#coding:utf-8

"""
ID:          issue-7980
ISSUE:       https://github.com/FirebirdSQL/firebird/issues/7980
TITLE:       Option for GEN_UUID to generate v7 UUID
DESCRIPTION:
    Test verifies:
    * ability to call function GEN_UUID() with argument (value = 7);
    * orderliness of generated UUID values according to requirements of v7.

    UUID v7 values have prefix (first 13 bytes) which monotonically grows.
    If we generate some number of such UUIDs and write them into the table with integer PK
    then this PK and value of row_number()over(order by left(uuid_v7,13)) must be EQUAL
    for all records.
    Otherwise generated UUID does not match to v7 requirement.
NOTES:
    [10.07.2024] pzotov
    Checked on 6.0.0.386
"""

import pytest
from firebird.qa import *

init_script = f"""
    recreate table test (
        id int generated by default as identity constraint pk_test primary key
        ,uuid_v7 varchar(36) unique
    );

    recreate view v_check as
    with
    a as (
        select id, row_number()over(order by left(uuid_v7,13)) rn, uuid_v7 from test
    )
    select * from a where id <> rn
    ;

    insert into test(uuid_v7) select uuid_to_char(gen_uuid(7)) from rdb$types rows 50;
    commit;
"""

db = db_factory(init=init_script)
act = python_act('db')

expected_stdout = f"""
"""

@pytest.mark.version('>=6.0')
def test_1(act: Action, capsys):
    with act.db.connect() as con:
        cur =  con.cursor()
        cur.execute('select 1 from v_check')
        violates_v7 = cur.fetchone()
        if violates_v7:
            print('SOME UUIDs DO NOT MEET UUID v7 REQUIREMENTS:')
            cur.execute('select id, uuid_v7 from v_check')
            act.print_data(cur)
   
    act.expected_stdout = expected_stdout
    act.stdout = capsys.readouterr().out # must be EMPTY!
    assert act.clean_stdout == act.clean_expected_stdout