from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Enum
from sqlalchemy.sql import func
from app.core.config import Base
import enum


class ProposalStatus(str, enum.Enum):
    OPEN = "open"
    ACCEPTED = "accepted"
    REJECTED = "rejected"


class Proposal(Base):
    __tablename__ = "proposes"  # keep DB table name for compat

    id = Column(Integer, primary_key=True, index=True)
    propose_code = Column(String(64), nullable=True, unique=True, index=True)  # keep column name for DB compat
    title = Column(String(255), nullable=False)
    description = Column(Text, nullable=True)
    status = Column(Enum(ProposalStatus, values_callable=lambda x: [e.value for e in x]), default=ProposalStatus.OPEN)

    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
    created_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)

    # Populated server-side after accept; links to the generated feature story task
    feat_task_id = Column(String(64), nullable=True)

    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())


# Backward-compatible aliases
ProposeStatus = ProposalStatus
Propose = Proposal