like any other Reserved
-- Instances.
--
-- As a seller, you choose to list some or all of your Reserved Instances,
-- and you specify the upfront price to receive for them. Your Reserved
-- Instances are then listed in the Reserved Instance Marketplace and are
-- available for purchase.
--
-- As a buyer, you specify the configuration of the Reserved Instance to
-- purchase, and the Marketplace matches what you\'re searching for with
-- what\'s available. The Marketplace first sells the lowest priced
-- Reserved Instances to you, and continues to sell available Reserved
-- Instance listings to you until your demand is met. You are charged based
-- on the total price of all of the listings that you purchase.
--
-- For more information, see
-- <http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ri-market-general.html Reserved Instance Marketplace>
-- in the /Amazon Elastic Compute Cloud User Guide/.
--
-- /See:/ <http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeReservedInstancesListings.html AWS API Reference> for DescribeReservedInstancesListings.
module Network.AWS.EC2.DescribeReservedInstancesListings
    (
    -- * Creating a Request
      describeReservedInstancesListings
    , DescribeReservedInstancesListings
    -- * Request Lenses
    , drilFilters
    , drilReservedInstancesId
    , drilReservedInstancesListingId

    -- * Destructuring the Response
    , describeReservedInstancesListingsResponse
    , DescribeReservedInstancesListingsResponse
    -- * Response Lenses
    , drilrsReservedInstancesListings
    , drilrsStatus
    ) where

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

-- | /See:/ 'describeReservedInstancesListings' smart constructor.
data DescribeReservedInstancesListings = DescribeReservedInstancesListings'
    { _drilFilters                    :: !(Maybe [Filter])
    , _drilReservedInstancesId        :: !(Maybe Text)
    , _drilReservedInstancesListingId :: !(Maybe Text)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeReservedInstancesListings' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drilFilters'
--
-- * 'drilReservedInstancesId'
--
-- * 'drilReservedInstancesListingId'
describeReservedInstancesListings
    :: DescribeReservedInstancesListings
describeReservedInstancesListings =
    DescribeReservedInstancesListings'
    { _drilFilters = Nothing
    , _drilReservedInstancesId = Nothing
    , _drilReservedInstancesListingId = Nothing
    }

-- | One or more filters.
--
-- -   'reserved-instances-id' - The ID of the Reserved Instances.
--
-- -   'reserved-instances-listing-id' - The ID of the Reserved Instances
--     listing.
--
-- -   'status' - The status of the Reserved Instance listing ('pending' |
--     'active' | 'cancelled' | 'closed').
--
-- -   'status-message' - The reason for the status.
--
drilFilters :: Lens' DescribeReservedInstancesListings [Filter]
drilFilters = lens _drilFilters (\ s a -> s{_drilFilters = a}) . _Default . _Coerce;

-- | One or more Reserved Instance IDs.
drilReservedInstancesId :: Lens' DescribeReservedInstancesListings (Maybe Text)
drilReservedInstancesId = lens _drilReservedInstancesId (\ s a -> s{_drilReservedInstancesId = a});

-- | One or more Reserved Instance Listing IDs.
drilReservedInstancesListingId :: Lens' DescribeReservedInstancesListings (Maybe Text)
drilReservedInstancesListingId = lens _drilReservedInstancesListingId (\ s a -> s{_drilReservedInstancesListingId = a});

instance AWSRequest DescribeReservedInstancesListings
         where
        type Sv DescribeReservedInstancesListings = EC2
        type Rs DescribeReservedInstancesListings =
             DescribeReservedInstancesListingsResponse
        request = post
        response
          = receiveXML
              (\ s h x ->
                 DescribeReservedInstancesListingsResponse' <$>
                   (x .@? "reservedInstancesListingsSet" .!@ mempty >>=
                      may (parseXMLList "item"))
                     <*> (pure (fromEnum s)))

instance ToHeaders DescribeReservedInstancesListings
         where
        toHeaders = const mempty

instance ToPath DescribeReservedInstancesListings
         where
        toPath = const "/"

instance ToQuery DescribeReservedInstancesListings
         where
        toQuery DescribeReservedInstancesListings'{..}
          = mconcat
              ["Action" =:
                 ("DescribeReservedInstancesListings" :: ByteString),
               "Version" =: ("2015-04-15" :: ByteString),
               toQuery (toQueryList "Filter" <$> _drilFilters),
               "ReservedInstancesId" =: _drilReservedInstancesId,
               "ReservedInstancesListingId" =:
                 _drilReservedInstancesListingId]

-- | /See:/ 'describeReservedInstancesListingsResponse' smart constructor.
data DescribeReservedInstancesListingsResponse = DescribeReservedInstancesListingsResponse'
    { _drilrsReservedInstancesListings :: !(Maybe [ReservedInstancesListing])
    , _drilrsStatus                    :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeReservedInstancesListingsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drilrsReservedInstancesListings'
--
-- * 'drilrsStatus'
describeReservedInstancesListingsResponse
    :: Int -- ^ 'drilrsStatus'
    -> DescribeReservedInstancesListingsResponse
describeReservedInstancesListingsResponse pStatus_ =
    DescribeReservedInstancesListingsResponse'
    { _drilrsReservedInstancesListings = Nothing
    , _drilrsStatus = pStatus_
    }

-- | Information about the Reserved Instance listing.
drilrsReservedInstancesListings :: Lens' DescribeReservedInstancesListingsResponse [ReservedInstancesListing]
drilrsReservedInstancesListings = lens _drilrsReservedInstancesListings (\ s a -> s{_drilrsReservedInstancesListings = a}) . _Default . _Coerce;

-- | The response status code.
drilrsStatus :: Lens' DescribeReservedInstancesListingsResponse Int
drilrsStatus = lens _drilrsStatus (\ s a -> s{_drilrsStatus = a});