# import inspect
import os
#
from config import Config
from sqlalchemy import create_engine
# from contextlib import contextmanager
# from log import DEBUG
# from sqlalchemy.orm import (sessionmaker, scoped_session)
#
#
# class Counter:
#     def __init__(self):
#         self.count = 0
#
#     def __repr__(self):
#         return(f"<Counter({self.count=})>")
#
#     def inc(self):
#         self.count += 1
#         return self.count
#
#     def dec(self):
#         self.count -= 1
#         return self.count
#
#
MYSQL_CONNECT = os.environ.get('MM_DB')
if MYSQL_CONNECT is None:
    raise ValueError("MYSQL_CONNECT is undefined")

# MM_ENV = os.environ.get('MM_ENV', 'PRODUCTION')
# testing = False
#
# if MM_ENV == 'PRODUCTION':
#     dbname = os.environ.get('MM_PRODUCTION_DBNAME', 'musicmuster_prod')
#     dbuser = os.environ.get('MM_PRODUCTION_DBUSER', 'musicmuster')
#     dbpw = os.environ.get('MM_PRODUCTION_DBPW', 'musicmuster')
#     dbhost = os.environ.get('MM_PRODUCTION_DBHOST', 'localhost')
# elif MM_ENV == 'TESTING':
#     dbname = os.environ.get('MM_TESTING_DBNAME', 'musicmuster_testing')
#     dbuser = os.environ.get('MM_TESTING_DBUSER', 'musicmuster_testing')
#     dbpw = os.environ.get('MM_TESTING_DBPW', 'musicmuster_testing')
#     dbhost = os.environ.get('MM_TESTING_DBHOST', 'localhost')
#     testing = True
# elif MM_ENV == 'DEVELOPMENT':
#     dbname = os.environ.get('MM_DEVELOPMENT_DBNAME', 'musicmuster_dev')
#     dbuser = os.environ.get('MM_DEVELOPMENT_DBUSER', 'musicmuster')
#     dbpw = os.environ.get('MM_DEVELOPMENT_DBPW', 'musicmuster')
#     dbhost = os.environ.get('MM_DEVELOPMENT_DBHOST', 'localhost')
# else:
#     raise ValueError(f"Unknown MusicMuster environment: {MM_ENV=}")
#
# DEBUG(f"Using {dbname} database")
# MYSQL_CONNECT = f"mysql+mysqldb://{dbuser}:{dbpw}@{dbhost}/{dbname}"
#
engine = create_engine(
    MYSQL_CONNECT,
    encoding='utf-8',
    echo=Config.DISPLAY_SQL,
    pool_pre_ping=True,
    future=True
)
#
# #
# # @contextmanager
# # def Session():
# #     frame = inspect.stack()[2]
# #     file = frame.filename
# #     function = frame.function
# #     lineno = frame.lineno
# #     Session = scoped_session(sessionmaker(bind=engine, future=True))
# #     DEBUG(f"Session acquired, {file=}, {function=}, {lineno=}, {Session=}")
# #     yield Session
# #     DEBUG(" Session released")
# #     Session.commit()
# #     Session.close()