--
-- 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_refresh_revealed_coins(
  IN shard_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'refresh_revealed_coins';
BEGIN

  PERFORM create_partitioned_table(
    'CREATE TABLE IF NOT EXISTS %I'
      '(rrc_serial BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
      ',melt_serial_id INT8 NOT NULL' -- REFERENCES refresh_commitments (melt_serial_id) ON DELETE CASCADE'
      ',freshcoin_index INT4 NOT NULL'
      ',link_sig BYTEA NOT NULL CHECK(LENGTH(link_sig)=64)'
      ',denominations_serial INT8 NOT NULL' -- REFERENCES denominations (denominations_serial) ON DELETE CASCADE'
      ',coin_ev BYTEA NOT NULL' -- UNIQUE'
      ',h_coin_ev BYTEA NOT NULL CHECK(LENGTH(h_coin_ev)=64)' -- UNIQUE'
      ',ev_sig BYTEA NOT NULL'
      ',ewv BYTEA NOT NULL'
      --  ,PRIMARY KEY (melt_serial_id, freshcoin_index) -- done per shard
    ') %s ;'
    ,table_name
    ,'PARTITION BY HASH (melt_serial_id)'
    ,shard_suffix
  );

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

  EXECUTE FORMAT (
    'CREATE INDEX IF NOT EXISTS ' || table_name || '_coins_by_melt_serial_id_index '
    'ON ' || table_name || ' '
    '(melt_serial_id);'
  );

END
$$;

CREATE OR REPLACE FUNCTION add_constraints_to_refresh_revealed_coins_partition(
  IN partition_suffix VARCHAR
)
RETURNS void
LANGUAGE plpgsql
AS $$
BEGIN
  EXECUTE FORMAT (
    'ALTER TABLE refresh_revealed_coins_' || partition_suffix || ' '
      'ADD CONSTRAINT refresh_revealed_coins_' || partition_suffix || '_rrc_serial_key '
        'UNIQUE (rrc_serial) '
      ',ADD CONSTRAINT refresh_revealed_coins_' || partition_suffix || '_coin_ev_key '
        'UNIQUE (coin_ev) '
      ',ADD CONSTRAINT refresh_revealed_coins_' || partition_suffix || '_h_coin_ev_key '
        'UNIQUE (h_coin_ev) '
      ',ADD PRIMARY KEY (melt_serial_id, freshcoin_index) '
  );
END
$$;