from fastapi import APIRouter
from pydantic import BaseModel


INDEX = "费用收入比（%）"

router = APIRouter()


class Params(BaseModel):
    营业成本: float
    管理费用: float
    营业收入: float


@router.post("/{}".format(INDEX))
def func(p: Params):
    try:
        result = (p.营业成本 + p.管理费用) / p.营业收入 * 100
        return round(result, 2)

    except ZeroDivisionError:
        return "算式无意义"
    except Exception:
        return "计算错误"