using System.Reflection;

using Autodesk.Revit.UI;

using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.CSharp.Scripting.Hosting;
using Microsoft.CodeAnalysis.Scripting;

namespace Szmedi.AIScriptRunner.RvScript
{
    public class ScriptRunnerHandler : IExternalEventHandler
    {
        public string ScriptText { get; internal set; }

        public string ScriptResult { get; private set; }

        public RoslynEditorViewModel RoslynEditorViewModel { get; set; }
        public IProgress<string> Progress { get; set; }

        public void Execute(UIApplication app)
        {
            var assembliesToRef = new List<Assembly>
            {
                typeof(object).Assembly, //mscorlib
                typeof(Autodesk.Revit.UI.UIApplication).Assembly, // Microsoft.CodeAnalysis.Workspaces
                typeof(Autodesk.Revit.DB.Document).Assembly, // Microsoft.Build
            };

            var namespaces = new List<string>
            {
                "Autodesk.Revit.UI",
                "Autodesk.Revit.DB",
                "Autodesk.Revit.DB.Structure",
                "System",
                "Autodesk.Revit.DB.Mechanical",
                "System.Collections.Generic",
                "Autodesk.Revit.DB.Plumbing",
                "Autodesk.Revit.DB.Electrical",
                "System.IO",
                "System.Linq"
            };

            ScriptGlobals globals = new ScriptGlobals(Progress) { doc = app.ActiveUIDocument.Document, uidoc = app.ActiveUIDocument };

            var options = ScriptOptions.Default.AddReferences(assembliesToRef).WithImports(namespaces);
            //AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;

            try
            {
                object result = CSharpScript.EvaluateAsync<object>(ScriptText, options, globals).Result;
                if (!(result is null))
                    RoslynEditorViewModel.Result += CSharpObjectFormatter.Instance.FormatObject(result) + Environment.NewLine;
                RoslynEditorViewModel.IsRunning = System.Windows.Visibility.Collapsed;
            }
            catch (AggregateException AggEx)
            {
                AggEx.Handle(ex =>
                                {
                                    RoslynEditorViewModel.Result += CSharpObjectFormatter.Instance.FormatObject(ex) + Environment.NewLine;
                                    return true;
                                }
                            );
                RoslynEditorViewModel.IsRunning = System.Windows.Visibility.Collapsed;
            }
            catch (System.Exception ex)
            {
                RoslynEditorViewModel.Result += CSharpObjectFormatter.Instance.FormatObject(ex) + Environment.NewLine;
                RoslynEditorViewModel.IsRunning = System.Windows.Visibility.Collapsed;
            }
            finally
            {
                RoslynEditorViewModel.IsRunning = System.Windows.Visibility.Collapsed;
                //AppDomain.CurrentDomain.AssemblyResolve -= CurrentDomain_AssemblyResolve;
            }
        }
        //private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        //{
        //    if (args.Name.StartsWith("System.Runtime.CompilerServices.Unsafe"))
        //    {
        //        string services = Path.Combine(GlobalVariables.DirAssembly, "System.Runtime.CompilerServices.Unsafe.dll");
        //        if (File.Exists(services))
        //        {
        //            return Assembly.LoadFrom(services);
        //        }
        //    }
        //    return null;
        //}
        public string GetName()
        {
            return "执行脚本";
        }
    }
}