"""Alembic environment configuration.

This module is used by Alembic to manage database migrations.
"""

from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from alembic import context
import sys
from pathlib import Path

# Add project root to path
project_root = Path(__file__).parents[4]
sys.path.insert(0, str(project_root))

from src.config.settings import settings
from src.config.database import Base

# Import all models to ensure they're registered with Base.metadata
from src.infrastructure.database.models import *  # noqa

# Alembic Config object
config = context.config

# Set database URL from settings
config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)

# Interpret the config file for Python logging
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Target metadata for autogenerate
target_metadata = Base.metadata


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"},
        compare_type=True,
    )

    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,
            compare_type=True,
        )

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


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

