import re
from typing import Union

from colossalqa.mylogging import get_logger
from sqlalchemy import Engine, MetaData, create_engine
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy.ext.declarative import declarative_base

logger = get_logger()


def drop_table(engine: Engine) -> None:
    """
    Drop all existing table
    """
    Base = declarative_base()
    metadata = MetaData()
    metadata.reflect(bind=engine)
    for key in metadata.tables:
        table = metadata.tables[key]
        if table is not None:
            Base.metadata.drop_all(engine, [table], checkfirst=True)


def create_empty_sql_database(database_uri):
    try:
        # Create an SQLAlchemy engine to connect to the database
        engine = create_engine(database_uri)

        # Create the database
        engine.connect()

        logger.info(f"Database created at {database_uri}")
    except SQLAlchemyError as e:
        logger.error(f"Error creating database: {str(e)}")
    return engine, database_uri


def destroy_sql_database(sql_engine: Union[Engine, str]) -> None:
    """
    Destroy an sql database
    """
    if isinstance(sql_engine, str):
        sql_engine = create_engine(sql_engine)
    drop_table(sql_engine)
    sql_engine.dispose()
    sql_engine = None


def detect_lang_naive(s):
    """
    Naive function for language detection, should be replaced by an independent layer
    """
    remove_nota = "[’·°–!\"#$%&'()*+,-./:;<=>?@，。?★、…【】（）《》？“”‘’！[\\]^_`{|}~]+"
    s = re.sub(remove_nota, "", s)
    s = re.sub("[0-9]", "", s).strip()
    res = re.sub("[a-zA-Z]", "", s).strip()
    if len(res) <= 0:
        return "en"
    else:
        return "zh"