{-# 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.DescribeVPCs
-- 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 VPCs.
module Network.AWS.EC2.DescribeVPCs
    (
    -- * Creating a Request
      describeVPCs
    , DescribeVPCs
    -- * Request Lenses
    , dvsFilters
    , dvsVPCIds
    , dvsDryRun

    -- * Destructuring the Response
    , describeVPCsResponse
    , DescribeVPCsResponse
    -- * Response Lenses
    , dvrsVPCs
    , dvrsResponseStatus
    ) 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 DescribeVpcs.
--
-- /See:/ 'describeVPCs' smart constructor.
data DescribeVPCs = DescribeVPCs'
    { _dvsFilters :: !(Maybe [Filter])
    , _dvsVPCIds  :: !(Maybe [Text])
    , _dvsDryRun  :: !(Maybe Bool)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeVPCs' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dvsFilters'
--
-- * 'dvsVPCIds'
--
-- * 'dvsDryRun'
describeVPCs
    :: DescribeVPCs
describeVPCs =
    DescribeVPCs'
    { _dvsFilters = Nothing
    , _dvsVPCIds = Nothing
    , _dvsDryRun = Nothing
    }

-- | One or more filters.
--
-- -   'cidr' - The CIDR block of the VPC. The CIDR block you specify must exactly match the VPC\'s CIDR block for information to be returned for the VPC. Must contain the slash followed by one or two digits (for example, '\/28').
--
-- -   'dhcp-options-id' - The ID of a set of DHCP options.
--
-- -   'isDefault' - Indicates whether the VPC is the default VPC.
--
-- -   'state' - The state of the VPC ('pending' | 'available').
--
-- -   'tag':/key/=/value/ - The key\/value combination of a tag assigned to the resource.
--
-- -   'tag-key' - The key of a tag assigned to the resource. This filter is independent of the 'tag-value' filter. For example, if you use both the filter \"tag-key=Purpose\" and the filter \"tag-value=X\", you get any resources assigned both the tag key Purpose (regardless of what the tag\'s value is), and the tag value X (regardless of what the tag\'s key is). If you want to list only resources where Purpose is X, see the 'tag':/key/=/value/ filter.
--
-- -   'tag-value' - The value of a tag assigned to the resource. This filter is independent of the 'tag-key' filter.
--
-- -   'vpc-id' - The ID of the VPC.
--
dvsFilters :: Lens' DescribeVPCs [Filter]
dvsFilters = lens _dvsFilters (\ s a -> s{_dvsFilters = a}) . _Default . _Coerce;

-- | One or more VPC IDs.
--
-- Default: Describes all your VPCs.
dvsVPCIds :: Lens' DescribeVPCs [Text]
dvsVPCIds = lens _dvsVPCIds (\ s a -> s{_dvsVPCIds = 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'.
dvsDryRun :: Lens' DescribeVPCs (Maybe Bool)
dvsDryRun = lens _dvsDryRun (\ s a -> s{_dvsDryRun = a});

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

instance Hashable DescribeVPCs

instance NFData DescribeVPCs

instance ToHeaders DescribeVPCs where
        toHeaders = const mempty

instance ToPath DescribeVPCs where
        toPath = const "/"

instance ToQuery DescribeVPCs where
        toQuery DescribeVPCs'{..}
          = mconcat
              ["Action" =: ("DescribeVpcs" :: ByteString),
               "Version" =: ("2016-04-01" :: ByteString),
               toQuery (toQueryList "Filter" <$> _dvsFilters),
               toQuery (toQueryList "VpcId" <$> _dvsVPCIds),
               "DryRun" =: _dvsDryRun]

-- | Contains the output of DescribeVpcs.
--
-- /See:/ 'describeVPCsResponse' smart constructor.
data DescribeVPCsResponse = DescribeVPCsResponse'
    { _dvrsVPCs           :: !(Maybe [VPC])
    , _dvrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeVPCsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dvrsVPCs'
--
-- * 'dvrsResponseStatus'
describeVPCsResponse
    :: Int -- ^ 'dvrsResponseStatus'
    -> DescribeVPCsResponse
describeVPCsResponse pResponseStatus_ =
    DescribeVPCsResponse'
    { _dvrsVPCs = Nothing
    , _dvrsResponseStatus = pResponseStatus_
    }

-- | Information about one or more VPCs.
dvrsVPCs :: Lens' DescribeVPCsResponse [VPC]
dvrsVPCs = lens _dvrsVPCs (\ s a -> s{_dvrsVPCs = a}) . _Default . _Coerce;

-- | The response status code.
dvrsResponseStatus :: Lens' DescribeVPCsResponse Int
dvrsResponseStatus = lens _dvrsResponseStatus (\ s a -> s{_dvrsResponseStatus = a});

instance NFData DescribeVPCsResponse