using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.DI;
using Tango.Core.Helpers;
using Tango.FSE.Common;
using Tango.FSE.Common.FSEApplication;
using Tango.FSE.Procedures.Helpers;
using Tango.Scripting.Basic;
using Tango.SharedUI.Components;

namespace Tango.FSE.Procedures.Dialogs
{
    public class AddReferenceAssemblyViewVM : FSEDialogViewVM
    {
        private List<ReferenceAssembly> _existing;

        [TangoInject]
        private IFSEApplicationManager ApplicationManager { get; set; }

        public SelectedObjectCollection<ReferenceAssembly> ReferenceAssemblies { get; set; }

        public AddReferenceAssemblyViewVM(List<ReferenceAssembly> existing)
        {
            _existing = existing;
            OKText = "DONE";
            TangoIOC.Default.Inject(this);
        }

        public override void OnShow()
        {
            base.OnShow();

            Task.Factory.StartNew(() => 
            {
                System.Threading.Thread.Sleep(200);
                List<ReferenceAssembly> source = new List<ReferenceAssembly>();

                var startPath = ApplicationManager.StartPath;

                foreach (var file in Directory.GetFiles(startPath, "*.dll"))
                {
                    if (Path.GetFileName(file).StartsWith("Tango"))
                    {
                        source.Add(ReferenceAssembly.FromFile(Path.GetFileName(file)));
                    }
                }

                String dotNetPath = ReferenceAssembliesHelper.GetDotNetDeveloperPackFolder();

                foreach (var file in Directory.GetFiles(dotNetPath, "*.dll"))
                {
                    source.Add(ReferenceAssembly.FromFile(Path.GetFileName(file)));
                }

                source = source.DistinctBy(x => x.Name).ToList();

                List<ReferenceAssembly> existingReferences = new List<ReferenceAssembly>();

                foreach (var asm in source)
                {
                    if (_existing.Exists(x => x.Name == asm.Name))
                    {
                        existingReferences.Add(asm);
                    }
                }

                ReferenceAssemblies = new SelectedObjectCollection<ReferenceAssembly>(source.ToObservableCollection(), existingReferences.ToObservableCollection());

                RaisePropertyChanged(nameof(ReferenceAssemblies));
            });
        }
    }
}