{-# LANGUAGE QuasiQuotes         #-}
{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE OverloadedStrings   #-}

module Stack.LockSpec
  ( toBlobKey
  , decodeSHA
  , decodeLocked
  , spec
  ) where

import           Data.Aeson.WarningParser ( WithJSONWarnings (..) )
import qualified Data.Yaml as Yaml
import           Distribution.Types.PackageName ( mkPackageName )
import           Distribution.Types.Version ( mkVersion )
import           Pantry
                   ( BlobKey (..), FileSize (..), PackageIdentifier (..)
                   , PackageLocationImmutable (..), PackageMetadata (..)
                   , RawPackageLocationImmutable (..), RawPackageMetadata (..)
                   , Repo (..), RepoType (..), SHA256, TreeKey (..)
                   , resolvePaths
                   )
import qualified Pantry.SHA256 as SHA256
import           RIO ( ByteString, displayException, throwIO, unless )
import           Stack.Lock ( Locked (..), LockedLocation (..) )
import           Test.Hspec ( Spec, it, shouldBe )
import           Text.RawString.QQ ( r )

toBlobKey :: ByteString -> Word -> BlobKey
toBlobKey string size = BlobKey (decodeSHA string) (FileSize size)

decodeSHA :: ByteString -> SHA256
decodeSHA string =
    case SHA256.fromHexBytes string of
        Right csha -> csha
        Left err -> error $ "Failed decoding. Error:  " <> displayException err

decodeLocked :: ByteString -> IO Locked
decodeLocked bs = do
  val <- Yaml.decodeThrow  bs
  case Yaml.parseEither Yaml.parseJSON val of
    Left err -> throwIO $ Yaml.AesonException err
    Right (WithJSONWarnings res warnings) -> do
      unless (null warnings) $
        throwIO $ Yaml.AesonException $ "Unexpected warnings: " ++ show warnings
      -- we just assume no file references
      resolvePaths Nothing res

spec :: Spec
spec = do
    it "parses lock file (empty with GHC snapshot)" $ do
        let lockFile :: ByteString
            lockFile =
                [r|#some
snapshots:
- completed:
    compiler: ghc-8.6.5
  original:
    compiler: ghc-8.6.5
packages: []
|]
        pkgImm <- (.pkgImmutableLocations) <$> decodeLocked lockFile
        pkgImm `shouldBe` []
    it "parses lock file (empty with LTS snapshot)" $ do
        let lockFile :: ByteString
            lockFile =
                [r|#some
snapshots:
- completed:
    size: 527801
    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/11/22.yaml
    sha256: 7c8b1853da784bd7beb8728168bf4e879d8a2f6daf408ca0fa7933451864a96a
  original: lts-14.27
- completed:
    compiler: ghc-8.6.5
  original:
    compiler: ghc-8.6.5
packages: []
|]
        pkgImm <- (.pkgImmutableLocations) <$> decodeLocked lockFile
        pkgImm `shouldBe` []
    it "parses lock file (LTS, wai + warp)" $ do
        let lockFile :: ByteString
            lockFile =
                [r|#some
snapshots:
- completed:
    size: 527801
    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/11/22.yaml
    sha256: 7c8b1853da784bd7beb8728168bf4e879d8a2f6daf408ca0fa7933451864a96a
  original: lts-14.27
- completed:
    compiler: ghc-8.6.5
  original:
    compiler: ghc-8.6.5
packages:
- original:
    subdir: wai
    git: https://github.com/yesodweb/wai.git
    commit: d11d63f1a6a92db8c637a8d33e7953ce6194a3e0
  completed:
    subdir: wai
    name: wai
    version: 3.2.1.2
    git: https://github.com/yesodweb/wai.git
    pantry-tree:
      size: 714
      sha256: ecfd0b4b75f435a3f362394807b35e5ef0647b1a25005d44a3632c49db4833d2
    commit: d11d63f1a6a92db8c637a8d33e7953ce6194a3e0
- original:
    subdir: warp
    git: https://github.com/yesodweb/wai.git
    commit: d11d63f1a6a92db8c637a8d33e7953ce6194a3e0
  completed:
    subdir: warp
    name: warp
    version: 3.2.25
    git: https://github.com/yesodweb/wai.git
    pantry-tree:
      size: 5103
      sha256: f808e075811b002563d24c393ce115be826bb66a317d38da22c513ee42b7443a
    commit: d11d63f1a6a92db8c637a8d33e7953ce6194a3e0
|]
        pkgImm <- (.pkgImmutableLocations) <$> decodeLocked lockFile
        let waiSubdirRepo subdir =
              Repo { repoType = RepoGit
                   , repoUrl = "https://github.com/yesodweb/wai.git"
                   , repoCommit =
                       "d11d63f1a6a92db8c637a8d33e7953ce6194a3e0"
                   , repoSubdir = subdir
                   }
            emptyRPM = RawPackageMetadata { rpmName = Nothing
                                          , rpmVersion = Nothing
                                          , rpmTreeKey = Nothing
                                          }
        pkgImm `shouldBe`
            [ LockedLocation
              (RPLIRepo (waiSubdirRepo "wai") emptyRPM)
              (PLIRepo (waiSubdirRepo "wai")
                    (PackageMetadata { pmIdent =
                                         PackageIdentifier
                                         { pkgName = mkPackageName "wai"
                                         , pkgVersion = mkVersion [3, 2, 1, 2]
                                         }
                                     , pmTreeKey =
                                         TreeKey
                                         (BlobKey
                                           (decodeSHA
                                             "ecfd0b4b75f435a3f362394807b35e5ef0647b1a25005d44a3632c49db4833d2")
                                           (FileSize 714))
                                     }))
            , LockedLocation
              (RPLIRepo (waiSubdirRepo "warp") emptyRPM)
              (PLIRepo (waiSubdirRepo "warp")
                   (PackageMetadata { pmIdent =
                                      PackageIdentifier
                                      { pkgName = mkPackageName "warp"
                                      , pkgVersion = mkVersion [3, 2, 25]
                                      }
                                    , pmTreeKey =
                                      TreeKey
                                      (BlobKey
                                        (decodeSHA
                                          "f808e075811b002563d24c393ce115be826bb66a317d38da22c513ee42b7443a")
                                        (FileSize 5103))
                                    }))
            ]
