"""Alembic environment — DATABASE_URL from env, metadata from app.models."""
from __future__ import annotations

import os
import sys
from logging.config import fileConfig

from alembic import context
from sqlalchemy import create_engine, pool

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

# Import EVERY model module so Base.metadata is complete. A module missing
# here silently vanishes from autogenerate — keep this list in sync with
# app/models/ (test_models.py asserts the table count).
from app.models.base import Base  # noqa: E402
from app.models import (  # noqa: E402, F401
    assistant,
    catalog,
    garden,
    history,
    identity,
    notes,
    planting,
    reminders,
    search,
    weather,
)

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

target_metadata = Base.metadata


def _database_url() -> str:
    url = os.environ.get("DATABASE_URL", "")
    if not url:
        raise RuntimeError("DATABASE_URL is not set")
    return url


def run_migrations_offline() -> None:
    context.configure(
        url=_database_url(),
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    engine = create_engine(_database_url(), poolclass=pool.NullPool)
    with engine.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()