using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Tango.Core.Commands;
using Tango.Scripting.Basic;
using Tango.SharedUI;

namespace Tango.Scripting.Test
{
    public class TestContext : IContext
    {

    }

    public class MainWindowVM : ViewModel
    {

        public RelayCommand AddScriptCommand { get; set; }
        public RelayCommand RunCommand { get; set; }

        private Project<TestContext> _project;
        public Project<TestContext> Project
        {
            get { return _project; }
            set { _project = value; RaisePropertyChangedAuto(); }
        }

        public MainWindowVM()
        {
            Project = Project<TestContext>.New("untitled");
            Project.Scripts.Add(Script.New("main.csx", Encoding.Default.GetString(Properties.Resources.template), true));
            AddScriptCommand = new RelayCommand(AddScriptFile);
            RunCommand = new RelayCommand(RunProject);
        }

        private void AddScriptFile()
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Filter = "CSharp Script|*.csx";
            if (dlg.ShowDialog().Value)
            {
                AddScript(dlg.FileName);
            }
        }

        private void AddScript(String file)
        {
            Project.Scripts.Add(Script.New(file));
        }

        private async void RunProject()
        {
            var session = await Project.Run(null);

            session.StateChanged += (x, e) => 
            {
                if (e.State == ProjectSessionState.Completed)
                {
                    MessageBox.Show(e.ReturnValue.ToString());
                }
            };
        }
    }
}