module HEyefi.App where

import           Control.Concurrent.STM (
    atomically
  , writeTVar
  , readTVar )
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import           Data.Maybe (isJust, fromJust, isNothing)
import           HEyefi.Config (runWithConfig)
import           HEyefi.Log (logDebug)
import           HEyefi.Prelude
import           HEyefi.Soap (handleSoapAction, soapAction)
import           HEyefi.Types (SharedConfig, HEyefiApplication)
import           HEyefi.UploadPhoto (handleUpload)
import           Network.Wai (
    Application
  , Request
  , pathInfo
  , requestBody
  , requestMethod
  , requestHeaders )

app :: SharedConfig -> Application
app sharedConfig req f = do
  config <- atomically (readTVar sharedConfig)
  body <- getWholeRequestBody req
  (result, config') <- runWithConfig config (do
                  logDebug (tshow (pathInfo req))
                  logDebug (tshow (requestHeaders req))
                  dispatchRequest (BL.fromStrict body) req f)
  atomically (writeTVar sharedConfig config')
  return result

dispatchRequest :: BL.ByteString -> HEyefiApplication
dispatchRequest body req f
  | requestMethod req == "POST" &&
    pathInfo req == ["api","soap","eyefilm","v1","upload"] &&
    isNothing (soapAction req) =
      handleUpload body req f
dispatchRequest body req f
  | requestMethod req == "POST" &&
    isJust (soapAction req) =
      handleSoapAction (fromJust (soapAction req)) body req f
dispatchRequest _ _ _ = terror didNotMatchDispatch

getWholeRequestBody :: Request -> IO B.ByteString
getWholeRequestBody request = do
  r <- requestBody request
  if r == B.empty
    then return B.empty
    else do
     rest <- getWholeRequestBody request
     return (B.append r rest)