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"""Low-level ADBC bindings for the DuckDB driver."""

import enum
import functools
import importlib.util
import typing

import adbc_driver_manager


class StatementOptions(enum.Enum):
    """Statement options specific to the DuckDB driver."""

    #: The number of rows per batch. Defaults to 2048.
    BATCH_ROWS = "adbc.duckdb.query.batch_rows"


def connect(path: typing.Optional[str] = None) -> adbc_driver_manager.AdbcDatabase:
    """Create a low level ADBC connection to DuckDB."""
    if path is None:
        return adbc_driver_manager.AdbcDatabase(driver=driver_path(), entrypoint="duckdb_adbc_init")
    return adbc_driver_manager.AdbcDatabase(driver=driver_path(), entrypoint="duckdb_adbc_init", path=path)


@functools.cache
def driver_path() -> str:
    """Get the path to the DuckDB ADBC driver."""
    duckdb_module_spec = importlib.util.find_spec("_duckdb")
    if duckdb_module_spec is None:
        msg = "Could not find duckdb shared library. Did you pip install duckdb?"
        raise ImportError(msg)
    return duckdb_module_spec.origin