from sqlite3 import IntegrityError

from sqlalchemy.orm import Session
from typing import List, Optional

from app.models.models import InfoSource
from app.schemas.source_schema import InfoSourceCreate, InfoSourceUpdate


def get(db: Session, source_id: int) -> Optional[InfoSource]:
    """通过 ID 获取单条信息源"""
    return db.query(InfoSource).filter(InfoSource.id == source_id).first()


def get_multi(db: Session, skip: int = 0, limit: int = 100) -> List[InfoSource]:
    """获取所有信息源列表（支持分页）"""
    return db.query(InfoSource).offset(skip).limit(limit).all()


def create(db: Session, obj_in: InfoSourceCreate) -> InfoSource:
    """创建新的信息源"""
    db_obj = InfoSource(**obj_in.model_dump())
    exits =db.query(InfoSource).filter(InfoSource.source_name == db_obj.source_name).first()
    if exits:
        db.close()
        return db_obj
    try:
        db.add(db_obj)
        db.commit()
        db.refresh(db_obj)
        return db_obj
    except IntegrityError:
        db.rollback()
    finally:
        db.close()
        return db_obj


def update(db: Session, db_obj: InfoSource, obj_in: InfoSourceUpdate) -> InfoSource:
    """更新信息源，仅更新前端传入的字段（exclude_unset=True）"""
    update_data = obj_in.model_dump(exclude_unset=True)

    # 遍历更新模型对象的属性
    for field, value in update_data.items():
        setattr(db_obj, field, value)

    db.add(db_obj)
    db.commit()
    db.refresh(db_obj)
    return db_obj