"""Alembic migration environment."""

from __future__ import annotations

import asyncio

# F19 (Astra P1): deterministic full-model discovery for Alembic.
# `from app.models import *` only loads CORE models (48 tables in a fresh
# process). Contact and ~80 other tables physically live in plugins
# (e.g. app.plugins.builtins.contacts.models) — the lazy package
# __getattr__ never fires for wildcard imports. Without the plugin models
# the metadata sort fails (contact_merge_history → contacts FK) and
# `alembic check` compares against an incomplete schema.
import importlib
from logging.config import fileConfig

from sqlalchemy import pool
from sqlalchemy.engine import Connection
from sqlalchemy.ext.asyncio import async_engine_from_config

from alembic import context
from app.config import get_settings
from app.core.db import Base
from app.models import *  # noqa: F401,F403
from app.plugins.registry import get_registry

_registry = get_registry()
_registry.discover_builtins()
for _plugin_name in _registry.list_discovered():
    try:
        importlib.import_module(f"app.plugins.builtins.{_plugin_name}.models")
    except ImportError:
        pass  # plugin has no models module

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

target_metadata = Base.metadata
settings = get_settings()
# ⚠️ RLS Migration History: 21 Migrationen mit 8 Disable-Zyklen. Dies ist historisch bedingt
# und zeigt trial-and-error. Aktuelle RLS-Konfiguration ist stabil (113 Tabellen).
# Bei neuen RLS-Änderungen nur noch Migration-Runner nutzen.
# Use migration_database_url (crm_migration role, table owner) for Alembic
config.set_main_option("sqlalchemy.url", settings.migration_database_url or settings.database_url)


def run_migrations_offline() -> None:
    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 do_run_migrations(connection: Connection) -> None:
    context.configure(connection=connection, target_metadata=target_metadata)
    with context.begin_transaction():
        context.run_migrations()


async def run_async_migrations() -> None:
    connectable = async_engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )
    async with connectable.connect() as connection:
        await connection.run_sync(do_run_migrations)
    await connectable.dispose()


def run_migrations_online() -> None:
    asyncio.run(run_async_migrations())


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