"""项目-信号关联"""
from .base import Base
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy import BigInteger, Integer, VARCHAR, Float, ForeignKey


class ProjectSignalLink(Base):
    __tablename__ = "project_signal_links"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    project_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey("projects.id"), nullable=False
    )
    signal_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey("signals.id"), nullable=False
    )
    link_type: Mapped[str] = mapped_column(VARCHAR(50), nullable=False, default="related")
    relevance_score: Mapped[float] = mapped_column(Float, nullable=False, default=1.0)

    project = relationship("Project", back_populates="signal_links")
    signal = relationship("Signal")