from typing import TYPE_CHECKING, Optional

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

from models.base import BaseModel
from models.mixins import SoftDeleteMixin, CreatedAtMixin, IdMixin

if TYPE_CHECKING:
    from models import Status, Board, DealStatusHistory, DealGroup, DealTag
    from modules.clients.models import Client


class Deal(BaseModel, IdMixin, SoftDeleteMixin, CreatedAtMixin):
    __tablename__ = "deals"

    name: Mapped[str] = mapped_column()
    lexorank: Mapped[str] = mapped_column()

    status_id: Mapped[int] = mapped_column(
        ForeignKey("statuses.id"),
        comment="Текущий статус",
    )
    status: Mapped["Status"] = relationship()

    board_id: Mapped[Optional[int]] = mapped_column(
        ForeignKey("boards.id"), server_default="1"
    )
    board: Mapped[Optional["Board"]] = relationship(back_populates="deals")

    status_history: Mapped[list["DealStatusHistory"]] = relationship(
        back_populates="deal",
        cascade="all, delete-orphan",
        lazy="noload",
    )

    group_id: Mapped[Optional[int]] = mapped_column(
        ForeignKey("deal_groups.id"), default=None, server_default=None
    )
    group: Mapped[Optional["DealGroup"]] = relationship(
        lazy="noload", back_populates="deals"
    )

    tags: Mapped[list["DealTag"]] = relationship(
        secondary="deals_deal_tags",
        back_populates="deals",
        lazy="selectin",
        primaryjoin="Deal.id == deals_deal_tags.c.deal_id",
        secondaryjoin="and_(DealTag.id == deals_deal_tags.c.deal_tag_id, DealTag.is_deleted == False)",
    )

    # module client
    client_id: Mapped[Optional[int]] = mapped_column(
        ForeignKey("clients.id", ondelete="CASCADE"),
    )
    client: Mapped["Client"] = relationship(
        backref=backref("deals", cascade="all, delete-orphan"), lazy="immediate"
    )