from datetime import datetime
from typing import Optional

from pydantic import BaseModel


# Shared properties
class ProductBase(BaseModel):
    name: Optional[str] = None
    description: Optional[str] = None
    sku: Optional[str] = None
    barcode: Optional[str] = None
    price: Optional[float] = None
    cost_price: Optional[float] = None
    min_stock_level: Optional[int] = None
    max_stock_level: Optional[int] = None
    is_active: Optional[bool] = True
    category_id: Optional[str] = None
    supplier_id: Optional[str] = None


# Properties to receive via API on creation
class ProductCreate(ProductBase):
    name: str
    price: float


# Properties to receive via API on update
class ProductUpdate(ProductBase):
    pass


# Properties for stock update
class StockUpdate(BaseModel):
    quantity: int
    notes: Optional[str] = None


# Properties to return via API
class ProductInDB(ProductBase):
    id: str
    name: str
    current_stock: int
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


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


# Properties for product with category and supplier details
class ProductWithDetails(Product):
    category: Optional["CategoryMinimal"] = None
    supplier: Optional["SupplierMinimal"] = None

    class Config:
        from_attributes = True


# Minimal category representation for product response
class CategoryMinimal(BaseModel):
    id: str
    name: str

    class Config:
        from_attributes = True


# Minimal supplier representation for product response
class SupplierMinimal(BaseModel):
    id: str
    name: str

    class Config:
        from_attributes = True


# Update recursive forward references
ProductWithDetails.model_rebuild()