import { storeToRefs } from 'pinia';
import { useConfigStore } from 'src/stores/config';

const configStore = useConfigStore();
const { data: config } = storeToRefs(configStore);

export function precisionRound(number: number, precision = 2) {
  const factor = Math.pow(10, precision);
  return Math.round(number * factor) / factor;
}

export function calculatePrice(
  data: {
    price: number;
    vat?: number;
    discount?: number;
    amount?: number;
    calcVat?: boolean;
    vatIncluded?: boolean;
    output: 'vat' | 'total' | 'beforeVat';
  } = {
    price: 0,
    vat: 0.07,
    discount: 0,
    amount: 1,
    calcVat: false,
    vatIncluded: false,
    output: 'total',
  },
) {
  const {
    price,
    vat = config.value?.vat || 0.07,
    discount = 0,
    amount = 1,
    calcVat = false,
    vatIncluded = false,
    output = 'total',
  } = data;

  // Calculate VAT
  const calculatedVat = calcVat
    ? precisionRound((price * amount - discount) * vat)
    : 0;

  // Calculate total
  const total = precisionRound(
    price * amount -
      discount +
      precisionRound(
        calcVat ? price * (discount ? amount : 1) - discount * vat : 0,
      ),
  );

  // Calculate before VAT
  const beforeVat = vatIncluded ? precisionRound(price / (1 + vat)) : price;

  // Return based on output selection
  if (output === 'vat') return calculatedVat;
  if (output === 'total') return total;
  if (output === 'beforeVat') return beforeVat;
  return 0;
}