{-# LANGUAGE OverloadedStrings #-}

{- |
Module      :  $Header$
Description :  
Author      :  Nils 'bash0r' Jonsson
Copyright   :  (c) 2015 Nils 'bash0r' Jonsson
License     :  MIT

Maintainer  :  aka.bash0r@gmail.com
Stability   :  unstable
Portability :  non-portable (Portability is untested.)

The 'Configuration' module contains all relevant information
-}
module Headergen.Configuration
( Configuration (..)
, createDictionary
) where


import Control.Applicative
import Control.Monad

import Data.Aeson

import Headergen.Template


-- | The configuration is used to read / write configuration to JSON.
data Configuration = Configuration
  { getModule      :: String
  , getDescription :: String
  , getAuthor      :: String
  , getCopyright   :: String
  , getLicense     :: String
  , getMaintainer  :: String
  , getStability   :: String
  , getPortability :: String
  }
  deriving (Show, Eq)

instance ToJSON Configuration where
  toJSON (Configuration mod desc auth copyr lic maint stab portab) =
    object [ "module"      .= mod
           , "author"      .= auth
           , "description" .= desc
           , "copyright"   .= copyr
           , "license"     .= lic
           , "maintainer"  .= maint
           , "stability"   .= stab
           , "portability" .= portab
           ]

instance FromJSON Configuration where
  parseJSON (Object o) =
    Configuration <$> o .: "module"
                  <*> o .: "description"
                  <*> o .: "author"
                  <*> o .: "copyright"
                  <*> o .: "license"
                  <*> o .: "maintainer"
                  <*> o .: "stability"
                  <*> o .: "portability"
  parseJSON _          =
    empty

createDictionary :: Configuration -> Dictionary
createDictionary (Configuration mod des aut cop lic mai sta por) =
  [ ("module"     , mod)
  , ("description", des)
  , ("author"     , aut)
  , ("copyright"  , cop)
  , ("license"    , lic)
  , ("maintainer" , mai)
  , ("stability"  , sta)
  , ("portability", por)
  ]