{-# LANGUAGE QuasiQuotes #-}
module Language.Java.Paragon.PiGeneration where

import Language.Java.Paragon.Syntax
import Control.Applicative
import Language.Java.Paragon.QuasiQuoter

piTransform :: CompilationUnit -> CompilationUnit 
piTransform  = transformCompilationUnit
--for generating Pi there should be a package name
-- no imports
-- one type for each compilationUnit since the execution is for one class but we can transform without considering that condition
transformCompilationUnit :: CompilationUnit -> CompilationUnit
transformCompilationUnit (CompilationUnit mpDecl _  tdecls)
  = CompilationUnit mpDecl []  (transformTypeDecl<$>tdecls)
----------------
transformTypeDecl :: TypeDecl -> TypeDecl
transformTypeDecl (InterfaceTypeDecl (InterfaceDecl mods iden tparams refts ib))
  =  ClassTypeDecl (ClassDecl mods iden tparams Nothing refts (transformInterfaceBody ib)) -- Maybe typeDecl
transformTypeDecl (ClassTypeDecl (ClassDecl mods iden tparams mt refts (ClassBody dcls))) 
  = ClassTypeDecl (ClassDecl mods iden tparams mt refts (ClassBody $ transformDecl<$>dcls))
----------------    
transformDecl :: Decl -> Decl    
transformDecl (MemberDecl md) = MemberDecl $ transformMemberDecl md 
----------------
transformInterfaceBody :: InterfaceBody -> ClassBody
transformInterfaceBody (InterfaceBody mds) = ClassBody $ (\md->MemberDecl (transformMemberDecl md))<$>mds
-------------
transformMemberDecl :: MemberDecl -> MemberDecl 
transformMemberDecl f@(FieldDecl fmods [typeQQ|actor|] vdecs) = f
transformMemberDecl (FieldDecl fmods ft vdecs) = (FieldDecl fmods ft (transformVarDecls vdecs))
transformMemberDecl m@(MethodDecl mmods mtparams mmaybet mident mformparams mexceptionspecs mb) 
  | Typemethod `elem` mmods  = m
  | otherwise  = MethodDecl mmods mtparams mmaybet mident mformparams mexceptionspecs (transformMethodBody mb)
transformMemberDecl (ConstructorDecl cmods ctparams cident cformparams cexceptionspecs cb) 
  = ConstructorDecl cmods ctparams cident cformparams cexceptionspecs (transformConstructorBody cb)
transformMemberDecl x = x
-- I assumed the LockDecl and PolicyDecl should not be touch 
-- Also I didnt write code for inner classes/interfaces 
------
transformVarDecls :: [VarDecl] -> [VarDecl]
transformVarDecls vds = [ VarDecl varDeclId Nothing | (VarDecl varDeclId _) <- vds]
-------
transformMethodBody :: MethodBody -> MethodBody
transformMethodBody = const $MethodBody  Nothing -- [methodBodyQQ|{}|] 
-- maybe we have to add nothing instead of "just emptyMethodBody" 
-------
transformConstructorBody ::  ConstructorBody -> ConstructorBody
transformConstructorBody (ConstructorBody explConstrInvm bs) = ConstructorBody  Nothing [] -- second argument nothing ?