#coding:utf-8

"""
ID:          issue-5268
ISSUE:       5268
TITLE:       Detach using Linux client takes much longer than from Windows
DESCRIPTION:
  We measure APPROXIMATE time that is required for detaching from database by evaluating number of seconds that passed
  from UNIX standard epoch time inside ISQL and writing it to log. After returning control from ISQL we evaluate again
  that number by calling Python 'time.time()' - and it will return value upto current UTC time, i.e. it WILL take in
  account local timezone from OS settings (this is so at least on Windows). Thus we have to add/substract time shift
  between UTC and local time - this is done by 'time.timezone' command.
  On PC-host with CPU 3.0 GHz and 2Gb RAM) in almost all cases difference was less than 1000 ms, so it was decided
  to set MAX_DETACH_TIME_THRESHOLD = 1200 ms.
JIRA:        CORE-4977
FBTEST:      bugs.core_4977
"""

import pytest
import time
from firebird.qa import *

db = db_factory()

act = python_act('db')

@pytest.mark.version('>=3.0')
def test_1(act: Action):
    MAX_DETACH_TIME_THRESHOLD=1200
    act.script = """
    set list on;
    select datediff(second from timestamp '01.01.1970 00:00:00.000' to current_timestamp) as " "
    from rdb$types rows 1;
    """
    act.execute()
    ms_before_detach = 0
    for line in act.stdout.splitlines():
        # ::: NB  ::: do NOT remove "and line.split()[0].isdigit()" if decide to replace subprocess.call()
        # with pipe-way like: runProgram('isql',[dsn,'-q','-o',sqllog.name], sqltxt) !!
        # String like: 'Database ....' does appear first in log instead of result!
        splitted = line.split()
        if splitted and splitted[0].isdigit():
            ms_before_detach = int(splitted[0])
    detach_during_ms = int((time.time() - ms_before_detach - time.timezone) * 1000)
    assert detach_during_ms < MAX_DETACH_TIME_THRESHOLD