using Microsoft.Win32;
using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Threading;
using System.Windows;

namespace FastGithub.UI
{
 class Program
 {
 private const string MUTEX_NAME = "Global\\FastGithub.UI";
 private const string MAIN_WINDOWS = "MainWindow.xaml";
 private const string FASTGITHUB_PATH = "fastgithub.exe";

 [STAThread]
 static void Main(string[] args)
 {
 AppDomain.CurrentDomain.AssemblyResolve += OnAssemblyResolve;
 using var mutex = new Mutex(true, MUTEX_NAME, out var isFirstInstance);
 if (isFirstInstance == false)
 {
 return;
 }

 StartFastGithub();
 SetWebBrowserDPI();
 SetWebBrowserVersion();

 var app = new Application();
 app.StartupUri = new Uri(MAIN_WINDOWS, UriKind.Relative);
 app.Run();
 }

 /// <summary>
 /// 程序集加载失败时
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="args"></param>
 /// <returns></returns>
 private static Assembly? OnAssemblyResolve(object sender, ResolveEventArgs args)
 {
 var name = new AssemblyName(args.Name).Name;
 if (name.EndsWith(".resources"))
 {
 return default;
 }

 var stream = Application.GetResourceStream(new Uri($"Resource/{name}.dll", UriKind.Relative)).Stream;
 var buffer = new byte[stream.Length];
 stream.Read(buffer, 0, buffer.Length);
 return Assembly.Load(buffer);
 }

 /// <summary>
 /// 设置浏览器版本
 /// </summary>
 private static void SetWebBrowserVersion()
 {
 const string subKey = @"Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION";
 var registryKey = Registry.CurrentUser.OpenSubKey(subKey, true);
 if (registryKey == null)
 {
 registryKey = Registry.CurrentUser.CreateSubKey(subKey);
 }
 var name = $"{Process.GetCurrentProcess().ProcessName}.exe";
 using var webBrowser = new System.Windows.Forms.WebBrowser();
 var value = int.Parse($"{webBrowser.Version.Major}000");
 registryKey.SetValue(name, value, RegistryValueKind.DWord);
 }

 /// <summary>
 /// 设置浏览器DPI
 /// </summary>
 private static void SetWebBrowserDPI()
 {
 const string subKey = @"Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_96DPI_PIXEL";
 var registryKey = Registry.CurrentUser.OpenSubKey(subKey, true);
 if (registryKey == null)
 {
 registryKey = Registry.CurrentUser.CreateSubKey(subKey);
 }
 var name = $"{Process.GetCurrentProcess().ProcessName}.exe";
 registryKey.SetValue(name, 1, RegistryValueKind.DWord);
 }

 /// <summary>
 /// 启动fastgithub
 /// </summary>
 /// <returns></returns>
 private static void StartFastGithub()
 {
 if (File.Exists(FASTGITHUB_PATH) == false)
 {
 return;
 }

 var startInfo = new ProcessStartInfo
 {
 FileName = FASTGITHUB_PATH,
 Arguments = $"ParentProcessId={Process.GetCurrentProcess().Id} UdpLoggerPort={UdpLogger.Port}",
 UseShellExecute = false,
 CreateNoWindow = true
 };
 Process.Start(startInfo);
 }
 }
}