module Foundation where

import Prelude
import Yesod
import Yesod.Static
import Yesod.Default.Config2
import Yesod.Default.Util (addStaticContentExternal)
import Network.HTTP.Client.Conduit (Manager, HasHttpManager (getHttpManager))
import qualified Settings
import Settings.Development (development)
import qualified Database.Persist
import Database.Persist.Sql -- (ConnectionPool, runSqlPool)
import Settings.StaticFiles
import Settings
import Model
import Text.Jasmine (minifym)
import Text.Hamlet (hamletFile)
import Yesod.Core.Types
-- costom imports
import Data.Text
import Data.Maybe
import Helper

-- | 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 App = App
    { appSettings    :: AppSettings
    , appStatic      :: Static -- ^ Settings for static file serving.
    , appConnPool    :: ConnectionPool -- ^ Database connection pool.
    , appHttpManager :: Manager
    , appLogger      :: Logger
    }

instance HasHttpManager App where
    getHttpManager = appHttpManager

-- Set up i18n messages. See the message folder.
mkMessage "App" "messages" "en"

-- This is where we define all of the routes in our application. For a full
-- explanation of the syntax, please see:
-- http://www.yesodweb.com/book/routing-and-handlers
--
-- Note that this is really half the story; in Application.hs, mkYesodDispatch
-- generates the rest of the code. Please see the linked documentation for an
-- explanation for this split.
mkYesodData "App" $(parseRoutesFile "config/routes")

type Form x = Html -> MForm (HandlerT App IO) (FormResult x, Widget)

-- Please see the documentation for the Yesod typeclass. There are a number
-- of settings which can be configured by overriding methods here.
instance Yesod App where
    approot = ApprootMaster $ appRoot . appSettings

    -- change maximum content length
    maximumContentLength _ _ = Just $ 1024 ^ 5

    -- Store session data on the client in encrypted cookies,
    -- default session idle timeout is 120 minutes
    makeSessionBackend _ = fmap Just $ defaultClientSessionBackend
        120    -- timeout in minutes
        "config/client_session_key.aes"

    defaultLayout widget = do
        master <- getYesod
        mmsg <- getMessage
        msu <- lookupSession "userId"
        username <- case msu of 
          Just a -> do
            uId <- return $ getUserIdFromText a
            user <- runDB $ getJust uId
            return $ userName user
          Nothing -> do
            return ("" :: Text)
        slug <- case msu of
          Just a -> do
            uId <- return $ getUserIdFromText a
            user <- runDB $ getJust uId
            return $ userSlug user
          Nothing -> do
            return ("" :: Text)
        block <- return $ appSignupBlocked $ appSettings master

        -- We break up the default layout into two components:
        -- default-layout is the contents of the body tag, and
        -- default-layout-wrapper is the entire page. Since the final
        -- value passed to hamletToRepHtml cannot be a widget, this allows
        -- you to use normal widget features in default-layout.

        pc <- widgetToPageContent $ do
            $(combineStylesheets 'StaticR
                [ css_normalize_css
                , css_bootstrap_css
                ])
            $(widgetFile "default-layout")
        withUrlRenderer $(hamletFile "templates/default-layout-wrapper.hamlet")

    -- This is done to provide an optimization for serving static files from
    -- a separate domain. Please see the staticRoot setting in Settings.hs
    -- urlRenderOverride y (StaticR s) =
    --     Just $ uncurry (joinPath y (Settings.staticRoot $ settings y)) $ renderRoute s
    -- urlRenderOverride _ _ = Nothing

    -- The page to be redirected to when authentication is required.
    -- authRoute _ = Just $ AuthR LoginR

    -- 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 mime content = do
        master <- getYesod
        let staticDir = appStaticDir $ appSettings master
        addStaticContentExternal
            minifym
            genFileName
            staticDir
            (StaticR . flip StaticRoute [])
            ext
            mime
            content
      where
        -- Generate a unique filename based on the content itself
        genFileName lbs = "autogen-" ++ base64md5 lbs

    -- Place Javascript at bottom of the body tag so the rest of the page loads first
    jsLoader _ = BottomOfBody

    -- What messages should be logged. The following includes all messages when
    -- in development, and warnings and errors in production.
    shouldLog app _source level =
        appShouldLogAll (appSettings app)
            || level == LevelWarn
            || level == LevelError

    makeLogger = return . appLogger

-- How to run database actions.
instance YesodPersist App where
    type YesodPersistBackend App = SqlBackend
    runDB action = do
        master <- getYesod
        runSqlPool action $ appConnPool master
instance YesodPersistRunner App where
    getDBRunner = defaultGetDBRunner appConnPool

-- instance YesodAuth App where
--    type AuthId App = UserId

    -- Where to send a user after successful login
--    loginDest _ = HomeR
    -- Where to send a user after logout
--    logoutDest _ = HomeR

--    getAuthId creds = runDB $ do
--        x <- getBy $ UniqueUser $ credsIdent creds
--        case x of
--            Just (Entity uid _) -> return $ Just uid
--            Nothing -> do
--                fmap Just $ insert User
--                    { userIdent = credsIdent creds
--                    , userPassword = Nothing
--                    }

    -- You can add other plugins like BrowserID, email or OAuth here
--    authPlugins _ = [authBrowserId def]

--    authHttpManager = httpManager

-- This instance is required to use forms. You can modify renderMessage to
-- achieve customized and internationalized form validation messages.
instance RenderMessage App FormMessage where
    renderMessage _ _ = defaultFormMessage

-- | Get the 'Extra' value, used to hold data from the settings.yml file.
-- getExtra :: Handler Extra
-- getExtra = fmap (appExtra . settings) getYesod

-- Note: previous versions of the scaffolding included a deliver function to
-- send emails. Unfortunately, there are too many different options for us to
-- give a reasonable default. Instead, the information is available on the
-- wiki:
--
-- https://github.com/yesodweb/yesod/wiki/Sending-email