"""Fix media table local_path from Windows backslash to Linux forward-slash."""
import asyncio

from sqlalchemy import text


async def main():
    from app.db.base import async_engine, async_session_maker

    # 先看当前状态
    async with async_engine.connect() as conn:
        sample = (await conn.execute(
            text("SELECT local_path FROM media LIMIT 3")
        )).fetchall()
        for r in sample:
            print(f"before: {r[0][:50]}")

    # 批量修复: media\xx\hash.ext → /data/media/xx/hash.ext
    async with async_session_maker() as session:
        result = await session.execute(text(
            "UPDATE media SET local_path = "
            "CONCAT('/data/media/', "
            "  SUBSTRING_INDEX(REPLACE(local_path, CHAR(92), '/'), '/', -2)) "
            "WHERE local_path LIKE 'media%'"
        ))
        print(f"updated: {result.rowcount} rows")
        await session.commit()

    # 验证
    async with async_engine.connect() as conn:
        sample = (await conn.execute(
            text("SELECT local_path FROM media LIMIT 3")
        )).fetchall()
        for r in sample:
            print(f"after: {r[0][:50]}")

    await async_engine.dispose()


if __name__ == "__main__":
    asyncio.run(main())