module CradleSpec where

import Control.Applicative
import Cradle
import Data.List (isPrefixOf)
import Expectation
import System.FilePath (addTrailingPathSeparator)
import Test.Hspec
import Types

spec :: Spec
spec = do
    describe "findCradle" $ do
        it "returns the current directory" $ do
            withDirectory_ "/" $ do
                res <- findCradle Nothing "7.4.1"
                res `shouldBe` Cradle {
                    cradleCurrentDir = "/"
                  , cradleCabalDir = Nothing
                  , cradleCabalFile = Nothing
                  , cradlePackageConf = Nothing
                  }

        it "finds a cabal file" $ do
            withDirectory "test/data/subdir1/subdir2" $ \dir -> do
                res <- relativeCradle dir <$> findCradle Nothing "7.4.1"
                res `shouldBe` Cradle {
                    cradleCurrentDir = "test/data/subdir1/subdir2"
                  , cradleCabalDir = Just "test/data"
                  , cradleCabalFile = Just "test/data/cabalapi.cabal"
                  , cradlePackageConf = Nothing
                  }

        it "finds a sandbox" $ do
            withDirectory "test/data/subdir1/subdir2" $ \dir -> do
                res <- relativeCradle dir <$> findCradle Nothing "7.6.2"
                res `shouldBe` Cradle {
                    cradleCurrentDir = "test/data/subdir1/subdir2"
                  , cradleCabalDir = Just "test/data"
                  , cradleCabalFile = Just "test/data/cabalapi.cabal"
                  , cradlePackageConf = Just "test/data/cabal-dev/packages-7.6.2.conf"
                  }

        it "finds a sandbox if exists" $ do
            withDirectory "/" $  \dir -> do
                res <- relativeCradle dir <$> findCradle (Just $ addTrailingPathSeparator dir ++ "test/data/cabal-dev") "7.6.2"
                res `shouldBe` Cradle {
                    cradleCurrentDir = "/"
                  , cradleCabalDir = Nothing
                  , cradleCabalFile = Nothing
                  , cradlePackageConf = Just "test/data/cabal-dev/packages-7.6.2.conf"
                  }

relativeCradle :: FilePath -> Cradle -> Cradle
relativeCradle dir cradle = Cradle {
    cradleCurrentDir  = toRelativeDir dir  $  cradleCurrentDir  cradle
  , cradleCabalDir    = toRelativeDir dir <$> cradleCabalDir    cradle
  , cradleCabalFile   = toRelativeDir dir <$> cradleCabalFile   cradle
  , cradlePackageConf = toRelativeDir dir <$> cradlePackageConf cradle
  }


toRelativeDir :: FilePath -> FilePath -> FilePath
toRelativeDir dir file
  | dir' `isPrefixOf` file = drop len file
  | otherwise              = file
  where
    dir' = addTrailingPathSeparator dir
    len = length dir'