/*------------*/
/* Vehicle.cs */
/*------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TollFeeCalculator
{
    public interface Vehicle
    {
        String GetVehicleType();
    }
}

/*--------------*/
/* Motorbike.cs */
/*--------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TollFeeCalculator
{
    public class Motorbike : Vehicle
    {
        public string GetVehicleType()
        {
            return "Motorbike";
        }
    }
}

/*--------*/
/* Car.cs */
/*--------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TollFeeCalculator
{
    public class Car : Vehicle
    {
        public String GetVehicleType()
        {
            return "Car";
        }
    }
}

/*-------------------*/
/* TollCalculator.cs */
/*-------------------*/
using System;
using System.Globalization;
using TollFeeCalculator;

public class TollCalculator
{
    /* Calculate the total toll fee for one day
     * @param vehicle - the vehicle
     * @param dates   - date and time of all passes on one day
     * @return - the total toll fee for that day
     */

    public int GetTollFee(Vehicle vehicle, DateTime[] dates)
    {
        DateTime intervalStart = dates[0];
        int totalFee = 0;
        foreach (DateTime date in dates)
        {
            int nextFee = GetTollFee(date, vehicle);
            int tempFee = GetTollFee(intervalStart, vehicle);

            long diffInMillies = date.Millisecond - intervalStart.Millisecond;
            long minutes = diffInMillies/1000/60;

            if (minutes <= 60)
            {
                if (totalFee > 0) totalFee -= tempFee;
                if (nextFee >= tempFee) tempFee = nextFee;
                totalFee += tempFee;
            }
            else
            {
                totalFee += nextFee;
            }
        }
        if (totalFee > 60) totalFee = 60;
        return totalFee;
    }

    private bool IsTollFreeVehicle(Vehicle vehicle)
    {
        if (vehicle == null) return false;
        String vehicleType = vehicle.GetVehicleType();
        return vehicleType.Equals(TollFreeVehicles.Motorbike.ToString()) ||
               vehicleType.Equals(TollFreeVehicles.Tractor.ToString()) ||
               vehicleType.Equals(TollFreeVehicles.Emergency.ToString()) ||
               vehicleType.Equals(TollFreeVehicles.Diplomat.ToString()) ||
               vehicleType.Equals(TollFreeVehicles.Foreign.ToString()) ||
               vehicleType.Equals(TollFreeVehicles.Military.ToString());
    }

    public int GetTollFee(DateTime date, Vehicle vehicle)
    {
        if (IsTollFreeDate(date) || IsTollFreeVehicle(vehicle)) return 0;

        int hour = date.Hour;
        int minute = date.Minute;

        if (hour == 6 && minute >= 0 && minute <= 29) return 8;
        else if (hour == 6 && minute >= 30 && minute <= 59) return 13;
        else if (hour == 7 && minute >= 0 && minute <= 59) return 18;
        else if (hour == 8 && minute >= 0 && minute <= 29) return 13;
        else if (hour >= 8 && hour <= 14 && minute >= 30 && minute <= 59) return 8;
        else if (hour == 15 && minute >= 0 && minute <= 29) return 13;
        else if (hour == 15 && minute >= 0 || hour == 16 && minute <= 59) return 18;
        else if (hour == 17 && minute >= 0 && minute <= 59) return 13;
        else if (hour == 18 && minute >= 0 && minute <= 29) return 8;
        else return 0;
    }

    private Boolean IsTollFreeDate(DateTime date)
    {
        int year = date.Year;
        int month = date.Month;
        int day = date.Day;

        if (date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek == DayOfWeek.Sunday) return true;

        if (year == 2013)
        {
            if (month == 1 && day == 1 ||
                month == 3 && (day == 28 || day == 29) ||
                month == 4 && (day == 1 || day == 30) ||
                month == 5 && (day == 1 || day == 8 || day == 9) ||
                month == 6 && (day == 5 || day == 6 || day == 21) ||
                month == 7 ||
                month == 11 && day == 1 ||
                month == 12 && (day == 24 || day == 25 || day == 26 || day == 31))
            {
                return true;
            }
        }
        return false;
    }

    private enum TollFreeVehicles
    {
        Motorbike = 0,
        Tractor = 1,
        Emergency = 2,
        Diplomat = 3,
        Foreign = 4,
        Military = 5
    }
}