using System;
using System.Linq;
using LeafWeb.Core.Entities;
using LeafWeb.Core.Utility;
using Moq;
using NUnit.Framework;

namespace LeafWeb.Core.Tests.Utility
{
	[TestFixture]
	public class TimeInProgressEstimaterTests
	{
		[Test]
		public void EstimateTest()
		{
			Func<int, int> scaleFunc = i => i*i;

			var obervations = 
				from i in Enumerable.Range(1, 10)
				let time = scaleFunc(i)
				select Mock.Of<ILeafInput>(li =>
					li.InputFiles.Count == i &&
					li.TimeInProgress == TimeSpan.FromMinutes(time));
			
			var estimater = new TimeInProgressEstimater(obervations.ToArray());

			Action<int> est = i =>
			{
				var query = Mock.Of<ILeafInput>(li => li.InputFiles.Count == i);
				var estimate = estimater.EstimateTimeInProgress(query);
				Console.WriteLine($"{i} => {estimate}.  {TimeSpan.FromMinutes(scaleFunc(i))}");
			};

			for (var i = 1; i < 30; i++)
				est(i);
		}
	}
}