import { GroupKey, ReportData } from "../../features/report";
import {
  extractFilteredTransactions,
  aggregateTransactions,
} from "../report.helpers";

export interface PayeeItem {
  name: string;
  amount: number;
}

export function extractTopPayees(
  reportData: ReportData,
  flow: "outflows" | "inflows",
  selectedPeriodId?: string | null,
  selectedGroupKey?: GroupKey | null
): { items: PayeeItem[]; total: number } {
  const txns = extractFilteredTransactions(reportData, selectedPeriodId, selectedGroupKey);

  const { items, total } = aggregateTransactions(txns, (txn) => {
    if (txn.payee && txn.payee.name) {
      return [txn.payee.name];
    }
    return [];
  });

  return {
    items,
    total,
  };
}