using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BuzzGUI.Interfaces;

namespace BuzzGUI.Common.InterfaceExtensions
{
	public static class AttributeExtensions
	{
		const int MaxAttributeRange = 256;
		const int PresentableNumber = 40;

		public static bool IsProbablyAPeertuneAttribute(this IAttribute a)
		{
			return a.MinValue == 0 && a.DefValue == 12000 && a.MaxValue == 24000;
		}

		public static IEnumerable<int> GetPresentableNumberOfValues(this IAttribute a)
		{
			if (a.IsProbablyAPeertuneAttribute())
			{
				return LinqExtensions.RangeIncludingEnd(11000, 13000, 50);
			}
			else if (a.MaxValue - a.MinValue > MaxAttributeRange)
			{
				return LinqExtensions.RangeExcludingEnd(a.MinValue, a.MaxValue, (double)(a.MaxValue - a.MinValue) / PresentableNumber)
					.Select(v => (int)Math.Round(v))
					.Concat(Enumerable.Repeat(a.DefValue, 1))
					.Concat(Enumerable.Repeat(a.MaxValue, 1))
					.Distinct().OrderBy(v => v);
			}
			else
			{
				return Enumerable.Range(a.MinValue, a.MaxValue - a.MinValue + 1);
			}

		}
	}
}