using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.ComponentModel;
using connor_zwcadm.util;

namespace connor_zwcadm.dialog {
   public class KBackgroundWorker {
      public BackgroundWorker backgroundWorker { get; }
      private Window parent;
      public KProgressBar pbDialog;
      public string CompleteMessage { get; set; }

      public KBackgroundWorker(string completeMessage=null, Window parent = null) {
         this.parent = parent;
         this.CompleteMessage = completeMessage;
         //可以返回工作进度
         backgroundWorker = new BackgroundWorker();
         backgroundWorker.WorkerReportsProgress = true;
         //允许取消
         backgroundWorker.WorkerSupportsCancellation = true;
         backgroundWorker.RunWorkerCompleted += backgroundWorker_RunWorkerCompleted;
         //更新进度条
         backgroundWorker.ProgressChanged += backgroundWorker_ProgressChanged;
      }

      public void Start(object param, bool disableCancel = true) {
         if (backgroundWorker.IsBusy) {
            return;
         }
         if (parent != null) {
            parent.IsEnabled = false;
         }
         pbDialog = new KProgressBar(backgroundWorker);
         if (disableCancel) {
            pbDialog.tb_cancel.Width = 0;
            pbDialog.tb_cancel.Visibility = Visibility.Hidden;
         }
         backgroundWorker.RunWorkerAsync(param);
      }

      public bool IsCancel() {
         return backgroundWorker.CancellationPending;
      }


      private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
         pbDialog.Dispatcher.Invoke(new Action(delegate {
            pbDialog.Close();
         }));
         if (parent != null) {
            parent.IsEnabled = true;
         }
         if (e.Error != null) {
            KUtil.LogErr(e.Error);
            ZwSoft.ZwCAD.ApplicationServices.Application.ShowAlertDialog(e.Error.Message);
         }
         else {
            if (e.Cancelled) {
               ZwSoft.ZwCAD.ApplicationServices.Application.ShowAlertDialog("已取消");
            }
            else if(!string.IsNullOrWhiteSpace(CompleteMessage)) {
               ZwSoft.ZwCAD.ApplicationServices.Application.ShowAlertDialog(CompleteMessage);
            }
         }
      }

      private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) {
         pbDialog.Dispatcher.Invoke(new Action(delegate { 
            pbDialog.progressBar.Value = e.ProgressPercentage;
         }));
      }

      public void Progress(string text, string detail, int progress) {
         pbDialog.Dispatcher.Invoke(new Action(delegate {
            pbDialog.l_MainProgress.Content = text;
            pbDialog.l_SubProcess.Content = detail;
         }));
         if (progress >= 0) {
            backgroundWorker.ReportProgress(progress);
         }
      }

      public void Progress(string text, int progress) {
         Progress(text, text, progress);
      }

      public void ProgressDetail(string text) {
         pbDialog.Dispatcher.Invoke(new Action(delegate {
            pbDialog.l_SubProcess.Content = text;
         }));
      }

      public void Progress(string text, int index, int limit) {
         Progress(text, (index + 1) * 100 / limit);
      }
   }
}