{-# LANGUAGE PackageImports    #-}
module Language.PureScript.Ide.Test where

import Control.Concurrent.STM (newTVarIO, readTVarIO)
import "monad-logger" Control.Monad.Logger (NoLoggingT(..))
import Data.IORef (newIORef)
import Data.Map qualified as Map
import Language.PureScript.Ide (handleCommand)
import Language.PureScript.Ide.Command (Command)
import Language.PureScript.Ide.Error (IdeError)
import Language.PureScript.Ide.Types
import Protolude
import System.Directory (doesDirectoryExist, getCurrentDirectory, makeAbsolute, removeDirectoryRecursive, setCurrentDirectory)
import System.FilePath ((</>))
import System.Process (createProcess, getProcessExitCode, shell)

import Language.PureScript qualified as P

defConfig :: IdeConfiguration
defConfig =
  IdeConfiguration
    { confLogLevel = LogNone
    , confOutputPath = "output/"
    , confGlobs = ["src/**/*.purs"]
    }

runIde' :: IdeConfiguration -> IdeState -> [Command] -> IO ([Either IdeError Success], IdeState)
runIde' conf s cs = do
  stateVar <- newTVarIO s
  ts <- newIORef Nothing
  let env' = IdeEnvironment {ideStateVar = stateVar, ideConfiguration = conf, ideCacheDbTimestamp = ts}
  r <- runNoLoggingT (runReaderT (traverse (runExceptT . handleCommand) cs) env')
  newState <- readTVarIO stateVar
  pure (r, newState)

runIde :: [Command] -> IO ([Either IdeError Success], IdeState)
runIde = runIde' defConfig emptyIdeState

volatileState :: IdeState -> [(Text, [IdeDeclarationAnn])] -> IdeState
volatileState s ds =
  s {ideVolatileState = vs}
  where
    vs = IdeVolatileState (AstData Map.empty) (Map.fromList decls) Nothing
    decls = map (first P.moduleNameFromString) ds

annLoc :: IdeDeclarationAnn -> P.SourceSpan -> IdeDeclarationAnn
annLoc (IdeDeclarationAnn a d) loc = IdeDeclarationAnn a {_annLocation = Just loc} d

annExp :: IdeDeclarationAnn -> Text -> IdeDeclarationAnn
annExp (IdeDeclarationAnn a d) e = IdeDeclarationAnn a {_annExportedFrom = Just (mn e)} d


ida :: IdeDeclaration -> IdeDeclarationAnn
ida = IdeDeclarationAnn emptyAnn

-- | Builders for Ide declarations
ideValue :: Text -> Maybe P.SourceType -> IdeDeclarationAnn
ideValue i ty = ida (IdeDeclValue (IdeValue (P.Ident i) (fromMaybe P.tyString ty)))

ideType :: Text -> Maybe P.SourceType -> [(P.ProperName 'P.ConstructorName, P.SourceType)] -> IdeDeclarationAnn
ideType pn ki dtors = ida (IdeDeclType (IdeType (P.ProperName pn) (fromMaybe P.kindType ki) dtors))

ideSynonym :: Text -> Maybe P.SourceType -> Maybe P.SourceType -> IdeDeclarationAnn
ideSynonym pn ty kind = ida (IdeDeclTypeSynonym (IdeTypeSynonym (P.ProperName pn) (fromMaybe P.tyString ty) (fromMaybe P.kindType kind)))

ideTypeClass :: Text -> P.SourceType -> [IdeInstance] -> IdeDeclarationAnn
ideTypeClass pn kind instances = ida (IdeDeclTypeClass (IdeTypeClass (P.ProperName pn) kind instances))

ideDtor :: Text -> Text -> Maybe P.SourceType -> IdeDeclarationAnn
ideDtor pn tn ty = ida (IdeDeclDataConstructor (IdeDataConstructor (P.ProperName pn) (P.ProperName tn) (fromMaybe P.tyString ty)))

ideValueOp :: Text -> P.Qualified (Either Text Text) -> Integer -> Maybe P.Associativity -> Maybe P.SourceType -> IdeDeclarationAnn
ideValueOp opName ident precedence assoc t =
  ida (IdeDeclValueOperator
       (IdeValueOperator
        (P.OpName opName)
        (bimap P.Ident P.ProperName <$> ident)
        precedence
        (fromMaybe P.Infix assoc)
        t))

ideTypeOp :: Text -> P.Qualified Text -> Integer -> Maybe P.Associativity -> Maybe P.SourceType -> IdeDeclarationAnn
ideTypeOp opName ident precedence assoc k =
  ida (IdeDeclTypeOperator
       (IdeTypeOperator
        (P.OpName opName)
        (P.ProperName <$> ident)
        precedence
        (fromMaybe P.Infix assoc)
        k))

ideKind :: Text -> IdeDeclarationAnn
ideKind pn = ideType pn (Just P.kindType) []

ideModule :: Text -> IdeDeclarationAnn
ideModule name = ida (IdeDeclModule (mn name))

moduleSS, valueSS, synonymSS, typeSS, classSS, valueOpSS, typeOpSS :: P.SourceSpan
moduleSS = ss 1 1
valueSS = ss 3 1
synonymSS = ss 5 1
typeSS = ss 7 1
classSS = ss 8 1
valueOpSS = ss 12 1
typeOpSS = ss 13 1

ss :: Int -> Int -> P.SourceSpan
ss x y = P.SourceSpan "Test.purs" (P.SourcePos x y) (P.SourcePos x y)

mn :: Text -> P.ModuleName
mn = P.moduleNameFromString

projectDir :: FilePath
projectDir = "." </> "tests" </> "support" </> "pscide"

getProjectDirectory :: IO FilePath
getProjectDirectory = makeAbsolute projectDir

inProject :: IO a -> IO a
inProject f = do
  cwd' <- getCurrentDirectory
  setCurrentDirectory projectDir
  a <- f
  setCurrentDirectory cwd'
  pure a

compileTestProject :: IO Bool
compileTestProject = inProject $ do
  (_, _, _, procHandle) <-
    createProcess $ shell "purs compile \"src/**/*.purs\""
  r <- tryNTimes 10 (getProcessExitCode procHandle)
  pure (maybe False isSuccess r)

isSuccess :: ExitCode -> Bool
isSuccess ExitSuccess = True
isSuccess (ExitFailure _) = False

tryNTimes :: Int -> IO (Maybe a) -> IO (Maybe a)
tryNTimes 0 _ = pure Nothing
tryNTimes n action = do
  r <- action
  case r of
    Nothing -> do
      threadDelay 500000
      tryNTimes (n - 1) action
    Just a -> pure (Just a)

deleteOutputFolder :: IO ()
deleteOutputFolder = inProject $
  whenM (doesDirectoryExist "output") (removeDirectoryRecursive "output")