using System;
using System.Net.NetworkInformation;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;

namespace PingHandler
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            StartMonitoring();
        }

        private async void StartMonitoring()
        {
            while (true)
            {
                var latency = await GetNetworkLatency();
                UpdateUI(latency);
                await Task.Delay(1000); // 每秒钟更新一次
            }
        }

        private async Task<int> GetNetworkLatency()
        {
            try
            {
                var ping = new Ping();
                var reply = await ping.SendPingAsync("www.baidu.com", 1000);
                if (reply.Status == IPStatus.Success)
                {
                    return (int)reply.RoundtripTime;
                }
                else
                {
                    return -1;
                }
            }
            catch
            {
                return -1; // 网络断线
            }
        }

        private void UpdateUI(int latency)
        {
            if (latency == -1)
            {
                LatencyText.Text = "Disconnected";
                LatencyText.Foreground = Brushes.Red;
                LatencyProgressBar.Value = 0;
                LatencyProgressBar.Foreground = Brushes.Red;
                return;
            }

            LatencyText.Text = $"{latency} ms";

            if (latency < 50)
            {
                LatencyText.Foreground = Brushes.Green;
                LatencyProgressBar.Foreground = Brushes.Green;
                LatencyProgressBar.Value = latency;
            }
            else if (latency < 100)
            {
                LatencyText.Foreground = Brushes.Yellow;
                LatencyProgressBar.Foreground = Brushes.Yellow;
                LatencyProgressBar.Value = latency;
            }
            else if (latency < 200)
            {
                LatencyText.Foreground = Brushes.DarkOrange;
                LatencyProgressBar.Foreground = Brushes.DarkOrange;
                LatencyProgressBar.Value = latency;
            }
            else
            {
                LatencyText.Foreground = Brushes.Red;
                LatencyProgressBar.Foreground = Brushes.Red;
                LatencyProgressBar.Value = 200;
            }
        }

        private void Window_LocationChanged(object sender, EventArgs e)
        {
            CheckIfNearScreenEdge();
        }

        protected override void OnLocationChanged(EventArgs e)
        {
            base.OnLocationChanged(e);
            EnsureWindowIsOnScreen();
        }

        protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
        {
            base.OnRenderSizeChanged(sizeInfo);
            EnsureWindowIsOnScreen();
        }

        private void EnsureWindowIsOnScreen()
        {
            var desktopWorkingArea = SystemParameters.WorkArea;
            if (Left < desktopWorkingArea.Left) Left = desktopWorkingArea.Left;
            if (Top < desktopWorkingArea.Top) Top = desktopWorkingArea.Top;
            if (Left + Width > desktopWorkingArea.Right) Left = desktopWorkingArea.Right - Width;
            if (Top + Height > desktopWorkingArea.Bottom) Top = desktopWorkingArea.Bottom - Height;
        }

        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                DragMove();
            }
        }
        private void CheckIfNearScreenEdge()
        {
            var desktopWorkingArea = SystemParameters.WorkArea;
            const int edgeThreshold = 10; // 距离边缘的阈值

            if (Left <= desktopWorkingArea.Left + edgeThreshold)
            {
                Width = 20;
                Height = 200;
                LatencyText.Visibility = Visibility.Collapsed;
                MainBorder.Background = Brushes.Transparent;
                LatencyProgressBar.Style = (Style)Resources["VerticalProgressBar"];
                LatencyProgressBar.HorizontalAlignment = HorizontalAlignment.Stretch;
                LatencyProgressBar.VerticalAlignment = VerticalAlignment.Stretch;
            }
            else if (Left + Width >= desktopWorkingArea.Right - edgeThreshold)
            {
                Width = 20;
                Height = 200;
                LatencyText.Visibility = Visibility.Collapsed;
                MainBorder.Background = Brushes.Transparent;
                LatencyProgressBar.Style = (Style)Resources["VerticalProgressBar"];
                LatencyProgressBar.HorizontalAlignment = HorizontalAlignment.Stretch;
                LatencyProgressBar.VerticalAlignment = VerticalAlignment.Stretch;
            }
            else if (Top <= desktopWorkingArea.Top + edgeThreshold)
            {
                Width = 200;
                Height = 20;
                LatencyText.Visibility = Visibility.Collapsed;
                MainBorder.Background = Brushes.Transparent;
                LatencyProgressBar.Style = (Style)Resources["ColoredProgressBar"];
                LatencyProgressBar.HorizontalAlignment = HorizontalAlignment.Stretch;
                LatencyProgressBar.VerticalAlignment = VerticalAlignment.Stretch;
            }
            else
            {
                Width = 85;
                Height = 45;
                LatencyText.Visibility = Visibility.Visible;
                MainBorder.Background = new SolidColorBrush(Color.FromArgb(128, 0, 0, 0));
                LatencyProgressBar.Style = (Style)Resources["ColoredProgressBar"];
                LatencyProgressBar.HorizontalAlignment = HorizontalAlignment.Stretch;
                LatencyProgressBar.VerticalAlignment = VerticalAlignment.Bottom;
            }
        }

        private void Window_MouseEnter(object sender, MouseEventArgs e)
        {
            // Width = 200; // 扩展显示详细信息
        }

        private void Window_MouseLeave(object sender, MouseEventArgs e)
        {
            // Width = 85; // 缩小为进度条
        }

    }
    
}