import uuid
from enum import Enum
from sqlalchemy import String, Boolean, ForeignKey, Enum as SQLEnum, Text
from sqlalchemy.orm import Mapped, mapped_column
from db.base import Base

class NotificationType(str, Enum):
    PUBLIC = "public"
    JOIN_REQUEST = "join_request"

class Notification(Base):
    __tablename__ = "notifications" # type: ignore

    title: Mapped[str] = mapped_column(String(200), nullable=False)
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    
    type: Mapped[NotificationType] = mapped_column(
        SQLEnum(NotificationType, name="notification_type"),
        nullable=False
    )
    
    is_accepted: Mapped[bool | None] = mapped_column(
        Boolean, 
        nullable=True, 
        default=None
    )

    receiver_id: Mapped[uuid.UUID] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"),
        index=True,
        nullable=False
    )

    sender_id: Mapped[uuid.UUID | None] = mapped_column(
        ForeignKey("users.id", ondelete="SET NULL"),
        nullable=True
    )
    
    group_id: Mapped[uuid.UUID | None] = mapped_column(
        ForeignKey("groups.id", ondelete="CASCADE"),
        nullable=True
    )