#!/usr/bin/env python3
"""清空本应用写入的 PostgreSQL 业务表（开发用；表结构保留）。

直接执行即可：``uv run python scripts/start_fresh.py``

``./start_fresh.sh`` 与 ``./start.sh`` 一致，仅在启动 uvicorn 前多执行本脚本。
"""

from __future__ import annotations

import asyncio
import os
import sys

# 允许从任意 cwd 以 `uv run python scripts/start_fresh.py` 运行
_REPO_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
if _REPO_ROOT not in sys.path:
    sys.path.insert(0, _REPO_ROOT)

from sqlalchemy import text

from app.config import settings
from app.database import engine, init_db_schema


# 与 app/db/models.py 一致；有 FK 时子表排前面
_TABLES = (
    "surgery_result_details",
    "surgery_final_results",
    "voice_confirmation_audits",
)

_TRUNCATE_SQL = text(
    "TRUNCATE TABLE "
    + ", ".join(_TABLES)
    + " RESTART IDENTITY"
)


async def _run() -> None:
    # 确保新库也有表
    await init_db_schema()
    async with engine.begin() as conn:
        await conn.execute(_TRUNCATE_SQL)
    dsn = settings.sqlalchemy_database_url
    safe = dsn
    if "@" in dsn:
        # 隐藏 user:pass
        at = dsn.rfind("@")
        if "://" in dsn:
            parts = dsn.split("://", 1)
            safe = f"{parts[0]}://***@{dsn[at + 1:]}"
    print("已清空表:", ", ".join(_TABLES))
    print("数据库:", safe)


def main() -> None:
    asyncio.run(_run())
    print("完成。")


if __name__ == "__main__":
    main()