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

Triggers on NodesNodes table.

-}

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

module Gargantext.Database.Admin.Trigger.NodesNodes
  where

import Database.PostgreSQL.Simple.SqlQQ (sql)
-- import Database.PostgreSQL.Simple.Types (Values(..), QualifiedIdentifier(..))
import Gargantext.Database.Config (nodeTypeId)
import Gargantext.Database.Types.Node -- (ListId, CorpusId, NodeId)
import Gargantext.Core.Types.Main (listTypeId, ListType(CandidateTerm))
import Gargantext.Database.Utils (Cmd, execPGSQuery)
import Gargantext.Prelude
import qualified Database.PostgreSQL.Simple as DPS

type MasterListId = ListId

triggerDeleteCount :: MasterListId -> Cmd err Int64
triggerDeleteCount lId = execPGSQuery query (lId, nodeTypeId NodeList)
  where
    query :: DPS.Query
    query = [sql|
      CREATE OR REPLACE FUNCTION set_delete_count() RETURNS trigger AS $$
      BEGIN
            UPDATE node_node_ngrams SET weight = weight - d.delete_count
             FROM (SELECT old1.node1_id as node1_id, lists.id as node2_id, nnn.ngrams_id as ngrams_id, nnn.ngrams_type as ngrams_type, count(*) as delete_count FROM OLD as old1
                INNER JOIN nodes doc            ON doc.id          = old1.node2_id
                INNER JOIN nodes lists          ON lists.parent_id = old1.node1_id
                INNER JOIN node_node_ngrams nnn ON nnn.node2_id    = doc.id
                WHERE nnn.node1_id in (?, lists.id)
                  AND lists.typename = ?
                GROUP BY old1.node1_id, lists.id, nnn.ngrams_id, nnn.ngrams_type
            ) AS d
            WHERE node_node_ngrams.node1_id = d.node1_id
              AND node_node_ngrams.node2_id = d.node2_id
              AND node_node_ngrams.ngrams_id = d.ngrams_id
              AND node_node_ngrams.ngrams_type = d.ngrams_type
                ;
        RETURN NULL;
      END
      $$ LANGUAGE plpgsql;

      -- DROP trigger trigger_delete_count on nodes_nodes;
      CREATE TRIGGER trigger_delete_count AFTER DELETE on nodes_nodes
      REFERENCING OLD TABLE AS OLD
      FOR EACH STATEMENT
      EXECUTE PROCEDURE set_delete_count();
  |]

triggerInsertCount :: MasterListId -> Cmd err Int64
triggerInsertCount lId = execPGSQuery query (lId, nodeTypeId NodeList)
  where
    query :: DPS.Query
    query = [sql|
        CREATE OR REPLACE FUNCTION set_insert_count() RETURNS trigger AS $$
        BEGIN
              INSERT INTO node_node_ngrams (node1_id, node2_id, ngrams_id, ngrams_type, weight)
              SELECT new1.node1_id , lists.id, nnn.ngrams_id, nnn.ngrams_type, count(*) as weight from NEW as new1
                  INNER JOIN nodes doc            ON doc.id          = new1.node2_id
                  INNER JOIN nodes lists          ON lists.parent_id = new1.node1_id
                  INNER JOIN node_node_ngrams nnn ON nnn.node2_id    = doc.id
                  WHERE nnn.node1_id in (?, lists.id)
                    AND lists.typename = ?
                  GROUP BY new1.node1_id, lists.id, nnn.ngrams_id, nnn.ngrams_type
              ON CONFLICT (node1_id, node2_id, ngrams_id, ngrams_type)
                 DO UPDATE set weight = node_node_ngrams.weight + excluded.weight
                  ;
          RETURN NULL;
        END
        $$ LANGUAGE plpgsql;

        -- DROP trigger trigger_insert_count on nodes_nodes;
        CREATE TRIGGER trigger_insert_count AFTER INSERT on nodes_nodes
        REFERENCING NEW TABLE AS NEW
        FOR EACH STATEMENT
        EXECUTE PROCEDURE set_insert_count();
  |]

triggerUpdateAdd :: MasterListId -> Cmd err Int64
triggerUpdateAdd lId = execPGSQuery query (lId, nodeTypeId NodeList)
  where
    query :: DPS.Query
    query = [sql|
        CREATE OR REPLACE FUNCTION set_update_ngrams_add() RETURNS trigger AS $$
        BEGIN
               UPDATE node_node_ngrams nnn0 SET weight = weight + d.fix_count
               FROM (SELECT new1.node1_id as node1_id, lists.id as node2_id, nnn.ngrams_id as ngrams_id, nnn.ngrams_type as ngrams_type, count(*) as fix_count
                   FROM NEW as new1
                   INNER JOIN nodes       lists    ON new1.node1_id = lists.parent_id
                   INNER JOIN node_node_ngrams nnn ON new1.node2_id = nnn.node2_id
                  WHERE nnn.node1_id in (?, lists.id)  -- (masterList_id, userLists)
                    AND lists.typename = ?
                  GROUP BY new1.node1_id, lists.id, nnn.ngrams_id, nnn.ngrams_type
                    ) as d
                WHERE nnn0.node1_id = d.node1_id
                AND   nnn0.node2_id = d.node2_id
                AND   nnn0.ngrams_id = d.ngrams_id
                AND   nnn0.ngrams_type = d.ngrams_type
                ;
          RETURN NULL;
        END
        $$ LANGUAGE plpgsql;

        -- DROP trigger trigger_count_update_add on nodes_nodes;
        CREATE TRIGGER trigger_count_update_add AFTER UPDATE on nodes_nodes
        REFERENCING OLD TABLE AS OLD NEW TABLE AS NEW
        FOR EACH ROW
        WHEN (OLD.category <= 0 AND NEW.category >= 1)
        EXECUTE PROCEDURE set_update_ngrams_add();
  |]

triggerUpdateDel :: MasterListId -> Cmd err Int64
triggerUpdateDel lId = execPGSQuery query (lId, nodeTypeId NodeList)
  where
    query :: DPS.Query
    query = [sql|
        CREATE OR REPLACE FUNCTION set_update_ngrams_count_del() RETURNS trigger AS $$
        BEGIN
               UPDATE node_node_ngrams nnn0 SET weight = weight - d.fix_count
               FROM (SELECT new1.node1_id as node1_id, lists.id as node2_id, nnn.ngrams_id as ngrams_id, nnn.ngrams_type as ngrams_type, count(*) as fix_count
                   FROM NEW as new1
                   INNER JOIN nodes       lists    ON new1.node1_id = lists.parent_id
                   INNER JOIN node_node_ngrams nnn ON new1.node2_id = nnn.node2_id
                  WHERE nnn.node1_id in (?, lists.id)  -- (masterList_id, userLists)
                    AND lists.typename = ?
                  GROUP BY new1.node1_id, lists.id, nnn.ngrams_id, nnn.ngrams_type
                    ) as d
                WHERE nnn0.node1_id = d.node1_id
                AND   nnn0.node2_id = d.node2_id
                AND   nnn0.ngrams_id = d.ngrams_id
                AND   nnn0.ngrams_type = d.ngrams_type
                ;
          RETURN NULL;
        END
        $$ LANGUAGE plpgsql;

        -- DROP trigger trigger_count_delete2 on nodes_nodes;
        CREATE TRIGGER trigger_count_delete2 AFTER UPDATE on nodes_nodes
        REFERENCING OLD TABLE AS OLD NEW TABLE AS NEW
        FOR EACH ROW
        WHEN (OLD.category >= 1 AND NEW.category <= 0)
        EXECUTE PROCEDURE set_update_ngrams_count_del();

  |]

-- TODO add groups
triggerCoocInsert :: MasterListId -> Cmd err Int64
triggerCoocInsert lid = execPGSQuery query ( lid
                                           -- , nodeTypeId NodeCorpus
                                           -- , nodeTypeId NodeDocument
                                           -- , nodeTypeId NodeList
                                           , listTypeId CandidateTerm
                                           , listTypeId CandidateTerm
                                           )
  where
    query :: DPS.Query
    query = [sql|
          CREATE OR REPLACE FUNCTION nodes_nodes_set_cooc() RETURNS trigger AS $$
          BEGIN
            IF pg_trigger_depth() <> 1 THEN
              RETURN NEW;
            END IF;
            IF TG_OP = 'INSERT' THEN
                INSERT INTO node_nodengrams_nodengrams (node_id, node_ngrams1_id, node_ngrams2_id, weight)
                WITH input(corpus_id, nn1, nn2, weight) AS (
                  SELECT new1.node1_id, nn1.id, nn2.id, count(*) from NEW as new1
                        INNER JOIN node_ngrams nn1
                                ON nn1.node_id = ? -- COALESCE(?,?) --(masterList, userList)
                        INNER JOIN node_ngrams nn2
                                ON nn2.node_id = nn1.node_id

                        INNER JOIN node_node_ngrams2 nnn1
                                ON nnn1.node_id = new1.node2_id

                        INNER JOIN node_node_ngrams2 nnn2
                                ON nnn2.node_id = new1.node2_id

                        WHERE nnn1.nodengrams_id = nn1.id
                          AND nnn2.nodengrams_id = nn2.id
                          AND nn1.id < nn2.id
                          AND nn1.node_subtype >= ?
                          AND nn2.node_subtype >= ?
                        GROUP BY new1.node1_id, nn1.id, nn2.id
                        )
                    SELECT * from input where weight >= 1

                ON CONFLICT (node_id, node_ngrams1_id, node_ngrams2_id)
                   DO UPDATE set weight = node_nodengrams_nodengrams.weight + excluded.weight
                   ;
            END IF;

            RETURN NULL;
          END
          $$ LANGUAGE plpgsql;

          -- DROP trigger trigger_cooc on node_node_ngrams2;

          CREATE TRIGGER trigger_cooc_insert AFTER INSERT on nodes_nodes
          REFERENCING NEW TABLE AS NEW
          FOR EACH STATEMENT
          EXECUTE PROCEDURE nodes_nodes_set_cooc();
   |]