#coding:utf-8

"""
ID:          issue-5475
ISSUE:       5475
TITLE:       Invalid computed by definition generated by isql -x
DESCRIPTION:
  We create table and then run ISQL with '-x' key and saving its output to file.
  This operation should NOT produce any error (see var. 'f_xmeta_err').
  Then we drop table and run ISQL again but for APPLYING extracted metadata.
  If "ISQL -x" will produce script with invalid syntax, compiler will raise error.
JIRA:        CORE-5194
FBTEST:      bugs.core_5194
"""

import pytest
from firebird.qa import *

init_script = """
recreate table test(a timestamp, b computed by (current_timestamp - a));
"""

db = db_factory(init=init_script)

act = python_act('db', substitutions=[('.* line \\d+ .*', '')])

test_script = """
    set list on;
    select
        rf.rdb$field_name
        ,ff.rdb$field_length
        ,ff.rdb$field_scale
        ,ff.rdb$field_type
        ,cast(ff.rdb$computed_source as varchar(100)) as rdb$computed_source
    from rdb$relation_fields rf
    join rdb$fields ff on rf.rdb$field_source = ff.rdb$field_name
    where rf.rdb$relation_name='TEST'
    order by rdb$field_name;
"""

expected_stdout = """
    RDB$FIELD_NAME                  A
    RDB$FIELD_LENGTH                8
    RDB$FIELD_SCALE                 0
    RDB$FIELD_TYPE                  35
    RDB$COMPUTED_SOURCE             <null>
    RDB$FIELD_NAME                  B
    RDB$FIELD_LENGTH                8
    RDB$FIELD_SCALE                 -9
    RDB$FIELD_TYPE                  16
    RDB$COMPUTED_SOURCE             (current_timestamp - a)
"""

@pytest.mark.version('>=3.0')
def test_1(act: Action):
    act.isql(switches=['-x'])
    init_meta = act.stdout
    #
    with act.db.connect() as att1:
        cur1 = att1.cursor()
        cur1.execute("drop table test")
        att1.commit()
    #
    act.reset()
    act.isql(switches=[], input=init_meta)
    assert act.clean_stdout == ''
    # This should issue DDL of table TEST which was just created by extracted metadata:
    act.reset()
    act.expected_stdout = expected_stdout
    act.isql(switches=['-q'], input= test_script)
    assert act.clean_stdout == act.clean_expected_stdout