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# to you under the Apache License, Version 2.0 (the
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#
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from datetime import datetime
from typing import Any, Optional

import pytest
from pytest_mock import MockFixture
from sqlalchemy import types
from sqlalchemy.dialects.postgresql import DOUBLE_PRECISION, ENUM, JSON
from sqlalchemy.engine.url import make_url

from superset.exceptions import SupersetSecurityException
from superset.utils.core import GenericDataType
from tests.unit_tests.db_engine_specs.utils import (
    assert_column_spec,
    assert_convert_dttm,
)
from tests.unit_tests.fixtures.common import dttm


@pytest.mark.parametrize(
    "target_type,expected_result",
    [
        ("Date", "TO_DATE('2019-01-02', 'YYYY-MM-DD')"),
        (
            "DateTime",
            "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')",
        ),
        (
            "TimeStamp",
            "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')",
        ),
        ("UnknownType", None),
    ],
)
def test_convert_dttm(
    target_type: str, expected_result: Optional[str], dttm: datetime
) -> None:
    from superset.db_engine_specs.postgres import PostgresEngineSpec as spec

    assert_convert_dttm(spec, target_type, expected_result, dttm)


@pytest.mark.parametrize(
    "native_type,sqla_type,attrs,generic_type,is_dttm",
    [
        ("SMALLINT", types.SmallInteger, None, GenericDataType.NUMERIC, False),
        ("INTEGER", types.Integer, None, GenericDataType.NUMERIC, False),
        ("BIGINT", types.BigInteger, None, GenericDataType.NUMERIC, False),
        ("DECIMAL", types.Numeric, None, GenericDataType.NUMERIC, False),
        ("NUMERIC", types.Numeric, None, GenericDataType.NUMERIC, False),
        ("REAL", types.REAL, None, GenericDataType.NUMERIC, False),
        ("DOUBLE PRECISION", DOUBLE_PRECISION, None, GenericDataType.NUMERIC, False),
        ("MONEY", types.Numeric, None, GenericDataType.NUMERIC, False),
        # String
        ("CHAR", types.String, None, GenericDataType.STRING, False),
        ("VARCHAR", types.String, None, GenericDataType.STRING, False),
        ("TEXT", types.String, None, GenericDataType.STRING, False),
        ("ARRAY", types.String, None, GenericDataType.STRING, False),
        ("ENUM", ENUM, None, GenericDataType.STRING, False),
        ("JSON", JSON, None, GenericDataType.STRING, False),
        # Temporal
        ("DATE", types.Date, None, GenericDataType.TEMPORAL, True),
        ("TIMESTAMP", types.TIMESTAMP, None, GenericDataType.TEMPORAL, True),
        ("TIME", types.Time, None, GenericDataType.TEMPORAL, True),
        # Boolean
        ("BOOLEAN", types.Boolean, None, GenericDataType.BOOLEAN, False),
    ],
)
def test_get_column_spec(
    native_type: str,
    sqla_type: type[types.TypeEngine],
    attrs: Optional[dict[str, Any]],
    generic_type: GenericDataType,
    is_dttm: bool,
) -> None:
    from superset.db_engine_specs.postgres import PostgresEngineSpec as spec

    assert_column_spec(spec, native_type, sqla_type, attrs, generic_type, is_dttm)


def test_get_schema_from_engine_params() -> None:
    """
    Test the ``get_schema_from_engine_params`` method.
    """
    from superset.db_engine_specs.postgres import PostgresEngineSpec

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"), {}
        )
        is None
    )

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-csearch_path=secret"},
        )
        == "secret"
    )

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-c search_path = secret -cfoo=bar -c debug"},
        )
        == "secret"
    )

    with pytest.raises(Exception) as excinfo:
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-csearch_path=secret,public"},
        )
    assert str(excinfo.value) == (
        "Multiple schemas are configured in the search path, which means "
        "Superset is unable to determine the schema of unqualified table "
        "names and enforce permissions."
    )


def test_get_prequeries() -> None:
    """
    Test the ``get_prequeries`` method.
    """
    from superset.db_engine_specs.postgres import PostgresEngineSpec

    assert PostgresEngineSpec.get_prequeries() == []
    assert PostgresEngineSpec.get_prequeries(schema="test") == [
        'set search_path = "test"'
    ]


def test_get_default_schema_for_query(mocker: MockFixture) -> None:
    """
    Test the ``get_default_schema_for_query`` method.
    """
    from superset.db_engine_specs.postgres import PostgresEngineSpec

    database = mocker.MagicMock()
    query = mocker.MagicMock()

    query.sql = "SELECT * FROM some_table"
    query.schema = "foo"
    assert PostgresEngineSpec.get_default_schema_for_query(database, query) == "foo"

    query.sql = """
set
-- this is a tricky comment
search_path -- another one
= bar;
SELECT * FROM some_table;
    """
    with pytest.raises(SupersetSecurityException) as excinfo:
        PostgresEngineSpec.get_default_schema_for_query(database, query)
    assert (
        str(excinfo.value)
        == "Users are not allowed to set a search path for security reasons."
    )