{-# LANGUAGE QuasiQuotes, TemplateHaskell, TypeFamilies, OverloadedStrings, ViewPatterns #-}
module TKYProf
  ( TKYProf (..)
  , Route (..)
  , resourcesTKYProf
  , Handler
  , Widget
  , module Yesod.Core
  , module Settings
  , module StaticFiles
  , module Model
  , module Control.Monad.STM
  , StaticRoute
  , lift
  ) where

import Control.Monad (unless)
import Control.Monad.STM (STM, atomically)
import Control.Monad.Trans.Class (lift)
import Model
import Settings (hamletFile, luciusFile, juliusFile, widgetFile)
import StaticFiles
import System.Directory
import System.FilePath ((</>))
import Yesod.Core hiding (lift)
import Yesod.Static
import qualified Data.ByteString.Lazy as L
import qualified Data.Text as T
import qualified Settings

-- | The site argument for your application. This can be a good place to
-- keep settings and values requiring initialization before your application
-- starts running, such as database connections. Every handler will have
-- access to the data present here.
data TKYProf = TKYProf
  { getStatic  :: Static -- ^ Settings for static file serving.
  , getReports :: Reports
  }

-- This is where we define all of the routes in our application. For a full
-- explanation of the syntax, please see:
-- http://docs.yesodweb.com/book/web-routes-quasi/
--
-- This function does three things:
--
-- * Creates the route datatype TKYProfRoute. Every valid URL in your
--   application can be represented as a value of this type.
-- * Creates the associated type:
--       type instance Route TKYProf = TKYProfRoute
-- * Creates the value resourcesTKYProf which contains information on the
--   resources declared below. This is used in Controller.hs by the call to
--   mkYesodDispatch
--
-- What this function does *not* do is create a YesodSite instance for
-- TKYProf. Creating that instance requires all of the handler functions
-- for our application to be in scope. However, the handler functions
-- usually require access to the TKYProfRoute datatype. Therefore, we
-- split these actions into two functions and place them in separate files.
mkYesodData "TKYProf" $(parseRoutesFile "config/routes")

-- Please see the documentation for the Yesod typeclass. There are a number
-- of settings which can be configured by overriding methods here.
instance Yesod TKYProf where
  approot = ApprootRelative

  defaultLayout widget = do
    mmsg <- getMessage
    (title, bcs) <- breadcrumbs
    pc <- widgetToPageContent $ do
      $(Settings.widgetFile "header")
      widget
      toWidget $(Settings.luciusFile "templates/default-layout.lucius")
    withUrlRenderer $(Settings.hamletFile "templates/default-layout.hamlet")

  -- This function creates static content files in the static folder
  -- and names them based on a hash of their content. This allows
  -- expiration dates to be set far in the future without worry of
  -- users receiving stale content.
  addStaticContent ext' _ content = do
    let fn = base64md5 content ++ '.' : T.unpack ext'
    let statictmp = Settings.staticdir </> "tmp/"
    liftIO $ createDirectoryIfMissing True statictmp
    let fn' = statictmp ++ fn
    exists <- liftIO $ doesFileExist fn'
    unless exists $ liftIO $ L.writeFile fn' content
    return $ Just $ Right (StaticR $ StaticRoute ["tmp", T.pack fn] [], [])

  maximumContentLength _ _ = Just $ 20*1024*1024

instance YesodBreadcrumbs TKYProf where
  breadcrumb HomeR                   = return ("Home", Nothing)
  breadcrumb ReportsR                = return ("Reports", Just HomeR)
  breadcrumb (ReportsIdTimeR rid _)  = return ("Report #" `T.append` T.pack (show rid), Just ReportsR)
  breadcrumb (ReportsIdAllocR rid _) = return ("Report #" `T.append` T.pack (show rid), Just ReportsR)
  breadcrumb _                       = return ("Not found", Just HomeR)