using System;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Windows.Threading;

namespace AutoUpdateEx
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        /// <summary>
        /// 更新程序界面图片显示控制器
        /// </summary>
        private DispatcherTimer ImagePlayTimer { get; set; }
        /// <summary>
        /// 本次启动使用的轮播图片库编号
        /// </summary>
        private int PlayGroup { get; set; } = 1;
        /// <summary>
        /// 正在播放的图片编号
        /// </summary>
        private int ImageIndex { get; set; } = 0;

        /// <summary>
        /// 更新程序实例
        /// </summary>
        private ViewModels.MainWindowViewModel MainWindowView { get; set; }

        /// <summary>
        /// 更新程序主界面
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();
            //设置窗口高度
            this.Height = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;
            if (this.Height > 768) this.Height = 768;
            //设置窗口宽度
            this.Width = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
            if (this.Width > 1024) this.Width = 1024;
        }

        /// <summary>
        /// 更新程序窗口加载事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            //显示版本号
            Ver.Text = "Ver " + System.Windows.Forms.Application.ProductVersion;
            //随机一组轮播图片库
            PlayGroup = new Random(Guid.NewGuid().GetHashCode()).Next(1,4);

            //程序启动显示第一张图片
            ImageIndex = 1;
            imgAd.Source = new BitmapImage(new Uri($"Component/CarouselFigure/Group{PlayGroup}/{ImageIndex}.png", UriKind.Relative));

            //初始化并启动图标轮播计时器，每隔三秒切换一次轮播图
            ImagePlayTimer = new DispatcherTimer() { Interval = TimeSpan.FromSeconds(3) };
            ImagePlayTimer.Tick += (s, args) =>
            {
                ImageIndex = ImageIndex < 3 ? (ImageIndex + 1) : 1;
                imgAd.Source = new BitmapImage(new Uri($"Component/CarouselFigure/Group{PlayGroup}/{ImageIndex}.png", UriKind.Relative));
            };
            ImagePlayTimer.Start();

            //初始化自动更新程序实例
            MainWindowView = new ViewModels.MainWindowViewModel();
            //绑定程序显示到窗口
            this.DataContext = MainWindowView;
            //显示初始提示
            MainWindowView.Message = "正在启动更新程序......";
            //异步运行更新和检测方法，执行收银系统完整性检测和更新，并在完整性检测和更新结束后启动收银系统主程序
            var task = new System.Threading.Tasks.TaskFactory().StartNew(() =>
            {
                MainWindowView.UpdateApplication();
            });
        }
    }
}