--
-- 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 create_table_reserves_out(
  IN shard_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR default 'reserves_out';
BEGIN

  PERFORM create_partitioned_table(
    'CREATE TABLE IF NOT EXISTS %I'
      '(reserve_out_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
      ',h_blind_ev BYTEA CHECK (LENGTH(h_blind_ev)=64) UNIQUE'
      ',denominations_serial INT8 NOT NULL' -- REFERENCES denominations (denominations_serial)'
      ',denom_sig BYTEA NOT NULL'
      ',reserve_uuid INT8 NOT NULL' -- REFERENCES reserves (reserve_uuid) ON DELETE CASCADE'
      ',reserve_sig BYTEA NOT NULL CHECK (LENGTH(reserve_sig)=64)'
      ',execution_date INT8 NOT NULL'
      ',amount_with_fee_val INT8 NOT NULL'
      ',amount_with_fee_frac INT4 NOT NULL'
    ') %s ;'
    ,'reserves_out'
    ,'PARTITION BY HASH (h_blind_ev)'
    ,shard_suffix
  );

  table_name = concat_ws('_', table_name, shard_suffix);

  EXECUTE FORMAT (
    'CREATE INDEX IF NOT EXISTS ' || table_name || '_by_reserve_out_serial_id_index '
    'ON ' || table_name || ' '
    '(reserve_out_serial_id);'
  );
  -- FIXME: change query to use reserves_out_by_reserve instead and materialize execution_date there as well???
  EXECUTE FORMAT (
    'CREATE INDEX IF NOT EXISTS ' || table_name || '_by_reserve_uuid_and_execution_date_index '
    'ON ' || table_name || ' '
    '(reserve_uuid, execution_date);'
  );
  EXECUTE FORMAT (
    'COMMENT ON INDEX ' || table_name || '_by_reserve_uuid_and_execution_date_index '
    'IS ' || quote_literal('for get_reserves_out and exchange_do_withdraw_limit_check') || ';'
  );

END
$$;



CREATE OR REPLACE FUNCTION add_constraints_to_reserves_out_partition(
  IN partition_suffix VARCHAR
)
RETURNS void
LANGUAGE plpgsql
AS $$
BEGIN
  EXECUTE FORMAT (
    'ALTER TABLE reserves_out_' || partition_suffix || ' '
      'ADD CONSTRAINT reserves_out_' || partition_suffix || '_reserve_out_serial_id_key '
        'UNIQUE (reserve_out_serial_id)'
  );
END
$$;

CREATE OR REPLACE FUNCTION create_table_reserves_out_by_reserve(
  IN shard_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'reserves_out_by_reserve';
BEGIN

  PERFORM create_partitioned_table(
  'CREATE TABLE IF NOT EXISTS %I'
    '(reserve_uuid INT8 NOT NULL' -- REFERENCES reserves (reserve_uuid) ON DELETE CASCADE
    ',h_blind_ev BYTEA CHECK (LENGTH(h_blind_ev)=64)'
    ') %s '
    ,table_name
    ,'PARTITION BY HASH (reserve_uuid)'
    ,shard_suffix
  );

  table_name = concat_ws('_', table_name, shard_suffix);

  EXECUTE FORMAT (
    'CREATE INDEX IF NOT EXISTS ' || table_name || '_main_index '
    'ON ' || table_name || ' '
    '(reserve_uuid);'
  );

END
$$;