using Debug.MODS;
using Microsoft.Win32;
using System.Runtime.InteropServices;
namespace Debug;
#pragma warning disable CA1416 // 验证平台兼容性
#pragma warning disable CS8600 // 将 null 字面量或可能为 null 的值转换为非 null 类型。
public class ProxySettingsHelper : Activity
{
    public const string Title = "服务器代理";
    // 引入WinINet API函数
    [DllImport("wininet.dll", SetLastError = true)]
    private static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);

    private const int INTERNET_OPTION_SETTINGS_CHANGED = 39;
    private const int INTERNET_OPTION_REFRESH = 37;

    public string? proxy = "127.0.0.1:7890"; // 代理服务器地址
    public bool enableProxy = false; // true 开启代理，false 关闭代理
    public ProxySettingsHelper(object class_)
    {
        enableProxy = IsProxyEnabled();
        _ = new ModeSwitch(class_, "Proxy设置", ["关闭代理", "打开代理"], (a) =>
        {
            switch (a)
            {
                case 0:
                    SetProxy(false, proxy);
                    break;
                case 1:
                    SetProxy(true, proxy);
                    break;
            }
            _ = new ProxySettingsHelper(class_);
        }, $"代理已{(enableProxy ? "开启" : "关闭")}，地址: {proxy}");
    }


    public void SetProxy(bool enable, string proxyAddress)
    {
        string proxyEnable = enable ? "1" : "0";
        string proxyServer = enable ? proxyAddress : "";

        using (RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings", true))
        {
            if (key != null)
            {
                key.SetValue("ProxyEnable", proxyEnable, RegistryValueKind.DWord);
                key.SetValue("ProxyServer", proxyServer, RegistryValueKind.String);
            }
        }

        // 使更改立即生效
        InternetSetOption(IntPtr.Zero, INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
        InternetSetOption(IntPtr.Zero, INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
    }

    public bool IsProxyEnabled()
    {
        using (RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings", false))
        {
            if (key == null) return false;

            object proxyEnable = key.GetValue("ProxyEnable");
            object proxyServer = key.GetValue("ProxyServer");

            bool enabled = proxyEnable != null && (int)proxyEnable == 1;
            if (enabled && proxyServer != null && proxyServer.ToString() != null)
            {
                proxy = proxyServer?.ToString();
            }

            return enabled;
        }
    }

}