module Shaker.Cabal.CabalInfoTest
 where 

import Control.Monad.Reader
import System.Directory
import Shaker.Action.Compile
import Shaker.Action.Clean
import Shaker.Type
import Shaker.Io
import Test.HUnit
import Control.Exception
import Shaker.Cabal.CabalInfo
import GHC(DynFlags(DynFlags))
import DynFlags(
    DynFlags, verbosity, ghcLink, packageFlags, outputFile, hiDir, objectDir ,importPaths
    ,PackageFlag (ExposePackage)
    ,GhcLink (NoLink)
  )

testParseCabalConfig :: Test
testParseCabalConfig = TestCase $ runTestOnDirectory "testsuite/tests/resources/cabalTest" $ do  
  shIn <- defaultCabalInput
  let cplInps@(cplLib:cplExe:[]) = compileInputs shIn
  length cplInps == 2 @? "Should have two compile input, one executable and one library, got "++ show ( length cplInps)
  cfSourceDirs cplLib == ["src"] @? "source dir should be src, got " ++ show (cfSourceDirs cplLib)
  cfCommandLineFlags cplLib == ["-Wall"] @? "command line flags should be -Wall, got " ++ show ( cfCommandLineFlags cplLib)
  cfTargetFiles cplLib == ["CabalTest"]  @? "targetFiles should be CabalTest, got "++ show ( cfTargetFiles cplLib)
  cfTargetFiles cplExe == ["src/Main.hs"]  @? "targetFiles should be src/Main.hs, got "++ show ( cfTargetFiles cplExe)
  let dFlags = cfDynFlags cplExe DynFlags{}
  importPaths dFlags == ["src"] @? "importPaths should be src, got "++ show (importPaths dFlags)
  packageFlags dFlags == [ExposePackage "ghc"] @? "Expected : ExposePackage ghc. No show instance so figure it yourself... (/me being lazy)" 
  let (ListenerInput (flLib:[]) _) = listenerInput shIn
  dir flLib == "src" @? "Expected : src, got " ++ show  flLib

testInvalidMainShouldBeExcluded :: Test
testInvalidMainShouldBeExcluded = TestCase $ runTestOnDirectory "testsuite/tests/resources/invalidMain" $ do
 shIn <- defaultCabalInput
 let (cplExe:[]) = compileInputs shIn
 cfTargetFiles cplExe == ["src/Main.hs"] @? "since tests/Main.hs is invalid, should have only src/Main.hs, got " ++ show (cfTargetFiles cplExe)

testCompileWithLocalSource :: Test
testCompileWithLocalSource = TestCase $ runTestOnDirectory "testsuite/tests/resources/noSourceConfig" $ do
 shIn <- defaultCabalInput
 runReaderT runCompile shIn
 ex <- doesFileExist "target/Main.o" 
 runReaderT runClean shIn
 ex2 <- doesFileExist "target/Main.o" 
 ex && not ex2 @? "file main should exist and be cleaned"


testProjectCabalContentWithLocalSource :: Test
testProjectCabalContentWithLocalSource = TestCase $
    runTestOnDirectory "testsuite/tests/resources/noSourceConfig" $ do
    shIn <- defaultCabalInput
    let cplInps@(cplInp:_) = compileInputs shIn
    length cplInps == 1 @? "Should have one compile input, got "++ show (length cplInps)
    let targs = cfTargetFiles cplInp
    targs == ["./noHsSource.hs"] @? "Expected [\"./noHsSource.hs\"] got " ++ show cplInp

runTestOnDirectory :: FilePath -> Assertion -> Assertion
runTestOnDirectory fp fun = do
  oldDir <- getCurrentDirectory 
  setCurrentDirectory fp
  finally fun (setCurrentDirectory oldDir)