{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TemplateHaskell   #-}
{-# LANGUAGE TupleSections     #-}
module Stack.PackageDumpSpec where

import           Control.Applicative
import           Control.Monad.Logger
import           Control.Monad.Trans.Resource  (runResourceT)
import           Data.Conduit
import qualified Data.Conduit.Binary           as CB
import qualified Data.Conduit.List             as CL
import           Data.Conduit.Text             (decodeUtf8)
import           Data.Map                      (Map)
import qualified Data.Map                      as Map
import qualified Data.Set                      as Set
import           Distribution.System           (buildPlatform)
import           Distribution.License          (License(..))
import           Prelude -- Fix redundant imports warnings
import           Stack.PackageDump
import           Stack.Types.Compiler
import           Stack.Types.GhcPkgId
import           Stack.Types.PackageIdentifier
import           Stack.Types.PackageName
import           Stack.Types.Version
import           System.Process.Read
import           Test.Hspec
import           Test.Hspec.QuickCheck

main :: IO ()
main = hspec spec

spec :: Spec
spec = do
    describe "eachSection" $ do
        let test name content expected = it name $ do
                actual <- yield content $$ eachSection CL.consume =$ CL.consume
                actual `shouldBe` expected
        test
            "unix line endings"
            "foo\nbar\n---\nbaz---\nbin\n---\n"
            [ ["foo", "bar"]
            , ["baz---", "bin"]
            ]
        test
            "windows line endings"
            "foo\r\nbar\r\n---\r\nbaz---\r\nbin\r\n---\r\n"
            [ ["foo", "bar"]
            , ["baz---", "bin"]
            ]

    it "eachPair" $ do
        let bss =
                [ "key1: val1"
                , "key2: val2a"
                , "      val2b"
                , "key3:"
                , "key4:"
                , "   val4a"
                , "   val4b"
                ]
            sink k = fmap (k, ) CL.consume
        actual <- mapM_ yield bss $$ eachPair sink =$ CL.consume
        actual `shouldBe`
            [ ("key1", ["val1"])
            , ("key2", ["val2a", "val2b"])
            , ("key3", [])
            , ("key4", ["val4a", "val4b"])
            ]

    describe "conduitDumpPackage" $ do
        it "ghc 7.8" $ do
            haskell2010:_ <- runResourceT
                $ CB.sourceFile "test/package-dump/ghc-7.8.txt"
              =$= decodeUtf8
               $$ conduitDumpPackage
               =$ CL.consume
            ghcPkgId <- parseGhcPkgId "haskell2010-1.1.2.0-05c8dd51009e08c6371c82972d40f55a"
            packageIdent <- parsePackageIdentifier "haskell2010-1.1.2.0"
            depends <- mapM parseGhcPkgId
                [ "array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b"
                , "base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1"
                , "ghc-prim-0.3.1.0-a24f9c14c632d75b683d0f93283aea37"
                ]
            haskell2010 `shouldBe` DumpPackage
                { dpGhcPkgId = ghcPkgId
                , dpPackageIdent = packageIdent
                , dpLicense = Just BSD3
                , dpLibDirs = ["/opt/ghc/7.8.4/lib/ghc-7.8.4/haskell2010-1.1.2.0"]
                , dpDepends = depends
                , dpLibraries = ["HShaskell2010-1.1.2.0"]
                , dpHasExposedModules = True
                , dpHaddockInterfaces = ["/opt/ghc/7.8.4/share/doc/ghc/html/libraries/haskell2010-1.1.2.0/haskell2010.haddock"]
                , dpHaddockHtml = Just "/opt/ghc/7.8.4/share/doc/ghc/html/libraries/haskell2010-1.1.2.0"
                , dpProfiling = ()
                , dpHaddock = ()
                , dpSymbols = ()
                , dpIsExposed = False
                }

        it "ghc 7.10" $ do
            haskell2010:_ <- runResourceT
                $ CB.sourceFile "test/package-dump/ghc-7.10.txt"
              =$= decodeUtf8
               $$ conduitDumpPackage
               =$ CL.consume
            ghcPkgId <- parseGhcPkgId "ghc-7.10.1-325809317787a897b7a97d646ceaa3a3"
            pkgIdent <- parsePackageIdentifier "ghc-7.10.1"
            depends <- mapM parseGhcPkgId
                [ "array-0.5.1.0-e29cdbe82692341ebb7ce6e2798294f9"
                , "base-4.8.0.0-1b689eb8d72c4d4cc88f445839c1f01a"
                , "bin-package-db-0.0.0.0-708fc7d634a370b311371a5bcde40b62"
                , "bytestring-0.10.6.0-0909f8f31271f3d75749190bf2ee35db"
                , "containers-0.5.6.2-2114032c163425cc264e6e1169dc2f6d"
                , "directory-1.2.2.0-b4959b472d9eee380c6b32291ade29e0"
                , "filepath-1.4.0.0-40d643aa87258c186441a1f8f3e13ca6"
                , "hoopl-3.10.0.2-8c8dfc4c3140e5f7c982da224c3cb1f0"
                , "hpc-0.6.0.2-ac9064885aa8cb08a93314222939ead4"
                , "process-1.2.3.0-3b1e9bca6ac38225806ff7bbf3f845b1"
                , "template-haskell-2.10.0.0-e895139a0ffff267d412e3d0191ce93b"
                , "time-1.5.0.1-e17a9220d438435579d2914e90774246"
                , "transformers-0.4.2.0-c1a7bb855a176fe475d7b665301cd48f"
                , "unix-2.7.1.0-e5915eb989e568b732bc7286b0d0817f"
                ]
            haskell2010 `shouldBe` DumpPackage
                { dpGhcPkgId = ghcPkgId
                , dpPackageIdent = pkgIdent
                , dpLicense = Just BSD3
                , dpLibDirs = ["/opt/ghc/7.10.1/lib/ghc-7.10.1/ghc_EMlWrQ42XY0BNVbSrKixqY"]
                , dpHaddockInterfaces = ["/opt/ghc/7.10.1/share/doc/ghc/html/libraries/ghc-7.10.1/ghc.haddock"]
                , dpHaddockHtml = Just "/opt/ghc/7.10.1/share/doc/ghc/html/libraries/ghc-7.10.1"
                , dpDepends = depends
                , dpLibraries = ["HSghc-7.10.1-EMlWrQ42XY0BNVbSrKixqY"]
                , dpHasExposedModules = True
                , dpProfiling = ()
                , dpHaddock = ()
                , dpSymbols = ()
                , dpIsExposed = False
                }
        it "ghc 7.8.4 (osx)" $ do
            hmatrix:_ <- runResourceT
                $ CB.sourceFile "test/package-dump/ghc-7.8.4-osx.txt"
              =$= decodeUtf8
               $$ conduitDumpPackage
               =$ CL.consume
            ghcPkgId <- parseGhcPkgId "hmatrix-0.16.1.5-12d5d21f26aa98774cdd8edbc343fbfe"
            pkgId <- parsePackageIdentifier "hmatrix-0.16.1.5"
            depends <- mapM parseGhcPkgId
                [ "array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b"
                , "base-4.7.0.2-918c7ac27f65a87103264a9f51652d63"
                , "binary-0.7.1.0-108d06eea2ef05e517f9c1facf10f63c"
                , "bytestring-0.10.4.0-78bc8f2c724c765c78c004a84acf6cc3"
                , "deepseq-1.3.0.2-0ddc77716bd2515426e1ba39f6788a4f"
                , "random-1.1-822c19b7507b6ac1aaa4c66731e775ae"
                , "split-0.2.2-34cfb851cc3784e22bfae7a7bddda9c5"
                , "storable-complex-0.2.2-e962c368d58acc1f5b41d41edc93da72"
                , "vector-0.10.12.3-f4222db607fd5fdd7545d3e82419b307"]
            hmatrix `shouldBe` DumpPackage
                { dpGhcPkgId = ghcPkgId
                , dpPackageIdent = pkgId
                , dpLicense = Just BSD3
                , dpLibDirs =
                      [ "/Users/alexbiehl/.stack/snapshots/x86_64-osx/lts-2.13/7.8.4/lib/x86_64-osx-ghc-7.8.4/hmatrix-0.16.1.5"
                      , "/opt/local/lib/"
                      , "/usr/local/lib/"
                      ,  "C:/Program Files/Example/"]
                , dpHaddockInterfaces = ["/Users/alexbiehl/.stack/snapshots/x86_64-osx/lts-2.13/7.8.4/doc/html/hmatrix.haddock"]
                , dpHaddockHtml = Just "/Users/alexbiehl/.stack/snapshots/x86_64-osx/lts-2.13/7.8.4/doc/html"
                , dpDepends = depends
                , dpLibraries = ["HShmatrix-0.16.1.5"]
                , dpHasExposedModules = True
                , dpProfiling = ()
                , dpHaddock = ()
                , dpSymbols = ()
                , dpIsExposed = True
                }
        it "ghc HEAD" $ do
          ghcBoot:_ <- runResourceT
              $ CB.sourceFile "test/package-dump/ghc-head.txt"
            =$= decodeUtf8
             $$ conduitDumpPackage
             =$ CL.consume
          ghcPkgId <- parseGhcPkgId "ghc-boot-0.0.0.0"
          pkgId <- parsePackageIdentifier "ghc-boot-0.0.0.0"
          depends <- mapM parseGhcPkgId
            [ "base-4.9.0.0"
            , "binary-0.7.5.0"
            , "bytestring-0.10.7.0"
            , "directory-1.2.5.0"
            , "filepath-1.4.1.0"
            ]
          ghcBoot `shouldBe` DumpPackage
            { dpGhcPkgId = ghcPkgId
            , dpPackageIdent = pkgId
            , dpLicense = Just BSD3
            , dpLibDirs =
                  ["/opt/ghc/head/lib/ghc-7.11.20151213/ghc-boot-0.0.0.0"]
            , dpHaddockInterfaces = ["/opt/ghc/head/share/doc/ghc/html/libraries/ghc-boot-0.0.0.0/ghc-boot.haddock"]
            , dpHaddockHtml = Just "/opt/ghc/head/share/doc/ghc/html/libraries/ghc-boot-0.0.0.0"
            , dpDepends = depends
            , dpLibraries = ["HSghc-boot-0.0.0.0"]
            , dpHasExposedModules = True
            , dpProfiling = ()
            , dpHaddock = ()
            , dpSymbols = ()
            , dpIsExposed = True
            }


    it "ghcPkgDump + addProfiling + addHaddock" $ (id :: IO () -> IO ()) $ runNoLoggingT $ do
        menv' <- getEnvOverride buildPlatform
        menv <- mkEnvOverride buildPlatform $ Map.delete "GHC_PACKAGE_PATH" $ unEnvOverride menv'
        icache <- newInstalledCache
        ghcPkgDump menv Ghc []
            $  conduitDumpPackage
            =$ addProfiling icache
            =$ addHaddock icache
            =$ fakeAddSymbols
            =$ CL.sinkNull

    it "sinkMatching" $ do
        menv' <- getEnvOverride buildPlatform
        menv <- mkEnvOverride buildPlatform $ Map.delete "GHC_PACKAGE_PATH" $ unEnvOverride menv'
        icache <- newInstalledCache
        m <- runNoLoggingT $ ghcPkgDump menv Ghc []
            $  conduitDumpPackage
            =$ addProfiling icache
            =$ addHaddock icache
            =$ fakeAddSymbols
            =$ sinkMatching False False False (Map.singleton $(mkPackageName "transformers") $(mkVersion "0.0.0.0.0.0.1"))
        case Map.lookup $(mkPackageName "base") m of
            Nothing -> error "base not present"
            Just _ -> return ()
        Map.lookup $(mkPackageName "transformers") m `shouldBe` Nothing
        Map.lookup $(mkPackageName "ghc") m `shouldBe` Nothing

    describe "pruneDeps" $ do
        it "sanity check" $ do
            let prunes =
                    [ ((1, 'a'), [])
                    , ((1, 'b'), [])
                    , ((2, 'a'), [(1, 'b')])
                    , ((2, 'b'), [(1, 'a')])
                    , ((3, 'a'), [(1, 'c')])
                    , ((4, 'a'), [(2, 'a')])
                    ]
                actual = fst <$> pruneDeps fst fst snd bestPrune prunes
            actual `shouldBe` Map.fromList
                [ (1, (1, 'b'))
                , (2, (2, 'a'))
                , (4, (4, 'a'))
                ]

        prop "invariant holds" $ \prunes' ->
            -- Force uniqueness
            let prunes = Map.toList $ Map.fromList prunes'
             in checkDepsPresent prunes $ fst <$> pruneDeps fst fst snd bestPrune prunes

type PruneCheck = ((Int, Char), [(Int, Char)])

bestPrune :: PruneCheck -> PruneCheck -> PruneCheck
bestPrune x y
    | fst x > fst y = x
    | otherwise = y

checkDepsPresent :: [PruneCheck] -> Map Int (Int, Char) -> Bool
checkDepsPresent prunes selected =
    all hasDeps $ Set.toList allIds
  where
    depMap = Map.fromList prunes
    allIds = Set.fromList $ Map.elems selected

    hasDeps ident =
        case Map.lookup ident depMap of
            Nothing -> error "checkDepsPresent: missing in depMap"
            Just deps -> Set.null $ Set.difference (Set.fromList deps) allIds

-- addSymbols can't be reasonably tested like this
fakeAddSymbols :: Monad m => Conduit (DumpPackage a b c) m (DumpPackage a b Bool)
fakeAddSymbols = CL.map (\dp -> dp { dpSymbols = False })
