import uuid
from sqlalchemy import Column, String, Text, DateTime, ForeignKey
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.core.database import Base


class Blocker(Base):
    __tablename__ = "pjctrl_blockers"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    task_id = Column(String(36), ForeignKey("pjctrl_tasks.id", ondelete="CASCADE"), nullable=False)
    reported_by = Column(String(36), ForeignKey("pjctrl_users.id"), nullable=False)
    reason = Column(Text, nullable=False)
    resolved_by = Column(String(36), ForeignKey("pjctrl_users.id"), nullable=True)
    resolution_note = Column(Text, nullable=True)
    created_at = Column(DateTime, server_default=func.now(), nullable=False)
    resolved_at = Column(DateTime, nullable=True)

    # Relationships
    task = relationship("Task", back_populates="blockers")
    reporter = relationship("User", foreign_keys=[reported_by], back_populates="reported_blockers")
    resolver = relationship("User", foreign_keys=[resolved_by], back_populates="resolved_blockers")