using System;
using System.IO;
using System.Reflection;
using NUnit.Framework;
using Umbraco.Core;

namespace Umbraco.Tests
{
	[TestFixture]
	public class HashCodeCombinerTests : PartialTrust.AbstractPartialTrustFixture<HashCodeCombinerTests>
	{

		private DirectoryInfo PrepareFolder()
		{
			var assDir = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory;
			var dir = Directory.CreateDirectory(Path.Combine(assDir.FullName, "HashCombiner", Guid.NewGuid().ToString("N")));
			foreach (var f in dir.GetFiles())
			{
				f.Delete();
			}
			return dir;
		}

		[Test]
		public void HashCombiner_Test_String()
		{
			var combiner1 = new HashCodeCombiner();
			combiner1.AddCaseInsensitiveString("Hello");

			var combiner2 = new HashCodeCombiner();
			combiner2.AddCaseInsensitiveString("hello");

			Assert.AreEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());

			combiner2.AddCaseInsensitiveString("world");

			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());
		}

		[Test]
		public void HashCombiner_Test_Int()
		{
			var combiner1 = new HashCodeCombiner();
			combiner1.AddInt(1234);

			var combiner2 = new HashCodeCombiner();
			combiner2.AddInt(1234);

			Assert.AreEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());

			combiner2.AddInt(1);

			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());
		}

		[Test]
		public void HashCombiner_Test_DateTime()
		{
			var dt = DateTime.Now;
			var combiner1 = new HashCodeCombiner();
			combiner1.AddDateTime(dt);

			var combiner2 = new HashCodeCombiner();
			combiner2.AddDateTime(dt);

			Assert.AreEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());

			combiner2.AddDateTime(DateTime.Now);

			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());
		}

		[Test]
		public void HashCombiner_Test_File()
		{
			var dir = PrepareFolder();
			var file1Path = Path.Combine(dir.FullName, "hastest1.txt");
			File.Delete(file1Path);
			using (var file1 = File.CreateText(Path.Combine(dir.FullName, "hastest1.txt")))
			{
				file1.WriteLine("hello");
			}
			var file2Path = Path.Combine(dir.FullName, "hastest2.txt");
			File.Delete(file2Path);
			using (var file2 = File.CreateText(Path.Combine(dir.FullName, "hastest2.txt")))
			{
				//even though files are the same, the dates are different
				file2.WriteLine("hello");
			}

			var combiner1 = new HashCodeCombiner();
			combiner1.AddFile(new FileInfo(file1Path));

			var combiner2 = new HashCodeCombiner();
			combiner2.AddFile(new FileInfo(file1Path));

			var combiner3 = new HashCodeCombiner();
			combiner3.AddFile(new FileInfo(file2Path));

			Assert.AreEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());
			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner3.GetCombinedHashCode());

			combiner2.AddFile(new FileInfo(file2Path));

			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());
		}

		[Test]
		public void HashCombiner_Test_Folder()
		{
			var dir = PrepareFolder();
			var file1Path = Path.Combine(dir.FullName, "hastest1.txt");
			File.Delete(file1Path);
			using (var file1 = File.CreateText(Path.Combine(dir.FullName, "hastest1.txt")))
			{
				file1.WriteLine("hello");
			}

			//first test the whole folder
			var combiner1 = new HashCodeCombiner();
			combiner1.AddFolder(dir);

			var combiner2 = new HashCodeCombiner();
			combiner2.AddFolder(dir);

			Assert.AreEqual(combiner1.GetCombinedHashCode(), combiner2.GetCombinedHashCode());

			//now add a file to the folder

			var file2Path = Path.Combine(dir.FullName, "hastest2.txt");
			File.Delete(file2Path);
			using (var file2 = File.CreateText(Path.Combine(dir.FullName, "hastest2.txt")))
			{
				//even though files are the same, the dates are different
				file2.WriteLine("hello");
			}

			var combiner3 = new HashCodeCombiner();
			combiner3.AddFolder(dir);

			Assert.AreNotEqual(combiner1.GetCombinedHashCode(), combiner3.GetCombinedHashCode());
		}

		public override void TestSetup()
		{
			
		}

		public override void TestTearDown()
		{
			
		}
	}
}
