module Web.VKHS.API.Base
    ( api
    , envcall
    )  where

import Control.Monad ()
import Control.Monad.Error ()
import Control.Monad.Writer
import Control.Monad.Trans ()

import Data.Label
import qualified Data.ByteString.UTF8 as U
import qualified Data.ByteString as BS

import Network.CURL730

import Network.Protocol.Http ()
import Network.Protocol.Uri
import Network.Protocol.Uri.Query ()

import Text.Printf

import Web.VKHS.Types
import Web.VKHS.Curl

envcall :: String -> Env CallEnv
envcall at = mkEnv (CallEnv at)

-- | Invoke the request. Return answer (normally, string representation of
-- JSON data). See documentation:
--
-- <http://vk.com/developers.php?oid=-1&p=%D0%9E%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5_%D0%BC%D0%B5%D1%82%D0%BE%D0%B4%D0%BE%D0%B2_API>
api :: Env CallEnv
    -- ^ the VKHS environment
    -> String
    -- ^ API method name
    -> [(String, String)]
    -- ^ API method parameters (name-value pairs)
    -> IO (Either String BS.ByteString)
api e mn mp =
  let uri = showUri $ (\f -> f $ toUri $ printf "https://api.vk.com/method/%s" mn) $
              set query $ bw params (("access_token",(access_token . sub) e):mp)
  in vk_curl_payload e (tell [CURLOPT_URL uri])