using Autodesk.Revit.DB;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EncapsulationProgressBar.ViewModels
{
    internal class ProgressMonitorViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private bool Cancel { get; set; }
        public string ProcessTitle { get; set; }
        public int MaxValue { get; set; } = 10;
        public int CurrentValue { get; set; } = 0;
        public string CurrentContext { get; set; } = string.Empty;
        private Views.ProgressMonitorView ProgressView { get; set; }

        private delegate void ProgressBarDelegate();
        public Action<int> Action { get; set; }
        private Document doc;
        public ProgressMonitorViewModel(Document doc )
        {
            this.doc = doc;
        }
        public void ProgressModal()
        {
            ProgressView = new Views.ProgressMonitorView();
            ProgressView.DataContext = this;
            ProgressView.Closed += CurrentUI_Closed;
            ProgressView.ContentRendered += ProgressEvent;

            ProgressView.ShowDialog();
        }
        private void ProgressEvent(object sender, EventArgs e)
        {
            ProgressView.ContentRendered -= ProgressEvent;
            #region 先决条件判断
            //Parameter parameter = CurrentWall.get_Parameter(BuiltInParameter.DOOR_NUMBER);
            //if (parameter.IsReadOnly)
            //{
            //    CloseWindow();
            //    throw new Exception("Mark parameter is read only");
            //}
            #endregion

            #region 处理内容
            using (Transaction t = new Transaction(doc, ProcessTitle))
            {
                t.Start();
                for (CurrentValue = 0; CurrentValue <= MaxValue; ++CurrentValue)
                {
                    if (Cancel)
                        break;
                    CurrentContext = string.Format("正在处理 {0} of {1} ", CurrentValue+1, MaxValue);
                    ProgressView.Dispatcher.Invoke(new ProgressBarDelegate(NotifyUI), System.Windows.Threading.DispatcherPriority.Background);


                    #region DoSomething

                    try
                    {
                        Action(CurrentValue);
                        //parameter.Set(CurrentViewModel.CurrentValue.ToString());
                    }
                    catch
                    {
                        CloseWindow();
                        throw new Exception("处理失败");
                    }

                    System.Threading.Thread.Sleep(50);

                    #endregion DoSomething

                    //CurrentContext = string.Format("处理完成 {0} of {1} ", CurrentValue, MaxValue);
                    //ProgressView.Dispatcher.Invoke(new ProgressBarDelegate(NotifyUI), System.Windows.Threading.DispatcherPriority.Background);
                }
                t.Commit();
            }
            #endregion

            CloseWindow();
        }
        public void NotifyUI()
        {
            Type classType = this.GetType();
            if (classType != null)
            {
                System.Reflection.PropertyInfo[] currentProperties = classType.GetProperties();
                foreach (System.Reflection.PropertyInfo currentProperty in currentProperties)
                    OnPropertyChanged(currentProperty.Name);
            }
        }

        private void OnPropertyChanged(string targetProperty)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(targetProperty));
        }
        private void CloseWindow()
        {
            ProgressView.Closed -= CurrentUI_Closed;
            ProgressView.Close();
        }

        private void CurrentUI_Closed(object sender, EventArgs e)
        {
            Cancel = true;
        }
    }
}