using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection.PortableExecutable;
using System.Runtime.CompilerServices;
using System.Xml.Linq;
using ICSharpCode.Decompiler.CSharp;
using ICSharpCode.Decompiler.CSharp.OutputVisitor;
using ICSharpCode.Decompiler.DebugInfo;
using ICSharpCode.Decompiler.Metadata;
using ICSharpCode.Decompiler.Tests.Helpers;
using ICSharpCode.Decompiler.TypeSystem;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.DiaSymReader.Tools;
using NUnit.Framework;

namespace ICSharpCode.Decompiler.Tests
{
	[TestFixture]
	public class PdbGenerationTestRunner
	{
		static readonly string TestCasePath = Tester.TestCasePath + "/PdbGen";

		[Test, Ignore("Needs adjustments in generator")]
		public void HelloWorld()
		{
			TestGeneratePdb();
		}

		private void TestGeneratePdb([CallerMemberName] string testName = null)
		{
			const PdbToXmlOptions options = PdbToXmlOptions.IncludeEmbeddedSources | PdbToXmlOptions.ThrowOnError | PdbToXmlOptions.IncludeTokens | PdbToXmlOptions.ResolveTokens | PdbToXmlOptions.IncludeMethodSpans;

			string xmlFile = Path.Combine(TestCasePath, testName + ".xml");
			string xmlContent = File.ReadAllText(xmlFile);
			XDocument document = XDocument.Parse(xmlContent);
			var files = document.Descendants("file").ToDictionary(f => f.Attribute("name").Value, f => f.Value);
			Tester.CompileCSharpWithPdb(Path.Combine(TestCasePath, testName + ".expected"), files, options);

			string peFileName = Path.Combine(TestCasePath, testName + ".expected.dll");
			string pdbFileName = Path.Combine(TestCasePath, testName + ".expected.pdb");
			var moduleDefinition = new PEFile(peFileName);
			var resolver = new UniversalAssemblyResolver(peFileName, false, moduleDefinition.Reader.DetectTargetFrameworkId(), PEStreamOptions.PrefetchEntireImage);
			var decompiler = new CSharpDecompiler(moduleDefinition, resolver, new DecompilerSettings());
			using (FileStream pdbStream = File.Open(Path.Combine(TestCasePath, testName + ".pdb"), FileMode.OpenOrCreate, FileAccess.ReadWrite)) {
				PortablePdbWriter.WritePdb(moduleDefinition, decompiler, new DecompilerSettings(), pdbStream);
				pdbStream.Position = 0;
				string resultFile = PdbToXmlConverter.ToXml(pdbStream, moduleDefinition.Reader.GetEntireImage().GetContent().ToArray(), options);
				Assert.AreEqual(xmlContent, resultFile);
			}
		}
	}
}