from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Text
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from ..database import Base


class Notification(Base):
    """User notifications"""
    __tablename__ = "notifications"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)

    # Notification type: vehicle_recommended, shipping_update, withdrawal_processed,
    # referral_reward, dealer_approved, share_purchased, system
    notification_type = Column(String(50), nullable=False)

    # Title and message (supports i18n keys or direct text)
    title = Column(String(200), nullable=False)
    message = Column(Text, nullable=False)

    # Optional link to navigate when clicked
    link = Column(String(500), nullable=True)

    # Related entity (optional)
    related_id = Column(Integer, nullable=True)  # ID of related entity
    related_type = Column(String(50), nullable=True)  # Type: vehicle_request, purchased_vehicle, withdrawal, etc.

    # Status
    is_read = Column(Boolean, default=False)
    read_at = Column(DateTime(timezone=True), nullable=True)

    # Timestamps
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    # Relationships
    user = relationship("User", backref="notifications")