from pydantic import BaseModel, Field
from typing import Optional
from datetime import datetime


# Shared properties
class ProductBase(BaseModel):
    name: str
    description: Optional[str] = None
    sku: str
    barcode: Optional[str] = None
    category_id: Optional[str] = None
    supplier_id: Optional[str] = None
    cost_price: float = Field(ge=0)
    selling_price: float = Field(ge=0)
    reorder_level: int = Field(ge=0, default=0)
    is_active: bool = True


# Properties to receive via API on creation
class ProductCreate(ProductBase):
    pass


# Properties to receive via API on update
class ProductUpdate(ProductBase):
    name: Optional[str] = None
    sku: Optional[str] = None
    cost_price: Optional[float] = None
    selling_price: Optional[float] = None


class ProductInDBBase(ProductBase):
    id: str
    current_stock: int
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


# Additional properties to return via API
class Product(ProductInDBBase):
    pass