{-# LANGUAGE OverloadedStrings #-}
module Types(CArray, Page(..), Application(..), visitedURLs) where

import System.Directory (getCurrentDirectory) -- default referer URI
import SpeechStyle (SpeechStyle)
import Data.CSS.Preprocessor.Conditions (ConditionalStyles, conditionalStyles)
import Data.CSS.Preprocessor.Text (TextStyle)
import Text.XML
import qualified Data.Map.Strict as M
import Network.URI
import Network.URI.Fetch (Application(..))
import Data.Trie.Text (Trie)
import Control.Concurrent.MVar

import Foreign.Ptr
import Foreign.StablePtr

type CArray a = Ptr a

data Page = Page {
    url :: URI,
    css :: ConditionalStyles (TextStyle SpeechStyle),
    html :: Document,
    pageTitle :: String,
    pageMIME :: String,
    apps :: [Application],
    backStack :: [(String, URI)],
    forwardStack :: [(String, URI)]
}

visitedURLs :: IO (MVar (Trie ()))
visitedURLs = newEmptyMVar

foreign export ccall c_initialReferer :: IO (StablePtr Page)

c_initialReferer = do
    cwd <- getCurrentDirectory
    newStablePtr $ Page {
        -- Default to URIs being relative to CWD.
        url = URI {uriScheme = "file:", uriPath = cwd,
            uriAuthority = Nothing, uriQuery = "", uriFragment = ""},
        -- Blank values:
        css = conditionalStyles nullURI "temp",
        html = Document {
            documentPrologue = Prologue [] Nothing [],
            documentRoot = Element "temp" M.empty [],
            documentEpilogue = []
        },
        pageTitle = "", pageMIME = "", apps = [],
        backStack = [], forwardStack = []
    }

foreign export ccall c_freePage :: StablePtr Page -> IO ()

c_freePage = freeStablePtr