import type { EtcBillResponse, EtcOverviewResponse, EtcTollRecordResponse } from './types';

export interface EtcRecordReconciliation {
  matches: boolean;
  passageCountDifference: number;
  vehicleCountDifference: number;
  tollAmountDifference: number;
  serviceFeeDifference: number;
  totalAmountDifference: number;
}

export interface EtcBillReconciliation {
  matches: boolean;
  billCountDifference: number;
  receivableAmountDifference: number;
  paidAmountDifference: number;
}

function hundredths(value: number): number {
  return Math.round(value * 100);
}

export function reconcileEtcRecords(
  kpi: EtcOverviewResponse['kpi'],
  records: EtcTollRecordResponse,
): EtcRecordReconciliation {
  const tollDifference = hundredths(records.summary.tollAmount) - hundredths(kpi.tollAmount);
  const serviceFeeDifference = hundredths(records.summary.serviceFee) - hundredths(kpi.serviceFee);
  const totalDifference = hundredths(records.summary.totalAmount) - hundredths(kpi.totalAmount);
  const passageCountDifference = records.total - kpi.passageCount;
  const vehicleCountDifference = records.summary.vehicleCount - kpi.vehicleCount;

  return {
    matches: passageCountDifference === 0
      && vehicleCountDifference === 0
      && tollDifference === 0
      && serviceFeeDifference === 0
      && totalDifference === 0,
    passageCountDifference,
    vehicleCountDifference,
    tollAmountDifference: tollDifference / 100,
    serviceFeeDifference: serviceFeeDifference / 100,
    totalAmountDifference: totalDifference / 100,
  };
}

export function reconcileEtcBills(
  kpi: EtcOverviewResponse['kpi'],
  bills: EtcBillResponse,
): EtcBillReconciliation {
  const receivableDifference = hundredths(bills.summary.receivableAmount) - hundredths(kpi.receivableAmount);
  const paidDifference = hundredths(bills.summary.paidAmount) - hundredths(kpi.paidAmount);
  const billCountDifference = bills.total - kpi.billCount;

  return {
    matches: billCountDifference === 0 && receivableDifference === 0 && paidDifference === 0,
    billCountDifference,
    receivableAmountDifference: receivableDifference / 100,
    paidAmountDifference: paidDifference / 100,
  };
}