import re
from unittest import TestCase, mock

from dbt.adapters.base.query_headers import MacroQueryStringSetter

from test.unit.utils import config_from_parts_or_dicts


class TestQueryHeaders(TestCase):

    def setUp(self):
        self.profile_cfg = {
            'outputs': {
                'test': {
                    'type': 'postgres',
                    'dbname': 'postgres',
                    'user': 'test',
                    'host': 'test',
                    'pass': 'test',
                    'port': 5432,
                    'schema': 'test'
                },
            },
            'target': 'test'
        }
        self.project_cfg = {
            'name': 'query_headers',
            'version': '0.1',
            'profile': 'test',
        }
        self.query = "SELECT 1;"

    def test_comment_should_prepend_query_by_default(self):
        config = config_from_parts_or_dicts(self.project_cfg, self.profile_cfg)
        query_header = MacroQueryStringSetter(config, mock.MagicMock(macros={}))
        sql = query_header.add(self.query)
        self.assertTrue(re.match(f'^\/\*.*\*\/\n{self.query}$', sql))


    def test_append_comment(self):
        self.project_cfg.update({
            'query-comment': {
                'comment': 'executed by dbt',
                'append': True
            }
        })
        config = config_from_parts_or_dicts(self.project_cfg, self.profile_cfg)
        query_header = MacroQueryStringSetter(config, mock.MagicMock(macros={}))
        sql = query_header.add(self.query)
        self.assertEqual(sql, f'{self.query[:-1]}\n/* executed by dbt */;')

    def test_disable_query_comment(self):
        self.project_cfg.update({
            'query-comment': ''
        })
        config = config_from_parts_or_dicts(self.project_cfg, self.profile_cfg)
        query_header = MacroQueryStringSetter(config, mock.MagicMock(macros={}))
        self.assertEqual(query_header.add(self.query), self.query)