"""FCM / 设备推送 Token 模型"""
from sqlalchemy import Column, String, DateTime, func
from sqlalchemy.dialects.mysql import CHAR
from app.core.database import Base
import uuid


class FcmToken(Base):
    """设备推送 Token（Firebase Cloud Messaging / APNs）"""

    __tablename__ = "fcm_tokens"

    id = Column(CHAR(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id = Column(CHAR(36), nullable=False, index=True, comment="关联用户ID")
    token = Column(String(512), nullable=False, unique=True, comment="FCM/APNs 设备令牌")
    platform = Column(String(16), nullable=False, default="android", comment="android / ios / web")
    created_at = Column(DateTime, server_default=func.now(), comment="注册时间")
    last_used_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), comment="最后推送时间")