"""
SQLAlchemy models for the URL Blink application.
"""
from sqlalchemy import Column, Integer, String, Text, DateTime, JSON
from sqlalchemy.sql import func
from database import Base


class BlinkData(Base):
    """
    Model for storing decrypted blink data.
    
    Attributes:
        id: Primary key
        user_id: User identifier (first 20 chars from URL param)
        refer_url: Referer URL from request header
        json_data: Decrypted JSON data
        created_at: Timestamp of record creation
    """
    __tablename__ = "blink_data"

    id = Column(Integer, primary_key=True, autoincrement=True, index=True)
    user_id = Column(String(20), index=True, nullable=False)
    refer_url = Column(Text, nullable=True)
    ip_address = Column(String(45), nullable=True)  # IPv6 can be up to 45 chars
    json_data = Column(JSON, nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    def __repr__(self):
        return f"<BlinkData(id={self.id}, user_id={self.user_id})>"