"""Alembic environment configuration for database migrations."""
from logging.config import fileConfig

from sqlalchemy import engine_from_config, pool
from alembic import context

import os
import sys

# Add backend directory to path
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))

from app.config import get_settings
from app.models.base import Base
from app.models import Agent, Run, Event  # noqa: F401

config = context.config

if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Get database URL from settings
settings = get_settings()
db_url = settings.database_url
# Convert async SQLite URL to sync URL for migrations
if db_url.startswith("sqlite+aiosqlite://"):
    db_url = db_url.replace("sqlite+aiosqlite://", "sqlite://")

config.set_main_option("sqlalchemy.url", db_url)
target_metadata = Base.metadata


def run_migrations_offline() -> None:
    """Run migrations in offline mode."""
    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."""
    configuration = config.get_section(config.config_ini_section)
    configuration["sqlalchemy.url"] = config.get_main_option("sqlalchemy.url")

    connectable = engine_from_config(
        configuration,
        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()
