{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE OverloadedStrings #-}
module Generator (generate, hsRouteName, genFay) where
import Prelude hiding (readFile)
import System.IO (FilePath, writeFile)
import System.IO.Strict (readFile)
import System.FilePath (joinPath)    
import System.Directory (createDirectoryIfMissing)
import Data.String.Utils (rstrip)    
import AST
import Text.Shakespeare.Text hiding (toText)
import qualified Data.Text as T
import Data.List
import Data.Maybe
import Control.Monad
import Data.Char

import Generator.Models
import Generator.EntityFactories
import Generator.Classes
import Generator.Routes
import Generator.Validation
import Generator.Handlers
import Generator.EsqueletoInstances
import Generator.Cabal
import Generator.Fay
import SyncFile

writeRoute :: Module -> Route -> IO ()
writeRoute m r = syncFile (joinPath ["Handler", moduleName m, 
                                      routeModuleName r ++ ".hs"]) $
    T.unpack $(codegenFile "codegen/route-header.cg")
        ++ (concatMap (handler m r) (routeHandlers r))


    
generate :: FilePath -> Module -> IO ()
generate path m = do
    syncCabal path m
    createDirectoryIfMissing True (joinPath ["Handler", moduleName m])
    syncFile (joinPath ["Handler", moduleName m, "Enums.hs"]) $
        T.unpack $(codegenFile "codegen/enums-header.cg")
            ++ (concatMap enum $ modEnums m)
    syncFile (joinPath ["Handler", moduleName m, "Esqueleto.hs"]) $
        T.unpack $(codegenFile "codegen/esqueleto-header.cg")
        ++ (esqueletoInstances m)        
    syncFile (joinPath ["Handler", moduleName m, "Internal.hs"]) $
        T.unpack $(codegenFile "codegen/header.cg")
            ++ models m
            ++ entityFactories m
            ++ classes m
            ++ validation m
            ++ (T.unpack $(codegenFile "codegen/json-wrapper.cg"))      
    forM_ (modRoutes m) (writeRoute m)
    syncFile (joinPath ["Handler", moduleName m, "Routes.hs"]) $
           routes m
    syncFile (joinPath ["Handler", moduleName m ++ ".hs"]) $ 
        T.unpack $(codegenFile "codegen/dispatch.cg")
    where
           routeImport r = T.unpack $(codegenFile "codegen/route-import.cg")

                            

genFay :: FilePath -> Module -> IO ()
genFay path m = do
    syncFile path $ fay m