from datetime import datetime
from typing import Optional, TYPE_CHECKING

from sqlalchemy import ForeignKey
from sqlalchemy.orm import relationship, backref, Mapped, mapped_column

from models.base import BaseModel
from .marketplace import BaseMarketplace
from .shipping import Pallet, Box
from .shipping_warehouse import ShippingWarehouse

if TYPE_CHECKING:
    from . import CardBillRequest, User, BaseModel, Board, CardStatus, CardGroup, CardAttribute, CardService as CardServiceModel, \
    CardProduct, Client


class Card(BaseModel):
    __tablename__ = 'cards'

    # region Base card attributes
    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(nullable=False, comment='Название карточки')
    comment: Mapped[str] = mapped_column(nullable=False, server_default='', comment='Комментарий')
    created_at: Mapped[datetime] = mapped_column(nullable=False, comment='Дата создания')

    is_deleted: Mapped[bool] = mapped_column(nullable=False, server_default='0', default=False, comment='Удалена')
    is_completed: Mapped[bool] = mapped_column(nullable=False, server_default='0', default=False, comment='Завершена')

    lexorank: Mapped[str] = mapped_column(nullable=False, comment='Lexorank', index=True)

    board_id: Mapped[int] = mapped_column(ForeignKey('boards.id'), nullable=True, server_default='1')
    board: Mapped['Board'] = relationship(
        'Board',
        back_populates='cards',
    )

    current_status_id: Mapped[int] = mapped_column(
        ForeignKey('card_statuses.id'),
        nullable=False,
        comment='Текущий статус',
    )
    status: Mapped['CardStatus'] = relationship(lazy='selectin')

    status_history = relationship('CardStatusHistory', back_populates='card', cascade="all, delete-orphan")

    attributes: Mapped[list['CardAttribute']] = relationship(
        'CardAttribute',
        uselist=True,
        back_populates='card',
        lazy='selectin',
    )

    group: Mapped[Optional["CardGroup"]] = relationship(
        'CardGroup',
        secondary='card_relations',
        lazy='joined',
        back_populates='cards'
    )
    # endregion

    # region Attributes handled by modules

    # module servicesAndProducts
    is_locked: Mapped[bool] = mapped_column(default=False, server_default='0')

    shipping_warehouse_id: Mapped[int] = mapped_column(ForeignKey('shipping_warehouses.id'), nullable=True)
    shipping_warehouse: Mapped["ShippingWarehouse"] = relationship()

    base_marketplace_key: Mapped[str] = mapped_column(ForeignKey("base_marketplaces.key"), nullable=True)
    base_marketplace: Mapped["BaseMarketplace"] = relationship(lazy="joined")

    services: Mapped[list['CardServiceModel']] = relationship(
        'CardService',
        back_populates='card',
        cascade="all, delete-orphan",
        order_by="desc(CardService.service_id)"
    )

    products: Mapped[list['CardProduct']] = relationship(
        'CardProduct',
        back_populates='card',
        cascade="all, delete-orphan",
        order_by="desc(CardProduct.product_id)"
    )

    bill_request: Mapped[Optional['CardBillRequest']] = relationship(back_populates='card', lazy='joined')

    # module client
    client_id: Mapped[int] = mapped_column(
        ForeignKey('clients.id', ondelete='CASCADE'),
        nullable=False,
        comment='ID клиента',
    )
    client: Mapped['Client'] = relationship('Client', backref=backref('cards', cascade="all, delete-orphan"))

    # module managers
    manager_id: Mapped[int] = mapped_column(ForeignKey('users.id'), nullable=True)
    manager: Mapped[Optional["User"]] = relationship(back_populates='managed_cards', lazy='joined')

    # module shipment
    pallets: Mapped[list[Pallet]] = relationship(back_populates='card', lazy='selectin')
    boxes: Mapped[list[Box]] = relationship(back_populates='card', lazy='selectin')

    # module employees
    employees: Mapped[list['CardEmployees']] = relationship(back_populates='card', lazy='selectin')

    # endregion

class CardEmployees(BaseModel):
    __tablename__ = 'card_employees'
    user_id: Mapped[int] = mapped_column(ForeignKey('users.id'), primary_key=True)
    user: Mapped['User'] = relationship('User', back_populates='cards', lazy='selectin')

    card_id: Mapped[int] = mapped_column(ForeignKey('cards.id'), primary_key=True)
    card: Mapped[Card] = relationship('Card', back_populates='employees', lazy='selectin')

    created_at: Mapped[datetime] = mapped_column()