from __future__ import annotations
from datetime import datetime
from typing import Optional, List, TYPE_CHECKING
from uuid import uuid4
from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql import func
from src.apps.base.models.base import Base

if TYPE_CHECKING:
    from src.apps.feature_control.models.feature_plan_item import FeaturePlanItem
    from src.apps.feature_control.models.merchant_feature_plan import MerchantFeaturePlan


class FeaturePlan(Base):
    __tablename__ = "feature_plans"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    uuid: Mapped[str] = mapped_column(
        UUID(as_uuid=False), nullable=False, unique=True, index=True, default=lambda: str(uuid4())
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True, index=True)
    created_by: Mapped[Optional[int]] = mapped_column(Integer, ForeignKey("users.id"), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    updated_at: Mapped[Optional[datetime]] = mapped_column(
        DateTime(timezone=True), nullable=True, onupdate=func.now()
    )
    deleted_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True)

    items: Mapped[List["FeaturePlanItem"]] = relationship(
        "FeaturePlanItem",
        back_populates="plan",
        cascade="all, delete-orphan",
    )
    merchant_assignments: Mapped[List["MerchantFeaturePlan"]] = relationship(
        "MerchantFeaturePlan",
        back_populates="plan",
    )