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


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


class BulkOperationCreate(BaseModel):
    user_id: int
    items: List[OperationCreate]


class TrashOperationCreate(BaseModel):
    barcode: str
    quantity: float
    user_id: int
    reason: Optional[str] = "unspecified"


# --- Sync ---
class SyncOperation(BaseModel):
    type: str  # 'CHECK_IN', 'CHECK_OUT'
    barcode: str
    quantity: float
    uuid: Optional[str] = None
    timestamp: datetime


class SyncPayload(BaseModel):
    user_id: int
    operations: List[SyncOperation]


# --- Audit Logs ---
class AuditLogResponse(BaseModel):
    id: int
    timestamp: datetime
    user_id: int
    username: Optional[str] = None
    action: str
    target_item_id: Optional[int]
    target_item_name: Optional[str] = None
    target_item_pn: Optional[str] = None
    target_item_barcode: Optional[str] = None
    target_snapshot: Optional[str] = None
    quantity_change: Optional[float]
    details: Optional[str] = None

    class Config:
        from_attributes = True