{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ViewPatterns #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE FlexibleContexts #-}

module Handler.Admin where

import Import
import Handler.Utils
import Jobs

-- import Data.Time
-- import qualified Data.Text as T
-- import Data.Function ((&))
-- import Yesod.Form.Bootstrap3

import Web.PathPieces (showToPathPiece, readFromPathPiece)

import Database.Persist.Sql (fromSqlKey)

-- import Colonnade hiding (fromMaybe)
-- import Yesod.Colonnade

-- import qualified Data.UUID.Cryptographic as UUID

-- BEGIN - Buttons needed only here
data CreateButton = CreateMath | CreateInf  -- Dummy for Example
  deriving (Enum, Eq, Ord, Bounded, Read, Show)

instance PathPiece CreateButton where    -- for displaying the button only, not really for paths
  toPathPiece   = showToPathPiece
  fromPathPiece = readFromPathPiece

instance Button UniWorX CreateButton where
  label CreateMath = [whamlet|Ma<i>thema</i>tik|]
  label CreateInf  = "Informatik"

  cssClass CreateMath = BCInfo
  cssClass CreateInf  = BCPrimary
-- END Button needed here

emailTestForm :: AForm (HandlerT UniWorX IO) (Email, MailLanguages)
emailTestForm = (,)
            <$> areq emailField (fslI MsgMailTestFormEmail) Nothing
            <*> (MailLanguages <$> areq (reorderField appLanguages) (fslI MsgMailTestFormLanguages) Nothing)
            <*  submitButton


getAdminTestR, postAdminTestR :: Handler Html -- Demo Page. Referenzimplementierungen sollte hier gezeigt werden!
getAdminTestR = postAdminTestR
postAdminTestR = do
  ((btnResult, btnWdgt), btnEnctype) <- runFormPost $ identifyForm "buttons" (buttonForm :: Form CreateButton)
  case btnResult of
    (FormSuccess CreateInf)  -> addMessage Info "Informatik-Knopf gedrückt"
    (FormSuccess CreateMath) -> addMessage Warning "Knopf Mathematik erkannt"
    FormMissing -> return ()
    _other -> addMessage Warning "KEIN Knopf erkannt"

  ((emailResult, emailWidget), emailEnctype) <- runFormPost . identifyForm "email" $ renderAForm FormStandard emailTestForm
  case emailResult of 
    (FormSuccess (email, ls)) -> do
      jId <- runDB $ do
        jId <- queueJob $ JobSendTestEmail email ls
        addMessage Success [shamlet|Email-test gestartet (Job ##{tshow (fromSqlKey jId)})|]
        return jId
      writeJobCtl $ JobCtlPerform jId
    FormMissing -> return ()
    (FormFailure errs) -> forM_ errs $ addMessage Error . toHtml
  
  defaultLayout $ do
    -- setTitle "Uni2work Admin Testpage"
    $(widgetFile "adminTest")


getAdminUserR :: CryptoUUIDUser -> Handler Html
getAdminUserR uuid = do
  uid <- decrypt uuid
  User{..} <- runDB $ get404 uid
  defaultLayout $
    [whamlet|
      <h1>TODO
      <h2>Admin Page for User ^{nameWidget userDisplayName userSurname}
    |]