#coding:utf-8

"""
ID:          issue-1479
ISSUE:       https://github.com/FirebirdSQL/firebird/issues/1479
TITLE:       ALTER DOMAIN and ALTER TABLE don't allow to change character set and/or collation
DESCRIPTION:
NOTES:
    [12.04.2024] pzotov
    Example from https://github.com/FirebirdSQL/firebird/issues/7924#issue-2046076122
    Check solved issue about case when we change table fields type using:
        alter table test
            alter column fld_domain_defined type varchar(10) character set win1250
           ,alter column fld_explicit_type1 type varchar(10) character set win1252
           ,alter column fld_explicit_type2 type varchar(10) character set win1257
        ;
    Before fix column types were NOT changed in this case and remains previous data:
          FLD_DOMAIN_DEFINED VARCHAR(10) CHARACTER SET UTF8 COLLATE UNICODE_CI_AI Nullable // why not win1250 ?
          FLD_EXPLICIT_TYPE1 VARCHAR(10) CHARACTER SET WIN1257 COLLATE WIN1257_EE Nullable // why not win1252 ?
          FLD_EXPLICIT_TYPE2 VARCHAR(10) CHARACTER SET UTF8 COLLATE UNICODE_CI Nullable    // why not win1257 ?
   Initially report was sent to Adriano, Dmitry et al, 05-oct-2023 08:18.
   Fix 22-JAN-2024 17:42 in: https://github.com/FirebirdSQL/firebird/commit/11dec10f9fc079ed74d623211e01f465e45d6a7c
"""

import pytest
from firebird.qa import *

db = db_factory(charset = 'win1251')

test_script = """
    set bail on;
    set list on;
    create view v_domain_info as
    select
        f.rdb$field_name as dm_name
        ,f.rdb$field_length as dm_size
        ,f.rdb$character_length as dm_char_len
        ,f.rdb$character_set_id as dm_cset_id
        ,f.rdb$collation_id as dm_coll_id
        ,c.rdb$character_set_name as dm_cset_name
        --,c.rdb$default_collate_name as dm_default_coll_name
        --,k.rdb$base_collation_name
        ,k.rdb$collation_name as dm_coll_name
    from rdb$fields f
    join rdb$character_sets c on f.rdb$character_set_id = c.rdb$character_set_id
    join rdb$collations k on c.rdb$character_set_id = k.rdb$character_set_id and f.rdb$collation_id = k.rdb$collation_id
    where f.rdb$field_name = upper('dm_test')
    ;

    create view v_fields_info as
    select
        rf.rdb$field_name as field_name
        -- ,rf.rdb$field_source
        -- ,rf.rdb$field_position
        ,f.rdb$character_length as field_char_len
        ,f.rdb$character_set_id as field_cset_id
        ,f.rdb$collation_id as field_coll_id
        ,c.rdb$character_set_name as cset_name
        --,c.rdb$default_collate_name
        --,k.rdb$base_collation_name
        ,k.rdb$collation_name as field_collation
        --,k.rdb$collation_id
    from rdb$relation_fields rf
    join rdb$fields f on rf.rdb$field_source = f.rdb$field_name
    join rdb$character_sets c on f.rdb$character_set_id = c.rdb$character_set_id
    join rdb$collations k on c.rdb$character_set_id = k.rdb$character_set_id and f.rdb$collation_id = k.rdb$collation_id
    where rf.rdb$relation_name = upper('TEST')
    order by
         field_name
        ,field_cset_id
        ,field_coll_id
    ;

    ---------------------------------------------------------------
    alter character set utf8 set default collation unicode_ci;
    alter character set win1252 set default collation pxw_span;
    alter character set win1257 set default collation win1257_ee;
    commit;
     
    create domain dm_test varchar(10) character set win1252;
    create table test(
        fld_domain_defined dm_test
       ,fld_explicit_type1 varchar(10) character set win1257
       ,fld_explicit_type2 varchar(10) character set utf8
    );
    commit;

    ---------------------------------------------------------------

    alter character set utf8 set default collation unicode_ci_ai;
    alter character set win1252 set default collation pxw_swedfin;
    alter character set win1257 set default collation win1257_lv;
    commit;
     
    alter domain dm_test type varchar(10) character set utf8;
    commit;

    alter table test
        alter column fld_domain_defined type varchar(10) character set win1250
       ,alter column fld_explicit_type1 type varchar(10) character set win1252
       ,alter column fld_explicit_type2 type varchar(10) character set win1257
    ;
    commit;

    select 'domain_info' as msg, v.* from v_domain_info v;
    select 'table info' as msg, v.* from v_fields_info v;
"""

act = isql_act('db', test_script)

expected_stdout = """
    MSG                             domain_info
    DM_NAME                         DM_TEST
    DM_SIZE                         40
    DM_CHAR_LEN                     10
    DM_CSET_ID                      4
    DM_COLL_ID                      4
    DM_CSET_NAME                    UTF8
    DM_COLL_NAME                    UNICODE_CI_AI

    MSG                             table info
    FIELD_NAME                      FLD_DOMAIN_DEFINED
    FIELD_CHAR_LEN                  10
    FIELD_CSET_ID                   51
    FIELD_COLL_ID                   0
    CSET_NAME                       WIN1250
    FIELD_COLLATION                 WIN1250

    MSG                             table info
    FIELD_NAME                      FLD_EXPLICIT_TYPE1
    FIELD_CHAR_LEN                  10
    FIELD_CSET_ID                   53
    FIELD_COLL_ID                   5
    CSET_NAME                       WIN1252
    FIELD_COLLATION                 PXW_SWEDFIN

    MSG                             table info
    FIELD_NAME                      FLD_EXPLICIT_TYPE2
    FIELD_CHAR_LEN                  10
    FIELD_CSET_ID                   60
    FIELD_COLL_ID                   3
    CSET_NAME                       WIN1257
    FIELD_COLLATION                 WIN1257_LV
"""

@pytest.mark.version('>=6')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.execute(combine_output = True)
    assert act.clean_stdout == act.clean_expected_stdout