{-# LANGUAGE OverloadedStrings #-}

module Mail
  ( sendMail
  ) where

import Data.Text (Text)
import qualified Data.Text as T

import Control.Exception (SomeException, try)

import Network.Email.Sendmail (sendmail)

import Utils.Either (mapLeft)

sendMail :: [Text] -> Text -> Text -> IO (Either Text ())
sendMail mailTo subject message =
  let from = Just "no-reply@leboncoin-listener.com"
  in  safeSendMail from (map T.unpack $ mailTo) (T.unpack $ makeBody subject message)

makeBody :: Text -> Text -> Text
makeBody subject message =
  T.concat
    [ "Subject: "
    , subject
    , "\n\n"
    , message
    ]

safeSendMail :: Maybe String -> [String] -> String -> IO (Either Text ())
safeSendMail from to body =
  mapLeft (T.pack . show) <$> (try (sendmail from to body) :: IO (Either SomeException ()))