{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TupleSections #-}

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html

module Stratosphere.Resources.EC2VPC where

import Control.Lens hiding ((.=))
import Data.Aeson
import Data.Maybe (catMaybes)
import Data.Monoid (mempty)
import Data.Text

import Stratosphere.Values
import Stratosphere.ResourceProperties.Tag

-- | Full data type definition for EC2VPC. See 'ec2VPC' for a more convenient
-- constructor.
data EC2VPC =
  EC2VPC
  { _eC2VPCCidrBlock :: Val Text
  , _eC2VPCEnableDnsHostnames :: Maybe (Val Bool)
  , _eC2VPCEnableDnsSupport :: Maybe (Val Bool)
  , _eC2VPCInstanceTenancy :: Maybe (Val Text)
  , _eC2VPCTags :: Maybe [Tag]
  } deriving (Show, Eq)

instance ToJSON EC2VPC where
  toJSON EC2VPC{..} =
    object $
    catMaybes
    [ (Just . ("CidrBlock",) . toJSON) _eC2VPCCidrBlock
    , fmap (("EnableDnsHostnames",) . toJSON . fmap Bool') _eC2VPCEnableDnsHostnames
    , fmap (("EnableDnsSupport",) . toJSON . fmap Bool') _eC2VPCEnableDnsSupport
    , fmap (("InstanceTenancy",) . toJSON) _eC2VPCInstanceTenancy
    , fmap (("Tags",) . toJSON) _eC2VPCTags
    ]

instance FromJSON EC2VPC where
  parseJSON (Object obj) =
    EC2VPC <$>
      (obj .: "CidrBlock") <*>
      fmap (fmap (fmap unBool')) (obj .:? "EnableDnsHostnames") <*>
      fmap (fmap (fmap unBool')) (obj .:? "EnableDnsSupport") <*>
      (obj .:? "InstanceTenancy") <*>
      (obj .:? "Tags")
  parseJSON _ = mempty

-- | Constructor for 'EC2VPC' containing required fields as arguments.
ec2VPC
  :: Val Text -- ^ 'ecvpcCidrBlock'
  -> EC2VPC
ec2VPC cidrBlockarg =
  EC2VPC
  { _eC2VPCCidrBlock = cidrBlockarg
  , _eC2VPCEnableDnsHostnames = Nothing
  , _eC2VPCEnableDnsSupport = Nothing
  , _eC2VPCInstanceTenancy = Nothing
  , _eC2VPCTags = Nothing
  }

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-aws-ec2-vpc-cidrblock
ecvpcCidrBlock :: Lens' EC2VPC (Val Text)
ecvpcCidrBlock = lens _eC2VPCCidrBlock (\s a -> s { _eC2VPCCidrBlock = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-aws-ec2-vpc-EnableDnsHostnames
ecvpcEnableDnsHostnames :: Lens' EC2VPC (Maybe (Val Bool))
ecvpcEnableDnsHostnames = lens _eC2VPCEnableDnsHostnames (\s a -> s { _eC2VPCEnableDnsHostnames = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-aws-ec2-vpc-EnableDnsSupport
ecvpcEnableDnsSupport :: Lens' EC2VPC (Maybe (Val Bool))
ecvpcEnableDnsSupport = lens _eC2VPCEnableDnsSupport (\s a -> s { _eC2VPCEnableDnsSupport = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-aws-ec2-vpc-instancetenancy
ecvpcInstanceTenancy :: Lens' EC2VPC (Maybe (Val Text))
ecvpcInstanceTenancy = lens _eC2VPCInstanceTenancy (\s a -> s { _eC2VPCInstanceTenancy = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-aws-ec2-vpc-tags
ecvpcTags :: Lens' EC2VPC (Maybe [Tag])
ecvpcTags = lens _eC2VPCTags (\s a -> s { _eC2VPCTags = a })