from typing import List

from sqlalchemy.orm import Session

from Model.DepartmentModel import Department
from Model.UserModel import User
from Schemas import DepartmentSchemas


def get_department_list(db: Session, query_params: DepartmentSchemas.DepartmentListQueryParams):
    query = db.query(Department)
    count = query.count()
    if query_params.page is not None and query_params.page_size is not None:
        query = query.offset((query_params.page - 1) * query_params.page_size).limit(query_params.page).all()
    return count, query


def is_department_created(db: Session, name: str = None, department_id=None):
    if name is not None:
        if db.query(Department).filter_by(name=name).first():
            return True
        else:
            return False
    if department_id is not None:
        if db.query(Department).filter_by(id=department_id).first():
            return True
        else:
            return False


def add_department(db: Session, name: str, belong: int):
    if not is_department_created(db, name):
        db.add(Department(name=name, belong=belong))
        db.commit()
    else:
        raise Exception("部门已经存在")


def change_department(db: Session, department_id: int, name: str, belong: int):
    db.query(Department).filter_by(id=department_id).update({"name": name, "belong": belong})
    db.commit()


def delete_department(db: Session, item_id: str):
    db.query(Department).filter_by(id=item_id).delete()
    db.commit()


def set_user_department(db: Session, user_id: str, department_id_list: List[int]):
    department_info = "".join([str(item) for item in department_id_list])
    db.query(User).filter_by(id=user_id).update({"department": department_info})
    db.commit()
    db.refresh(User)
    return User.department


def get_department_tree(db: Session) -> dict:
    item_list = db.query(Department).all()
    node_list = []
    for item in item_list:
        item_dic = item.to_dict()
        item_dic['children'] = []
        node_list.append(item_dic)

    nodes_dic = {node["id"]: node for node in node_list}
    tree = []
    for node in node_list:
        belong = node['belong']
        if belong:
            if belong in nodes_dic:
                nodes_dic[belong]['children'].append(node)
            else:
                print(f"不存在{belong}")
        else:
            tree.append(node)
    return tree