from datetime import datetime, UTC
from app import db


class Product(db.Model):
    """Product model"""
    __tablename__ = "products"
    
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(200), nullable=False, index=True)
    description = db.Column(db.Text)
    price = db.Column(db.Numeric(10, 2), nullable=False)
    stock = db.Column(db.Integer, default=0)
    image_url = db.Column(db.String(500))
    is_active = db.Column(db.Boolean, default=True)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(UTC))
    updated_at = db.Column(db.DateTime, default=lambda: datetime.now(UTC), onupdate=lambda: datetime.now(UTC))
    
    # Relationships
    order_items = db.relationship("OrderItem", back_populates="product", lazy="dynamic")
    
    def to_dict(self):
        """Convert product to dictionary"""
        return {
            "id": self.id,
            "name": self.name,
            "description": self.description,
            "price": float(self.price) if self.price else None,
            "stock": self.stock,
            "image_url": self.image_url,
            "is_active": self.is_active,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None
        }
    
    def __repr__(self):
        return f"<Product {self.name}>"