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#
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# pylint: disable=unused-argument, import-outside-toplevel, protected-access
from datetime import datetime
from typing import Optional

import pytest

from tests.unit_tests.db_engine_specs.utils import assert_convert_dttm
from tests.unit_tests.fixtures.common import dttm


@pytest.mark.parametrize(
    "sql,expected",
    [
        ("SELECT foo FROM tbl", True),
        ("SHOW TABLES", False),
        ("EXPLAIN SELECT foo FROM tbl", False),
        ("INSERT INTO tbl (foo) VALUES (1)", False),
    ],
)
def test_sql_is_readonly_query(sql: str, expected: bool) -> None:
    """
    Make sure that SQL dialect consider only SELECT statements as read-only
    """

    from superset.db_engine_specs.kusto import KustoSqlEngineSpec
    from superset.sql_parse import ParsedQuery

    parsed_query = ParsedQuery(sql)
    is_readonly = KustoSqlEngineSpec.is_readonly_query(parsed_query)

    assert expected == is_readonly


@pytest.mark.parametrize(
    "kql,expected",
    [
        ("tbl | limit 100", True),
        ("let foo = 1; tbl | where bar == foo", True),
        (".show tables", False),
    ],
)
def test_kql_is_select_query(kql: str, expected: bool) -> None:
    """
    Make sure that KQL dialect consider only statements that do not start with "." (dot)
    as a SELECT statements
    """

    from superset.db_engine_specs.kusto import KustoKqlEngineSpec
    from superset.sql_parse import ParsedQuery

    parsed_query = ParsedQuery(kql)
    is_select = KustoKqlEngineSpec.is_select_query(parsed_query)

    assert expected == is_select


@pytest.mark.parametrize(
    "kql,expected",
    [
        ("tbl | limit 100", True),
        ("let foo = 1; tbl | where bar == foo", True),
        (".show tables", True),
        ("print 1", True),
        ("set querytrace; Events | take 100", True),
        (".drop table foo", False),
        (".set-or-append table foo <| bar", False),
    ],
)
def test_kql_is_readonly_query(kql: str, expected: bool) -> None:
    """
    Make sure that KQL dialect consider only SELECT statements as read-only
    """

    from superset.db_engine_specs.kusto import KustoKqlEngineSpec
    from superset.sql_parse import ParsedQuery

    parsed_query = ParsedQuery(kql)
    is_readonly = KustoKqlEngineSpec.is_readonly_query(parsed_query)

    assert expected == is_readonly


def test_kql_parse_sql() -> None:
    """
    parse_sql method should always return a list with a single element
    which is an original query
    """

    from superset.db_engine_specs.kusto import KustoKqlEngineSpec

    queries = KustoKqlEngineSpec.parse_sql("let foo = 1; tbl | where bar == foo")

    assert queries == ["let foo = 1; tbl | where bar == foo"]


@pytest.mark.parametrize(
    "target_type,expected_result",
    [
        ("DateTime", "datetime(2019-01-02T03:04:05.678900)"),
        ("TimeStamp", "datetime(2019-01-02T03:04:05.678900)"),
        ("Date", "datetime(2019-01-02)"),
        ("UnknownType", None),
    ],
)
def test_kql_convert_dttm(
    target_type: str, expected_result: Optional[str], dttm: datetime
) -> None:
    from superset.db_engine_specs.kusto import KustoKqlEngineSpec as spec

    assert_convert_dttm(spec, target_type, expected_result, dttm)


@pytest.mark.parametrize(
    "target_type,expected_result",
    [
        ("Date", "CONVERT(DATE, '2019-01-02', 23)"),
        ("DateTime", "CONVERT(DATETIME, '2019-01-02T03:04:05.678', 126)"),
        ("SmallDateTime", "CONVERT(SMALLDATETIME, '2019-01-02 03:04:05', 20)"),
        ("TimeStamp", "CONVERT(TIMESTAMP, '2019-01-02 03:04:05', 20)"),
        ("UnknownType", None),
    ],
)
def test_sql_convert_dttm(
    target_type: str, expected_result: Optional[str], dttm: datetime
) -> None:
    from superset.db_engine_specs.kusto import KustoSqlEngineSpec as spec

    assert_convert_dttm(spec, target_type, expected_result, dttm)