{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeOperators #-}
{-# 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 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 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 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
      { -- | HERO_PORT
        heroPort :: Warp.Port,
        -- | HERO_CLIENT
        heroClient :: FilePath
      }
  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 = Database.getComics

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