from __future__ import annotations

from sqlalchemy import Column, String, Integer, Float, JSON, DateTime
from datetime import datetime

from .base import AlchemyBase


class DHTRecordRow(AlchemyBase):
    __tablename__ = 'dht_records'

    # fingerprint = blake3(serialized key)
    fingerprint = Column(String(128), primary_key=True)
    key = Column(String(512), nullable=False, index=True)
    schema_version = Column(String(16), nullable=False, default='v1')
    logical_counter = Column(Integer, nullable=False, default=0)
    timestamp = Column(Float, nullable=False, default=0.0)
    node_id = Column(String(128), nullable=False)
    signature = Column(String(512), nullable=True)
    value = Column(JSON, nullable=False, default=dict)
    updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)