import { PurchaseAmountItem } from "../../../types";

export function useExchangedData(
  data: PurchaseAmountItem[],
  shouldExchange: boolean,
  toCurrency: string = "SEK",
  exchangeRates: Record<string, number> = sekExchangeRates,
) {
  const exchangedData = data.map((item) => {
    if (shouldExchange && item.currency.toUpperCase() in exchangeRates) {
      return {
        ...item,
        amount: (
          parseFloat(item.amount) *
          exchangeRates[item.currency.toUpperCase() as keyof typeof exchangeRates]
        ).toFixed(2),
        currency: shouldExchange ? toCurrency : item.currency,
      };
    }

    return {
      ...item,
      amount: item.amount,
      currency: item.currency,
    };
  });

  const totalAmount = exchangedData.reduce((acc, item) => {
    return acc + parseFloat(item.amount);
  }, 0);

  const onlyExchangedCurrency = exchangedData.every(
    (item) => item.currency.toUpperCase() === toCurrency.toUpperCase(),
  );

  const exchangeAvailable = data.some(
    (item) =>
      item.currency.toUpperCase() in exchangeRates &&
      item.currency.toUpperCase() !== toCurrency.toUpperCase(),
  );

  return {
    exchangedData,
    totalAmount,
    onlyExchangedCurrency,
    exchangeAvailable,
  };
}

const sekExchangeRates = {
  EUR: 11.5,
  USD: 10.5,
  SEK: 1,
  GBP: 13.5,
};