from pydantic import BaseModel, Field

from typing import Optional, List

from datetime import datetime

class ProcurementRequest(BaseModel):

"""Model for a procurement request submitted by a user."""

id: Optional[str] = None

title: str

description: str

estimated_budget: Optional[float] = None

timeline: Optional[str] = None

department: Optional[str] = None

requester: Optional[str] = None

required_by_date: Optional[datetime] = None

additional_notes: Optional[str] = None

created_at: datetime = Field(default_factory=datetime.now)

class ClassificationResult(BaseModel):

"""Model for the result of classification."""

request_id: str

category: str

confidence: float

reasoning: str