// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using ICSharpCode.Core;
using ICSharpCode.Core.Tests.Utils;
using NUnit.Framework;

namespace ICSharpCode.Core.Tests.AddInTreeTests
{
	[TestFixture]
	public class RuntimeLoadAssemblyTests
	{
		[Test]
		public void AssemblyLoadCalledWhenAssemblyNameStartsWithColon()
		{
			DerivedRuntime runtime = new DerivedRuntime(":ICSharpCode.SharpDevelop", String.Empty);
			runtime.Load();
			Assert.AreEqual("ICSharpCode.SharpDevelop", runtime.AssemblyNamePassedToLoadAssembly);
		}
		
		[Test]
		public void RuntimeLoadedAssemblyMatchesAssemblyReturnedFromLoadAssemblyMethod()
		{
			DerivedRuntime runtime = new DerivedRuntime(":ICSharpCode.SharpDevelop", String.Empty);
			runtime.AssemblyNames.Add("ICSharpCode.SharpDevelop", typeof(string).Assembly);
			Assembly loadedAssembly = runtime.LoadedAssembly;
			
			string expectedLoadedAssemblyName = "CommonLanguageRuntimeLibrary";
			Assert.AreEqual(expectedLoadedAssemblyName, loadedAssembly.ManifestModule.ToString());
		}
		
		[Test]
		public void AssemblyLoadCalledWhenAssemblyNameDoesNotStartWithColonOrDollar()
		{
			string hintPath = @"D:\SharpDevelop\AddIns\FormsDesigner";
			DerivedRuntime runtime = new DerivedRuntime("FormsDesigner.dll", hintPath);
			runtime.Load();
			
			string expectedFileName = @"D:\SharpDevelop\AddIns\FormsDesigner\FormsDesigner.dll";
			Assert.AreEqual(expectedFileName, runtime.AssemblyFileNamePassedToLoadAssemblyFrom);
		}
		
		[Test]
		public void RuntimeLoadedAssemblyMatchesAssemblyReturnedFromLoadAssemblyFromMethod()
		{
			DerivedRuntime runtime = new DerivedRuntime("MyAddIn.dll", @"d:\projects");
			runtime.AssemblyFileNames.Add(@"MyAddIn.dll", typeof(string).Assembly);
			Assembly loadedAssembly = runtime.LoadedAssembly;
			
			string expectedLoadedAssemblyName = "CommonLanguageRuntimeLibrary";
			Assert.AreEqual(expectedLoadedAssemblyName, loadedAssembly.ManifestModule.ToString());
		}
		
		[Test]
		public void AssemblyLoadFromCalledWhenAssemblyNameStartsWithDollar()
		{
			List<AddIn> addIns = GetAddInsList();
			DerivedRuntime runtime = new DerivedRuntime("$ICSharpCode.FormsDesigner/FormsDesigner.dll", String.Empty, addIns);
			runtime.Load();
			Assert.AreEqual(@"D:\SharpDevelop\AddIns\FormsDesigner\FormsDesigner.dll", runtime.AssemblyFileNamePassedToLoadAssemblyFrom);
		}
		
		List<AddIn> GetAddInsList()
		{
			AddIn formsDesignerAddIn = AddIn.Load(new StringReader(GetFormsDesignerAddInXml()));
			formsDesignerAddIn.FileName = @"D:\SharpDevelop\AddIns\FormsDesigner\FormsDesigner.addin";
			formsDesignerAddIn.Enabled = true;
			
			List<AddIn> addIns = new List<AddIn>();
			addIns.Add(formsDesignerAddIn);
			return addIns;
		}
		
		string GetFormsDesignerAddInXml()
		{
			return 
				"<AddIn name        = \"Forms Designer\"\r\n" +
				"       author      = \"Mike Krueger\"\r\n" +
				"       copyright   = \"prj:///doc/copyright.txt\"\r\n" +
				"       description = \"Windows Forms Designer\"\r\n" +
				"       addInManagerHidden = \"preinstalled\">\r\n" +
				"\r\n" +
				"    <Manifest>\r\n" +
				"        <Identity name = \"ICSharpCode.FormsDesigner\"/>\r\n" +
				"    </Manifest>\r\n" +
				"\r\n" +
				"    <Runtime>\r\n" +
				"        <Import assembly = \"FormsDesigner.dll\"/>\r\n" +
				"        <Import assembly = \":ICSharpCode.SharpDevelop\"/>\r\n" +
				"    </Runtime>\r\n" +
				"</AddIn>";
		}
		
		[Test]
		public void CoreExceptionErrorMessageShownAssemblyNameStartsWithDollarButHasNoForwardSlashCharacter()
		{
			List<AddIn> addIns = GetAddInsList();
			DerivedRuntime runtime = new DerivedRuntime("$ICSharpCode.FormsDesigner.dll", String.Empty, addIns);
			CoreException ex = Assert.Throws<CoreException>(delegate { runtime.Load(); });
			Assert.AreEqual("Expected '/' in path beginning with '$'!", ex.Message);
		}
		
		[Test]
		public void ErrorMessageShownWhenAddInReferenceCannotBeFound()
		{
			List<AddIn> addIns = new List<AddIn>();
			DerivedRuntime runtime = new DerivedRuntime("$UnknownAddIn/Unknown.dll", String.Empty, addIns);
			runtime.Load();
			
			string expectedErrorMessageStart = 
				"The addin '$UnknownAddIn/Unknown.dll' could not be loaded:\n" +
				"System.IO.FileNotFoundException: Could not find referenced AddIn UnknownAddIn";
			string errorMessage = runtime.ErrorMessageDisplayed;
			Assert.IsTrue(errorMessage.StartsWith(expectedErrorMessageStart), errorMessage);
		}
		
		[Test]
		public void ErrorMessageShownWhenLoadAssemblyFromThrowsFileLoadException()
		{
			List<AddIn> addIns = new List<AddIn>();
			DerivedRuntime runtime = new DerivedRuntime("Missing.dll", String.Empty, addIns);
			FileLoadException ex = new FileLoadException("Test");
			runtime.LoadAssemblyFromExceptionToThrow = ex;
			runtime.Load();
			
			string expectedErrorMessageStart = 
				"The addin 'Missing.dll' could not be loaded:\n" +
				"System.IO.FileLoadException: Test";
			string errorMessage = runtime.ErrorMessageDisplayed;
			Assert.IsTrue(errorMessage.StartsWith(expectedErrorMessageStart), errorMessage);
		}
	}
}