from sqlalchemy import select, update, delete, and_, func
from sqlalchemy.ext.asyncio import AsyncSession
from module_admin.entity.do.menu_do import SysMenu
from module_admin.entity.do.user_do import SysUser, SysUserRole
from module_admin.entity.do.role_do import SysRole, SysRoleMenu
from module_admin.entity.vo.menu_vo import *


class MenuDao:
    """
    菜单管理模块数据库操作层
    """

    @classmethod
    async def get_menu_detail_by_id(cls, db: AsyncSession, menu_id: int):
        """
        根据菜单id获取菜单详细信息
        :param db: orm对象
        :param menu_id: 菜单id
        :return: 菜单信息对象
        """
        menu_info = (await db.execute(
            select(SysMenu)
                .where(SysMenu.menu_id == menu_id)
        )).scalars().first()

        return menu_info

    @classmethod
    async def get_menu_detail_by_info(cls, db: AsyncSession, menu: MenuModel):
        """
        根据菜单参数获取菜单信息
        :param db: orm对象
        :param menu: 菜单参数对象
        :return: 菜单信息对象
        """
        menu_info = (await db.execute(
            select(SysMenu)
                .where(SysMenu.parent_id == menu.parent_id if menu.parent_id else True,
                       SysMenu.menu_name == menu.menu_name if menu.menu_name else True,
                       SysMenu.menu_type == menu.menu_type if menu.menu_type else True)
        )).scalars().first()

        return menu_info

    @classmethod
    async def get_menu_list_for_tree(cls, db: AsyncSession, user_id: int, role: list):
        """
        根据角色信息获取所有在用菜单列表信息
        :param db: orm对象
        :param user_id: 用户id
        :param role: 用户角色列表信息
        :return: 菜单列表信息
        """
        role_id_list = [item.role_id for item in role]
        if 1 in role_id_list:
            menu_query_all = (await db.execute(
                select(SysMenu)
                    .where(SysMenu.status == '0')
                    .order_by(SysMenu.order_num)
                    .distinct()
            )).scalars().all()
        else:
            menu_query_all = (await db.execute(
                select(SysMenu)
                    .select_from(SysUser)
                    .where(SysUser.status == '0', SysUser.del_flag == '0', SysUser.user_id == user_id)
                    .join(SysUserRole, SysUser.user_id == SysUserRole.user_id, isouter=True)
                    .join(SysRole,
                          and_(SysUserRole.role_id == SysRole.role_id, SysRole.status == '0', SysRole.del_flag == '0'),
                          isouter=True)
                    .join(SysRoleMenu, SysRole.role_id == SysRoleMenu.role_id, isouter=True)
                    .join(SysMenu, and_(SysRoleMenu.menu_id == SysMenu.menu_id, SysMenu.status == '0'))
                    .order_by(SysMenu.order_num)
                    .distinct()
            )).scalars().all()

        return menu_query_all

    @classmethod
    async def get_menu_list(cls, db: AsyncSession, page_object: MenuQueryModel, user_id: int, role: list):
        """
        根据查询参数获取菜单列表信息
        :param db: orm对象
        :param page_object: 不分页查询参数对象
        :param user_id: 用户id
        :param role: 用户角色列表
        :return: 菜单列表信息对象
        """
        role_id_list = [item.role_id for item in role]
        if 1 in role_id_list:
            menu_query_all = (await db.execute(
                select(SysMenu)
                    .where(SysMenu.status == page_object.status if page_object.status else True,
                           SysMenu.menu_name.like(
                               f'%{page_object.menu_name}%') if page_object.menu_name else True)
                    .order_by(SysMenu.order_num)
                    .distinct()
            )).scalars().all()
        else:
            menu_query_all = (await db.execute(
                select(SysMenu)
                    .select_from(SysUser)
                    .where(SysUser.status == '0', SysUser.del_flag == '0', SysUser.user_id == user_id)
                    .join(SysUserRole, SysUser.user_id == SysUserRole.user_id, isouter=True)
                    .join(SysRole,
                          and_(SysUserRole.role_id == SysRole.role_id, SysRole.status == '0', SysRole.del_flag == '0'),
                          isouter=True)
                    .join(SysRoleMenu, SysRole.role_id == SysRoleMenu.role_id, isouter=True)
                    .join(SysMenu, and_(SysRoleMenu.menu_id == SysMenu.menu_id,
                                        SysMenu.status == page_object.status if page_object.status else True,
                                        SysMenu.menu_name.like(
                                            f'%{page_object.menu_name}%') if page_object.menu_name else True))
                    .order_by(SysMenu.order_num)
                    .distinct()
            )).scalars().all()

        return menu_query_all

    @classmethod
    async def add_menu_dao(cls, db: AsyncSession, menu: MenuModel):
        """
        新增菜单数据库操作
        :param db: orm对象
        :param menu: 菜单对象
        :return:
        """
        db_menu = SysMenu(**menu.model_dump())
        db.add(db_menu)
        await db.flush()

        return db_menu

    @classmethod
    async def edit_menu_dao(cls, db: AsyncSession, menu: dict):
        """
        编辑菜单数据库操作
        :param db: orm对象
        :param menu: 需要更新的菜单字典
        :return:
        """
        await db.execute(
            update(SysMenu),
            [menu]
        )

    @classmethod
    async def delete_menu_dao(cls, db: AsyncSession, menu: MenuModel):
        """
        删除菜单数据库操作
        :param db: orm对象
        :param menu: 菜单对象
        :return:
        """
        await db.execute(
            delete(SysMenu)
                .where(SysMenu.menu_id.in_([menu.menu_id]))
        )

    @classmethod
    async def has_child_by_menu_id_dao(cls, db: AsyncSession, menu_id: int):
        """
        根据菜单id查询菜单关联子菜单的数量
        :param db: orm对象
        :param menu_id: 菜单id
        :return: 菜单关联子菜单的数量
        """
        menu_count = (await db.execute(
            select(func.count('*'))
                .select_from(SysMenu)
                .where(SysMenu.menu_id == menu_id)
        )).scalar()

        return menu_count

    @classmethod
    async def check_menu_exist_role_dao(cls, db: AsyncSession, menu_id: int):
        """
        根据菜单id查询菜单关联角色数量
        :param db: orm对象
        :param menu_id: 菜单id
        :return: 菜单关联角色数量
        """
        role_count = (await db.execute(
            select(func.count('*'))
                .select_from(SysRoleMenu)
                .where(SysRoleMenu.menu_id == menu_id)
        )).scalar()

        return role_count