namespace AZKiServer.Utilz;

public enum DateInterval
{
	Daily,
	Weekly,
	Monthly,
	Yearly,
	All,
}

public static class DateUtils
{
	public static TimeSpan ToUnixTime(this DateTime date)
	{
		return date - DateTime.UnixEpoch;
	}

	public static DateTime SnapToYear(this DateTime date)
	{
		return new DateTime(date.Year, 1, 1, 0, 0, 0, date.Kind);
	}

	public static DateTimeOffset SnapToYear(this DateTimeOffset date)
	{
		return new DateTimeOffset(date.Year, 1, 1, 0, 0, 0, date.Offset);
	}

	public static DateTime SnapToMonth(this DateTime date)
	{
		return new DateTime(date.Year, date.Month, 1, 0, 0, 0, date.Kind);
	}

	public static DateTimeOffset SnapToMonth(this DateTimeOffset date)
	{
		return new DateTimeOffset(date.Year, date.Month, 1, 0, 0, 0, date.Offset);
	}

	public static DateTime SnapToWeek(this DateTime date)
	{
		var d = new DateTime(date.Year, date.Month, date.Day, 0, 0, 0, date.Kind);
		if (date.DayOfWeek == DayOfWeek.Sunday)
			return d;
		else
			return d.AddDays(-(int)date.DayOfWeek);
	}

	public static DateTimeOffset SnapToWeek(this DateTimeOffset date)
	{
		var d = new DateTimeOffset(date.Year, date.Month, date.Day, 0, 0, 0, date.Offset);
		if (date.DayOfWeek == DayOfWeek.Sunday)
			return d;
		else
			return d.AddDays(-(int)date.DayOfWeek);
	}

	public static (DateTime from, DateTime to) ToInterval(this DateTime date, DateInterval internval)
	{
		return internval switch
		{
			DateInterval.Daily => (date, date.AddDays(1)),
			DateInterval.Weekly => (date, date.AddDays(7)),
			DateInterval.Monthly => (date, date.AddMonths(1)),
			DateInterval.Yearly => (date, date.AddYears(1)),
			DateInterval.All => (DateTime.MinValue, DateTime.MaxValue),
			_ => throw new InvalidOperationException(),
		};
	}

	public static (DateTimeOffset from, DateTimeOffset to) ToInterval(this DateTimeOffset date, DateInterval internval)
	{
		return internval switch
		{
			DateInterval.Daily => (date, date.AddDays(1)),
			DateInterval.Weekly => (date, date.AddDays(7)),
			DateInterval.Monthly => (date, date.AddMonths(1)),
			DateInterval.Yearly => (date, date.AddYears(1)),
			DateInterval.All => (DateTime.MinValue, DateTime.MaxValue),
			_ => throw new InvalidOperationException(),
		};
	}

	public static TimeSpan Days(this int days) => TimeSpan.FromDays(days);

	public static TimeSpan Days(this float days) => TimeSpan.FromDays(days);

	public static TimeSpan Hours(this int hours) => TimeSpan.FromHours(hours);

	public static TimeSpan Hours(this float hours) => TimeSpan.FromHours(hours);

	public static TimeSpan Minutes(this int minutes) => TimeSpan.FromMinutes(minutes);

	public static TimeSpan Minutes(this float minutes) => TimeSpan.FromMinutes(minutes);

	public static TimeSpan Seconds(this int seconds) => TimeSpan.FromSeconds(seconds);

	public static TimeSpan Seconds(this float seconds) => TimeSpan.FromSeconds(seconds);

	public static TimeSpan Miliseconds(this int miliseconds) => TimeSpan.FromMilliseconds(miliseconds);

	public static TimeSpan Miliseconds(this float miliseconds) => TimeSpan.FromMilliseconds(miliseconds);
}