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

# --- Items ---
class ItemBase(BaseModel):
    name: str
    category: str
    barcode: str
    quantity: float = 0.0
    min_quantity: float = 1.0
    image_url: Optional[str] = None
    labels_data: Optional[str] = None

class ItemCreate(ItemBase):
    pass

class Item(ItemBase):
    id: int

    class Config:
        from_attributes = True

# --- Operations (Check-in/Check-out Validation) ---
class OperationCreate(BaseModel):
    barcode: str
    quantity: float
    user_id: int

# --- Audit Logs ---
class AuditLogResponse(BaseModel):
    id: int
    timestamp: datetime
    user_id: int
    action: str
    target_item_id: Optional[int]
    quantity_change: Optional[float]

    class Config:
        from_attributes = True