# -*- coding: utf-8 -*-
"""Alembic 迁移环境（async engine，target_metadata=Base.metadata）。

数据库 URL 取服务端配置 config.DATABASE_URL（同应用唯一总库），
迁移/建表均通过 alembic 运行，不在应用启动时执行。
"""
from __future__ import annotations

import asyncio
import os
import sys
from logging.config import fileConfig

from alembic import context
from sqlalchemy import pool
from sqlalchemy.ext.asyncio import async_engine_from_config

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

from app import config as app_config
from app.infrastructure.db import Base
import app.infrastructure.models  # noqa: F401 确保模型注册到 Base.metadata

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

# 用应用统一 DATABASE_URL（可被 env PINEAGENTS_DEMO_DATABASE_URL 覆盖）
config.set_main_option("sqlalchemy.url", app_config.DATABASE_URL)
target_metadata = Base.metadata


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


def do_run_migrations(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()