"""sys_config 仓储：运营参数读写（示例+可复用模板）。"""
from __future__ import annotations

from sqlalchemy import select

from model.sys_config import SysConfig
from repositories.base import BaseRepository


class SysConfigRepo(BaseRepository):
    model = SysConfig

    async def get_value(self, key: str, default: str | None = None) -> str | None:
        row = await self.db.scalar(select(SysConfig).where(SysConfig.config_key == key))
        return row.config_value if row else default

    async def set_value(self, key: str, value: str, description: str | None = None) -> SysConfig:
        row = await self.db.scalar(select(SysConfig).where(SysConfig.config_key == key))
        if row is None:
            row = SysConfig(config_key=key, config_value=value, description=description)
            self.db.add(row)
        else:
            row.config_value = value
            if description:
                row.description = description
        await self.db.commit()
        await self.db.refresh(row)
        return row