NepaliCalendarToolkit

using NepaliCalendarToolkit;

// Convert AD to BS
DateOnly adDate = new DateOnly(2024, 1, 15);
NepaliDate bsDate = NepaliCalendar.ConvertToNepali(adDate);
Console.WriteLine(bsDate); // Output: 2080/10/01

// Convert BS to AD
NepaliDate bsDate = new NepaliDate(2080, 10, 1);
DateOnly adDate = NepaliCalendar.ConvertToEnglish(bsDate);
Console.WriteLine(adDate); // Output: 1/15/2024

// Create a Nepali date
NepaliDate date = new NepaliDate(2080, 10, 15);

// Access properties
Console.WriteLine($"Year: {date.Year}");    // 2080
Console.WriteLine($"Month: {date.Month}");  // 10
Console.WriteLine($"Day: {date.Day}");      // 15

// Format output
Console.WriteLine(date.ToString("yyyy/MM/dd")); // 2080/10/15
Console.WriteLine(date.ToString("MMMM dd, yyyy")); // Magh 15, 2080

var calendar = new NepaliCalendarService();

// Get working days between two dates
var start = new NepaliDate(2080, 1, 1);
var end = new NepaliDate(2080, 1, 31);
int workingDays = calendar.GetWorkingDays(start, end);

// Configure custom weekend days (default: Saturday only)
var options = new NepaliCalendarOptions
{
    WeekendDays = new[] { DayOfWeek.Saturday }
};

var calendar = new NepaliCalendarService(options);

// For Middle East countries where Friday-Saturday are weekends
var options = new NepaliCalendarOptions
{
    WeekendDays = new[] { DayOfWeek.Friday, DayOfWeek.Saturday }
};

var calendar = new NepaliCalendarService();

// Get all holidays for a year
var holidays = calendar.GetHolidays(2080);

foreach (var holiday in holidays)
{
    Console.WriteLine($"{holiday.Date}: {holiday.Name}");
}

// Check if a date is a holiday
var date = new NepaliDate(2080, 9, 15); // Dashain
bool isHoliday = calendar.IsHoliday(date);

var options = new NepaliCalendarOptions();
options.CustomHolidays.Add(new Holiday
{
    Date = new NepaliDate(2080, 5, 1),
    Name = "Company Anniversary",
    IsRecurring = true
});

var calendar = new NepaliCalendarService(options);

var calendar = new NepaliCalendarService();

// Get start and end dates of a month
var range = calendar.GetMonthRange(2080, 10); // Magh 2080
Console.WriteLine($"Start: {range.Start}");
Console.WriteLine($"End: {range.End}");
Console.WriteLine($"Days: {range.TotalDays}");

// Nepali fiscal year starts from Shrawan (month 4)
var fiscalYear = calendar.GetFiscalYearRange(2080);
Console.WriteLine($"FY 2080/81: {fiscalYear.Start} to {fiscalYear.End}");

// Get quarter range
var q1 = calendar.GetQuarterRange(2080, 1);
var q2 = calendar.GetQuarterRange(2080, 2);
var q3 = calendar.GetQuarterRange(2080, 3);
var q4 = calendar.GetQuarterRange(2080, 4);

var calendar = new NepaliCalendarService();

// Check if date is valid
bool isValid = calendar.IsValidDate(2080, 10, 32);
// Returns false - Magh doesn't have 32 days

// Get days in month
int days = calendar.GetDaysInMonth(2080, 2); // Jestha
// Returns 31 or 32 depending on the year

var date = new NepaliDate(2080, 10, 15);

// Add days
var futureDate = date.AddDays(10);

// Add months
var futureMonth = date.AddMonths(2);

// Add years
var futureYear = date.AddYears(1);

var birthDate = new NepaliDate(2040, 5, 15);
var age = NepaliCalendar.GetAge(birthDate);
Console.WriteLine($"Age: {age.Years} years, {age.Months} months, {age.Days} days");

public class LeaveCalculator
{
    private readonly NepaliCalendarService _calendar;

    public LeaveCalculator()
    {
        _calendar = new NepaliCalendarService();
    }

    public int CalculateLeaveDays(NepaliDate start, NepaliDate end)
    {
        return _calendar.GetWorkingDays(start, end);
    }

    public NepaliDate GetReturnDate(NepaliDate start, int leaveDays)
    {
        var current = start;
        int countedDays = 0;

        while (countedDays < leaveDays)
        {
            current = current.AddDays(1);

            if (!_calendar.IsHoliday(current) &&
                !_calendar.IsWeekend(current))
            {
                countedDays++;
            }
        }

        return current;
    }
}