//
// PackageCompatibilityChecker.cs
//
// Author:
//       Matt Ward <matt.ward@xamarin.com>
//
// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Versioning;
using ICSharpCode.PackageManagement;
using MonoDevelop.Ide;
using NuGet;

namespace MonoDevelop.PackageManagement
{
	public class PackageCompatibilityChecker
	{
		IPackageManagementSolution solution;
		IRegisteredPackageRepositories registeredRepositories;
		List<IPackage> packagesRequiringReinstallation = new List<IPackage> ();
		PackageReferenceFile packageReferenceFile;
		List<PackageReference> packageReferences;
		ProjectPackagesCompatibilityReport compatibilityReport;

		public PackageCompatibilityChecker (
			IPackageManagementSolution solution,
			IRegisteredPackageRepositories registeredRepositories)
		{
			this.solution = solution;
			this.registeredRepositories = registeredRepositories;
		}

		public string PackageReferenceFileName {
			get { return packageReferenceFile.FullPath; }
		}

		public void CheckProjectPackages (IDotNetProject project)
		{
			IPackageManagementProject packageManagementProject = solution.GetProject (registeredRepositories.ActiveRepository, project);

			packageReferenceFile = CreatePackageReferenceFile (project.GetPackagesConfigFilePath ());
			packageReferences = packageReferenceFile.GetPackageReferences ().ToList ();

			compatibilityReport = new ProjectPackagesCompatibilityReport (packageManagementProject.TargetFramework);

			foreach (PackageReference packageReference in packageReferences) {
				IPackage package = packageManagementProject.FindPackage (packageReference.Id);
				if (package != null) {
					if (PackageNeedsReinstall (project, package, packageReference.TargetFramework)) {
						packagesRequiringReinstallation.Add (package);
					}
				}
			}
		}

		protected virtual PackageReferenceFile CreatePackageReferenceFile (string fileName)
		{
			return new PackageReferenceFile (fileName);
		}

		bool PackageNeedsReinstall (IDotNetProject project, IPackage package, FrameworkName packageTargetFramework)
		{
			var compatibility = new PackageCompatibility (project, package, packageTargetFramework);
			compatibility.CheckCompatibility ();
			compatibilityReport.Add (compatibility);

			return compatibility.ShouldReinstallPackage;
		}

		public bool AnyIncompatiblePackages ()
		{
			return compatibilityReport.AnyIncompatiblePackages ();
		}

		public bool AnyPackagesRequireReinstallation ()
		{
			return packagesRequiringReinstallation.Any ();
		}

		public void MarkPackagesForReinstallation ()
		{
			GuiDispatch (() => {
				foreach (PackageReference packageReference in packageReferences) {
					bool reinstall = packagesRequiringReinstallation.Any (package => package.Id == packageReference.Id);
					packageReferenceFile.MarkEntryForReinstallation (
						packageReference.Id,
						packageReference.Version,
						packageReference.TargetFramework,
						reinstall);
				}
			});
		}

		public bool PackagesMarkedForReinstallationInPackageReferenceFile ()
		{
			return packageReferences.Any (packageReference => packageReference.RequireReinstallation);
		}

		protected virtual void GuiDispatch (MessageHandler handler)
		{
			DispatchService.GuiDispatch (handler);
		}

		public void GenerateReport (TextWriter writer)
		{
			compatibilityReport.GenerateReport (writer);
		}
	}
}

