module Test.Rebuild(main) where

import Development.Shake
import Test.Type
import Text.Read.Extra
import Control.Monad
import General.GetOpt

data Opt = Timestamp String | Pattern Pat

opts = [Option "" ["timestamp"] (ReqArg (Right . Timestamp) "VALUE") "Value used to detect what has rebuilt when"
       ,Option "" ["pattern"] (ReqArg (fmap Pattern . readEither) "PATTERN")  "Which file rules to use (%>, &?> etc)"]

main = shakeTest test opts $ \args -> do
    let timestamp = concat [x | Timestamp x <- args]
    let p = last $ PatWildcard : [x | Pattern x <- args]
    want ["a.txt"]
    pat p "a.txt" $ \out -> do
        src <- readFile' "b.txt"
        writeFile' out $ src ++ timestamp

    pat p "b.txt" $ \out -> do
        src <- readFile' "c.txt"
        writeFile' out $ src ++ timestamp

test build =
    forM_ [minBound..maxBound :: Pat] $ \pat -> do
        build ["clean"]
        let go arg c b a flags = do
                writeFileChanged "c.txt" c
                build $ ["--timestamp=" ++ arg, "--sleep","--no-reports","--pattern=" ++ show pat] ++ flags
                assertContents "b.txt" b
                assertContents "a.txt" a

        -- check rebuild works
        go "1" "x" "x1" "x11" []
        go "2" "x" "x1" "x11" []
        go "3" "x" "x1" "x13" ["--rebuild=a.*"]
        go "4" "x" "x1" "x13" []
        go "5" "x" "x5" "x55" ["--rebuild=b.*"]
        go "6" "x" "x6" "x66" ["--rebuild"]
        go "7" "x" "x6" "x66" []
        go "8" "y" "y8" "y88" []

        -- check skip works
        go "1" "x" "x1" "x11" []
        go "2" "y" "y2" "x11" ["--skip=a.*"]
        go "3" "y" "y2" "y23" []
        go "4" "z" "y2" "y23" ["--skip=b.*"]
        go "5" "z" "y2" "y23" ["--skip=b.*"]
        go "6" "z" "z6" "z66" []
        go "7" "a" "z6" "z66" ["--skip=c.*"]
        go "8" "a" "z6" "z66" ["--skip=b.*"]
        go "9" "a" "a9" "z66" ["--skip=a.*"]
        go "0" "a" "a9" "a90" []

    {-
        -- check skip-forever works
        -- currently it does not work properly
        go "1" "x" "x1" "x11" []
        go "2" "y" "y2" "x11" ["--skip-forever=a.*"]
        go "3" "y" "y2" "x11" []
        go "4" "z" "z4" "z44" []
    -}