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

from app.db.database import Base
from datetime import datetime


class OrderStatus(str, enum.Enum):
    PENDING = "pending"
    PROCESSING = "processing"
    SHIPPED = "shipped"
    DELIVERED = "delivered"
    CANCELLED = "cancelled"


class Order(Base):
    __tablename__ = "orders"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    total_amount = Column(Float, nullable=False)
    status = Column(Enum(OrderStatus), default=OrderStatus.PENDING)
    shipping_address = Column(String, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    # Relationships
    user = relationship("User", back_populates="orders")
    items = relationship(
        "OrderItem", back_populates="order", cascade="all, delete-orphan"
    )


class OrderItem(Base):
    __tablename__ = "order_items"

    id = Column(Integer, primary_key=True, index=True)
    order_id = Column(Integer, ForeignKey("orders.id"), nullable=False)
    book_id = Column(Integer, ForeignKey("books.id"), nullable=False)
    quantity = Column(Integer, nullable=False)
    unit_price = Column(Float, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    # Relationships
    order = relationship("Order", back_populates="items")
    book = relationship("Book", back_populates="order_items")