{-# LANGUAGE OverloadedStrings #-}

module Main where

import           Control.Concurrent
import           Control.Monad              (forM_)
import           Control.Monad.IO.Class
import           Control.Monad.State.Class
import           Control.Monad.State.Strict (evalStateT)
import qualified Network.HTTP.Client        as HTTP
import           System.Random

import           Hash2Pub.PostService       (Hashtag, clientPublishPost)

-- placeholder post data definition

tagsToPostTo = [ "JustSomeTag", "WantAnotherTag234", "HereWeGoAgain", "Oyä", "通信端末" ]

knownRelays :: [(String, Int)]
knownRelays =
  [ ("animalliberation.social", 3342)
  , ("hostux.social", 3343)
  , ("social.diskseven.com", 3344)
  , ("social.imirhil.fr", 3345)
  ]

main :: IO ()
main = do
    -- initialise HTTP manager
    httpMan <- HTTP.newManager HTTP.defaultManagerSettings
    -- initialise RNG
    let initRGen = mkStdGen 12
    -- cycle through tags and post to a random instance
    evalStateT (forM_ (cycle tagsToPostTo) $ publishPostRandom httpMan) initRGen
    -- wait for a specified time

publishPostRandom :: (RandomGen g, MonadIO m, MonadState g m) => HTTP.Manager -> Hashtag -> m ()
publishPostRandom httpman tag = do
    index <- state $ randomR (0, length knownRelays - 1)
    let (pubHost, pubPort) = knownRelays !! index
    _ <- liftIO . forkIO $ do
        postResult <- liftIO $ clientPublishPost httpman pubHost pubPort ("foobar #" <> tag)
        either putStrLn (const $ pure ()) postResult
    liftIO $ threadDelay 500