{-# LANGUAGE OverloadedStrings          #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MultiParamTypeClasses      #-}
{-# LANGUAGE DeriveGeneric              #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE PolyKinds                  #-}
{-# LANGUAGE DataKinds                  #-}
{-# LANGUAGE FlexibleInstances          #-}
{-# LANGUAGE TypeOperators              #-}
{-# LANGUAGE TypeApplications           #-}
{-# LANGUAGE TypeSynonymInstances       #-}
{-# LANGUAGE NoImplicitPrelude          #-}
-- | Hero web app
--
-- : exe mmc
--
-- : dep aeson
-- : dep clay
-- : dep containers
-- : dep dhall
-- : dep envy
-- : dep http-types
-- : dep lucid
-- : dep miso
-- : dep mtl
-- : dep network-uri
-- : dep protolude
-- : dep servant
-- : dep servant-lucid
-- : dep servant-server
-- : dep split
-- : dep split
-- : dep string-quote
-- : dep text
-- : dep wai
-- : dep wai-app-static
-- : dep wai-extra
-- : dep wai-middleware-metrics
-- : dep warp
module Hero.Server where

import qualified Clay
import           Hero.App
import qualified Hero.Assets   as Assets
import qualified Hero.Database as Database
import qualified Hero.Look     as Look
import qualified Hero.Look.Typography
                                               as Typography
import           Data.Aeson
import           Data.Proxy
import           Data.Text                      ( Text )
import qualified Data.Text.Lazy                as Lazy
import qualified Data.Text.Lazy.Encoding       as Lazy
import           GHC.Generics
import qualified Lucid                         as L
import           Lucid.Base
import           Miso
import           Miso.String
import           Network.HTTP.Media             ( (//)
                                                , (/:)
                                                )
import           Network.HTTP.Types      hiding ( Header )
import           Network.Wai
import           Network.Wai.Application.Static
import qualified Network.Wai.Handler.Warp      as Warp
import           Protolude
import           Servant
import qualified System.Envy                   as Envy
import qualified System.Exit                   as Exit
import qualified System.IO                     as IO


main :: IO ()
main = bracket startup shutdown $ uncurry Warp.run
 where
  say     = IO.hPutStrLn IO.stderr
  startup = Envy.decodeEnv >>= \case
    Left  e -> Exit.die e
    Right c -> do
      db <- Database.dummy
      say $ "hero"
      say $ "port: " ++ (show $ heroPort c)
      say $ "client: " ++ heroClient c
      let waiapp = app db c
      return (heroPort c, waiapp)
  shutdown :: a -> IO a
  shutdown = pure . identity

data Config = Config
  { heroPort :: Warp.Port -- ^ HERO_PORT
  , heroClient :: FilePath -- ^ HERO_CLIENT
  } deriving (Generic, Show)

instance Envy.DefConfig Config where
  defConfig = Config 3000 "_bild/Hero.Client/static"

instance Envy.FromEnv Config

app :: Database.ComicDB -> Config -> Application
app db cfg = serve
  (Proxy @AllRoutes)
  (    static
  :<|> cssHandlers
  :<|> jsonHandlers db
  :<|> serverHandlers
  :<|> pure heroManifest
  :<|> Tagged handle404
  )
  where static = serveDirectoryWith $ defaultWebAppSettings $ heroClient cfg


-- | HtmlPage for setting HTML doctype and header
newtype HtmlPage a = HtmlPage a
  deriving (Show, Eq)

-- | Convert client side routes into server-side web handlers
type ServerRoutes = ToServerRoutes ClientRoutes HtmlPage Action

type JsonApi = "api" :> "comic" :> Get '[JSON] [Comic]

type CssRoute = "css" :> "main.css" :> Get '[CSS] Text

newtype CSS = CSS
  { unCSS :: Text
  }

instance Accept CSS where
  contentType _ = "text" // "css" /: ("charset", "utf-8")

instance MimeRender CSS Text where
  mimeRender _ = Lazy.encodeUtf8 . Lazy.fromStrict

cssHandlers :: Server CssRoute
cssHandlers =
  return . Lazy.toStrict . Clay.render $ Typography.main <> Look.main

type AllRoutes
  = ("static" :> Raw)
      :<|>
      CssRoute
      :<|>
      JsonApi
      :<|>
      ServerRoutes
      :<|>
      ("manifest.json" :> Get '[JSON] Manifest)
      :<|>
      Raw

data Manifest = Manifest
  { name :: Text
  , short_name :: Text
  , start_url :: Text
  , display :: Text
  , theme_color :: Text
  , description :: Text
  } deriving (Show, Eq, Generic)

instance ToJSON Manifest

heroManifest :: Manifest
heroManifest = Manifest { name        = "Hero"
                        , short_name  = "Hero"
                        , start_url   = "."
                        , display     = "standalone"
                        , theme_color = "#0a0a0a"
                        , description = "Comics for all"
                        }

handle404 :: Application
handle404 _ respond =
  respond
    $ responseLBS status404 [("Content-Type", "text/html")]
    $ renderBS
    $ toHtml
    $ HtmlPage
    $ the404
    $ initModel homeLink

instance L.ToHtml a => L.ToHtml (HtmlPage a) where
  toHtmlRaw = L.toHtml
  toHtml (HtmlPage x) = do
    L.doctype_
    L.html_ [L.lang_ "en"] $ do
      L.head_ $ do
        L.title_ "Hero [alpha]"
        L.link_ [L.rel_ "manifest", L.href_ "/manifest.json"]
        L.link_ [L.rel_ "icon", L.type_ ""]

        -- icons
        L.link_
          [ L.rel_ "apple-touch-icon"
          , L.sizes_ "180x180"
          , L.href_
          $  Assets.cdnEdge
          <> "/old-assets/images/favicons/apple-touch-icon.png"
          ]
        L.link_
          [ L.rel_ "icon"
          , L.type_ "image/png"
          , L.sizes_ "32x32"
          , L.href_
          $  Assets.cdnEdge
          <> "/old-assets/images/favicons/favicon-32x32.png"
          ]
        L.link_
          [ L.rel_ "icon"
          , L.type_ "image/png"
          , L.sizes_ "16x16"
          , L.href_
          $  Assets.cdnEdge
          <> "/old-assets/images/favicons/favicon-16x16.png"
          ]
        L.link_
          [ L.rel_ "manifest"
          , L.href_
          $  Assets.cdnEdge
          <> "/old-assets/images/favicons/manifest.json"
          ]
        L.link_
          [ L.rel_ "mask-icon"
          , L.href_
          $  Assets.cdnEdge
          <> "/old-assets/images/favicons/safari-pinned-tab.svg"
          ]

        L.meta_ [L.charset_ "utf-8"]
        L.meta_ [L.name_ "theme-color", L.content_ "#000"]
        L.meta_ [L.httpEquiv_ "X-UA-Compatible", L.content_ "IE=edge"]
        L.meta_
          [L.name_ "viewport", L.content_ "width=device-width, initial-scale=1"]
        cssRef animateRef
        cssRef bulmaRef
        cssRef fontAwesomeRef
        cssRef "/css/main.css" -- TODO: make this a safeLink?
        jsRef "/static/mmc.js"
        jsRef "/static/usersnap.js"
      L.body_ (L.toHtml x)
   where
    jsRef href = L.with
      (L.script_ mempty)
      [ makeAttribute "src"   href
      , makeAttribute "async" mempty
      , makeAttribute "defer" mempty
      ]
    cssRef href = L.with
      (L.link_ mempty)
      [L.rel_ "stylesheet", L.type_ "text/css", L.href_ href]

fontAwesomeRef :: MisoString
fontAwesomeRef = "https://use.fontawesome.com/releases/v5.7.2/css/all.css"

animateRef :: MisoString
animateRef =
  "https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.0/animate.min.css"

bulmaRef :: MisoString
bulmaRef =
  "https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.2/css/bulma.min.css"

serverHandlers :: Server ServerRoutes
serverHandlers =
  homeHandler
    :<|> comicCoverHandler
    :<|> comicPageHandler
    :<|> comicPageFullHandler
    :<|> comicVideoHandler
    :<|> loginHandler
    :<|> discoverHandler
    :<|> chooseExperienceHandler

jsonHandlers :: Database.ComicDB -> Server JsonApi
jsonHandlers db = Database.getComics db

homeHandler :: Handler (HtmlPage (View Action))
homeHandler = pure . HtmlPage . home $ initModel homeLink

comicCoverHandler :: ComicId -> Handler (HtmlPage (View Action))
comicCoverHandler id =
  pure . HtmlPage . comicCover id . initModel $ comicLink id

comicPageHandler :: ComicId -> Page -> Handler (HtmlPage (View Action))
comicPageHandler id n =
  pure . HtmlPage . comicPlayer id n . initModel $ comicPlayerSpreadLink id n

comicPageFullHandler :: ComicId -> Page -> Handler (HtmlPage (View Action))
comicPageFullHandler id n =
  pure . HtmlPage . comicPlayer id n . initModel $ comicPlayerFullLink id n

comicVideoHandler :: ComicId -> Page -> Handler (HtmlPage (View Action))
comicVideoHandler id n =
  pure . HtmlPage . comicPlayer id n . initModel $ comicVideoLink id n

loginHandler :: Handler (HtmlPage (View Action))
loginHandler = pure . HtmlPage . login $ initModel loginLink

discoverHandler :: Handler (HtmlPage (View Action))
discoverHandler = pure . HtmlPage . discover $ initModel discoverLink

chooseExperienceHandler :: ComicId -> Page -> Handler (HtmlPage (View Action))
chooseExperienceHandler id n =
  pure . HtmlPage . comicPlayer id n . initModel $ chooseExperienceLink id n