module Gargantext.Components.Document.Layout
  ( layout
  ) where

import Gargantext.Prelude

import Data.Array as A
import Data.Map as Map
import Data.Maybe (Maybe(..), fromMaybe, isJust, maybe)
import Data.Ord (greaterThan)
import Data.Set (Set)
import Data.Set as Set
import Data.String (length)
import Data.String as String
import Data.Tuple.Nested ((/\))
import Gargantext.Components.Annotation.Field as AnnotatedField
import Gargantext.Components.Annotation.Types as AFT
import Gargantext.Components.AutoUpdate (autoUpdate)
import Gargantext.Components.Bootstrap as B
import Gargantext.Components.Bootstrap.Types (ComponentStatus(..), SpinnerTheme(..))
import Gargantext.Components.Category (ratingSimpleLoader)
import Gargantext.Components.Document.Types (DocPath, Document(..), LoadedData, initialState)
import Gargantext.Components.GraphQL.Endpoints (getContextNgrams)
import Gargantext.Components.NgramsTable.AutoSync (useAutoSync)
import Gargantext.Components.Node (NodePoly(..))
import Gargantext.Config.REST (logRESTError)
import Gargantext.Core.NgramsTable.Functions (addNewNgramA, applyNgramsPatches, coreDispatch, findNgramRoot, setTermListA, computeCache)
import Gargantext.Core.NgramsTable.Types (CoreAction(..), NgramsTable(..), NgramsTerm, Versioned(..), replace)
import Gargantext.Hooks.FirstEffect (useFirstEffect')
import Gargantext.Hooks.Loader (useLoader)
import Gargantext.Sessions (Session)
import Gargantext.Utils ((?))
import Gargantext.Utils as U
import Gargantext.Utils.Reactix as R2
import Reactix as R
import Reactix.DOM.HTML as H
import Record as Record
import Toestand as T

-------------------------------------------------------------------------



type Props =
  ( loaded   :: LoadedData
  , path     :: DocPath
  , session  :: Session
  | Options
  )

type Options =
  ( sideControlsSlot :: Maybe R.Element
  )

options :: Record Options
options =
  { sideControlsSlot: Nothing
  }

here :: R2.Here
here = R2.here "Gargantext.Components.Document.Layout"

layout :: forall r. R2.OptLeaf Options Props r
layout = R2.optLeaf layoutCpt options
layoutCpt :: R.Component Props
layoutCpt = here.component "layout" cpt where
  cpt props@{ path: path@{ listIds
                         , nodeId }
            , session } _ = do
    case A.head listIds of
      Nothing -> pure $ H.div {} [ H.text "No list supplied!" ]
      Just listId ->
        useLoader { errorHandler
                  , loader: \p -> getContextNgrams session p.contextId p.listId
                  , path: { contextId: nodeId, listId }
                  , render: \contextNgrams -> layoutWithContextNgrams $ Record.merge props { contextNgrams } }
    where
      errorHandler = logRESTError here "[layout]"

type WithContextNgramsProps =
  ( contextNgrams :: Array NgramsTerm
  | Props )

layoutWithContextNgrams :: forall r. R2.OptLeaf Options WithContextNgramsProps r
layoutWithContextNgrams = R2.optLeaf layoutWithContextNgramsCpt options
layoutWithContextNgramsCpt :: R.Component WithContextNgramsProps
layoutWithContextNgramsCpt = here.component "layoutWithContextNgrams" cpt where
  -- Component
  cpt { contextNgrams
      , path
      , loaded:
          loaded@{ ngramsTable: Versioned
          { data: initTable }
          , document: NodePoly
            { hyperdata: Document doc
            }
          }
      , sideControlsSlot
      } _ = do
    -- | States
    -- |

    state'@{ ngramsLocalPatch } /\ state <-
      R2.useBox' $ initialState { loaded }

    mode' /\ mode <- R2.useBox' AFT.EditionMode

    let dispatch = coreDispatch path state
    { onPending, result } <- useAutoSync { state, action: dispatch }

    onPending' <- R2.useLive' onPending
    result'    <- R2.useLive' result

    -- | Computed
    -- |
    let

      withAutoUpdate = false

      ngrams = applyNgramsPatches state' initTable

      cache = computeCache ngrams $ Set.fromFoldable contextNgrams

      annotate text = AnnotatedField.annotatedField
        { ngrams
        , setTermList
        , text
        , mode: mode'
        , cache
        }

      setTermListOrAddA ngram Nothing        =
        addNewNgramA ngram
      setTermListOrAddA ngram (Just oldList) =
        setTermListA ngram <<< replace oldList

      setTermList ngram mOldList =
        dispatch <<< setTermListOrAddA (findNgramRoot ngrams ngram) mOldList

      hasAbstract =  maybe false (not String.null) doc.abstract

    -- | Hooks
    -- |

    -- R.useEffect' $ do
    --   let NgramsTable { ngrams_repo_elements } = ngrams
    --   here.log2 "[layout] length of ngrams" $ Map.size ngrams_repo_elements
    --   here.log2 "[layout] length of pats" $ A.length cache.pats
    --   here.log2 "[layout] contextNgrams" contextNgrams

    -- | Behaviors
    -- |
    let
      onModeChange = read >>> fromMaybe AFT.EditionMode >>> flip T.write_ mode

    -- | Render
    -- |
    pure $

      H.div
      { className: "document-layout" }
      --DEBUG
      --[ H.pre { rows: 30 } [
      --    H.text (stringifyWithIndent 2 (encodeJson (fst state)))
      --  ] ] <>
      [
        -- Header
        H.div
        { className: "document-layout__header" }
        [
          H.div
          { className: "document-layout__main-controls" }
          [
            -- Viewing mode
            B.wad
            [ "d-flex", "align-items-center", "width-auto" ]
            [
              H.label
              { className: "mr-1"
              }
              [
                B.icon
                { name: "tags" }
              ]
            ,
              B.formSelect
              { value: show mode'
              , callback: onModeChange
              , status: Enabled
              }
              [
                H.option
                { value: show AFT.AdditionMode }
                [ H.text "Add terms only" ]
              ,
                H.option
                { value: show AFT.EditionMode }
                [ H.text "Add and edit terms" ]
              ]
            ]
          ,
            R2.when withAutoUpdate $
              -- (?) purpose? would still working with current code?
              autoUpdate
              { duration: 5000
              , effect: dispatch $ Synchronize
                { afterSync: \_ -> pure unit
                }
              }
          -- @NOTE #386: revert manual for automatic sync
          --   syncResetButtons
          --   { afterSync
          --   , ngramsLocalPatch
          --   , performAction: dispatch
          --   }

          ]
        ,
          H.div
          { className: "document-layout__side-controls" }
          [
            -- Saving informations
            H.div
            { className: "document-layout__saving" }
            [
              R2.when' onPending'
              [
                B.spinner
                { theme: GrowTheme
                , className: "document-layout__saving__spinner"
                }
              ]
            ,
              R2.when (not onPending' && isJust result') $

                B.icon
                { name: "check"
                , className: "document-layout__saving__icon"
                }
            ]
          ,
            R2.fromMaybe sideControlsSlot identity
          ]
        ]
      ,
        -- Body
        H.div
        { className: "document-layout__body" }
        [
          H.div
          { className: "document-layout__title" }
          [
            annotate doc.title
          ]
        ,
          R2.fromMaybe doc.authors \authors ->

            H.div
            { className: "document-layout__authors" }
            [
              B.div'
              { className: "document-layout__authors__label" }
              "Authors"
            ,
              H.div
              { className: "document-layout__authors__content" }
              [
                -- @NOTE #386: annotate for "Authors" ngrams list
                annotate (Just authors)
              ]
            ]
        ,
          R2.fromMaybe doc.source \source ->

            H.div
            { className: "document-layout__source" }
            [
              B.div'
              { className: "document-layout__source__label" }
              "Source"
            ,
              B.div'
              { className: "document-layout__source__content" }
              source
            ]
        ,
            H.div
            { className: "document-layout__date" }
            [
              B.div'
              { className: "document-layout__date__label" }
              "Date"
            ,
              B.div'
              { className: "document-layout__date__content" }
              (publicationDate $ Document doc)
            ]
        , case path.mCorpusId of
            Nothing -> H.div {} []
            Just corpusId -> ratingSimpleLoader { docId: path.nodeId
                                                , corpusId
                                                , session: path.session  } []
        ,
          R2.when hasAbstract $

            H.div
            { className: "document-layout__abstract" }
            [
              B.div'
              { className: "document-layout__separator-label" }
              "Abstract"
            ,
              H.div
              { className: "document-layout__abstract__content" }
              [
                annotate doc.abstract
              ]
            ]
        -- (?) remove "Full text" block (unused feature for now,
        --     see #334)
        -- , H.div { className: "jumbotron" } [ H.p {} [ H.text "Empty Full Text" ] ]
        ]
      ]


-------------------------------------------------------------

publicationDate :: Document -> String
publicationDate (Document {publication_year: Nothing}) = ""
publicationDate (Document {publication_year: Just py, publication_month: Nothing}) = U.zeroPad 2 py
publicationDate (Document {publication_year: Just py, publication_month: Just pm, publication_day: Nothing}) = (U.zeroPad 2 py) <> "-" <> (U.zeroPad 2 pm)
publicationDate (Document {publication_year: Just py, publication_month: Just pm, publication_day: Just pd}) = (U.zeroPad 2 py) <> "-" <> (U.zeroPad 2 pm) <> "-" <> (U.zeroPad 2 pd)