"""Booking model."""
from datetime import datetime

from sqlalchemy import Column, DateTime, ForeignKey, Integer, String
from sqlalchemy.orm import relationship

from app.db.session import Base


class Booking(Base):
    """Booking model for space reservations."""

    __tablename__ = "bookings"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    space_id = Column(Integer, ForeignKey("spaces.id"), nullable=False, index=True)
    title = Column(String, nullable=False)
    description = Column(String, nullable=True)
    start_datetime = Column(DateTime, nullable=False, index=True)
    end_datetime = Column(DateTime, nullable=False, index=True)
    status = Column(
        String, nullable=False, default="pending", index=True
    )  # pending/approved/rejected/canceled
    rejection_reason = Column(String, nullable=True)
    cancellation_reason = Column(String, nullable=True)
    approved_by = Column(Integer, ForeignKey("users.id"), nullable=True)
    google_calendar_event_id = Column(String, nullable=True)  # Store Google Calendar event ID
    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)

    # Relationships
    user = relationship("User", foreign_keys=[user_id], backref="bookings")
    space = relationship("Space", foreign_keys=[space_id], backref="bookings")
    approver = relationship("User", foreign_keys=[approved_by], backref="approved_bookings")
    notifications = relationship("Notification", back_populates="booking")
    attachments = relationship("Attachment", back_populates="booking", cascade="all, delete-orphan")