import uuid as _uuid
from sqlalchemy import Column, Integer, String, Text, Date, Boolean, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from app.database import Base
from app.utils.datetime import utcnow


class CertificateCategory(Base):
    """证书分类模型"""
    __tablename__ = "certificate_categories"

    id = Column(Integer, primary_key=True, index=True)
    uuid = Column(String(36), default=lambda: str(_uuid.uuid4()), unique=True, index=True)
    name = Column(String(50), nullable=False)
    icon = Column(String(50), default="medal")
    color = Column(String(20), default="#FFB7C5")
    sort_order = Column(Integer, default=0)
    is_deleted = Column(Boolean, default=False)
    sync_version = Column(Integer, default=1)

    certificates = relationship("Certificate", back_populates="category")


class Certificate(Base):
    """证书模型"""
    __tablename__ = "certificates"

    id = Column(Integer, primary_key=True, index=True)
    uuid = Column(String(36), default=lambda: str(_uuid.uuid4()), unique=True, index=True)
    title = Column(String(200), nullable=False)
    category_id = Column(Integer, ForeignKey("certificate_categories.id"), nullable=True)
    image = Column(Text, nullable=True)  # base64 data URL
    issuer = Column(String(200), nullable=True)  # 来源/颁发机构
    issue_date = Column(Date, nullable=True)
    expiry_date = Column(Date, nullable=True)  # null = 永久有效
    description = Column(Text, nullable=True)
    sort_order = Column(Integer, default=0)
    is_deleted = Column(Boolean, default=False)
    sync_version = Column(Integer, default=1)
    created_at = Column(DateTime, default=utcnow)
    updated_at = Column(DateTime, default=utcnow, onupdate=utcnow)

    category = relationship("CertificateCategory", back_populates="certificates")