--
-- This file is part of TALER
-- Copyright (C) 2014--2022 Taler Systems SA
--
-- TALER is free software; you can redistribute it and/or modify it under the
-- terms of the GNU General Public License as published by the Free Software
-- Foundation; either version 3, or (at your option) any later version.
--
-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along with
-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
--
CREATE OR REPLACE FUNCTION exchange_do_batch2_reserves_insert(
  IN in_reserve_pub BYTEA,
  IN in_expiration_date INT8,
  IN in_gc_date INT8,
  IN in_wire_ref INT8,
  IN in_credit_val INT8,
  IN in_credit_frac INT4,
  IN in_exchange_account_name VARCHAR,
  IN in_exectution_date INT8,
  IN in_wire_source_h_payto BYTEA,    ---h_payto
  IN in_payto_uri VARCHAR,
  IN in_reserve_expiration INT8,
  IN in_notify text,
  IN in2_reserve_pub BYTEA,
  IN in2_wire_ref INT8,
  IN in2_credit_val INT8,
  IN in2_credit_frac INT4,
  IN in2_exchange_account_name VARCHAR,
  IN in2_exectution_date INT8,
  IN in2_wire_source_h_payto BYTEA,    ---h_payto
  IN in2_payto_uri VARCHAR,
  IN in2_reserve_expiration INT8,
  OUT out_reserve_found BOOLEAN,
  OUT out_reserve_found2 BOOLEAN,
  OUT transaction_duplicate BOOLEAN,
  OUT transaction_duplicate2 BOOLEAN,
  OUT ruuid INT8,
  OUT ruuid2 INT8)
LANGUAGE plpgsql
AS $$
DECLARE
  curs_reserve_exist CURSOR
  FOR SELECT reserve_pub
  FROM reserves
  WHERE ruuid = reserves.reserve_uuid OR ruuid2 = reserves.reserve_uuid;

  curs_transaction_exist CURSOR
  FOR SELECT reserve_pub
  FROM reserves_in
  WHERE in_reserve_pub = reserves_in.reserve_pub
  OR reserves_in.reserve_pub = in2_reserve_pub;

  i RECORD;

BEGIN

  --SIMPLE INSERT ON CONFLICT DO NOTHING
  INSERT INTO wire_targets
    (wire_target_h_payto
    ,payto_uri)
    VALUES
    (in_wire_source_h_payto
    ,in_payto_uri),
    (in2_wire_source_h_payto
    ,in2_payto_uri)
  ON CONFLICT DO NOTHING;

  FOR k IN curs_reserve_exist
  LOOP
    IF in_reserve_pub = k.reserve_pub
    THEN
         out_reserve_found = TRUE;
    END IF;

    IF in2_reserve_pub = k.reserve_pub
    THEN
         out_reserve_found2 = TRUE;
    END IF;

    IF out_reserve_found AND out_reserve_found2
    THEN
        EXIT;
    END IF;
  END LOOP;


  IF out_reserve_found IS NULL
  THEN
        out_reserve_found=FALSE;
  END IF;
  IF out_reserve_found2 IS NULL
  THEN
        out_reserve_found2 = FALSE;
  END IF;
  IF out_reserve_found AND out_reserve_found2
  THEN
     transaction_duplicate = FALSE;
     transaction_duplicate2 = FALSE;
     RETURN;
  END IF;

  /*LOOP TO STORE UUID*/
  FOR i IN
  WITH input_rows
  (reserve_pub
    ,current_balance_val
    ,current_balance_frac
    ,expiration_date
    ,gc_date)
  AS
  (
   VALUES
    (in_reserve_pub
    ,in_credit_val
    ,in_credit_frac
    ,in_expiration_date
    ,in_gc_date),
    (in2_reserve_pub
    ,in2_credit_val
    ,in2_credit_frac
    ,in_expiration_date
    ,in_gc_date)
   ), ins AS (
   INSERT INTO reserves
   (reserve_pub
    ,current_balance_val
    ,current_balance_frac
    ,expiration_date
    ,gc_date)
    SELECT * FROM input_rows
    ON CONFLICT DO NOTHING
    RETURNING reserve_uuid)
   SELECT
	*
   FROM
	(
		SELECT
			reserve_uuid,
			ROW_NUMBER () OVER (ORDER BY reserve_uuid)
		FROM
			ins
	) x
  LOOP
    IF i.ROW_NUMBER = 1
    THEN
      ruuid = i.reserve_uuid;
    ELSE
      ruuid2 = i.reserve_uuid;
    END IF;
  END LOOP;



  PERFORM pg_notify(in_notify, NULL);

  INSERT INTO reserves_in
    (reserve_pub
    ,wire_reference
    ,credit_val
    ,credit_frac
    ,exchange_account_section
    ,wire_source_h_payto
    ,execution_date)
    VALUES
    (in_reserve_pub
    ,in_wire_ref
    ,in_credit_val
    ,in_credit_frac
    ,in_exchange_account_name
    ,in_wire_source_h_payto
    ,in_expiration_date),
    (in2_reserve_pub
    ,in2_wire_ref
    ,in2_credit_val
    ,in2_credit_frac
    ,in2_exchange_account_name
    ,in2_wire_source_h_payto
    ,in_expiration_date)
    ON CONFLICT DO NOTHING;
  IF FOUND
  THEN
    transaction_duplicate = FALSE;  /*HAPPY PATH THERE IS NO DUPLICATE TRANS AND NEW RESERVE*/
    transaction_duplicate2 = FALSE;
    RETURN;
  ELSE
    FOR l IN curs_transaction_exist
    LOOP
      IF in_reserve_pub = l.reserve_pub
      THEN
         transaction_duplicate = TRUE;
      END IF;

      IF in2_reserve_pub = l.reserve_pub
      THEN
         transaction_duplicate2 = TRUE;
      END IF;

      IF transaction_duplicate AND transaction_duplicate2
      THEN
        RETURN;
      END IF;
    END LOOP;
  END IF;

  IF transaction_duplicate IS NULL
  THEN
        transaction_duplicate=FALSE;
  END IF;
  IF transaction_duplicate2 IS NULL
  THEN
        transaction_duplicate2 = FALSE;
  END IF;

  RETURN;
END $$;