from sqlalchemy import Column, Integer, String, Text, DateTime, Float, ForeignKey, func
from database import Base

class GenerationLog(Base):
    __tablename__ = "generation_logs"
    id = Column(Integer, primary_key=True, autoincrement=True)
    document_id = Column(Integer, ForeignKey("documents.id"), nullable=False)
    paragraph_id = Column(Integer, ForeignKey("paragraphs.id"), nullable=False)
    model_id = Column(Integer, ForeignKey("ai_models.id"), nullable=True)
    status = Column(String(20), default="pending", comment="pending/generating/success/failed")
    content = Column(Text, default="", comment="生成的内容")
    duration = Column(Float, default=0, comment="耗时秒数")
    error_msg = Column(Text, default="", comment="错误信息")
    created_at = Column(DateTime, server_default=func.now())