{-# LANGUAGE Rank2Types #-}
module Distribution.Types.GenericPackageDescription.Lens (
    GenericPackageDescription,
    Flag,
    FlagName,
    ConfVar (..),
    module Distribution.Types.GenericPackageDescription.Lens,
    ) where

import Prelude()
import Distribution.Compat.Prelude
import Distribution.Compat.Lens

import qualified Distribution.Types.GenericPackageDescription as T

-- We import types from their packages, so we can remove unused imports
-- and have wider inter-module dependency graph
import Distribution.Types.CondTree (CondTree)
import Distribution.Types.Dependency (Dependency)
import Distribution.Types.Executable (Executable)
import Distribution.Types.PackageDescription (PackageDescription)
import Distribution.Types.Benchmark (Benchmark)
import Distribution.Types.ForeignLib (ForeignLib)
import Distribution.Types.GenericPackageDescription
  ( GenericPackageDescription(GenericPackageDescription)
  , Flag(MkFlag), FlagName, ConfVar (..))
import Distribution.Types.Library (Library)
import Distribution.Types.TestSuite (TestSuite)
import Distribution.Types.UnqualComponentName (UnqualComponentName)
import Distribution.System (Arch, OS)
import Distribution.Compiler (CompilerFlavor)
import Distribution.Version (VersionRange)

-------------------------------------------------------------------------------
-- GenericPackageDescription
-------------------------------------------------------------------------------

packageDescription :: Lens' GenericPackageDescription PackageDescription
packageDescription f s = fmap (\x -> s { T.packageDescription = x }) (f (T.packageDescription s))
{-# INLINE packageDescription #-}

genPackageFlags :: Lens' GenericPackageDescription [Flag]
genPackageFlags f s = fmap (\x -> s { T.genPackageFlags = x }) (f (T.genPackageFlags s))
{-# INLINE genPackageFlags #-}

condLibrary :: Lens' GenericPackageDescription (Maybe (CondTree ConfVar [Dependency] Library))
condLibrary f s = fmap (\x -> s { T.condLibrary = x }) (f (T.condLibrary s))
{-# INLINE condLibrary #-}

condSubLibraries :: Lens' GenericPackageDescription [(UnqualComponentName,(CondTree ConfVar [Dependency] Library))]
condSubLibraries f s = fmap (\x -> s { T.condSubLibraries = x }) (f (T.condSubLibraries s))
{-# INLINE condSubLibraries #-}

condForeignLibs :: Lens' GenericPackageDescription [(UnqualComponentName,(CondTree ConfVar [Dependency] ForeignLib))]
condForeignLibs f s = fmap (\x -> s { T.condForeignLibs = x }) (f (T.condForeignLibs s))
{-# INLINE condForeignLibs #-}

condExecutables :: Lens' GenericPackageDescription [(UnqualComponentName,(CondTree ConfVar [Dependency] Executable))]
condExecutables f s = fmap (\x -> s { T.condExecutables = x }) (f (T.condExecutables s))
{-# INLINE condExecutables #-}

condTestSuites :: Lens' GenericPackageDescription [(UnqualComponentName,(CondTree ConfVar [Dependency] TestSuite))]
condTestSuites f s = fmap (\x -> s { T.condTestSuites = x }) (f (T.condTestSuites s))
{-# INLINE condTestSuites #-}

condBenchmarks :: Lens' GenericPackageDescription [(UnqualComponentName,(CondTree ConfVar [Dependency] Benchmark))]
condBenchmarks f s = fmap (\x -> s { T.condBenchmarks = x }) (f (T.condBenchmarks s))
{-# INLINE condBenchmarks #-}

allCondTrees
  :: Applicative f
  => (forall a. CondTree ConfVar [Dependency] a
          -> f (CondTree ConfVar [Dependency] a))
  -> GenericPackageDescription
  -> f GenericPackageDescription
allCondTrees f (GenericPackageDescription p a1 x1 x2 x3 x4 x5 x6) =
    GenericPackageDescription
        <$> pure p
        <*> pure a1
        <*> traverse f x1
        <*> (traverse . _2) f x2
        <*> (traverse . _2) f x3
        <*> (traverse . _2) f x4
        <*> (traverse . _2) f x5
        <*> (traverse . _2) f x6


-------------------------------------------------------------------------------
-- Flag
-------------------------------------------------------------------------------

flagName :: Lens' Flag FlagName
flagName f (MkFlag x1 x2 x3 x4) = fmap (\y1 -> MkFlag y1 x2 x3 x4) (f x1)
{-# INLINE flagName #-}

flagDescription :: Lens' Flag String
flagDescription f (MkFlag x1 x2 x3 x4) = fmap (\y1 -> MkFlag x1 y1 x3 x4) (f x2)
{-# INLINE flagDescription #-}

flagDefault :: Lens' Flag Bool
flagDefault f (MkFlag x1 x2 x3 x4) = fmap (\y1 -> MkFlag x1 x2 y1 x4) (f x3)
{-# INLINE flagDefault #-}

flagManual :: Lens' Flag Bool
flagManual f (MkFlag x1 x2 x3 x4) = fmap (\y1 -> MkFlag x1 x2 x3 y1) (f x4)
{-# INLINE flagManual #-}

-------------------------------------------------------------------------------
-- ConfVar
-------------------------------------------------------------------------------

_OS :: Traversal' ConfVar OS
_OS f (OS os) = OS <$> f os
_OS _ x       = pure x

_Arch :: Traversal' ConfVar Arch
_Arch f (Arch arch) = Arch <$> f arch
_Arch _ x           = pure x

_Flag :: Traversal' ConfVar FlagName
_Flag f (Flag flag) = Flag <$> f flag
_Flag _ x           = pure x

_Impl :: Traversal' ConfVar (CompilerFlavor, VersionRange)
_Impl f (Impl cf vr) = uncurry Impl <$> f (cf, vr)
_Impl _ x            = pure x
