using System;
using GalaSoft.MvvmLight.Ioc;
using Muchinfo.MTPClient.Data;
using Muchinfo.MTPClient.Data.Enums;
using Muchinfo.MTPClient.Infrastructure.Helpers;
using Muchinfo.MTPClient.UI.ViewModels;
using System.Windows.Controls;
using System.Windows.Input;

namespace Muchinfo.MTPClient.UI.Views
{
    /// <summary>
    /// SystemMenuTree.xaml 的交互逻辑
    /// </summary>
    public partial class SystemMenuTree : UserControl
    {
        private SysMenuItem _oldSysMenuItem = null;
        public SystemMenuTree()
        {

            InitializeComponent();
          
            //  trees.InitTreeview();
            MessengerHelper.DefaultRegister<MenuCommandType>(this, MessengerTokens.MenuSelectChange, (menuCommand) =>
            {
               var viewModel= this.DataContext as MenuTreeViewModel;
                if (viewModel != null)
                {
                   var menuItem= viewModel.FindSystemMenuItem(menuCommand);
                    if (menuItem != null)
                    {
                        menuItem.IsSelected = true;
                        TreeViewClick(menuItem);
                    }
                }
            });
            this.Unloaded += SystemMenuTree_Unloaded;
        }

        void SystemMenuTree_Unloaded(object sender, System.Windows.RoutedEventArgs e)
        {
            MessengerHelper.DefaultUnregister(this);
        }


     

        private void TreeViewClick(SysMenuItem sysItem)
        {

            if (sysItem != null && sysItem.Command != null && sysItem.IsEnabled)
            {
                ////点击买入、卖出、撤单时，选中不变
                if (sysItem.SysCommandType == MenuCommandType.BuyIn || sysItem.SysCommandType == MenuCommandType.Sellout || sysItem.SysCommandType == MenuCommandType.Cancel)
                {
                    sysItem.IsSelected = false;
                    if (_oldSysMenuItem != null) _oldSysMenuItem.IsSelected = true;
                }
                else
                {
                    _oldSysMenuItem = sysItem; 
                }
                sysItem.Command.Execute(sysItem);
            }
        }


        private void TreeView_OnMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            TreeViewClick(   FunctionTreeView.SelectedItem as SysMenuItem);
        }
    }
}