from sqlalchemy import Column, String, Boolean, DateTime, ForeignKey
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.sql import func
import uuid
from app.database import Base


class Share(Base):
    """Share model for managing map access via share links."""

    __tablename__ = "shares"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    map_id = Column(UUID(as_uuid=True), ForeignKey("maps.id", ondelete="CASCADE"), nullable=False, index=True)
    share_token = Column(String(64), unique=True, nullable=False, index=True)

    # Access levels: 'read_only', 'edit', 'guest_read_only'
    access_level = Column(String(20), nullable=False)

    # Whether authentication is required to use this share link
    requires_auth = Column(Boolean, default=True, nullable=False)

    # Optional expiration date
    expires_at = Column(DateTime(timezone=True), nullable=True)

    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    created_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)