#coding:utf-8
#
# id:           bugs.core_6138
# title:        Inconsistent behavior regarding visibility of master record on detail inserts
# decription:
#                   Confirmed bug on: 3.0.5.33152 (built 14.09.19), 4.0.0.1598 (built 08.09.19):
#                   no error raised when second attach tried to insert record into child table
#                   after first attach did commit (but main record was not visible to 2nd attach
#                   because of SNAPSHOT isolation level).
#
#                   Works fine on:
#                       4.0.0.1639 SS: 1.745s.
#                       4.0.0.1633 CS: 2.266s.
#                       3.0.5.33183 SS: 1.265s.
#                       3.0.5.33178 CS: 1.611s.
#
# tracker_id:   CORE-6138
# min_versions: ['3.0.5']
# versions:     3.0.5
# qmid:         None

import pytest
from firebird.qa import db_factory, python_act, Action
from firebird.driver import tpb, Isolation, DatabaseError

# version: 3.0.5
# resources: None

substitutions_1 = [('[ \t]+', ' ')]

init_script_1 = """"""

db_1 = db_factory(sql_dialect=3, init=init_script_1)

# test_script_1
#---
#
#  import os
#  import sys
#
#  os.environ["ISC_USER"] = user_name
#  os.environ["ISC_PASSWORD"] = user_password
#  db_conn.close()
#
#  custom_tpb = fdb.TPB()
#  custom_tpb.isolation_level = fdb.isc_tpb_concurrency
#  custom_tpb.lock_resolution = fdb.isc_tpb_nowait
#
#  con1=fdb.connect( dsn = dsn )
#  con2=fdb.connect( dsn = dsn )
#  con2.begin( tpb = custom_tpb )
#
#  #print( 'FDB version: ' + fdb.__version__ )
#  #print( 'Firebird version: ' + con1.firebird_version )
#
#  con1.execute_immediate( 'create table a (id int primary key)' )
#  con1.execute_immediate( 'create table b (id int primary key, id_a int, constraint fk_b__a foreign key(id_a) references a(id) on update cascade on delete cascade)' )
#  con1.commit()
#
#  con1.begin( tpb = custom_tpb )
#  cur1=con1.cursor()
#  cur1.execute('insert into a(id) values( ? )', ( 1, ) )
#
#  con2.commit()
#  con2.begin(tpb = custom_tpb )
#  cur2=con2.cursor()
#  cur2.execute('select id from a')
#
#  con1.commit()
#  try:
#    cur2.execute( 'insert into b (id, id_a) values (?, ?)', (1, 1,) )
#    print('UNEXPECTED SUCCESS: CHILD RECORD INSERTED W/O ERROR.')
#  except Exception as e:
#
#      print( ('EXPECTED: FK violation encountered.' if '335544466' in repr(e) else 'Unknown/unexpected exception.') )
#
#      # print( x for x in e ) # Python 3.x:  TypeError: 'DatabaseError' object is not iterable
#      # print( e[0] ) # Python 3.x: TypeError: 'DatabaseError' object is not subscriptable
#
#  finally:
#    cur2.close()
#
#  con2.close()
#
#  cur1.close()
#  con1.close()
#
#
#---

act_1 = python_act('db_1', substitutions=substitutions_1)

@pytest.mark.version('>=3.0.5')
def test_1(act_1: Action):
    custom_tpb = tpb(isolation=Isolation.CONCURRENCY, lock_timeout=0)
    with act_1.db.connect() as con1, act_1.db.connect() as con2:
        con2.begin(custom_tpb)

        con1.execute_immediate('create table a (id int primary key)')
        con1.execute_immediate('create table b (id int primary key, id_a int, constraint fk_b__a foreign key(id_a) references a(id) on update cascade on delete cascade)')
        con1.commit()

        con1.begin(custom_tpb)
        cur1 = con1.cursor()
        cur1.execute('insert into a(id) values( ? )', [1])

        con2.commit()
        con2.begin(custom_tpb)
        cur2 = con2.cursor()
        cur2.execute('select id from a')

        con1.commit()

        with pytest.raises(DatabaseError, match='.*violation of FOREIGN KEY constraint.*'):
            cur2.execute('insert into b (id, id_a) values (?, ?)', [1, 1])