{-# LANGUAGE OverloadedStrings #-}

module Application
  ( getIndexAction
  , getUsersAction
  , getPaymentsAction
  , addUserAction
  , deleteUserAction
  , insertPaymentAction

  , signIn
  , checkConnection
  , signOut
  ) where

import Web.Scotty

import Network.HTTP.Types.Status (badRequest400)

import Database.Persist

import Control.Monad.IO.Class (liftIO)

import Data.Text (Text)
import qualified Data.Text as T
import Data.String (fromString)
import qualified Data.Text.Lazy as TL

import qualified LoginSession

import qualified Secure

import Model.Database (runDb)
import Model.User
import Model.Payment

import View.Page (page)

getIndexAction :: ActionM ()
getIndexAction =
  Secure.loggedAction (\_ ->
    html $ page
  )

getUsersAction :: ActionM ()
getUsersAction = do
  users <- liftIO $ runDb getUsers
  html . fromString . show $ users

getPaymentsAction :: ActionM ()
getPaymentsAction = do
  payments <- liftIO $ runDb getPayments
  json payments

addUserAction :: Text -> Text -> ActionM ()
addUserAction email name = do
  _ <- liftIO . runDb $ insertUser email name
  html "Ok"

deleteUserAction :: Text -> ActionM ()
deleteUserAction email = do
  _ <- liftIO . runDb $ deleteUser email
  html "Ok"

insertPaymentAction :: Text -> Text -> Int -> ActionM ()
insertPaymentAction email name cost = do
  maybeUser <- liftIO . runDb $ getUser email
  case maybeUser of
    Just user -> do
      _ <- liftIO . runDb $ insertPayment (entityKey user) name cost
      return ()
    Nothing -> do
      status badRequest400
      html "Not found"

signIn :: Text -> ActionM ()
signIn login = do
  LoginSession.put login
  html "Ok"

checkConnection :: ActionM ()
checkConnection = do
  maybeLogin <- LoginSession.get
  case maybeLogin of
    Just login ->
      html . TL.fromStrict $
        T.intercalate
          " "
          [ "You are connected with the following login:"
          , login
          ]
    Nothing -> do
      status badRequest400
      html "You are not connected"

signOut :: ActionM ()
signOut = do
  LoginSession.delete
  html "Ok"