import sys
import os
from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from alembic import context
from dotenv import load_dotenv

# Load environment
load_dotenv()

# Add app folder to path
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'app'))

# Alembic config
config = context.config

# Read DB URL from .env
config.set_main_option("sqlalchemy.url", os.getenv("DATABASE_URL"))

# For logging
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Import SQLAlchemy Base from your project
from app.core.database import Base
from app.models import Client, Visitor, Message

target_metadata = Base.metadata

def run_migrations_offline():
    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():
    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()