{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE MonoLocalBinds      #-}
{-# LANGUAGE TemplateHaskell     #-}
{-# LANGUAGE TypeOperators       #-}

module Gargantext.API.Node.DocumentUpload where

import Control.Lens (makeLenses, view)
import Data.Aeson
import Data.Swagger (ToSchema)
import qualified Data.Text as T
import Data.Time.Clock
import Data.Time.Calendar
import GHC.Generics (Generic)
import Servant
import Servant.Job.Async

import Gargantext.API.Admin.Orchestrator.Types (JobLog(..), AsyncJobs)
import Gargantext.API.Job (jobLogSuccess)
import Gargantext.API.Prelude
import Gargantext.Core (Lang(..))
import Gargantext.Core.Text.Terms (TermType(..))
import Gargantext.Core.Types.Individu (User(..))
import Gargantext.Core.Utils.Prefix (unCapitalize, dropPrefix)
import Gargantext.Database.Action.Flow (flowDataText, DataText(..))
import Gargantext.Database.Action.Flow.Types
import Gargantext.Database.Admin.Types.Hyperdata.Document (HyperdataDocument(..))
import Gargantext.Database.Admin.Types.Node
import Gargantext.Database.Query.Table.Node (getClosestParentIdByType')
import Gargantext.Prelude

data DocumentUpload = DocumentUpload
  { _du_abstract :: T.Text
  , _du_authors  :: T.Text
  , _du_sources  :: T.Text
  , _du_title    :: T.Text }
  deriving (Generic)

$(makeLenses ''DocumentUpload)

instance ToSchema DocumentUpload
instance FromJSON DocumentUpload
  where
    parseJSON = genericParseJSON
            ( defaultOptions { sumEncoding = ObjectWithSingleField 
                            , fieldLabelModifier = unCapitalize . dropPrefix "_du_"
                            , omitNothingFields = True
                            }
            )
instance ToJSON DocumentUpload
  where
    toJSON = genericToJSON
           ( defaultOptions { sumEncoding = ObjectWithSingleField 
                            , fieldLabelModifier = unCapitalize . dropPrefix "_du_"
                            , omitNothingFields = True
                            }
           )

type API = Summary " Document upload"
           :> "document"
           :> "upload"
           :> "async"
           :> AsyncJobs JobLog '[JSON] DocumentUpload JobLog

api :: UserId -> NodeId -> GargServer API
api uId nId =
  serveJobsAPI $
    JobFunction (\q log' -> do
      documentUpload uId nId q (liftBase . log')
    )

documentUpload :: (FlowCmdM env err m)
               => UserId
               -> NodeId
               -> DocumentUpload
               -> (JobLog -> m ())
               -> m JobLog
documentUpload uId nId doc logStatus = do
  let jl = JobLog { _scst_succeeded = Just 0
                  , _scst_failed    = Just 0
                  , _scst_remaining = Just 1
                  , _scst_events    = Just [] }
  logStatus jl
  
  mcId <- getClosestParentIdByType' nId NodeCorpus
  let cId = case mcId of
        Just c  -> c
        Nothing -> panic $ T.pack $ "[G.A.N.DU] Node has no corpus parent: " <> show nId

  (year, month, day) <- liftBase $ getCurrentTime >>= return . toGregorian . utctDay
  let nowS = T.pack $ show year <> "-" <> show month <> "-" <> show day
  
  let hd = HyperdataDocument { _hd_bdd = Nothing
                             , _hd_doi = Nothing
                             , _hd_url = Nothing
                             , _hd_uniqId = Nothing
                             , _hd_uniqIdBdd = Nothing
                             , _hd_page = Nothing
                             , _hd_title = Just $ view du_title doc
                             , _hd_authors = Just $ view du_authors doc
                             , _hd_institutes = Nothing
                             , _hd_source = Just $ view du_sources doc
                             , _hd_abstract = Just $ view du_abstract doc
                             , _hd_publication_date = Just nowS
                             , _hd_publication_year = Just $ fromIntegral year
                             , _hd_publication_month = Just month
                             , _hd_publication_day = Just day
                             , _hd_publication_hour = Nothing
                             , _hd_publication_minute = Nothing
                             , _hd_publication_second = Nothing
                             , _hd_language_iso2 = Just $ T.pack $ show EN }
  
  _ <- flowDataText (RootId (NodeId uId)) (DataNew [[hd]]) (Multi EN) cId Nothing

  pure $ jobLogSuccess jl