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

-}

{-# OPTIONS_GHC -fno-warn-orphans #-}

{-# LANGUAGE DeriveGeneric         #-}
{-# LANGUAGE FlexibleContexts      #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NoImplicitPrelude     #-}
{-# LANGUAGE TemplateHaskell       #-}

module Gargantext.Viz.Graph
  where

import Control.Lens (makeLenses)
import Data.Aeson.TH (deriveJSON)
import qualified Data.Aeson as DA
import Data.ByteString.Lazy as DBL (readFile, writeFile)
import Data.Swagger
import Data.Text (Text, pack)
import qualified Data.Text as T
import GHC.Generics (Generic)
import GHC.IO (FilePath)
import Database.PostgreSQL.Simple.FromField (FromField, fromField)
import Opaleye (QueryRunnerColumnDefault, queryRunnerColumnDefault, PGJsonb, fieldQueryRunnerColumn)
import Test.QuickCheck.Arbitrary (Arbitrary, arbitrary)
import Test.QuickCheck (elements)
import qualified Text.Read as T

import Gargantext.Core.Types (ListId)
import Gargantext.Core.Utils.Prefix (unPrefix, unPrefixSwagger)
import Gargantext.Database.Admin.Types.Node (NodeId)
import Gargantext.Database.Admin.Types.Hyperdata (Hyperdata)
import Gargantext.Database.Prelude (fromField')
import Gargantext.Prelude


data TypeNode = Terms | Unknown
  deriving (Show, Generic)

$(deriveJSON (unPrefix "") ''TypeNode)
instance ToSchema TypeNode

data Attributes = Attributes { clust_default :: Int }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "") ''Attributes)
instance ToSchema Attributes

data Node = Node { node_size  :: Int
                 , node_type  :: TypeNode -- TODO NgramsType | Person
                 , node_id    :: Text     -- TODO NgramId
                 , node_label :: Text
                 , node_x_coord :: Double
                 , node_y_coord :: Double
                 , node_attributes :: Attributes
                 }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "node_") ''Node)
instance ToSchema Node where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "node_")


data Edge = Edge { edge_source :: Text
                 , edge_target :: Text
                 , edge_weight :: Double
                 , edge_confluence :: Double
                 , edge_id     :: Text
                 }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "edge_") ''Edge)
instance ToSchema Edge where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "edge_")

---------------------------------------------------------------
data LegendField = LegendField { _lf_id :: Int
                               , _lf_color :: Text
                               , _lf_label :: Text
   } deriving (Show, Generic)
$(deriveJSON (unPrefix "_lf_") ''LegendField)

instance ToSchema LegendField where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "_lf_")

makeLenses ''LegendField
---------------------------------------------------------------
type Version = Int
data ListForGraph = ListForGraph { _lfg_listId  :: ListId
                                 , _lfg_version :: Version
                 } deriving (Show, Generic)
$(deriveJSON (unPrefix "_lfg_") ''ListForGraph)

instance ToSchema ListForGraph where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "_lfg_")

makeLenses ''ListForGraph

--
data GraphMetadata = GraphMetadata { _gm_title    :: Text   -- title of the graph
                                   , _gm_corpusId :: [NodeId]  -- we can map with different corpus
                                   , _gm_legend   :: [LegendField] -- legend of the Graph
                                   , _gm_list     :: ListForGraph
                                   -- , _gm_version  :: Int
                                   }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "_gm_") ''GraphMetadata)
instance ToSchema GraphMetadata where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "_gm_")
makeLenses ''GraphMetadata


data Graph = Graph { _graph_nodes :: [Node]
                   , _graph_edges :: [Edge]
                   , _graph_metadata :: Maybe GraphMetadata
                   }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "_graph_") ''Graph)
makeLenses ''Graph

instance ToSchema Graph where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "_graph_")

-- | Intances for the mack
instance Arbitrary Graph where
  arbitrary = elements $ [defaultGraph]

defaultGraph :: Graph
defaultGraph = Graph {_graph_nodes = [Node {node_x_coord=0, node_y_coord=0, node_size = 4, node_type = Terms, node_id = pack "0", node_label = pack "animal", node_attributes = Attributes {clust_default = 0}},Node {node_x_coord=0, node_y_coord=0, node_size = 3, node_type = Terms, node_id = pack "1", node_label = pack "bird", node_attributes = Attributes {clust_default = 0}},Node {node_x_coord=0, node_y_coord=0, node_size = 2, node_type = Terms, node_id = pack "2", node_label = pack "boy", node_attributes = Attributes {clust_default = 1}},Node {node_x_coord=0, node_y_coord=0, node_size = 2, node_type = Terms, node_id = pack "3", node_label = pack "dog", node_attributes = Attributes {clust_default = 0}},Node {node_x_coord=0, node_y_coord=0, node_size = 2, node_type = Terms, node_id = pack "4", node_label = pack "girl", node_attributes = Attributes {clust_default = 1}},Node {node_x_coord=0, node_y_coord=0, node_size = 4, node_type = Terms, node_id = pack "5", node_label = pack "human body", node_attributes = Attributes {clust_default = 1}},Node {node_x_coord=0, node_y_coord=0, node_size = 3, node_type = Terms, node_id = pack "6", node_label = pack "object", node_attributes = Attributes {clust_default = 2}},Node {node_x_coord=0, node_y_coord=0, node_size = 2, node_type = Terms, node_id = pack "7", node_label = pack "pen", node_attributes = Attributes {clust_default = 2}},Node {node_x_coord=0, node_y_coord=0, node_size = 2, node_type = Terms, node_id = pack "8", node_label = pack "table", node_attributes = Attributes {clust_default = 2}}], _graph_edges = [Edge {edge_source = pack "0", edge_target = pack "0", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "0"},Edge {edge_source = pack "1", edge_target = pack "0", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "1"},Edge {edge_source = pack "1", edge_target = pack "1", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "2"},Edge {edge_source = pack "2", edge_target = pack "2", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "3"},Edge {edge_source = pack "2", edge_target = pack "5", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "4"},Edge {edge_source = pack "3", edge_target = pack "0", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "5"},Edge {edge_source = pack "3", edge_target = pack "1", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "6"},Edge {edge_source = pack "3", edge_target = pack "3", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "7"},Edge {edge_source = pack "4", edge_target = pack "4", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "8"},Edge {edge_source = pack "4", edge_target = pack "5", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "9"},Edge {edge_source = pack "5", edge_target = pack "5", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "10"},Edge {edge_source = pack "6", edge_target = pack "6", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "11"},Edge {edge_source = pack "7", edge_target = pack "6", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "12"},Edge {edge_source = pack "7", edge_target = pack "7", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "13"},Edge {edge_source = pack "8", edge_target = pack "6", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "14"},Edge {edge_source = pack "8", edge_target = pack "7", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "15"},Edge {edge_source = pack "8", edge_target = pack "8", edge_weight = 1.0, edge_confluence=0.5, edge_id = pack "16"}], _graph_metadata = Nothing}


-----------------------------------------------------------
-- V3 Gargantext Version

data AttributesV3 = AttributesV3 { cl :: Int }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "") ''AttributesV3)

data NodeV3 = NodeV3 { no_id :: Int
                     , no_at :: AttributesV3
                     , no_s  :: Int
                     , no_lb :: Text
                     }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "no_") ''NodeV3)

data EdgeV3 = EdgeV3 { eo_s :: Int
                     , eo_t :: Int
                     , eo_w :: Text
                     }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "eo_") ''EdgeV3)

data GraphV3 = GraphV3 { go_links :: [EdgeV3]
                       , go_nodes :: [NodeV3]
                       }
  deriving (Show, Generic)
$(deriveJSON (unPrefix "go_") ''GraphV3)

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

data HyperdataGraph = HyperdataGraph { _hyperdataGraph :: !(Maybe Graph)
                                   } deriving (Show, Generic)
$(deriveJSON (unPrefix "") ''HyperdataGraph)

instance Hyperdata HyperdataGraph
makeLenses ''HyperdataGraph

instance FromField HyperdataGraph
  where
    fromField = fromField'

instance QueryRunnerColumnDefault PGJsonb HyperdataGraph
  where
    queryRunnerColumnDefault = fieldQueryRunnerColumn


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

graphV3ToGraph :: GraphV3 -> Graph
graphV3ToGraph (GraphV3 links nodes) = Graph (map nodeV32node nodes) (zipWith linkV32edge [1..] links) Nothing
  where
    nodeV32node :: NodeV3 -> Node
    nodeV32node (NodeV3 no_id' (AttributesV3 cl') no_s' no_lb')
                = Node no_s' Terms (cs $ show no_id') no_lb' 0 0 (Attributes cl')

    linkV32edge :: Int -> EdgeV3 -> Edge
    linkV32edge n (EdgeV3 eo_s' eo_t' eo_w') = Edge (cs $ show eo_s') (cs $ show eo_t') ((T.read $ T.unpack eo_w') :: Double) 0.5 (cs $ show n)


graphV3ToGraphWithFiles :: FilePath -> FilePath -> IO ()
graphV3ToGraphWithFiles g1 g2 = do
  -- GraphV3 <- IO Fichier
  graph <- DBL.readFile g1
  let newGraph = case DA.decode graph :: Maybe GraphV3 of
        Nothing -> panic (T.pack "no graph")
        Just new -> new

  DBL.writeFile g2 (DA.encode $ graphV3ToGraph newGraph)

readGraphFromJson :: MonadBase IO m => FilePath -> m (Maybe Graph)
readGraphFromJson fp = do
  graph <- liftBase $ DBL.readFile fp
  pure $ DA.decode graph