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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from __future__ import annotations

from typing import Any
from urllib import parse

from sqlalchemy.engine.url import make_url, URL  # noqa: F401

from superset.db_engine_specs.base import BaseEngineSpec


class TDengineEngineSpec(BaseEngineSpec):
    engine = "taosws"
    engine_name = "TDengine"
    max_column_name_length = 64
    default_driver = "taosws"
    sqlalchemy_uri_placeholder = (
        "taosws://user:******@host:port/dbname[?key=value&key=value...]"
    )

    # time grain
    _time_grain_expressions = {
        None: "{col}",
        "PT1S": "TIMETRUNCATE({col}, 1s, 0)",
        "PT1M": "TIMETRUNCATE({col}, 1m, 0)",
        "PT1H": "TIMETRUNCATE({col}, 1h, 0)",
        "P1D": "TIMETRUNCATE({col}, 1d, 0)",
        "P1W": "TIMETRUNCATE({col}, 1w, 0)",
    }

    @classmethod
    def get_schema_from_engine_params(
        cls,
        sqlalchemy_uri: URL,
        connect_args: dict[str, Any],
    ) -> str | None:
        """
        Return the configured schema.

        A TDengine database is a SQLAlchemy schema.
        """
        return parse.unquote(sqlalchemy_uri.database)