# api/teacher_api.py
# 教师信息管理模块：接口层只负责 HTTP 出入参，查库/校验/事务交给 dao.teacher_dao

from typing import Optional

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

from dao import teacher_dao
from database import get_db
from schemas.teacher_schema import TeacherCreate, TeacherUpdate, TeacherOut

router = APIRouter()


@router.get("", summary="分页查询教师列表")
def list_teachers(
    page: int = Query(1, ge=1, description="页码"),
    size: int = Query(10, ge=1, le=100, description="每页数量"),
    name: Optional[str] = Query(None, description="按姓名模糊查询"),
    type: Optional[str] = Query(None, description="按职位过滤"),
    db: Session = Depends(get_db),
):
    total, items = teacher_dao.list_teachers(db, page=page, size=size, name=name, type=type)
    return {
        "total": total,
        "page": page,
        "size": size,
        "items": [TeacherOut.model_validate(x) for x in items],
    }


@router.get("/{tea_id}", summary="查询单个教师详情")
def get_teacher(tea_id: str, db: Session = Depends(get_db)):
    """查询教师详情，附带其担任班主任/主讲老师的班级编号。"""
    teacher = teacher_dao.assert_teacher_alive(db, tea_id, "教师不存在或已删除")
    data = TeacherOut.model_validate(teacher).model_dump()
    data["head_classes"] = [c.id for c in teacher.head_classes if not c.is_deleted]
    data["lecturer_classes"] = [c.id for c in teacher.lecturer_classes if not c.is_deleted]
    return data


@router.post("", response_model=TeacherOut, status_code=201, summary="新增教师")
def create_teacher(payload: TeacherCreate, db: Session = Depends(get_db)):
    """新增教师（编号与电话唯一，由 DAO 校验）。"""
    return teacher_dao.create_teacher(db, payload.model_dump())


@router.put("/{tea_id}", response_model=TeacherOut, summary="更新教师信息")
def update_teacher(tea_id: str, payload: TeacherUpdate, db: Session = Depends(get_db)):
    """按传入字段局部更新教师信息，改电话时由 DAO 重新校验唯一。"""
    return teacher_dao.update_teacher(db, tea_id, payload.model_dump(exclude_unset=True))


@router.delete("/{tea_id}", summary="删除教师(软删除)")
def delete_teacher(tea_id: str, db: Session = Depends(get_db)):
    """软删除教师。"""
    teacher_dao.soft_delete_teacher(db, tea_id)
    return {"message": "删除成功", "id": tea_id}