import uuid
from datetime import datetime
from typing import Iterable, Set, Union
from uuid import UUID

from boltons import urlutils
from sqlalchemy import Column
from sqlalchemy.orm import Query, relationship
from sqlalchemy_utils import Ltree

from ereuse_devicehub.resources.device.models import Device
from ereuse_devicehub.resources.models import Thing

LotQuery = Union[Query, Iterable['Lot']]


class Lot(Thing):
    id = ...  # type: Column
    name = ...  # type: Column
    closed = ...  # type: Column
    devices = ...  # type: relationship
    paths = ...  # type: relationship

    def __init__(self, name: str, closed: bool = closed.default.arg) -> None:
        super().__init__()
        self.id = ...  # type: UUID
        self.name = ...  # type: str
        self.closed = ...  # type: bool
        self.devices = ...  # type: Set[Device]
        self.paths = ...  # type: Set[Path]

    def add_child(self, child: Union[Lot, uuid.UUID]):
        pass

    def remove_child(self, child: Union[Lot, uuid.UUID]):
        pass

    @classmethod
    def roots(cls) -> LotQuery:
        pass

    @property
    def children(self) -> LotQuery:
        pass

    @property
    def parents(self) -> LotQuery:
        pass

    @property
    def url(self) -> urlutils.URL:
        pass

class Path:
    id = ...  # type: Column
    lot_id = ...  # type: Column
    lot = ...  # type: relationship
    path = ...  # type: Column
    created = ...  # type: Column

    def __init__(self, lot: Lot) -> None:
        super().__init__()
        self.id = ...  # type: UUID
        self.lot = ...  # type: Lot
        self.path = ...  # type: Ltree
        self.created = ...  # type: datetime