{-# LANGUAGE TemplateHaskell #-}
module Puppet.Language.WireCatalog

where

import           XPrelude

import           Data.Aeson

import           Puppet.Language.Core
import           Puppet.Language.Resource

-- | Used to represent a relationship between two resources within the wired format (json).
--
-- See <http://docs.puppetlabs.com/puppetdb/2.3/api/wire_format/catalog_format_v5.html#data-type-edge>
data PuppetEdge = PuppetEdge RIdentifier RIdentifier LinkType deriving Show

instance FromJSON PuppetEdge where
    parseJSON (Object v) = PuppetEdge <$> v .: "source" <*> v .: "target" <*> v .: "relationship"
    parseJSON _ = fail "invalid puppet edge"

instance ToJSON PuppetEdge where
    toJSON (PuppetEdge s t r) = object [("source", toJSON s), ("target", toJSON t), ("relationship", toJSON r)]

-- | See <http://docs.puppetlabs.com/puppetdb/1.5/api/wire_format/catalog_format.html puppet reference>.
data WireCatalog = WireCatalog
    { _wireCatalogNodename        :: !NodeName
    , _wireCatalogVersion         :: !Text
    , _wireCatalogEdges           :: !(Vector PuppetEdge)
    , _wireCatalogResources       :: !(Vector Resource)
    , _wireCatalogTransactionUUID :: !Text
} deriving Show

makeClassy ''WireCatalog

instance FromJSON WireCatalog where
  parseJSON (Object d) = d .: "data" >>= \case
      (Object v) -> WireCatalog
              <$> v .: "name"
              <*> v .: "version"
              <*> v .: "edges"
              <*> v .: "resources"
              <*> v .: "transaction-uuid"
      _ -> fail "Data is not an object"
  parseJSON _ = fail "invalid wire catalog"

instance ToJSON WireCatalog where
  toJSON (WireCatalog n v e r t) = object [("metadata", object [("api_version", Number 1)]), ("data", object d)]
    where d = [ ("name", String n)
              , ("version", String v)
              , ("edges", toJSON e)
              , ("resources", toJSON r)
              , ("transaction-uuid", String t)
              ]
