app/models/bookings.py

from sqlalchemy import Column, String, Integer, ForeignKey
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship
from backend.app.models.base import BaseDBModel

class Booking(BaseDBModel):
    __tablename__ = "bookings"
    
    code = Column(String, unique=True, index=True, nullable=False) # e.g. B-2401
    job_id = Column(UUID(as_uuid=True), ForeignKey("jobs.id", ondelete="SET NULL"), nullable=True)
    customer_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), index=True, nullable=False)
    worker_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), index=True, nullable=False)
    amount = Column(Integer, nullable=False)
    status = Column(String, nullable=False, default="ACCEPTED", index=True) # ACCEPTED, IN_PROGRESS, COMPLETED, RATED, DISPUTED
    
    # Relationships
    job = relationship("Job", back_populates="bookings")
    customer = relationship("User", foreign_keys=[customer_id])
    worker = relationship("User", foreign_keys=[worker_id])
    reviews = relationship("Review", back_populates="booking", cascade="all, delete-orphan")