#include "calculator_functions.h"
#include "payment_option.h"
#include "utilities.h"
#include "tariff_log.h"
#include "tariff_time_range.h"
#include "ticket.h"

#include <sstream>
#include <algorithm>
#include <QDateTime>
#include <QScopedArrayPointer>
#include <QDebug>

double total_duration_min = 0.0f;
double total_cost = 0.0f;
bool overtime = false;

#ifdef _WIN32
inline struct tm* localtime_r(const time_t *clock, struct tm* result){
    if(!clock || !result) return NULL;
    memcpy(result,localtime(clock),sizeof(*result));
    return result;
}
#endif

QDateTime Calculator::GetDailyTicketDuration(Configuration* cfg, const QDateTime start_datetime, uint8_t payment_option, bool carry_over)
{
    if(!start_datetime.isValid()) {
        return QDateTime();
    }

    double day_price = 0.0f;
    int current_special_day_id = -1;
    bool is_special_day = Utilities::CheckSpecialDay(cfg, start_datetime.toString(Qt::ISODate).toStdString().c_str(), &current_special_day_id, &day_price);

    QDateTime inputDateTime = start_datetime;
    QTime worktime_from;
    QTime worktime_to;

    int daily_card_price = cfg->PaymentOption.find(payment_option)->second.pop_daily_card_price;
    if(daily_card_price <= 0) {
        qCritical() << "Calculator::GetDailyTicketDuration(): Daily ticket price zero or less";
        return QDateTime();
    }

    if(is_special_day)
    {
        worktime_from = QTime::fromString(cfg->SpecialDaysWorktime.find(current_special_day_id)->second.pedwt_time_from.c_str(), Qt::ISODate);
        worktime_to = QTime::fromString(cfg->SpecialDaysWorktime.find(current_special_day_id)->second.pedwt_time_to.c_str(),Qt::ISODate);

        if(inputDateTime.time() < worktime_from) inputDateTime.setTime(worktime_from);
        if(carry_over) inputDateTime.setTime(worktime_from);

        if(inputDateTime.time() >= worktime_to)
        {
            // Go to next day if outside worktime
            inputDateTime = inputDateTime.addSecs(86400);
            return GetDailyTicketDuration(cfg,inputDateTime, payment_option,true);
        }

        if(day_price <=0)
        {
            // Go to next day if special day price is 0
            inputDateTime = inputDateTime.addSecs(86400);
            return GetDailyTicketDuration(cfg,inputDateTime, payment_option,true);
        }

        int diff = abs(inputDateTime.time().secsTo(worktime_to));
        inputDateTime = inputDateTime.addSecs(diff);

        //qDebug() << "Ticket is valid until: " << inputDateTime.toString(Qt::ISODate) << "price = " << daily_card_price << ", duration = " << diff / 60;
        return inputDateTime;
    }
    else
    {
        // Get day of week
        int const weekdayId = inputDateTime.date().dayOfWeek();

        // If no working day found, skip it (recursively call method again)
        size_t found = cfg->WeekDaysWorktime.count(weekdayId);

        // When no workday found, go to next available day
        if(found <=0)
        {
            inputDateTime = inputDateTime.addSecs(86400);
            return GetDailyTicketDuration(cfg,inputDateTime, payment_option,true);
        }
        else
        {
            worktime_from = QTime::fromString(cfg->WeekDaysWorktime.find(weekdayId)->second.pwd_time_from.c_str(),Qt::ISODate);
            worktime_to = QTime::fromString(cfg->WeekDaysWorktime.find(weekdayId)->second.pwd_time_to.c_str(),Qt::ISODate);
            if(inputDateTime.time() < worktime_from)
                inputDateTime.setTime(worktime_from);

            if(carry_over)
                inputDateTime.setTime(worktime_from);

            if(inputDateTime.time() >= worktime_to)
            {
                // Go to next day if outside worktime
                inputDateTime = inputDateTime.addSecs(86400);
                return GetDailyTicketDuration(cfg,inputDateTime, payment_option,true);
            }

            int diff = abs(inputDateTime.time().secsTo(worktime_to));
            inputDateTime = inputDateTime.addSecs(diff);

            //qDebug() << "Ticket is valid until: " << inputDateTime.toString(Qt::ISODate) << "price = " << daily_card_price << ", duration = " << diff / 60;            
            return inputDateTime;
        }
    }

    return QDateTime();
}
/// <inheritdoc/>
std::string Calculator::GetDurationFromCost(Configuration* cfg,
                                            uint8_t payment_option,
                                            char const* start_datetime, // given in local time
                                            double price,
                                            bool nextDay,
                                            bool prepaid)
{
    Q_UNUSED(payment_option);
    Q_UNUSED(nextDay);

    // Get input date
    QDateTime inputDate = QDateTime::fromString(start_datetime,Qt::ISODate);

    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    if (paymentMethodId == PaymentMethod::Steps) {
        if (tariffIs24_7(cfg)) {
            // use tariff with structure as for instance Schoenau, Koenigsee:
            // without given YearPeriod, SpecialDays and SpecialDaysWorktime
            inputDate = inputDate.addSecs(GetDurationForPrice(cfg, price) * 60);
            return inputDate.toString(Qt::ISODate).toStdString();
        } else {
            QDateTime const &start = QDateTime::fromString(start_datetime, Qt::ISODate);
            if (Utilities::IsYearPeriodActive(cfg, start)) {
                if (!prepaid) {
                    BusinessHours businessHours = Utilities::getBusinessHours(cfg, paymentMethodId);
                    if (businessHours == BusinessHours::OnlyWeekDays) {
                        int const weekdayId = start.date().dayOfWeek();

                        using WTIterator = std::multimap<int, ATBWeekDaysWorktime>::const_iterator;
                        std::pair<WTIterator, WTIterator> p = cfg->WeekDaysWorktime.equal_range(weekdayId);

                        for (WTIterator itr = p.first; itr != p.second; ++itr) {
                            QTime const &from = Utilities::WeekDaysWorkTimeFrom(itr);
                            QTime const &until = Utilities::WeekDaysWorkTimeUntil(itr);
                            QTime const& startTime = start.time();

                            if (from <= startTime && startTime <= until) {
                                return inputDate.addSecs(GetDurationForPrice(cfg, price) * 60).toString(Qt::ISODate).toStdString();
                            }
                        }
                    }
                }

                qCritical() << __PRETTY_FUNCTION__ << "NOT YET IMPLEMENTED";
                return 0;
            }
        }
    }

    Ticket t = private_GetDurationFromCost(cfg, inputDate, price, prepaid);

    // qCritical().noquote() << t;

    // TODO: im fehlerfall
    return t.getValidUntil().toString(Qt::ISODate).toStdString();
}

///////////////////////////////////////

/// <inheritdoc/>
///

uint32_t Calculator::GetCostFromDuration(Configuration *cfg,
                                         QDateTime const &start,
                                         quint64 timeStepInMinutes) const {
    // for instance, a tariff as used in Schoenau, Koenigssee: only steps, no
    // special days, nonstop.
    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    if (paymentMethodId == PaymentMethod::Steps) {
        QDateTime const end = start.addSecs(timeStepInMinutes*60);
        return GetCostFromDuration(cfg, start, end);
    }
    return 0;
}

uint32_t Calculator::GetCostFromDuration(Configuration * cfg,
                                         QDateTime const &start,
                                         QDateTime const &end) const {
    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    if (paymentMethodId == PaymentMethod::Steps) {
        int const timeStepInMinutes = start.secsTo(end) / 60;
        return GetPriceForTimeStep(cfg, timeStepInMinutes);
    }
    return 0;
}




///////////////////////////////////////

/// <inheritdoc/>
double Calculator::GetCostFromDuration(Configuration* cfg,
                                       uint8_t payment_option,
                                       const QDateTime start_datetime,
                                       QDateTime &end_datetime,
                                       int durationMinutes,
                                       bool nextDay,
                                       bool prepaid) {
    Q_UNUSED(payment_option);
    Q_UNUSED(nextDay);

    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    if (paymentMethodId == PaymentMethod::Steps) {
        if (tariffIs24_7(cfg)) {
            end_datetime = start_datetime.addSecs(durationMinutes*60);
            return GetCostFromDuration(cfg, start_datetime, end_datetime);
        } else {
            if (Utilities::IsYearPeriodActive(cfg, start_datetime)) {
                if (!prepaid) {
                    BusinessHours businessHours = Utilities::getBusinessHours(cfg, paymentMethodId);
                    if (businessHours == BusinessHours::OnlyWeekDays) {
                        int const weekdayId = start_datetime.date().dayOfWeek();

                        using WTIterator = std::multimap<int, ATBWeekDaysWorktime>::const_iterator;
                        std::pair<WTIterator, WTIterator> p = cfg->WeekDaysWorktime.equal_range(weekdayId);

                        for (WTIterator itr = p.first; itr != p.second; ++itr) {
                            QTime const &from = Utilities::WeekDaysWorkTimeFrom(itr);
                            QTime const &until = Utilities::WeekDaysWorkTimeUntil(itr);
                            QTime const &startTime = start_datetime.time();

                            if (from <= startTime && startTime <= until) {
                                end_datetime = start_datetime.addSecs(durationMinutes*60);
                                return GetCostFromDuration(cfg, start_datetime, end_datetime);
                            }
                        }
                    }
                }

                qCritical() << __PRETTY_FUNCTION__ << "NOT YET IMPLEMENTED";
                end_datetime = QDateTime();
                return 0;
            }
        }
    }

    QDateTime start = start_datetime;

    Ticket t = private_GetCostFromDuration(cfg, start,
                                           durationMinutes,
                                           prepaid);
    if (t) {
        // qCritical().noquote() << t;
    }

    end_datetime = t.getValidUntil();

    return t.getPrice();
}

bool Calculator::checkDurationMinutes(int minParkingTime,
                                      int maxParkingTime,
                                      int durationMinutes) {
    if (durationMinutes > maxParkingTime) {
        qWarning() << QString("Total duration >= max_min (%1 >= %2)").arg(durationMinutes).arg(maxParkingTime);
        return false;
    }
    if (durationMinutes < minParkingTime) {
        qWarning() << QString("Total duration <= minMin (%1 <= %2)").arg(durationMinutes).arg(minParkingTime);
        return false;
    }

    return true;
}

int Calculator::findWorkTimeRange(QDateTime const &dt,
                                  QScopedArrayPointer<TariffTimeRange> const &worktime,
                                  size_t size) {
    for (size_t w = 0; w < size; ++w) {
        QTime const &worktime_from = worktime[w].getTimeFrom();
        QTime const &worktime_to = worktime[w].getTimeUntil();

        if ((dt.time() >= worktime_from) && (dt.time() < worktime_to)) {
            return w;
        }
    }
    return -1;
}

int Calculator::findNextWorkTimeRange(QDateTime const &dt,
                                      QScopedArrayPointer<TariffTimeRange> const &worktime,
                                      size_t size) {
    int nextWorkTimeRange = -1;
    for (size_t w = 0; w < size; ++w) {
        QTime const &worktime_from = worktime[w].getTimeFrom();

        if (dt.time() < worktime_from) {
            nextWorkTimeRange = w;
            break;
        }
    }
    return nextWorkTimeRange;
}

using namespace Utilities;

Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
                                               QDateTime const &start,
                                               int durationMinutes, // Netto
                                               bool prepaid) {

    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    static const bool carryOverNotSet = isCarryOverNotSet(cfg, paymentMethodId);
    static const int minParkingTimeMinutes = Utilities::getMinimalParkingTime(cfg, paymentMethodId);
    static const int maxParkingTimeMinutes = Utilities::getMaximalParkingTime(cfg, paymentMethodId);
    static const bool checkMinMaxMinutes = (minParkingTimeMinutes < maxParkingTimeMinutes);
    static const int durationMinutesNetto = durationMinutes;
    static const uint32_t weekDaysPrice = Utilities::computeWeekDaysPrice(cfg, paymentMethodId);
    static const double weekDaysDurationUnit = Utilities::computeWeekDaysDurationUnit(cfg, paymentMethodId);
    static const double specialDaysDurationUnit = 60.0;

    if (!checkMinMaxMinutes) {
        qCritical() << QString(
            "ERROR: CONDITION minMin < maxMin (%1 < %2) IS NOT VALID")
                .arg(minParkingTimeMinutes).arg(maxParkingTimeMinutes);
        return Ticket();
    }

    if (!checkDurationMinutes(minParkingTimeMinutes,
                              maxParkingTimeMinutes, durationMinutes)) {
        return Ticket();
    }

    uint32_t price = 0;
    uint32_t costFromDuration = 0;
    double durationUnit = 0.0;
    int specialDayId = -1;
    bool isSpecialDay = false;
    Ticket ticket;
    QDateTime end = start;
    QDateTime current;
    int totalTimeRanges = 0;

    for (current = start; durationMinutes > 0; current = current.addDays(1)) {
        int const weekdayId = current.date().dayOfWeek();

        specialDayId = -1;

        // find worktime ranges for the current day
        int const timeRanges = std::max((int)cfg->WeekDaysWorktime.count(weekdayId), 1);
        QScopedArrayPointer<TariffTimeRange> worktime(new TariffTimeRange[timeRanges]);
        int ranges = 0;

        if((isSpecialDay = Utilities::CheckSpecialDay(cfg, current, &specialDayId, &price))) {
            // Set special day price:
            durationUnit = specialDaysDurationUnit;
            worktime[ranges].setTimeRange(SpecialDaysWorkTimeFrom(cfg, specialDayId),
                                          SpecialDaysWorkTimeUntil(cfg, specialDayId));
            ranges = 1;
        } else {
            // Set new price for the normal day: do not use a floating-point type
            // for the price, rather compute with integers. Only at the very end of
            // the computation the price is divided by durationUnit.
            price = weekDaysPrice;
            durationUnit = weekDaysDurationUnit;

            // If no working day found, skip it (epsecially Sundays!)
            if (cfg->WeekDaysWorktime.count(weekdayId) <= 0) {
                qDebug() << "No workday found, trying to find next available day";
                end = current;
                current.setTime(QTime()); // start at midnight on the next day
                continue;
            }

            using WTIterator = std::multimap<int, ATBWeekDaysWorktime>::const_iterator;
            std::pair<WTIterator, WTIterator> p = cfg->WeekDaysWorktime.equal_range(weekdayId);

            for (WTIterator itr = p.first; itr != p.second; ++itr) {
                worktime[ranges].setTimeRange(WeekDaysWorkTimeFrom(itr),
                                              WeekDaysWorkTimeUntil(itr));
                ranges += 1;
            }
        }

        QTime const &lastWorktimeTo = worktime[ranges-1].getTimeUntil();

        // qCritical() << "start" << start.toString(Qt::ISODate)
        //             << "current" << current.toString(Qt::ISODate) << lastWorktimeTo;

        // find worktime range to start with
        int currentRange = 0;
        if (!isSpecialDay) {
            if (start != current) { // on next day
                current.setTime(worktime[currentRange].getTimeFrom());
            } else {
                // check if inputDate is located inside a valid worktime-range...
                if ((currentRange = findWorkTimeRange(current, worktime, ranges)) == -1) {
                    if (!prepaid && carryOverNotSet) {       // parking is not allowed
                        return Ticket(start, QDateTime(), durationMinutesNetto, 0,
                                      0, Ticket::s[INVALID_FROM_DATETIME]);
                    }
                    // find the next worktime-range (on the same day), and start from there
                    if ((currentRange = findNextWorkTimeRange(current, worktime, ranges)) == -1) {
                        end = current;
                        continue;
                    }
                    current.setTime(worktime[currentRange].getTimeFrom());
                }
            }
        }

        // qCritical() << "current" << current.toString(Qt::ISODate);

        for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
            if (durationMinutes > 0) {
                QTime const &worktime_from = worktime[w].getTimeFrom();
                QTime const &worktime_to = worktime[w].getTimeUntil();

                if (totalTimeRanges) {
                    // durationMinutes are always meant as netto time and
                    // the time between worktime-ranges are free.
                    current.setTime(worktime_from);
                }

                if (price == 0) {
                    end = current;
                    current.setTime(QTime());
                    continue;
                }

                if (current.time() == worktime_to) {
                    end = current;
                    current.setTime(QTime());
                    continue;
                }

                // Check prepaid
                if (!prepaid) {
                    if ((current.time() < worktime_from) || (current.time() > worktime_to)) {
                        qDebug() << "[STOP] * Ticket is not valid * ";
                        return Ticket();
                    }
                } else {
                    //qDebug() << "* PREPAID MODE ACTIVE *";
                    //qCritical() << "current" << current.toString(Qt::ISODate) << worktime_from << lastWorktimeTo;
                    if (current.time() < worktime_from) {
                        current.setTime(worktime_from);
                        end = current;
                    } else if(current.time() > lastWorktimeTo) {
                        //qDebug() << " *** PREPAID *** Current time is past the time range end, searching for next available day";
                        end = current;
                        current.setTime(QTime());
                        continue;
                    }
                }

                while(durationMinutes > 0) {
                    // Check for active year period
                    if (!IsYearPeriodActive(cfg, current)) {
                        return Ticket();
                    }
                    if(current.time() >= lastWorktimeTo) {
                        // Go to next day if minutes not spent
                        if (carryOverNotSet) {
                            // no carry_over, so stop computation
                            break;
                        }
                        current.setTime(QTime());
                        break; // stop while, and continue in outer loop
                    } else {
                        //qCritical() << "current" << current.toString(Qt::ISODate) << worktime_to;
                        if(current.time() < worktime_to) {
                            // Increment input date minutes for each monetary unit
                            current = current.addSecs(60);
                            end = current;
                            durationMinutes -= 1;
                            //costFromDuration += price_per_unit;
                            costFromDuration += price;
                            //qCritical() << "current" << current.toString(Qt::ISODate);
                        } else break;
                    }
                } // while(durationMinutes > 0) {
            } // if (durationMinutes > 0) {
        } // for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
    } // for (current = start; durationMinutes > 0; current = current.addDays(1)) {

    int durationMinutesBrutto =  start.secsTo(end) / 60;

    return
        Ticket(start, end, durationMinutesNetto, durationMinutesBrutto,
               ceil(Utilities::CalculatePricePerUnit(costFromDuration, durationUnit)),
               Ticket::s[VALID]);
}


Ticket Calculator::private_GetDurationFromCost(Configuration *cfg,
                                               QDateTime const &start,
                                               uint32_t cost,
                                               bool prepaid) {
    // Get input date
    QDateTime current = start;

    static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
    static const bool carryOverNotSet = isCarryOverNotSet(cfg, paymentMethodId);
    static const uint32_t minParkingTimeMinutes = std::max(Utilities::getMinimalParkingTime(cfg, paymentMethodId), 0);
    static const uint32_t maxParkingTimeMinutes = std::max(Utilities::getMaximalParkingTime(cfg, paymentMethodId), 0);
    static const uint32_t minParkingPrice = getMinimalParkingPrice(cfg, paymentMethodId);
    // static const bool checkMinMaxMinutes = (minParkingTimeMinutes < maxParkingTimeMinutes);
    static const uint32_t weekDaysPrice = Utilities::computeWeekDaysPrice(cfg, paymentMethodId);
    static const uint32_t weekDaysDurationUnit = Utilities::computeWeekDaysDurationUnit(cfg, paymentMethodId);
    static const uint32_t specialDaysDurationUnit = 60;

    if(cost < minParkingPrice) {
        uint64_t const durationMinutes = GetDurationForPrice(cfg, cost);
        return Ticket(start, current, durationMinutes, durationMinutes,
                   cost, Ticket::s[INVALID_PRICE]);
    }
    if (minParkingTimeMinutes >= maxParkingTimeMinutes) {
        // TODO
        return Ticket();
    }
    if (maxParkingTimeMinutes <= minParkingTimeMinutes) {
        // TODO
        return Ticket();
    }

    uint32_t durationMinutesNetto = 0;
    double moneyLeft = cost;
    double durationUnit = 1;
    int specialDayId = -1;
    bool isSpecialDay = false;
    QDateTime end = start;
    int totalTimeRanges = 0;
    double price = 0;

    for (current = start; moneyLeft > 0 && moneyLeft >= price; current = current.addDays(1)) {
        int const weekdayId = current.date().dayOfWeek();

        specialDayId = -1;

        // find worktime ranges for the current day
        int const timeRanges = std::max((int)cfg->WeekDaysWorktime.count(weekdayId), 1);
        QScopedArrayPointer<TariffTimeRange> worktime(new TariffTimeRange[timeRanges]);
        int ranges = 0;

        uint32_t p = 0;
        if((isSpecialDay = Utilities::CheckSpecialDay(cfg, current, &specialDayId, &p))) {
            // Set special day price:
            durationUnit = specialDaysDurationUnit;
            price = p / durationUnit;
            price = std::round(price * 1000.0) / 1000.0;
            worktime[ranges].setTimeRange(SpecialDaysWorkTimeFrom(cfg, specialDayId),
                                          SpecialDaysWorkTimeUntil(cfg, specialDayId));
            ranges = 1;
        } else {
            // Set new price for the normal day: do not use a floating-point type
            // for the price, rather compute with integers. Only at the very end of
            // the computation the price is divided by durationUnit.
            price = weekDaysPrice;
            durationUnit = weekDaysDurationUnit;
            price /= durationUnit;
            price = std::round(price * 1000.0) / 1000.0; // round to 3 decimals

            // If no working day found, skip it (epsecially Sundays!)
            if (cfg->WeekDaysWorktime.count(weekdayId) <= 0) {
         //     qDebug() << "No workday found, trying to find next available day";
                end = current;
                current.setTime(QTime()); // start at midnight on the next day
                continue;
            }

            using WTIterator = std::multimap<int, ATBWeekDaysWorktime>::const_iterator;
            std::pair<WTIterator, WTIterator> p = cfg->WeekDaysWorktime.equal_range(weekdayId);

            for (WTIterator itr = p.first; itr != p.second; ++itr) {
                worktime[ranges].setTimeRange(WeekDaysWorkTimeFrom(itr),
                                              WeekDaysWorkTimeUntil(itr));
                ranges += 1;
            }
        }

        QTime const &lastWorktimeTo = worktime[ranges-1].getTimeUntil();

        // find worktime range to start with
        int currentRange = 0;
        if (!isSpecialDay) {
            if (start != current) { // on next day
                current.setTime(worktime[currentRange].getTimeFrom());
            } else {
                // check if inputDate is located inside a valid worktime-range...
                if ((currentRange = findWorkTimeRange(current, worktime, ranges)) == -1) {
                    if (!prepaid && carryOverNotSet) {       // parking is not allowed
                        return Ticket(start, QDateTime(), durationMinutesNetto, 0,
                                      0, Ticket::s[INVALID_FROM_DATETIME]);
                    }
                    // find the next worktime-range (on the same day), and start from there
                    if ((currentRange = findNextWorkTimeRange(current, worktime, ranges)) == -1) {
                        end = current;
                        continue;
                    }
                    current.setTime(worktime[currentRange].getTimeFrom());
                }
            }
        }

        for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
            if (moneyLeft > 0) {
                QTime const &worktime_from = worktime[w].getTimeFrom();
                QTime const &worktime_to = worktime[w].getTimeUntil();

                if (totalTimeRanges) {
                    // durationMinutes are always meant as netto time and
                    // the time between worktime-ranges are free.
                    current.setTime(worktime_from);
                }

                if (price == 0) {
                    // inputDate = inputDate.addDays(1);
                    // inputDate.setTime(worktime_from);
                    end = current;
                    current.setTime(QTime());
                    continue;
                }

                if (current.time() == worktime_to) {
                    end = current;
                    current.setTime(QTime());
                    continue;
                }

                // Check prepaid
                if (!prepaid) {
                    if ((current.time() < worktime_from) || (current.time() > worktime_to)) {
                        qDebug() << "[STOP] * Ticket is not valid * ";
                        return Ticket();
                    }
                } else {
                    qDebug() << "* PREPAID MODE ACTIVE *";
                    if (current.time() < worktime_from) {
                        current.setTime(worktime_from);
                        end = current;
                    } else if(current.time() > lastWorktimeTo) {
                        qDebug() << " *** PREPAID *** Current time is past the time range end, searching for next available day";
                        end = current;
                        current.setTime(QTime());
                        continue;
                    }
                }

                while(moneyLeft >= price) {
                    // Check for active year period
                    if (!IsYearPeriodActive(cfg, current)) {
                        return Ticket();
                    }
                    if(durationMinutesNetto > maxParkingTimeMinutes) {
                        durationMinutesNetto = maxParkingTimeMinutes;
                        break;
                    }
                    if(current.time() >= lastWorktimeTo) {
                        // Go to next day if minutes not spent
                        if (carryOverNotSet) {
                            // no carry_over, so stop computation
                            break;
                        }
                        current.setTime(QTime());
                        break; // stop while, and continue in outer loop
                    } else {
                        if(current.time() < worktime_to) {
                            // Increment input date minutes for each monetary unit
                            durationMinutesNetto +=1;
                            moneyLeft -= price;
                            moneyLeft = std::round(moneyLeft * 1000.0) / 1000.0;
                            current = current.addSecs(60);
                            end = current;
                        } else break;
                    }
                } // while(durationMinutes > 0) {
            } // if (durationMinutes > 0) {
        } // for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
    } // for (current = start; durationMinutes > 0; current = current.addDays(1)) {

    int durationMinutesBrutto =  start.secsTo(end) / 60;

    //qCritical() << "start" << start.toString(Qt::ISODate) << "end"
    //            << end.toString(Qt::ISODate) << durationMinutesBrutto;

    return
        Ticket(start, end, durationMinutesNetto, durationMinutesBrutto,
               cost, Ticket::s[VALID]);
}

QList<int> Calculator::GetTimeSteps(Configuration *cfg) const {
    if (m_timeSteps.size() > 0) {
        //qCritical() << __PRETTY_FUNCTION__ << "timeSteps:" << m_timeSteps;
        return m_timeSteps;
    }

    QDateTime start = QDateTime::currentDateTime();
    start.setTime(QTime(start.time().hour(), start.time().minute(), 0));

    int const pop_id = cfg->getPaymentOptions().pop_id;
    int const pop_carry_over = cfg->getPaymentOptions().pop_carry_over;
    int const pop_time_step_config = cfg->getPaymentOptions().pop_time_step_config;

    qCritical() << __PRETTY_FUNCTION__ << "             start parking time:" << start.toString(Qt::ISODate);
    qCritical() << __PRETTY_FUNCTION__ << "              payment option id:" << pop_id;
    qCritical() << __PRETTY_FUNCTION__ << "      payment option carry over:" << pop_carry_over;

    if (pop_time_step_config == (int)ATBTimeStepConfig::TimeStepConfig::DYNAMIC) {
        //qCritical() << __PRETTY_FUNCTION__ << "payment option time step config:" << "TimeStepConfig::DYNAMIC";

        uint16_t timeStepCompensation = 0;

        if (pop_carry_over) {
            int const pop_carry_over_time_range_id = cfg->getPaymentOptions().pop_carry_over_time_range_id;
            QTime const carryOverTimeRangeFrom = cfg->TimeRange.find(pop_carry_over_time_range_id)->second.time_range_from;
            QTime const carryOverTimeRangeTo = cfg->TimeRange.find(pop_carry_over_time_range_id)->second.time_range_to;

            if (carryOverTimeRangeFrom.secsTo(carryOverTimeRangeTo) <= 60) { // carry over time point, usually 00:00:00
                if (carryOverTimeRangeFrom == QTime(0, 0, 0)) {
                    for (auto[itr, rangeEnd] = cfg->PaymentRate.equal_range(pop_id); itr != rangeEnd; ++itr) {
                        int const durationId = itr->second.pra_payment_unit_id;
                        auto search = cfg->Duration.find(durationId);
                        if (search != cfg->Duration.end()) {
                            ATBDuration duration = search->second;
                            if (durationId == 1) {
                                QDateTime carryOver = start;
                                carryOver = carryOver.addDays(1);
                                carryOver.setTime(QTime(0, 0, 0));

                                int const timeStep = std::ceil(start.secsTo(carryOver) / 60.0);
                                if (timeStep < duration.pun_duration_min || timeStep > duration.pun_duration_max) {
                                    qCritical()
                                        << QString("ERROR timeStep (%1) < durationMin (%2) || timeStep (%3)) > durationMax (%4)")
                                            .arg(timeStep).arg(duration.pun_duration_min)
                                            .arg(timeStep).arg(duration.pun_duration_max);
                                    break;
                                }
                                qCritical() << __PRETTY_FUNCTION__ << "configured minimal parking time:" << cfg->getPaymentOptions().pop_min_time;

                                // set dynamic minimal parking time
                                cfg->getPaymentOptions().pop_min_time = timeStep;

                                qCritical() << __PRETTY_FUNCTION__ << "  computed minimal parking time:" << cfg->getPaymentOptions().pop_min_time;

                                duration.pun_duration = timeStep;
                                timeStepCompensation = duration.pun_duration_max - duration.pun_duration;
                                m_timeSteps << duration.pun_duration;
                            } else {
                                duration.pun_duration = duration.pun_duration_max - timeStepCompensation;
                                m_timeSteps << duration.pun_duration;;
                            }

                            cfg->Duration.erase(search);
                            cfg->Duration.insert(pair<int, ATBDuration>(duration.pun_id, duration));

                        } else { // if (search != cfg->Duration.end()) {
                           // TODO
                        }
                    }
                } else { // if (carryOverTimeRangeFrom == QTime(0, 0, 0)) {
                    // TODO
                }
            } else { // if (carryOverTimeRangeFrom == carryOverTimeRangeTo) {
                // TODO
            }
        } else { // if (pop_carry_over) {
            // TODO
        }
    } else {
        qCritical() << __PRETTY_FUNCTION__ << "payment option time step config:" << "TimeStepConfig::STATIC";

        for (auto[itr, rangeEnd] = cfg->PaymentRate.equal_range(pop_id); itr != rangeEnd; ++itr)
        {
            int const durationId = itr->second.pra_payment_unit_id;
            int const durationUnit = cfg->Duration.find(durationId)->second.pun_duration;
            m_timeSteps << durationUnit;
        }
    }

    Critical() << __PRETTY_FUNCTION__ << "NEW timeSteps:" << m_timeSteps;

    return m_timeSteps;
}

uint32_t Calculator::GetPriceForTimeStep(Configuration *cfg, int timeStep) const {

    int const pop_id = cfg->getPaymentOptions().pop_id;

    for (auto[itr, rangeEnd] = cfg->PaymentRate.equal_range(pop_id); itr != rangeEnd; ++itr)
    {
        int const payment_unit_id = itr->second.pra_payment_unit_id;
        int const pun_id = cfg->Duration.find(payment_unit_id)->second.pun_id;

        Q_ASSERT(pun_id == payment_unit_id);

        int const pun_duration = cfg->Duration.find(payment_unit_id)->second.pun_duration;
        if (timeStep == pun_duration) {
            return (uint32_t)(itr->second.pra_price);
        }
    }

    return 0;
}

uint32_t Calculator::GetDurationForPrice(Configuration *cfg, int price) const {
    int const pop_id = cfg->getPaymentOptions().pop_id;

    uint32_t duration = 0;

    for (auto[itr, rangeEnd] = cfg->PaymentRate.equal_range(pop_id); itr != rangeEnd; ++itr)
    {
        int const durationId = itr->second.pra_payment_unit_id;
        int const pra_price = itr->second.pra_price;

        uint32_t const durationUnit = cfg->Duration.find(durationId)->second.pun_duration;

        if (pra_price == price) {
            return durationUnit;
        }

        if (pra_price < price) {
            duration = durationUnit;
        }
    }

    return duration;
}