module StrongPath.FilePathTest where

import Data.Maybe (fromJust)
import StrongPath.FilePath
import StrongPath.Internal
import qualified System.FilePath as FP
import qualified System.FilePath.Posix as FPP
import qualified System.FilePath.Windows as FPW
import Test.Tasty.Hspec
import Test.Utils

spec_StrongPathFilePath :: Spec
spec_StrongPathFilePath = do
  describe "Parsing FilePath into StrongPath" $ do
    let runTest fpToParseIntoExpectedFp parser fpToParse =
          let expectedFp = fpToParseIntoExpectedFp fpToParse
           in it (fpToParse ++ " should parse into " ++ expectedFp) $ do
                let sp = fromJust $ parser fpToParse
                toFilePath sp `shouldBe` expectedFp
    let runTestRel fpToParseIntoExpectedFp parser fpToParse expectedNumParentDirs =
          let expectedFp = fpToParseIntoExpectedFp fpToParse
           in it (fpToParse ++ " should parse into " ++ expectedFp) $ do
                let sp = fromJust $ parser fpToParse
                toFilePath sp `shouldBe` expectedFp
                relPathNumParentDirs sp `shouldBe` expectedNumParentDirs

    describe "into standard System" $ do
      describe "into base Rel" $ do
        describe "captures one or multiple ../ at start of relative path" $ do
          let test = runTestRel id
          test parseRelDir (posixToSystemFp "../../a/b/") 2
          test parseRelDir (posixToSystemFp "../") 1
          test parseRelDir (posixToSystemFp "../../") 2
          test parseRelDir (posixToSystemFp "./") 0
          test parseRelFile (posixToSystemFp "../a/b.txt") 1
        describe "can parse from system FilePath" $ do
          let test = runTestRel id
          test parseRelDir (posixToSystemFp "../a/b/") 1
          test parseRelDir (posixToSystemFp "a/b/") 0
          test parseRelFile (posixToSystemFp "../a/b.txt") 1
          test parseRelFile (posixToSystemFp "a/b.txt") 0
        describe "can parse from posix FilePath" $ do
          let test = runTestRel posixToSystemFp
          test parseRelDir "../a/b/" 1
          test parseRelDir "a/b/" 0
          test parseRelFile "../a/b.txt" 1
          test parseRelFile "a/b.txt" 0
      describe "into base Abs" $ do
        describe "can parse from system FilePath" $ do
          let test = runTest id
          test parseAbsDir (systemFpRoot FP.</> posixToSystemFp "a/b/")
          test parseAbsFile (systemFpRoot FP.</> posixToSystemFp "a/b.txt")
        describe "can parse from FilePath with system root and posix separators" $ do
          let test = runTest posixToSystemFp
          test parseAbsDir (systemFpRoot FP.</> "a/b/")
          test parseAbsFile (systemFpRoot FP.</> "a/b.txt")

    describe "into standard Windows" $ do
      describe "into base Rel" $ do
        describe "captures one or multiple ../ at start of relative path" $ do
          let test = runTestRel posixToWindowsFp
          test parseRelDirW (posixToSystemFp "../../a/b/") 2
          test parseRelFileW (posixToSystemFp "../a/b.txt") 1
        describe "can parse from windows FilePath" $ do
          let test = runTestRel id
          test parseRelDirW "..\\a\\b\\" 1
          test parseRelDirW "a\\b\\" 0
          test parseRelFileW "..\\a\\b.txt" 1
          test parseRelFileW "..\\..\\a\\b.txt" 2
          test parseRelFileW "a\\b.txt" 0
        describe "can parse from posix FilePath" $ do
          let test = runTestRel posixToWindowsFp
          test parseRelDirW "../a/b/" 1
          test parseRelDirW "a/b/" 0
          test parseRelFileW "../a/b.txt" 1
          test parseRelFileW "a/b.txt" 0
      describe "into base Abs" $ do
        describe "can parse from windows FilePath" $ do
          let test = runTest id
          test parseAbsDirW "C:\\a\\b\\"
          test parseAbsFileW "C:\\a\\b.txt"
        describe "can parse from FilePath with windows root and Posix separators" $ do
          let test = runTest posixToWindowsFp
          test parseAbsDirW "C:\\a/b/"
          test parseAbsFileW "C:\\a/b.txt"

    describe "into standard Posix" $ do
      describe "into base Rel" $ do
        describe "captures one or multiple ../ at start of relative path" $ do
          let test = runTestRel id
          test parseRelDirP "../../a/b/" 2
          test parseRelFileP "../a/b.txt" 1
        describe "can parse from posix FilePath" $ do
          let test = runTestRel id
          test parseRelDirP "../a/b/" 1
          test parseRelDirP "a/b/" 0
          test parseRelFileP "a/b.txt" 0
      describe "into base Abs" $ do
        describe "can parse from posix FilePath" $ do
          let test = runTest id
          test parseAbsDirP "/a/b/"
          test parseAbsFileP "/a/b.txt"

  describe "toFilePath correctly transforms StrongPath into FilePath" $ do
    let test msp efp =
          it ("toFilePath (" ++ show msp ++ ") = " ++ efp) $
            toFilePath (fromJust msp) `shouldBe` efp
    -- TODO: Add more tests.
    test (parseRelDir $ posixToSystemFp "../") (posixToSystemFp "../")
    test (parseRelDir $ posixToSystemFp "a/b") (posixToSystemFp "a/b/")
    test (parseRelFile $ posixToSystemFp "../../foo.txt") (posixToSystemFp "../../foo.txt")
    test (parseRelDirW "../") "..\\"
    test (parseRelDirP "../") "../"

systemSpRoot :: Path' Abs Dir'
systemSpRoot = fromJust $ parseAbsDir systemFpRoot