module CradleSpec where

import Control.Applicative
import Data.List (isSuffixOf)
import Language.Haskell.GhcMod.Cradle
import Language.Haskell.GhcMod.Types
import System.Directory (canonicalizePath)
import System.FilePath ((</>), pathSeparator)
import Test.Hspec

import Dir

spec :: Spec
spec = do
    describe "findCradle" $ do
        it "returns the current directory" $ do
            withDirectory_ "/" $ do
                curDir <- stripLastDot <$> canonicalizePath "/"
                res <- findCradle
                res `shouldBe` Cradle {
                    cradleCurrentDir = curDir
                  , cradleRootDir    = curDir
                  , cradleCabalFile  = Nothing
                  , cradlePackageDb  = Nothing
                  , cradlePackages   = []
                  }
        it "finds a cabal file and a sandbox" $ do
            withDirectory "test/data/subdir1/subdir2" $ \dir -> do
                res <- relativeCradle dir <$> findCradle
                res `shouldBe` Cradle {
                    cradleCurrentDir = "test" </> "data" </> "subdir1" </> "subdir2"
                  , cradleRootDir    = "test" </> "data"
                  , cradleCabalFile  = Just ("test" </> "data" </> "cabalapi.cabal")
                  , cradlePackageDb  = Just ("test" </> "data" </> ".cabal-sandbox" </> "/home/me/work/ghc-mod/test/data/.cabal-sandbox/i386-osx-ghc-7.6.3-packages.conf.d")
                  , cradlePackages   = []
                  }
        it "works even if a sandbox config file is broken" $ do
            withDirectory "test/data/broken-sandbox" $ \dir -> do
                res <- relativeCradle dir <$> findCradle
                res `shouldBe` Cradle {
                    cradleCurrentDir = "test" </> "data" </> "broken-sandbox"
                  , cradleRootDir    = "test" </> "data" </> "broken-sandbox"
                  , cradleCabalFile  = Just ("test" </> "data" </> "broken-sandbox" </> "dummy.cabal")
                  , cradlePackageDb  = Nothing
                  , cradlePackages   = []
                  }

    describe "getPackageDbDir" $ do
        it "parses a config file and extracts package db" $ do
            pkgDb <- getPackageDbDir "test/data/cabal.sandbox.config"
            pkgDb `shouldBe` "/home/me/work/ghc-mod/test/data/.cabal-sandbox/i386-osx-ghc-7.6.3-packages.conf.d"

        it "throws an error if a config file is broken" $ do
            getPackageDbDir "test/data/bad.config" `shouldThrow` anyException

    describe "getPackageDbPackages" $ do
        it "find a config file and extracts packages with their ids" $ do
            pkgs <- getPackageDbPackages "test/data/check-packageid"
            pkgs `shouldBe` [("template-haskell", Just "template-haskell-2.8.0.0-32d4f24abdbb6bf41272b183b2e23e9c")]

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

-- Work around GHC 7.2.2 where `canonicalizePath "/"` returns "/.".
stripLastDot :: FilePath -> FilePath
stripLastDot path
  | (pathSeparator:'.':"") `isSuffixOf` path = init path
  | otherwise = path