from pydantic import BaseModel, ConfigDict
from typing import List, Optional, Union
from datetime import datetime

class OCItem(BaseModel):
    correlative: Optional[int] = None
    product_code: Optional[str] = None
    name: str
    description: Optional[str] = None
    quantity: float
    unit: str
    price: Optional[float] = None
    total: Optional[float] = None

class PurchaseOrder(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    
    code: str
    name: str
    status: str
    status_code: Optional[str] = None
    buyer: str
    buyer_rut: Optional[str] = None
    provider: str
    provider_rut: Optional[str] = None
    date_creation: Union[str, datetime, None] = None
    total_amount: Optional[float] = None
    currency: Optional[str] = None
    type: Optional[str] = None
    items: List[OCItem] = []
    raw_data: Optional[dict] = None