#include "Drone.h"
#include <cmath>
#include <iostream>

// #define DEBUG

float Drone::calculateChange(float total, float paid) { return paid - total; }

void Drone::returnChange(float change) {
  float restChange = change;
  std::cout << "Restbetrag: " << restChange << std::endl;
  std::sort(availableCashInstances, availableCashInstances + CashInstanceSize,
            std::greater<>());
  for (int i = 0; i < CashInstanceSize; i++) {
    if (availableCashInstances[i].value >= restChange) {
    }
    while (restChange >= availableCashInstances[i].value &&
           availableCashInstances[i].availableAmount > 0) {
      std::cout << availableCashInstances[i].value << " " << std::flush;
#ifdef DEBUG
      std::cout << "restChange: " << restChange
                << " Current Coin: " << availableCashInstances[i].value
                << std::flush << std::endl;
#endif
      availableCashInstances[i].availableAmount--;
      restChange =
          std::round((restChange - availableCashInstances[i].value) * 100) /
          100;
    }
  }
  std::cout << std::endl;
  if (restChange > 0.009) {
    for (int i = CashInstanceSize - 1; i >= 0; i--) {
      if (availableCashInstances[i].value >= restChange &&
          availableCashInstances[i].availableAmount > 0) {
        availableCashInstances[i].availableAmount--;
        restChange =
            std::round((restChange - availableCashInstances[i].value) * 100) /
            100;
        std::cout << "Warnung: Rückgeld kann nicht genau herausgegeben werden! "
                     "Ausbezahlter Betrag überschreitet den genauen Wert um "
                  << restChange * (-1) << std::endl;
        return;
      }
    }
    std::cout << "Nicht genügend Restgeld vorhanden! Fehlender Betrag: "
              << restChange << std::endl;
  }
}