import os
import sys
from logging.config import fileConfig

from alembic import context
from dotenv import load_dotenv
from sqlalchemy import engine_from_config, pool

BASE_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
if BASE_DIR not in sys.path:
    sys.path.append(BASE_DIR)

load_dotenv(os.path.join(BASE_DIR, ".env"))

from services.storage.db import Base  # noqa: E402
from services.storage.database_url import resolve_alembic_database_url  # noqa: E402


config = context.config
database_url = resolve_alembic_database_url(
    config.get_main_option("sqlalchemy.url"),
    os.getenv("DATABASE_URL"),
)
if database_url:
    if database_url.startswith("postgresql://"):
        try:
            import psycopg  # noqa: F401
        except ImportError:
            try:
                import psycopg2  # noqa: F401
                database_url = database_url.replace("postgresql://", "postgresql+psycopg2://", 1)
            except ImportError:
                pass
    config.set_main_option("sqlalchemy.url", database_url)
target_metadata = Base.metadata


def _configure_alembic_logging() -> None:
    if not config.config_file_name:
        return
    if config.attributes.get("skip_logging_config"):
        return
    fileConfig(config.config_file_name, disable_existing_loggers=False)


_configure_alembic_logging()


def run_migrations_offline():
    context.configure(
        url=config.get_main_option("sqlalchemy.url"),
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        render_as_batch=True,
    )
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online():
    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,
            render_as_batch=True,
        )

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


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