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

# Add src to path so we can import our models
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'src'))

from database.models import Base

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
target_metadata = Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.

def get_database_url():
    """Get database URL from environment or config"""
    from dotenv import load_dotenv
    load_dotenv()
    
    return os.getenv("DATABASE_URL", "sqlite+aiosqlite:///fishbowl_test.db")

def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode."""
    url = get_database_url()
    # Convert aiosqlite URL to sqlite for offline mode
    if url.startswith("sqlite+aiosqlite"):
        url = url.replace("sqlite+aiosqlite", "sqlite")
    
    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."""
    url = get_database_url()
    # Convert aiosqlite URL to sqlite for migrations
    if url.startswith("sqlite+aiosqlite"):
        url = url.replace("sqlite+aiosqlite", "sqlite")
    
    configuration = config.get_section(config.config_ini_section)
    configuration["sqlalchemy.url"] = 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()