{-# LANGUAGE OverloadedStrings #-}

module Main where

import          Control.Monad

import qualified Data.Text        as T
import qualified Data.Text.IO     as TIO

import           UnliftIO         (liftIO)

import           Discord
import           Discord.Types
import qualified Discord.Requests as R

cmdPrefix :: T.Text
cmdPrefix = "%"

main :: IO ()
main = do
  tok <- TIO.readFile "./auth.secret"
  err <- runDiscord $ def { discordToken = tok
                          , discordOnStart = onDiscordStart
                          , discordOnEnd = liftIO $ putStrLn "Ended"
                          , discordOnEvent = onDiscordEvent
                          , discordOnLog =
                              \s -> TIO.putStrLn s >> TIO.putStrLn ""
                          }
  TIO.putStrLn err

onDiscordStart :: DiscordHandler ()
onDiscordStart = undefined
    
onDiscordEvent :: Event -> DiscordHandler ()
onDiscordEvent (MessageCreate m) = when (not (fromBot m) && isCommand m) $ do
  let content = messageContent m
  let elements = T.words content
  case head elements of
    _ -> unknownCommand m elements
  return ()
onDiscordEvent _ = return ()

fromBot :: Message -> Bool
fromBot = userIsBot . messageAuthor

unknownCommand :: Message -> [Text] -> DiscordHandler ()
unknownCommand  = 

isCommand :: Message ->Bool
isCommand = (cmdPrefix `T.isPrefixOf`) . messageContent