--
-- This file is part of TALER
-- Copyright (C) 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 FUNCTION create_table_age_withdraw_revealed_coins(
  IN partition_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'age_withdraw_revealed_coins';
BEGIN
  PERFORM create_partitioned_table(
    'CREATE TABLE %I'
      '(age_withdraw_revealed_coins_id BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE
      ',h_commitment BYTEA NOT NULL CHECK (LENGTH(h_commitment)=64)'
      ',coin_index INT4 NOT NULL'
      ',h_coin_ev BYTEA CHECK (LENGTH(h_coin_ev)=64)'
    ') %s ;'
    ,table_name
    ,'PARTITION BY HASH (h_coin_ev)'
    ,partition_suffix
  );
  PERFORM comment_partitioned_table(
     'Reveal of proofs of the correct age restriction after the commitment when withdrawing coins with age restriction'
    ,table_name
    ,partition_suffix
  );
  PERFORM comment_partitioned_column(
     'Foreign key reference to the corresponding commitment'
    ,'h_commitment'
    ,table_name
    ,partition_suffix
  );
  PERFORM comment_partitioned_column(
     'Index of the coin in the age-withdraw request, which is implicitly a batch request'
    ,'coin_index'
    ,table_name
    ,partition_suffix
  );
  PERFORM comment_partitioned_column(
     'Hash of the envelope of the new coin to be signed (for lookups).  The corresponding signatures are stores in age_withdraw_commitments.denom_sigs.'
    ,'h_coin_ev'
    ,table_name
    ,partition_suffix
  );
END
$$;

CREATE FUNCTION constrain_table_age_withdraw_revealed_coins(
  IN partition_suffix VARCHAR
)
RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'age_withdraw_revealed_coins';
BEGIN
  table_name = concat_ws('_', table_name, partition_suffix);

  EXECUTE FORMAT (
    'ALTER TABLE ' || table_name ||
    ' ADD CONSTRAINT ' || table_name || '_age_withdraw_revealed_coins_id_key'
    ' UNIQUE (age_withdraw_revealed_coins_id);'
  );
  EXECUTE FORMAT (
    'ALTER TABLE ' || table_name ||
    ' ADD CONSTRAINT ' || table_name || '_freshcoin_index_and_h_commitment_uniqueness'
    ' UNIQUE (freshcoin_index, h_commitment);'
  );
END
$$;

CREATE FUNCTION foreign_table_age_withdraw_revealed_coins()
RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'age_withdraw_revealed_coins';
BEGIN
  EXECUTE FORMAT (
    'ALTER TABLE ' || table_name ||
    ' ADD CONSTRAINT ' || table_name || '_foreign_h_commitment'
    ' FOREIGN KEY (h_commitment)'
    ' REFERENCES age_withdraw_commitments (h_commitment) ON DELETE CASCADE;'
  );
END
$$;


INSERT INTO exchange_tables
    (name
    ,version
    ,action
    ,partitioned
    ,by_range)
  VALUES
    ('age_withdraw_revealed_coins'
    ,'exchange-0003'
    ,'create'
    ,TRUE
    ,FALSE),
    ('age_withdraw_revealed_coins'
    ,'exchange-0003'
    ,'constrain'
    ,TRUE
    ,FALSE),
    ('age_withdraw_revealed_coins'
    ,'exchange-0003'
    ,'foreign'
    ,TRUE
    ,FALSE);
