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from __future__ import annotations

from typing import Callable, TYPE_CHECKING
from unittest.mock import MagicMock, Mock, PropertyMock

from flask import current_app, Flask
from flask.ctx import AppContext
from pytest import fixture

from superset.app import create_app
from tests.example_data.data_loading.pandas.pandas_data_loader import PandasDataLoader
from tests.example_data.data_loading.pandas.pands_data_loading_conf import (
    PandasLoaderConfigurations,
)
from tests.example_data.data_loading.pandas.table_df_convertor import (
    TableToDfConvertorImpl,
)
from tests.integration_tests.test_app import app

SUPPORT_DATETIME_TYPE = "support_datetime_type"

if TYPE_CHECKING:
    from sqlalchemy.engine import Engine

    from superset.connectors.sqla.models import Database
    from tests.example_data.data_loading.base_data_loader import DataLoader
    from tests.example_data.data_loading.pandas.pandas_data_loader import (
        TableToDfConvertor,
    )

pytest_plugins = "tests.fixtures"

PRESTO = "presto"
BACKEND_PROPERTY_VALUE = "sqlite"


@fixture(scope="session")
def example_db_provider() -> Callable[[], Database]:
    def mock_provider() -> Mock:
        mock = MagicMock()
        type(mock).backend = PropertyMock(return_value=BACKEND_PROPERTY_VALUE)
        return mock

    return mock_provider


@fixture(scope="session")
def example_db_engine(example_db_provider: Callable[[], Database]) -> Engine:
    with app.app_context():
        with example_db_provider().get_sqla_engine_with_context() as engine:
            return engine


@fixture(scope="session")
def pandas_loader_configuration(
    support_datetime_type,
) -> PandasLoaderConfigurations:
    return PandasLoaderConfigurations.make_from_dict(
        {SUPPORT_DATETIME_TYPE: support_datetime_type}
    )


@fixture(scope="session")
def support_datetime_type(example_db_provider: Callable[[], Database]) -> bool:
    return example_db_provider().backend != PRESTO


@fixture(scope="session")
def table_to_df_convertor(
    pandas_loader_configuration: PandasLoaderConfigurations,
) -> TableToDfConvertor:
    return TableToDfConvertorImpl(
        not pandas_loader_configuration.support_datetime_type,
        pandas_loader_configuration.strftime,
    )


@fixture(scope="session")
def data_loader(
    example_db_engine: Engine,
    pandas_loader_configuration: PandasLoaderConfigurations,
    table_to_df_convertor: TableToDfConvertor,
) -> DataLoader:
    return PandasDataLoader(
        example_db_engine, pandas_loader_configuration, table_to_df_convertor
    )