from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session

from app.database import get_db
from app.models.user_settings import UserSettings
from app.schemas.user_settings import UserSettingsUpdate, UserSettingsResponse
from app.utils.datetime import utcnow
from app.utils.logger import logger

router = APIRouter(prefix="/api/user-settings", tags=["用户设置"])


@router.get("", response_model=UserSettingsResponse)
def get_user_settings(db: Session = Depends(get_db)):
    """获取用户设置（单例模式）"""
    try:
        settings = db.query(UserSettings).filter(UserSettings.id == 1).first()
        if not settings:
            # 首次访问时自动创建默认设置
            settings = UserSettings(id=1)
            db.add(settings)
            db.commit()
            db.refresh(settings)
            logger.info("自动创建默认用户设置")
        return settings
    except Exception as e:
        logger.error(f"获取用户设置失败: {str(e)}")
        raise HTTPException(status_code=500, detail="获取用户设置失败")


@router.put("", response_model=UserSettingsResponse)
def update_user_settings(
    data: UserSettingsUpdate,
    db: Session = Depends(get_db)
):
    """更新用户设置（upsert 单条记录）"""
    try:
        settings = db.query(UserSettings).filter(UserSettings.id == 1).first()
        if not settings:
            settings = UserSettings(id=1)
            db.add(settings)

        update_data = data.model_dump(exclude_unset=True)
        for field, value in update_data.items():
            setattr(settings, field, value)

        settings.updated_at = utcnow()
        db.commit()
        db.refresh(settings)

        logger.info("更新用户设置成功")
        return settings

    except Exception as e:
        db.rollback()
        logger.error(f"更新用户设置失败: {str(e)}")
        raise HTTPException(status_code=500, detail="更新用户设置失败")