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

# Add parent directory to path
sys.path.insert(0, str(Path(__file__).resolve().parents[1]))

# Import models and Base
from src.config.database import Base
from src.models import *  # Import all models

# this is the Alembic Config object
config = context.config

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

# Get database URL from environment
database_url = os.getenv("DATABASE_URL")
if not database_url:
    db_user = os.getenv("DB_USER", "root")
    db_pass = os.getenv("DB_PASS", "")
    db_name = os.getenv("DB_NAME", "hotel_db")
    db_host = os.getenv("DB_HOST", "localhost")
    db_port = os.getenv("DB_PORT", "3306")
    database_url = f"mysql+pymysql://{db_user}:{db_pass}@{db_host}:{db_port}/{db_name}"

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

# add your model's MetaData object here
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."""
    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()