{-# LANGUAGE FlexibleContexts, CPP #-}

module TestTime(tests) where
import Test.HUnit
import Database.HDBC
import TestUtils
import Control.Exception
import Data.Time (UTCTime, Day, NominalDiffTime)
import Data.Time.LocalTime
import Data.Time.Clock.POSIX
import Data.Maybe
import Data.Convertible
import SpecificDB
#ifdef MIN_TIME_15
import Data.Time (parseTimeM, defaultTimeLocale)
#else
import Data.Time (parseTime)
import System.Locale(defaultTimeLocale)
#endif
import Database.HDBC.Locale (iso8601DateFormat)
import qualified System.Time as ST

instance Eq ZonedTime where
    a == b = zonedTimeToUTC a == zonedTimeToUTC b

testZonedTime :: ZonedTime
testZonedTime = fromJust $ parseTime' defaultTimeLocale (iso8601DateFormat (Just "%T %z"))
                 "1989-08-01 15:33:01 -0500"

testZonedTimeFrac :: ZonedTime
testZonedTimeFrac = fromJust $ parseTime' defaultTimeLocale (iso8601DateFormat (Just "%T%Q %z"))
                    "1989-08-01 15:33:01.536 -0500"


rowdata t = [[SqlInt32 100, toSql t, SqlNull]]

testDTType :: (Convertible SqlValue a, Show b, Eq b) =>
    a
    -> (a -> SqlValue)
    -> (a -> b)
    -> Test
testDTType inputdata convToSqlValue toComparable = dbTestCase $ \dbh ->
    do run dbh ("CREATE TABLE hdbctesttime (testid INTEGER PRIMARY KEY NOT NULL, testvalue " ++ dateTimeTypeOfSqlValue value ++ ")") []
       commit dbh
       finally (testIt dbh) (do commit dbh
                                run dbh "DROP TABLE hdbctesttime" []
                                commit dbh
                            )
    where testIt dbh =
              do run dbh "INSERT INTO hdbctesttime (testid, testvalue) VALUES (?, ?)"
                     [iToSql 5, value]
                 commit dbh
                 r <- quickQuery' dbh "SELECT testid, testvalue FROM hdbctesttime" []
                 case r of
                   [[testidsv, testvaluesv]] -> 
                       do assertEqual "testid" (5::Int) (fromSql testidsv)
                          assertEqual "testvalue"
                                (toComparable inputdata)
                                (toComparable$ fromSql testvaluesv)
          value = convToSqlValue inputdata

mkTest label inputdata convfunc toComparable =
    TestLabel label (testDTType inputdata convfunc toComparable)

tests = TestList $
    ((TestLabel "Non-frac" $ testIt testZonedTime) :
     if supportsFracTime then [TestLabel "Frac" $ testIt testZonedTimeFrac] else [])

testIt baseZonedTime =
  TestList [ mkTest "Day"            baseDay            toSql      id
           , mkTest "TimeOfDay"      baseTimeOfDay      toSql      id
           , mkTest "ZonedTimeOfDay" baseZonedTimeOfDay toSql      id
           , mkTest "LocalTime"      baseLocalTime      toSql      id
           , mkTest "ZonedTime"      baseZonedTime      toSql      id
           , mkTest "UTCTime"        baseUTCTime        toSql      id
           , mkTest "DiffTime"       baseDiffTime       toSql      id
           , mkTest "POSIXTime"      basePOSIXTime      posixToSql id
           , mkTest "ClockTime"      baseClockTime      toSql      id
           , mkTest "CalendarTime"   baseCalendarTime   toSql      ST.toClockTime
           , mkTest "TimeDiff"       baseTimeDiff       toSql      id
           ]
 where
      baseDay :: Day
      baseDay = localDay baseLocalTime

      baseTimeOfDay :: TimeOfDay
      baseTimeOfDay = localTimeOfDay baseLocalTime

      baseZonedTimeOfDay :: (TimeOfDay, TimeZone)
      baseZonedTimeOfDay = fromSql (SqlZonedTime baseZonedTime)

      baseLocalTime :: LocalTime
      baseLocalTime = zonedTimeToLocalTime baseZonedTime

      baseUTCTime :: UTCTime
      baseUTCTime = convert baseZonedTime

      baseDiffTime :: NominalDiffTime
      baseDiffTime = basePOSIXTime

      basePOSIXTime :: POSIXTime
      basePOSIXTime = convert baseZonedTime

      baseTimeDiff :: ST.TimeDiff
      baseTimeDiff = convert baseDiffTime

      -- No fractional parts for these two

      baseClockTime :: ST.ClockTime
      baseClockTime = convert testZonedTime

      baseCalendarTime :: ST.CalendarTime
      baseCalendarTime = convert testZonedTime

#if MIN_TIME_15
parseTime' = parseTimeM True
#else
parseTime' = parseTime
#endif