{-# LANGUAGE CPP               #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes       #-}

-- | Settings are centralized, as much as possible, into this file. This
-- includes database connection settings, static file locations, etc.
-- In addition, you can configure a number of different aspects of Yesod
-- by overriding methods in the Yesod typeclass. That instance is
-- declared in the Foundation.hs file.
module Hledger.Web.Settings where

import Data.Default (def)
import Data.Maybe (fromMaybe)
import Data.Text (Text)
import Data.Yaml
import Language.Haskell.TH.Syntax (Q, Exp)
import Text.Hamlet
import Text.Shakespeare.Text (st)
import Yesod.Default.Config
import Yesod.Default.Util

development :: Bool
development =
#if DEVELOPMENT
  True
#else
  False
#endif

production :: Bool
production = not development

hledgerorgurl :: Text
hledgerorgurl = "http://hledger.org"

manualurl :: Text
manualurl = hledgerorgurl <> "hledger.html"

-- | The default IP address to listen on. May be overridden with --host.
defhost :: String
defhost = "127.0.0.1"

-- | The default TCP port to listen on. May be overridden with --port.
defport :: Int
defport = 5000

defbaseurl :: String -> Int -> String
defbaseurl host port =
  if ':' `elem` host then
    "http://[" ++ host ++ "]" ++ if port /= 80 then ":" ++ show port else ""
  else
    "http://" ++ host ++ if port /= 80 then ":" ++ show port else ""

-- Static setting below. Changing these requires a recompile

-- | The location of static files on your system. This is a file system
-- path. The default value works properly with your scaffolded site.
staticDir :: FilePath
staticDir = "static"

-- | The base URL for your static files. As you can see by the default
-- value, this can simply be "static" appended to your application root.
-- A powerful optimization can be serving static files from a separate
-- domain name. This allows you to use a web server optimized for static
-- files, more easily set expires and cache values, and avoid possibly
-- costly transference of cookies on static files. For more information,
-- please see:
--   http://code.google.com/speed/page-speed/docs/request.html#ServeFromCookielessDomain
--
-- If you change the resource pattern for StaticR in Foundation.hs, you will
-- have to make a corresponding change here.
--
-- To see how this value is used, see urlRenderOverride in Foundation.hs
staticRoot :: AppConfig DefaultEnv Extra -> Text
staticRoot conf = fromMaybe [st|#{appRoot conf}/static|] . extraStaticRoot $ appExtra conf

-- | Settings for 'widgetFile', such as which template languages to support and
-- default Hamlet settings.
widgetFileSettings :: WidgetFileSettings
widgetFileSettings = def
    { wfsHamletSettings = defaultHamletSettings
        { hamletNewlines = AlwaysNewlines
        }
    }

-- The rest of this file contains settings which rarely need changing by a
-- user.

widgetFile :: String -> Q Exp
widgetFile = (if development then widgetFileReload
                             else widgetFileNoReload)
              widgetFileSettings

data Extra = Extra
    { extraCopyright  :: Text
    , extraAnalytics  :: Maybe Text -- ^ Google Analytics
    , extraStaticRoot :: Maybe Text
    } deriving Show

parseExtra :: DefaultEnv -> Object -> Parser Extra
parseExtra _ o = Extra
    <$> o .:  "copyright"
    <*> o .:? "analytics"
    <*> o .:? "staticRoot"
