from pydantic import BaseModel, Field, PositiveFloat, PositiveInt

# Base schema
class ProductBase(BaseModel):
    name: str = Field(..., description="Product name")
    description: str | None = Field(None, description="Product description")
    price: PositiveFloat = Field(..., description="Product price")
    stock_quantity: PositiveInt = Field(..., description="Product stock quantity")

# Create schema
class ProductCreate(ProductBase):
    pass

    class Config:
        schema_extra = {
            "example": {
                "name": "Product X",
                "description": "This is a description of Product X",
                "price": 9.99,
                "stock_quantity": 100
            }
        }

# Response schema
class Product(ProductBase):
    id: int

    class Config:
        orm_mode = True