from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Boolean, Text, Enum as SQLEnum
from sqlalchemy.orm import relationship
from datetime import datetime
import enum
from config.database import Base

class NotificationType(enum.Enum):
    EVENT_INVITATION = "event_invitation"
    EVENT_REMINDER = "event_reminder"
    POST_MENTION = "post_mention"
    NEW_ALBUM = "new_album"
    NEW_VLOG = "new_vlog"
    SYSTEM = "system"

class Notification(Base):
    __tablename__ = "notifications"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    type = Column(SQLEnum(NotificationType), nullable=False)
    title = Column(String, nullable=False)
    message = Column(Text, nullable=False)
    link = Column(String)  # Link to the related content
    is_read = Column(Boolean, default=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    read_at = Column(DateTime, nullable=True)
    
    # Relationships
    user = relationship("User", back_populates="notifications")
