{-|
Module      : Gargantext.Viz.Phylo.Main
Description : Phylomemy Main
Copyright   : (c) CNRS, 2017-Present
License     : AGPL + CECILL v3
Maintainer  : team@gargantext.org
Stability   : experimental
Portability : POSIX

-}

{-# LANGUAGE FlexibleContexts  #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RankNTypes        #-}
{-# LANGUAGE ViewPatterns      #-}

module Gargantext.Viz.Phylo.Main
  where

import Control.Monad.IO.Class (liftIO)
import Data.GraphViz
import Data.Maybe
import Data.Text (Text)
import Debug.Trace (trace)
import GHC.IO (FilePath)
import Gargantext.API.Ngrams.Tools (getTermsWith)
import Gargantext.Core.Types
import Gargantext.Database.Flow
import Gargantext.Database.Schema.Ngrams (NgramsType(..))
import Gargantext.Database.Schema.Node (defaultList)
import Gargantext.Database.Schema.NodeNode (selectDocs)
import Gargantext.Prelude
import Gargantext.Text.Context (TermList)
import Gargantext.Text.Terms.WithList
import Gargantext.Viz.Phylo hiding (Svg, Dot)
import Gargantext.Viz.Phylo.LevelMaker
import Gargantext.Viz.Phylo.Tools
import Gargantext.Viz.Phylo.View.Export
import Gargantext.Viz.Phylo.View.ViewMaker    -- TODO Just Maker is fine
import Servant
import qualified Data.ByteString as DB
import qualified Data.List as List
import qualified Data.Map  as Map
import qualified Data.Text as Text

type MinSizeBranch = Int

flowPhylo :: FlowCmdM env err m
          => CorpusId
          -> m Phylo
flowPhylo cId = do

  list       <- defaultList cId
  termList <- Map.toList <$> getTermsWith Text.words [list] NgramsTerms GraphTerm

  docs' <- catMaybes
          <$> map (\h -> (,) <$> _hyperdataDocument_publication_year h
                             <*> _hyperdataDocument_abstract h
                  )
          <$> selectDocs cId

  let
    patterns = buildPatterns termList
    -- | To filter the Ngrams of a document based on the termList
    filterTerms :: Patterns -> (Date, Text) -> (Date, [Text])
    filterTerms patterns (y,d) = (y,termsInText patterns d)
      where
        --------------------------------------
        termsInText :: Patterns -> Text -> [Text]
        termsInText pats txt = List.nub $ List.concat $ map (map Text.unwords) $ extractTermsWithList pats txt
        --------------------------------------

    docs = map ( (\(y,t) -> Document y t) . filterTerms patterns) docs'

  --liftIO $ flowPhylo' (List.sortOn date docs) termList l m fp
  pure $ buildPhylo (List.sortOn date docs) termList


-- TODO SortedList Document
flowPhylo' :: [Document] -> TermList      -- ^Build
          -> Level      -> MinSizeBranch -- ^View
          -> FilePath
          -> IO FilePath
flowPhylo' corpus terms l m fp = do
  let
    phylo = buildPhylo corpus terms
    phVie = viewPhylo  l m phylo

  writePhylo fp phVie


defaultQuery :: PhyloQueryBuild
defaultQuery = defaultQueryBuild'
  "Default Title"
  "Default Description"

buildPhylo :: [Document] -> TermList -> Phylo
buildPhylo = trace (show defaultQuery) $ buildPhylo' defaultQuery

buildPhylo' :: PhyloQueryBuild -> [Document] -> TermList -> Phylo
buildPhylo' q corpus termList = toPhylo q corpus termList Map.empty

queryView :: Level -> MinSizeBranch -> PhyloQueryView
queryView level _minSizeBranch = PhyloQueryView level Merge False 2
           [BranchAge]
           []
           -- [SizeBranch $ SBParams minSizeBranch]
           [BranchPeakFreq,GroupLabelCooc]
           (Just (ByBranchAge,Asc))
           Json Flat True

viewPhylo :: Level -> MinSizeBranch -> Phylo -> PhyloView
viewPhylo l b phylo = toPhyloView (queryView l b) phylo

writePhylo :: FilePath -> PhyloView -> IO FilePath
writePhylo fp phview = runGraphviz (viewToDot phview) Svg fp

viewPhylo2Svg :: PhyloView -> IO DB.ByteString
viewPhylo2Svg p = graphvizWithHandle Dot (viewToDot p) Svg DB.hGetContents