from pydantic import BaseModel, Field
from typing import Optional

class ProductBase(BaseModel):
    name: str = Field(..., min_length=1, description="Product name")
    description: Optional[str] = Field(None, description="Product description")
    price: float = Field(..., gt=0, description="Product price")
    stock: int = Field(default=0, ge=0, description="Product stock quantity")
    sku: str = Field(..., min_length=1, description="Product SKU")
    is_active: bool = Field(default=True, description="Product status")

class ProductCreate(ProductBase):
    class Config:
        schema_extra = {
            "example": {
                "name": "Sample Product",
                "description": "A detailed product description",
                "price": 29.99,
                "stock": 100,
                "sku": "PROD-001",
                "is_active": True
            }
        }

class Product(ProductBase):
    id: int = Field(..., description="Product ID")

    class Config:
        orm_mode = True
        schema_extra = {
            "example": {
                "id": 1,
                "name": "Sample Product",
                "description": "A detailed product description",
                "price": 29.99,
                "stock": 100,
                "sku": "PROD-001",
                "is_active": True
            }
        }