{-# LANGUAGE DataKinds                   #-}
{-# LANGUAGE DeriveGeneric               #-}
{-# LANGUAGE FlexibleInstances           #-}
{-# LANGUAGE GeneralizedNewtypeDeriving  #-}
{-# LANGUAGE LambdaCase                  #-}
{-# LANGUAGE NoImplicitPrelude           #-}
{-# LANGUAGE OverloadedStrings           #-}
{-# LANGUAGE RecordWildCards             #-}
{-# LANGUAGE TypeFamilies                #-}

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

-- Module      : Network.AWS.EC2.CreateDhcpOptions
-- Copyright   : (c) 2013-2014 Brendan Hay <brendan.g.hay@gmail.com>
-- License     : This Source Code Form is subject to the terms of
--               the Mozilla Public License, v. 2.0.
--               A copy of the MPL can be found in the LICENSE file or
--               you can obtain it at http://mozilla.org/MPL/2.0/.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : experimental
-- Portability : non-portable (GHC extensions)
--
-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- | Creates a set of DHCP options for your VPC. After creating the set, you must
-- associate it with the VPC, causing all existing and new instances that you
-- launch in the VPC to use this set of DHCP options. The following are the
-- individual DHCP options you can specify. For more information about the
-- options, see <http://www.ietf.org/rfc/rfc2132.txt RFC 2132>.
--
-- 'domain-name-servers' - The IP addresses of up to four domain name servers,
-- or 'AmazonProvidedDNS'. The default DHCP option set specifies 'AmazonProvidedDNS'. If specifying more than one domain name server, specify the IP addresses in a single parameter, separated by commas.
-- 'domain-name' - If you're using AmazonProvidedDNS in 'us-east-1', specify 'ec2.internal'. If you're using AmazonProvidedDNS in another region, specify 'region.compute.internal' (for example, 'ap-northeast-1.compute.internal'). Otherwise, specify a domain
-- name (for example, 'MyCompany.com'). Important: Some Linux operating systems
-- accept multiple domain names separated by spaces. However, Windows and other
-- Linux operating systems treat the value as a single domain, which results in
-- unexpected behavior. If your DHCP options set is associated with a VPC that
-- has instances with multiple operating systems, specify only one domain name.  'ntp-servers' - The IP addresses of up to four Network Time Protocol (NTP)
-- servers.  'netbios-name-servers' - The IP addresses of up to four NetBIOS name
-- servers.  'netbios-node-type' - The NetBIOS node type (1, 2, 4, or 8). We
-- recommend that you specify 2 (broadcast and multicast are not currently
-- supported). For more information about these node types, see <http://www.ietf.org/rfc/rfc2132.txt RFC 2132>.   Your
-- VPC automatically starts out with a set of DHCP options that includes only a
-- DNS server that we provide (AmazonProvidedDNS). If you create a set of
-- options, and if your VPC has an Internet gateway, make sure to set the 'domain-name-servers' option either to 'AmazonProvidedDNS' or to a domain name server of your
-- choice. For more information about DHCP options, see <http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_DHCP_Options.html DHCP Options Sets> in the /Amazon Virtual Private Cloud User Guide/.
--
-- <http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-CreateDhcpOptions.html>
module Network.AWS.EC2.CreateDhcpOptions
    (
    -- * Request
      CreateDhcpOptions
    -- ** Request constructor
    , createDhcpOptions
    -- ** Request lenses
    , cdoDhcpConfigurations
    , cdoDryRun

    -- * Response
    , CreateDhcpOptionsResponse
    -- ** Response constructor
    , createDhcpOptionsResponse
    -- ** Response lenses
    , cdorDhcpOptions
    ) where

import Network.AWS.Prelude
import Network.AWS.Request.Query
import Network.AWS.EC2.Types
import qualified GHC.Exts

data CreateDhcpOptions = CreateDhcpOptions
    { _cdoDhcpConfigurations :: List "item" NewDhcpConfiguration
    , _cdoDryRun             :: Maybe Bool
    } deriving (Eq, Read, Show)

-- | 'CreateDhcpOptions' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'cdoDhcpConfigurations' @::@ ['NewDhcpConfiguration']
--
-- * 'cdoDryRun' @::@ 'Maybe' 'Bool'
--
createDhcpOptions :: CreateDhcpOptions
createDhcpOptions = CreateDhcpOptions
    { _cdoDryRun             = Nothing
    , _cdoDhcpConfigurations = mempty
    }

-- | A DHCP configuration option.
cdoDhcpConfigurations :: Lens' CreateDhcpOptions [NewDhcpConfiguration]
cdoDhcpConfigurations =
    lens _cdoDhcpConfigurations (\s a -> s { _cdoDhcpConfigurations = a })
        . _List

cdoDryRun :: Lens' CreateDhcpOptions (Maybe Bool)
cdoDryRun = lens _cdoDryRun (\s a -> s { _cdoDryRun = a })

newtype CreateDhcpOptionsResponse = CreateDhcpOptionsResponse
    { _cdorDhcpOptions :: Maybe DhcpOptions
    } deriving (Eq, Read, Show)

-- | 'CreateDhcpOptionsResponse' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'cdorDhcpOptions' @::@ 'Maybe' 'DhcpOptions'
--
createDhcpOptionsResponse :: CreateDhcpOptionsResponse
createDhcpOptionsResponse = CreateDhcpOptionsResponse
    { _cdorDhcpOptions = Nothing
    }

-- | A set of DHCP options.
cdorDhcpOptions :: Lens' CreateDhcpOptionsResponse (Maybe DhcpOptions)
cdorDhcpOptions = lens _cdorDhcpOptions (\s a -> s { _cdorDhcpOptions = a })

instance ToPath CreateDhcpOptions where
    toPath = const "/"

instance ToQuery CreateDhcpOptions where
    toQuery CreateDhcpOptions{..} = mconcat
        [ "DhcpConfiguration" `toQueryList` _cdoDhcpConfigurations
        , "DryRun"            =? _cdoDryRun
        ]

instance ToHeaders CreateDhcpOptions

instance AWSRequest CreateDhcpOptions where
    type Sv CreateDhcpOptions = EC2
    type Rs CreateDhcpOptions = CreateDhcpOptionsResponse

    request  = post "CreateDhcpOptions"
    response = xmlResponse

instance FromXML CreateDhcpOptionsResponse where
    parseXML x = CreateDhcpOptionsResponse
        <$> x .@? "dhcpOptions"
