# isort: skip_file
from alembic import context
from sqlalchemy import pool
from sqlalchemy import engine_from_config
from logging.config import fileConfig
from dotenv import load_dotenv
from models.models import Base
import os
import sys
sys.path.insert(0, '/workspace')
print("sys.path:", sys.path)
print("models dir exists:", os.path.isdir('/workspace/models'))
print("models/models.py exists:", os.path.isfile('/workspace/models/models.py'))
print("models/__init__.py exists:",
      os.path.isfile('/workspace/models/__init__.py'))

print("sys.path:", sys.path)
print("models dir exists:", os.path.isdir('/workspace/models'))
print("models/models.py exists:", os.path.isfile('/workspace/models/models.py'))
print("models/__init__.py exists:",
      os.path.isfile('/workspace/models/__init__.py'))

# .env laden (optional)
env_path = os.path.abspath(os.path.join(
    os.path.dirname(__file__), '../../.env'))
print(f"Loading environment variables from: {env_path}")
load_dotenv(env_path)

DB_CONN = os.getenv("DB_CONN")
if DB_CONN:
    DATABASE_URL = DB_CONN
else:
    # Datenbank-Zugangsdaten aus .env
    DB_USER = os.getenv("DB_USER")
    DB_PASSWORD = os.getenv("DB_PASSWORD")
    DB_HOST = os.getenv("DB_HOST", "db")  # Default jetzt 'db'
    DB_PORT = os.getenv("DB_PORT", "3306")
    DB_NAME = os.getenv("DB_NAME")
    DATABASE_URL = f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}"

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

print(f"Using DATABASE_URL: {DATABASE_URL}")

config.set_main_option("sqlalchemy.url", DATABASE_URL)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.


def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection, target_metadata=target_metadata
        )

        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()
