# dao/advisor_dao.py
# 顾问信息数据访问层

from typing import List, Optional, Tuple

from sqlalchemy.orm import Session

from dao.exceptions import ConflictError, NotFoundError
from dao.pagination import paginate
from model.advisor_model import AdvisorInfo


def assert_advisor_alive(db: Session, adv_id: str, detail: Optional[str] = None) -> AdvisorInfo:
    """
    确认顾问存在且未删除，否则抛 NotFoundError。
    供学生模块复用作外键校验。
    """
    advisor = db.query(AdvisorInfo).filter(AdvisorInfo.id == adv_id, AdvisorInfo.is_deleted == 0).first()
    if not advisor:
        raise NotFoundError(detail or f"顾问 {adv_id} 不存在")
    return advisor


def list_advisors(
    db: Session,
    page: int,
    size: int,
    name: Optional[str] = None,
) -> Tuple[int, List[AdvisorInfo]]:
    """分页查询顾问，支持按姓名模糊查询。"""
    query = db.query(AdvisorInfo).filter(AdvisorInfo.is_deleted == 0)
    if name:
        query = query.filter(AdvisorInfo.name.like(f"%{name}%"))
    return paginate(query, page, size, order_by=AdvisorInfo.id)


def create_advisor(db: Session, data: dict) -> AdvisorInfo:
    """新增顾问：校验编号唯一（主键，含已删除记录）。"""
    if db.query(AdvisorInfo).filter(AdvisorInfo.id == data["id"]).first():
        raise ConflictError("顾问编号已存在")

    advisor = AdvisorInfo(**data)
    db.add(advisor)
    db.commit()
    db.refresh(advisor)
    return advisor


def update_advisor(db: Session, adv_id: str, data: dict) -> AdvisorInfo:
    """更新顾问信息。"""
    advisor = assert_advisor_alive(db, adv_id, "顾问不存在或已删除")

    for field, value in data.items():
        setattr(advisor, field, value)

    db.commit()
    db.refresh(advisor)
    return advisor


def soft_delete_advisor(db: Session, adv_id: str) -> None:
    """软删除顾问。"""
    advisor = assert_advisor_alive(db, adv_id, "顾问不存在或已删除")
    advisor.is_deleted = 1
    db.commit()