module Handler.Utils.Table.Cells where

import Import

import Data.Monoid (Any(..))
import Control.Monad.Writer.Class (MonadWriter(..))
import Control.Monad.Trans.Writer (WriterT)

import Utils.Lens
import Handler.Utils


type CourseLink = (TermId, SchoolId, CourseShorthand) -- TODO: Refactor with WithHoles !

--------------------
-- Special cells

tellCell :: (Monoid a, IsDBTable m a) => a -> DBCell m a -> DBCell m a
tellCell = flip mappend . writerCell . tell

cellTell :: (Monoid a, IsDBTable m a) => DBCell m a -> a -> DBCell m a
cellTell = flip tellCell

indicatorCell :: IsDBTable m Any => DBCell m Any -- For dbTables that return a Bool to indicate content
indicatorCell = writerCell . tell $ Any True

writerCell :: IsDBTable m w => WriterT w m () -> DBCell m w
writerCell act = mempty & cellContents %~ (<* act)

-- Datatype cells
timeCell :: IsDBTable m a => UTCTime -> DBCell m a
timeCell t = cell $ formatTime SelFormatDateTime t >>= toWidget

userCell :: IsDBTable m a => Text -> Text -> DBCell m a
userCell displayName surname = cell $ nameWidget displayName surname

cellHasUser :: (IsDBTable m a, HasUser c) => c -> DBCell m a
cellHasUser = liftA2 userCell (view _userDisplayName) (view _userSurname)

cellHasUserLink :: (IsDBTable m a, HasEntity u User) => (CryptoUUIDUser -> Route UniWorX) -> u -> DBCell m a
-- cellHasUserLink toLink user =
--   let uid   = user ^. hasEntityUser . _entityKey
--       nWdgt = nameWidget (user ^. hasEntityUser . _entityVal . _userDisplayName) (user ^. hasEntityUser .  _entityVal . _userSurname)
--   in  anchorCellM (toLink <$> encrypt uid) nWdgt
cellHasUserLink toLink user =
  let userEntity = user ^. hasEntityUser
      uid   = userEntity ^. _entityKey
      nWdgt = nameWidget (userEntity ^. _entityVal . _userDisplayName) (userEntity ^.  _entityVal . _userSurname)
  in  anchorCellM (toLink <$> encrypt uid) nWdgt


cellHasMatrikelnummer :: (IsDBTable m a, HasUser c) => c -> DBCell m a
cellHasMatrikelnummer = maybe mempty textCell . view _userMatrikelnummer

-- Just for documentation purposes; inline this code instead:
maybeTimeCell :: IsDBTable m a => Maybe UTCTime -> DBCell m a
maybeTimeCell = maybe mempty timeCell

numCell :: (IsDBTable m a, Num b, DisplayAble b) => b -> DBCell m a
numCell = textCell . display

int64Cell :: (IsDBTable m a) => Int64-> DBCell m a
int64Cell = numCell

termCell :: IsDBTable m a => TermId -> DBCell m a
termCell tid = anchorCell link name
  where
    link = TermCourseListR tid
    name = text2widget $ display tid

termCellCL :: IsDBTable m a => CourseLink -> DBCell m a
termCellCL (tid,_,_) = termCell tid

schoolCell :: IsDBTable m a => Maybe TermId -> SchoolId -> DBCell m a
schoolCell (Just tid) ssh  = anchorCell link name
  where
    link = TermSchoolCourseListR tid ssh
    name = text2widget $ display ssh
schoolCell Nothing ssh  = anchorCell link name
  where
    link = SchoolShowR ssh
    name = text2widget $ display ssh

schoolCellCL :: IsDBTable m a => CourseLink -> DBCell m a
schoolCellCL (tid,ssh,_) = schoolCell (Just tid) ssh

courseCellCL :: IsDBTable m a => CourseLink -> DBCell m a
courseCellCL (tid,ssh,csh) = anchorCell link name
  where
    link = CourseR tid ssh csh CShowR
    name = citext2widget csh

courseCell :: IsDBTable m a => Course -> DBCell m a
courseCell Course{..} = anchorCell link name `mappend` desc
  where
    link = CourseR courseTerm courseSchool courseShorthand CShowR
    name = citext2widget courseName
    desc = case courseDescription of
            Nothing      -> mempty
            (Just descr) -> cell [whamlet|
              $newline never
              <div>
                ^{modal "Beschreibung" (Right $ toWidget descr)}
              |]

sheetCell :: IsDBTable m a => CourseLink -> SheetName -> DBCell m a
sheetCell crse shn =
  let tid = crse ^. _1
      ssh = crse ^. _2
      csh = crse ^. _3
      link= CSheetR tid ssh csh shn SShowR
  in anchorCell link $ display2widget shn

submissionCell :: IsDBTable m a => CourseLink -> SheetName -> SubmissionId -> DBCell m a
submissionCell crse shn sid =
  let tid = crse ^. _1
      ssh = crse ^. _2
      csh = crse ^. _3
      mkCid = encrypt sid
      mkRoute cid = CSubmissionR tid ssh csh shn cid SubShowR
      mkText      = display2widget
  in anchorCellM' mkCid mkRoute mkText

correctorStateCell :: IsDBTable m a => SheetCorrector -> DBCell m a
correctorStateCell sc =
  i18nCell $ sheetCorrectorState sc

correctorLoadCell :: IsDBTable m a => SheetCorrector -> DBCell m a
correctorLoadCell sc =
  i18nCell $ sheetCorrectorLoad sc


commentCell :: IsDBTable m a => Maybe (Route UniWorX) -> DBCell m a
commentCell Nothing     = mempty
commentCell (Just link) = anchorCell link icon
  where
    icon = commentWidget True