from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey
from sqlalchemy.dialects.postgresql import ENUM
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
import enum

from app.database import Base


class WorldVisibility(enum.Enum):
    PUBLIC = "public"
    PRIVATE = "private"
    FRIENDS_ONLY = "friends_only"


class World(Base):
    __tablename__ = "worlds"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String(255), nullable=False)
    description = Column(Text, nullable=True)
    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    visibility = Column(
        ENUM(
            WorldVisibility,
            name="world_visibility",
            create_type=False,
            values_callable=lambda enum_cls: [e.value for e in enum_cls],
        ),
        default=WorldVisibility.PUBLIC,
    )
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    owner = relationship("User", back_populates="worlds")
    assets = relationship("Asset", back_populates="world", cascade="all, delete-orphan")
    # world_content.py / world_persistence_impl.md §4.1. Added here (only)
    # so PC1/PC2 code depending on this module is otherwise untouched.
    rooms = relationship("WorldRoom", back_populates="world", cascade="all, delete-orphan")